Merge pull request #2170 from laurazard/bump-buildkit

deps: update buildkit, vendor changes

driver/docker-container/driver.go

@@ -392,7 +392,7 @@ func (d *Driver) Client(ctx context.Context) (*client.Client, error) {
 
 	conn = demuxConn(conn)
 
-	exp, err := detect.Exporter()
+	exp, _, err := detect.Exporter()
 	if err != nil {
 		return nil, err
 	}

driver/docker/driver.go

@@ -66,7 +66,7 @@ func (d *Driver) Client(ctx context.Context) (*client.Client, error) {
 		}),
 	}
 
-	exp, err := detect.Exporter()
+	exp, _, err := detect.Exporter()
 	if err != nil {
 		return nil, err
 	}

driver/kubernetes/driver.go

@@ -209,7 +209,7 @@ func (d *Driver) Client(ctx context.Context) (*client.Client, error) {
 		return nil, err
 	}
 
-	exp, err := detect.Exporter()
+	exp, _, err := detect.Exporter()
 	if err != nil {
 		return nil, err
 	}

driver/remote/driver.go

@@ -74,7 +74,7 @@ func (d *Driver) Rm(ctx context.Context, force, rmVolume, rmDaemon bool) error {
 func (d *Driver) Client(ctx context.Context) (*client.Client, error) {
 	opts := []client.ClientOpt{}
 
-	exp, err := detect.Exporter()
+	exp, _, err := detect.Exporter()
 	if err != nil {
 		return nil, err
 	}

go.mod

@@ -7,7 +7,7 @@ require (
 	github.com/aws/aws-sdk-go-v2/config v1.18.16
 	github.com/compose-spec/compose-go v1.20.0
 	github.com/containerd/console v1.0.3
-	github.com/containerd/containerd v1.7.9
+	github.com/containerd/containerd v1.7.11
 	github.com/containerd/continuity v0.4.2
 	github.com/containerd/log v0.1.0
 	github.com/containerd/typeurl/v2 v2.1.1
@@ -24,7 +24,7 @@ require (
 	github.com/google/uuid v1.3.0
 	github.com/hashicorp/go-cty-funcs v0.0.0-20230405223818-a090f58aa992
 	github.com/hashicorp/hcl/v2 v2.19.1
-	github.com/moby/buildkit v0.13.0-beta1.0.20231129145300-c9ee8491d74f // master (v0.13.0-dev)
+	github.com/moby/buildkit v0.13.0-beta1.0.20231219135447-957cb50df991 // master (v0.13.0-dev)
 	github.com/moby/sys/mountinfo v0.6.2
 	github.com/moby/sys/signal v0.7.0
 	github.com/morikuni/aec v1.0.0
@@ -120,10 +120,10 @@ require (
 	github.com/modern-go/reflect2 v1.0.2 // indirect
 	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
 	github.com/pmezard/go-difflib v1.0.0 // indirect
-	github.com/prometheus/client_golang v1.14.0 // indirect
+	github.com/prometheus/client_golang v1.16.0 // indirect
-	github.com/prometheus/client_model v0.3.0 // indirect
+	github.com/prometheus/client_model v0.4.0 // indirect
 	github.com/prometheus/common v0.42.0 // indirect
-	github.com/prometheus/procfs v0.9.0 // indirect
+	github.com/prometheus/procfs v0.10.1 // indirect
 	github.com/rivo/uniseg v0.2.0 // indirect
 	github.com/secure-systems-lab/go-securesystemslib v0.4.0 // indirect
 	github.com/shibumi/go-pathspec v1.3.0 // indirect
@@ -137,11 +137,16 @@ require (
 	go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc v0.45.0 // indirect
 	go.opentelemetry.io/contrib/instrumentation/net/http/httptrace/otelhttptrace v0.45.0 // indirect
 	go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.45.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlpmetric v0.42.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v0.42.0 // indirect
+	go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v0.42.0 // indirect
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.19.0 // indirect
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.19.0 // indirect
 	go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.19.0 // indirect
+	go.opentelemetry.io/otel/exporters/prometheus v0.42.0 // indirect
 	go.opentelemetry.io/otel/metric v1.19.0 // indirect
 	go.opentelemetry.io/otel/sdk v1.19.0 // indirect
+	go.opentelemetry.io/otel/sdk/metric v1.19.0 // indirect
 	go.opentelemetry.io/proto/otlp v1.0.0 // indirect
 	golang.org/x/crypto v0.14.0 // indirect
 	golang.org/x/exp v0.0.0-20230713183714-613f0c0eb8a1 // indirect

go.sum

@@ -92,8 +92,8 @@ github.com/containerd/cgroups v1.1.0 h1:v8rEWFl6EoqHB+swVNjVoCJE8o3jX7e8nqBGPLaD
 github.com/containerd/cgroups v1.1.0/go.mod h1:6ppBcbh/NOOUU+dMKrykgaBnK9lCIBxHqJDGwsa1mIw=
 github.com/containerd/console v1.0.3 h1:lIr7SlA5PxZyMV30bDW0MGbiOPXwc63yRuCP0ARubLw=
 github.com/containerd/console v1.0.3/go.mod h1:7LqA/THxQ86k76b8c/EMSiaJ3h1eZkMkXar0TQ1gf3U=
-github.com/containerd/containerd v1.7.9 h1:KOhK01szQbM80YfW1H6RZKh85PHGqY/9OcEZ35Je8sc=
+github.com/containerd/containerd v1.7.11 h1:lfGKw3eU35sjV0aG2eYZTiwFEY1pCzxdzicHP3SZILw=
-github.com/containerd/containerd v1.7.9/go.mod h1:0/W44LWEYfSHoxBtsHIiNU/duEkgpMokemafHVCpq9Y=
+github.com/containerd/containerd v1.7.11/go.mod h1:5UluHxHTX2rdvYuZ5OJTC5m/KJNs0Zs9wVoJm9zf5ZE=
 github.com/containerd/continuity v0.4.2 h1:v3y/4Yz5jwnvqPKJJ+7Wf93fyWoCB3F5EclWG023MDM=
 github.com/containerd/continuity v0.4.2/go.mod h1:F6PTNCKepoxEaXLQp3wDAjygEnImnZ/7o4JzpodfroQ=
 github.com/containerd/fifo v1.1.0 h1:4I2mbh5stb1u6ycIABlBw9zgtlK8viPI9QkQNRQEEmY=
@@ -206,7 +206,6 @@ github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5y
 github.com/golang/protobuf v1.3.2/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.3/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
 github.com/golang/protobuf v1.3.4/go.mod h1:vzj43D7+SQXF/4pzW/hwtAqwc6iTitCiVSaWz5lYuqw=
-github.com/golang/protobuf v1.3.5/go.mod h1:6O5/vntMXwX2lRkT1hjjk0nAC1IDOTvTlVgjlRvqsdk=
 github.com/golang/protobuf v1.4.0-rc.1/go.mod h1:ceaxUfeHdC40wWswd/P6IGgMaK3YpKi5j83Wpe3EHw8=
 github.com/golang/protobuf v1.4.0-rc.1.0.20200221234624-67d41d38c208/go.mod h1:xKAWHe0F5eneWXFV3EuXVDTCmh+JuBKY0li0aMyXATA=
 github.com/golang/protobuf v1.4.0-rc.2/go.mod h1:LlEzMj4AhA7rCAGe4KMBDvJI+AwstrUpVNzEA03Pprs=
@@ -318,8 +317,8 @@ github.com/mitchellh/go-wordwrap v0.0.0-20150314170334-ad45545899c7/go.mod h1:ZX
 github.com/mitchellh/mapstructure v0.0.0-20150613213606-2caf8efc9366/go.mod h1:FVVH3fgwuzCH5S8UJGiWEs2h04kUh9fWfEaFds41c1Y=
 github.com/mitchellh/mapstructure v1.5.0 h1:jeMsZIYE/09sWLaz43PL7Gy6RuMjD2eJVyuac5Z2hdY=
 github.com/mitchellh/mapstructure v1.5.0/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
-github.com/moby/buildkit v0.13.0-beta1.0.20231129145300-c9ee8491d74f h1:4cKlhf1VAERk8ycrBAeHVEE+tPgogx9wl97SHlCNCGg=
+github.com/moby/buildkit v0.13.0-beta1.0.20231219135447-957cb50df991 h1:r80LLQ91uOLxU1ElAvrB1o8oBsph51lPzVnr7t2b200=
-github.com/moby/buildkit v0.13.0-beta1.0.20231129145300-c9ee8491d74f/go.mod h1:WZBEvD1dKbPOPS84u1qz4Ja4l8uPD37w4PlpwdhxvKE=
+github.com/moby/buildkit v0.13.0-beta1.0.20231219135447-957cb50df991/go.mod h1:6MddWPSL5jxy+W8eMMHWDOfZzzRRKWXPZqajw72YHBc=
 github.com/moby/locker v1.0.1 h1:fOXqR41zeveg4fFODix+1Ch4mj/gT0NE1XJbp/epuBg=
 github.com/moby/locker v1.0.1/go.mod h1:S7SDdo5zpBK84bzzVlKr2V0hz+7x9hWbYC/kq7oQppc=
 github.com/moby/patternmatcher v0.6.0 h1:GmP9lR19aU5GqSSFko+5pRqHi+Ohk1O69aFiKkVGiPk=
@@ -384,14 +383,14 @@ github.com/prometheus/client_golang v0.9.0-pre1.0.20180209125602-c332b6f63c06/go
 github.com/prometheus/client_golang v0.9.1/go.mod h1:7SWBe2y4D6OKWSNQJUaRYU/AaXPKyh/dDVn+NZz0KFw=
 github.com/prometheus/client_golang v1.0.0/go.mod h1:db9x61etRT2tGnBNRi70OPL5FsnadC4Ky3P0J6CfImo=
 github.com/prometheus/client_golang v1.1.0/go.mod h1:I1FGZT9+L76gKKOs5djB6ezCbFQP1xR9D75/vuwEF3g=
-github.com/prometheus/client_golang v1.14.0 h1:nJdhIvne2eSX/XRAFV9PcvFFRbrjbcTUj0VP62TMhnw=
+github.com/prometheus/client_golang v1.16.0 h1:yk/hx9hDbrGHovbci4BY+pRMfSuuat626eFsHb7tmT8=
-github.com/prometheus/client_golang v1.14.0/go.mod h1:8vpkKitgIVNcqrRBWh1C4TIUQgYNtG/XQE4E/Zae36Y=
+github.com/prometheus/client_golang v1.16.0/go.mod h1:Zsulrv/L9oM40tJ7T815tM89lFEugiJ9HzIqaAx4LKc=
 github.com/prometheus/client_model v0.0.0-20171117100541-99fa1f4be8e5/go.mod h1:MbSGuTsp3dbXC40dX6PRTWyKYBIrTGTE9sqQNg2J8bo=
 github.com/prometheus/client_model v0.0.0-20180712105110-5c3871d89910/go.mod h1:MbSGuTsp3dbXC40dX6PRTWyKYBIrTGTE9sqQNg2J8bo=
 github.com/prometheus/client_model v0.0.0-20190129233127-fd36f4220a90/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/prometheus/client_model v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
-github.com/prometheus/client_model v0.3.0 h1:UBgGFHqYdG/TPFD1B1ogZywDqEkwp3fBMvqdiQ7Xew4=
+github.com/prometheus/client_model v0.4.0 h1:5lQXD3cAg1OXBf4Wq03gTrXHeaV0TQvGfUooCfx1yqY=
-github.com/prometheus/client_model v0.3.0/go.mod h1:LDGWKZIo7rky3hgvBe+caln+Dr3dPggB5dvjtD7w9+w=
+github.com/prometheus/client_model v0.4.0/go.mod h1:oMQmHW1/JoDwqLtg57MGgP/Fb1CJEYF2imWWhWtMkYU=
 github.com/prometheus/common v0.0.0-20180110214958-89604d197083/go.mod h1:daVV7qP5qjZbuso7PdcryaAu0sAZbrN9i7WWcTMWvro=
 github.com/prometheus/common v0.4.1/go.mod h1:TNfzLD0ON7rHzMJeJkieUDPYmFC7Snx/y86RQel1bk4=
 github.com/prometheus/common v0.6.0/go.mod h1:eBmuwkDJBwy6iBfxCBob6t6dR6ENT/y+J+Zk0j9GMYc=
@@ -402,8 +401,8 @@ github.com/prometheus/procfs v0.0.0-20181005140218-185b4288413d/go.mod h1:c3At6R
 github.com/prometheus/procfs v0.0.2/go.mod h1:TjEm7ze935MbeOT/UhFTIMYKhuLP4wbCsTZCD3I8kEA=
 github.com/prometheus/procfs v0.0.3/go.mod h1:4A/X28fw3Fc593LaREMrKMqOKvUAntwMDaekg4FpcdQ=
 github.com/prometheus/procfs v0.6.0/go.mod h1:cz+aTbrPOrUb4q7XlbU9ygM+/jj0fzG6c1xBZuNvfVA=
-github.com/prometheus/procfs v0.9.0 h1:wzCHvIvM5SxWqYvwgVL7yJY8Lz3PKn49KQtpgMYJfhI=
+github.com/prometheus/procfs v0.10.1 h1:kYK1Va/YMlutzCGazswoHKo//tZVlFpKYh+PymziUAg=
-github.com/prometheus/procfs v0.9.0/go.mod h1:+pB4zwohETzFnmlpe6yd2lSc+0/46IYZRB/chUwxUZY=
+github.com/prometheus/procfs v0.10.1/go.mod h1:nwNm2aOCAYw8uTR/9bWRREkZFxAUcWzPHWJq+XBB/FM=
 github.com/rivo/uniseg v0.2.0 h1:S1pD9weZBuJdFmowNwbpi7BJ8TNftyUImj/0WQi72jY=
 github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
 github.com/rogpeppe/go-internal v1.10.0 h1:TMyTOH3F/DB16zRVcYyreMH6GnZZrwQVAoYjRBZyWFQ=
@@ -483,16 +482,26 @@ go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.45.0 h1:x8Z78aZ
 go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp v0.45.0/go.mod h1:62CPTSry9QZtOaSsE3tOzhx6LzDhHnXJ6xHeMNNiM6Q=
 go.opentelemetry.io/otel v1.19.0 h1:MuS/TNf4/j4IXsZuJegVzI1cwut7Qc00344rgH7p8bs=
 go.opentelemetry.io/otel v1.19.0/go.mod h1:i0QyjOq3UPoTzff0PJB2N66fb4S0+rSbSB15/oyH9fY=
+go.opentelemetry.io/otel/exporters/otlp/otlpmetric v0.42.0 h1:ZtfnDL+tUrs1F0Pzfwbg2d59Gru9NCH3bgSHBM6LDwU=
+go.opentelemetry.io/otel/exporters/otlp/otlpmetric v0.42.0/go.mod h1:hG4Fj/y8TR/tlEDREo8tWstl9fO9gcFkn4xrx0Io8xU=
+go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v0.42.0 h1:NmnYCiR0qNufkldjVvyQfZTHSdzeHoZ41zggMsdMcLM=
+go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v0.42.0/go.mod h1:UVAO61+umUsHLtYb8KXXRoHtxUkdOPkYidzW3gipRLQ=
+go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v0.42.0 h1:wNMDy/LVGLj2h3p6zg4d0gypKfWKSWI14E1C4smOgl8=
+go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v0.42.0/go.mod h1:YfbDdXAAkemWJK3H/DshvlrxqFB2rtW4rY6ky/3x/H0=
 go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.19.0 h1:Mne5On7VWdx7omSrSSZvM4Kw7cS7NQkOOmLcgscI51U=
 go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.19.0/go.mod h1:IPtUMKL4O3tH5y+iXVyAXqpAwMuzC1IrxVS81rummfE=
 go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.19.0 h1:3d+S281UTjM+AbF31XSOYn1qXn3BgIdWl8HNEpx08Jk=
 go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc v1.19.0/go.mod h1:0+KuTDyKL4gjKCF75pHOX4wuzYDUZYfAQdSu43o+Z2I=
 go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.19.0 h1:IeMeyr1aBvBiPVYihXIaeIZba6b8E1bYp7lbdxK8CQg=
 go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp v1.19.0/go.mod h1:oVdCUtjq9MK9BlS7TtucsQwUcXcymNiEDjgDD2jMtZU=
+go.opentelemetry.io/otel/exporters/prometheus v0.42.0 h1:jwV9iQdvp38fxXi8ZC+lNpxjK16MRcZlpDYvbuO1FiA=
+go.opentelemetry.io/otel/exporters/prometheus v0.42.0/go.mod h1:f3bYiqNqhoPxkvI2LrXqQVC546K7BuRDL/kKuxkujhA=
 go.opentelemetry.io/otel/metric v1.19.0 h1:aTzpGtV0ar9wlV4Sna9sdJyII5jTVJEvKETPiOKwvpE=
 go.opentelemetry.io/otel/metric v1.19.0/go.mod h1:L5rUsV9kM1IxCj1MmSdS+JQAcVm319EUrDVLrt7jqt8=
 go.opentelemetry.io/otel/sdk v1.19.0 h1:6USY6zH+L8uMH8L3t1enZPR3WFEmSTADlqldyHtJi3o=
 go.opentelemetry.io/otel/sdk v1.19.0/go.mod h1:NedEbbS4w3C6zElbLdPJKOpJQOrGUJ+GfzpjUvI0v1A=
+go.opentelemetry.io/otel/sdk/metric v1.19.0 h1:EJoTO5qysMsYCa+w4UghwFV/ptQgqSL/8Ni+hx+8i1k=
+go.opentelemetry.io/otel/sdk/metric v1.19.0/go.mod h1:XjG0jQyFJrv2PbMvwND7LwCEhsJzCzV5210euduKcKY=
 go.opentelemetry.io/otel/trace v1.19.0 h1:DFVQmlVbfVeOuBRrwdtaehRrWiL1JoVs9CPIQ1Dzxpg=
 go.opentelemetry.io/otel/trace v1.19.0/go.mod h1:mfaSyvGyEJEI0nyV2I4qhNQnbBOUUmYZpYojqMnX2vo=
 go.opentelemetry.io/proto/otlp v1.0.0 h1:T0TX0tmXU8a3CbNXzEKGeU5mIVOdf0oykP+u2lIVU/I=

vendor/github.com/containerd/containerd/remotes/docker/httpreadseeker.go

@@ -76,6 +76,16 @@ func (hrs *httpReadSeeker) Read(p []byte) (n int, err error) {
 		if _, err2 := hrs.reader(); err2 == nil {
 			return n, nil
 		}
+	} else if err == io.EOF {
+		// The CRI's imagePullProgressTimeout relies on responseBody.Close to
+		// update the process monitor's status. If the err is io.EOF, close
+		// the connection since there is no more available data.
+		if hrs.rc != nil {
+			if clsErr := hrs.rc.Close(); clsErr != nil {
+				log.L.WithError(clsErr).Error("httpReadSeeker: failed to close ReadCloser after io.EOF")
+			}
+			hrs.rc = nil
+		}
 	}
 	return
 }

vendor/github.com/containerd/containerd/remotes/docker/resolver.go

@@ -585,18 +585,13 @@ func (r *request) do(ctx context.Context) (*http.Response, error) {
 			return nil
 		}
 	}
-	_, httpSpan := tracing.StartSpan(
+
-		ctx,
+	tracing.UpdateHTTPClient(client, tracing.Name("remotes.docker.resolver", "HTTPRequest"))
-		tracing.Name("remotes.docker.resolver", "HTTPRequest"),
+
-		tracing.WithHTTPRequest(req),
-	)
-	defer httpSpan.End()
 	resp, err := client.Do(req)
 	if err != nil {
-		httpSpan.SetStatus(err)
 		return nil, fmt.Errorf("failed to do request: %w", err)
 	}
-	httpSpan.SetAttributes(tracing.HTTPStatusCodeAttributes(resp.StatusCode)...)
 	log.G(ctx).WithFields(responseFields(resp)).Debug("fetch response received")
 	return resp, nil
 }

vendor/github.com/containerd/containerd/remotes/handlers.go

@@ -361,8 +361,15 @@ func annotateDistributionSourceHandler(f images.HandlerFunc, provider content.In
 			return children, nil
 		}
 
-		// parentInfo can be used to inherit info for non-existent blobs
+		parentSourceAnnotations := desc.Annotations
-		var parentInfo *content.Info
+		var parentLabels map[string]string
+		if pi, err := provider.Info(ctx, desc.Digest); err != nil {
+			if !errdefs.IsNotFound(err) {
+				return nil, err
+			}
+		} else {
+			parentLabels = pi.Labels
+		}
 
 		for i := range children {
 			child := children[i]
@@ -372,32 +379,35 @@ func annotateDistributionSourceHandler(f images.HandlerFunc, provider content.In
 				if !errdefs.IsNotFound(err) {
 					return nil, err
 				}
-				if parentInfo == nil {
-					pi, err := provider.Info(ctx, desc.Digest)
-					if err != nil {
-						return nil, err
-					}
-					parentInfo = &pi
-				}
-				// Blob may not exist locally, annotate with parent labels for cross repo
-				// mount or fetch. Parent sources may apply to all children since most
-				// registries enforce that children exist before the manifests.
-				info = *parentInfo
 			}
+			copyDistributionSourceLabels(info.Labels, &child)
 
-			for k, v := range info.Labels {
+			// Annotate with parent labels for cross repo mount or fetch.
-				if !strings.HasPrefix(k, labels.LabelDistributionSource+".") {
+			// Parent sources may apply to all children since most registries
-					continue
+			// enforce that children exist before the manifests.
-				}
+			copyDistributionSourceLabels(parentSourceAnnotations, &child)
-
+			copyDistributionSourceLabels(parentLabels, &child)
-				if child.Annotations == nil {
-					child.Annotations = map[string]string{}
-				}
-				child.Annotations[k] = v
-			}
 
 			children[i] = child
 		}
 		return children, nil
 	}
 }
+
+func copyDistributionSourceLabels(from map[string]string, to *ocispec.Descriptor) {
+	for k, v := range from {
+		if !strings.HasPrefix(k, labels.LabelDistributionSource+".") {
+			continue
+		}
+
+		if to.Annotations == nil {
+			to.Annotations = make(map[string]string)
+		} else {
+			// Only propagate the parent label if the child doesn't already have it.
+			if _, has := to.Annotations[k]; has {
+				continue
+			}
+		}
+		to.Annotations[k] = v
+	}
+}

vendor/github.com/containerd/containerd/tracing/tracing.go

@@ -20,11 +20,11 @@ import (
 	"context"
 	"net/http"
 
+	"go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp"
 	"go.opentelemetry.io/otel"
 	"go.opentelemetry.io/otel/attribute"
 	"go.opentelemetry.io/otel/codes"
-	semconv "go.opentelemetry.io/otel/semconv/v1.17.0"
+	semconv "go.opentelemetry.io/otel/semconv/v1.21.0"
-	httpconv "go.opentelemetry.io/otel/semconv/v1.17.0/httpconv"
 	"go.opentelemetry.io/otel/trace"
 )
 
@@ -37,15 +37,27 @@ type SpanOpt func(config *StartConfig)
 
 // WithHTTPRequest marks span as a HTTP request operation from client to server.
 // It'll append attributes from the HTTP request object and mark it with `SpanKindClient` type.
-func WithHTTPRequest(request *http.Request) SpanOpt {
+//
+// Deprecated: use upstream functionality from otelhttp directly instead. This function is kept for API compatibility
+// but no longer works as expected due to required functionality no longer exported in OpenTelemetry libraries.
+func WithHTTPRequest(_ *http.Request) SpanOpt {
 	return func(config *StartConfig) {
 		config.spanOpts = append(config.spanOpts,
-			trace.WithSpanKind(trace.SpanKindClient),                 // A client making a request to a server
+			trace.WithSpanKind(trace.SpanKindClient), // A client making a request to a server
-			trace.WithAttributes(httpconv.ClientRequest(request)...), // Add HTTP attributes
 		)
 	}
 }
 
+// UpdateHTTPClient updates the http client with the necessary otel transport
+func UpdateHTTPClient(client *http.Client, name string) {
+	client.Transport = otelhttp.NewTransport(
+		client.Transport,
+		otelhttp.WithSpanNameFormatter(func(operation string, r *http.Request) string {
+			return name
+		}),
+	)
+}
+
 // StartSpan starts child span in a context.
 func StartSpan(ctx context.Context, opName string, opts ...SpanOpt) (context.Context, *Span) {
 	config := StartConfig{}

vendor/github.com/containerd/containerd/version/version.go

@@ -23,7 +23,7 @@ var (
 	Package = "github.com/containerd/containerd"
 
 	// Version holds the complete version number. Filled in at linking time.
-	Version = "1.7.9+unknown"
+	Version = "1.7.11+unknown"
 
 	// Revision is filled with the VCS (e.g. git) revision being used to build
 	// the program at linking time.

vendor/github.com/moby/buildkit/client/client.go

@@ -59,9 +59,6 @@ func New(ctx context.Context, address string, opts ...ClientOpt) (*Client, error
 	var creds *withCredentials
 
 	for _, o := range opts {
-		if _, ok := o.(*withFailFast); ok {
-			gopts = append(gopts, grpc.FailOnNonTempDialError(true))
-		}
 		if credInfo, ok := o.(*withCredentials); ok {
 			if creds == nil {
 				creds = &withCredentials{}
@@ -205,7 +202,7 @@ func (c *Client) Wait(ctx context.Context) error {
 
 		select {
 		case <-ctx.Done():
-			return ctx.Err()
+			return context.Cause(ctx)
 		case <-time.After(time.Second):
 		}
 		c.conn.ResetConnectBackoff()
@@ -216,14 +213,6 @@ func (c *Client) Close() error {
 	return c.conn.Close()
 }
 
-type withFailFast struct{}
-
-func (*withFailFast) isClientOpt() {}
-
-func WithFailFast() ClientOpt {
-	return &withFailFast{}
-}
-
 type withDialer struct {
 	dialer func(context.Context, string) (net.Conn, error)
 }

vendor/github.com/moby/buildkit/client/llb/async.go

@@ -61,7 +61,7 @@ func (as *asyncState) Do(ctx context.Context, c *Constraints) error {
 		if err != nil {
 			select {
 			case <-ctx.Done():
-				if errors.Is(err, ctx.Err()) {
+				if errors.Is(err, context.Cause(ctx)) {
 					return res, err
 				}
 			default:

vendor/github.com/moby/buildkit/client/solve.go

@@ -106,8 +106,8 @@ func (c *Client) solve(ctx context.Context, def *llb.Definition, runGateway runG
 	}
 	eg, ctx := errgroup.WithContext(ctx)
 
-	statusContext, cancelStatus := context.WithCancel(context.Background())
+	statusContext, cancelStatus := context.WithCancelCause(context.Background())
-	defer cancelStatus()
+	defer cancelStatus(errors.WithStack(context.Canceled))
 
 	if span := trace.SpanFromContext(ctx); span.SpanContext().IsValid() {
 		statusContext = trace.ContextWithSpan(statusContext, span)
@@ -230,16 +230,16 @@ func (c *Client) solve(ctx context.Context, def *llb.Definition, runGateway runG
 		frontendAttrs[k] = v
 	}
 
-	solveCtx, cancelSolve := context.WithCancel(ctx)
+	solveCtx, cancelSolve := context.WithCancelCause(ctx)
 	var res *SolveResponse
 	eg.Go(func() error {
 		ctx := solveCtx
-		defer cancelSolve()
+		defer cancelSolve(errors.WithStack(context.Canceled))
 
 		defer func() { // make sure the Status ends cleanly on build errors
 			go func() {
 				<-time.After(3 * time.Second)
-				cancelStatus()
+				cancelStatus(errors.WithStack(context.Canceled))
 			}()
 			if !opt.SessionPreInitialized {
 				bklog.G(ctx).Debugf("stopping session")
@@ -298,7 +298,7 @@ func (c *Client) solve(ctx context.Context, def *llb.Definition, runGateway runG
 			select {
 			case <-solveCtx.Done():
 			case <-time.After(5 * time.Second):
-				cancelSolve()
+				cancelSolve(errors.WithStack(context.Canceled))
 			}
 
 			return err

vendor/github.com/moby/buildkit/frontend/dockerui/config.go

@@ -95,7 +95,7 @@ type Source struct {
 
 type ContextOpt struct {
 	NoDockerignore bool
-	LocalOpts      []llb.LocalOption
+	AsyncLocalOpts func() []llb.LocalOption
 	Platform       *ocispecs.Platform
 	ResolveMode    string
 	CaptureDigest  *digest.Digest
@@ -473,11 +473,8 @@ func (bc *Client) NamedContext(ctx context.Context, name string, opt ContextOpt)
 	}
 	pname := name + "::" + platforms.Format(platforms.Normalize(pp))
 	st, img, err := bc.namedContext(ctx, name, pname, opt)
-	if err != nil {
+	if err != nil || st != nil {
-		return nil, nil, err
+		return st, img, err
-	}
-	if st != nil {
-		return st, img, nil
 	}
 	return bc.namedContext(ctx, name, name, opt)
 }

vendor/github.com/moby/buildkit/frontend/dockerui/namedcontext.go

@@ -6,12 +6,14 @@ import (
 	"encoding/json"
 	"fmt"
 	"strings"
+	"sync"
 
 	"github.com/distribution/reference"
 	"github.com/moby/buildkit/client/llb"
 	"github.com/moby/buildkit/exporter/containerimage/exptypes"
 	"github.com/moby/buildkit/exporter/containerimage/image"
 	"github.com/moby/buildkit/frontend/gateway/client"
+	"github.com/moby/buildkit/solver/pb"
 	"github.com/moby/buildkit/util/imageutil"
 	"github.com/moby/patternmatcher/ignorefile"
 	"github.com/pkg/errors"
@@ -212,12 +214,15 @@ func (bc *Client) namedContextRecursive(ctx context.Context, name string, nameWi
 				}
 			}
 		}
-		st = llb.Local(vv[1],
+
-			llb.WithCustomName("[context "+nameWithPlatform+"] load from client"),
+		localOutput := &asyncLocalOutput{
-			llb.SessionID(bc.bopts.SessionID),
+			name:             vv[1],
-			llb.SharedKeyHint("context:"+nameWithPlatform),
+			nameWithPlatform: nameWithPlatform,
-			llb.ExcludePatterns(excludes),
+			sessionID:        bc.bopts.SessionID,
-		)
+			excludes:         excludes,
+			extraOpts:        opt.AsyncLocalOpts,
+		}
+		st = llb.NewState(localOutput)
 		return &st, nil, nil
 	case "input":
 		inputs, err := bc.client.Inputs(ctx)
@@ -251,3 +256,41 @@ func (bc *Client) namedContextRecursive(ctx context.Context, name string, nameWi
 		return nil, nil, errors.Errorf("unsupported context source %s for %s", vv[0], nameWithPlatform)
 	}
 }
+
+// asyncLocalOutput is an llb.Output that computes an llb.Local
+// on-demand instead of at the time of initialization.
+type asyncLocalOutput struct {
+	llb.Output
+	name             string
+	nameWithPlatform string
+	sessionID        string
+	excludes         []string
+	extraOpts        func() []llb.LocalOption
+	once             sync.Once
+}
+
+func (a *asyncLocalOutput) ToInput(ctx context.Context, constraints *llb.Constraints) (*pb.Input, error) {
+	a.once.Do(a.do)
+	return a.Output.ToInput(ctx, constraints)
+}
+
+func (a *asyncLocalOutput) Vertex(ctx context.Context, constraints *llb.Constraints) llb.Vertex {
+	a.once.Do(a.do)
+	return a.Output.Vertex(ctx, constraints)
+}
+
+func (a *asyncLocalOutput) do() {
+	var extraOpts []llb.LocalOption
+	if a.extraOpts != nil {
+		extraOpts = a.extraOpts()
+	}
+	opts := append([]llb.LocalOption{
+		llb.WithCustomName("[context " + a.nameWithPlatform + "] load from client"),
+		llb.SessionID(a.sessionID),
+		llb.SharedKeyHint("context:" + a.nameWithPlatform),
+		llb.ExcludePatterns(a.excludes),
+	}, extraOpts...)
+
+	st := llb.Local(a.name, opts...)
+	a.Output = st.Output()
+}

vendor/github.com/moby/buildkit/frontend/gateway/grpcclient/client.go

@@ -43,8 +43,9 @@ type GrpcClient interface {
 }
 
 func New(ctx context.Context, opts map[string]string, session, product string, c pb.LLBBridgeClient, w []client.WorkerInfo) (GrpcClient, error) {
-	pingCtx, pingCancel := context.WithTimeout(ctx, 15*time.Second)
+	pingCtx, pingCancel := context.WithCancelCause(ctx)
-	defer pingCancel()
+	pingCtx, _ = context.WithTimeoutCause(pingCtx, 15*time.Second, errors.WithStack(context.DeadlineExceeded))
+	defer pingCancel(errors.WithStack(context.Canceled))
 	resp, err := c.Ping(pingCtx, &pb.PingRequest{})
 	if err != nil {
 		return nil, err
@@ -616,7 +617,7 @@ func (b *procMessageForwarder) Close() {
 type messageForwarder struct {
 	client pb.LLBBridgeClient
 	ctx    context.Context
-	cancel func()
+	cancel func(error)
 	eg     *errgroup.Group
 	mu     sync.Mutex
 	pids   map[string]*procMessageForwarder
@@ -630,7 +631,7 @@ type messageForwarder struct {
 }
 
 func newMessageForwarder(ctx context.Context, client pb.LLBBridgeClient) *messageForwarder {
-	ctx, cancel := context.WithCancel(ctx)
+	ctx, cancel := context.WithCancelCause(ctx)
 	eg, ctx := errgroup.WithContext(ctx)
 	return &messageForwarder{
 		client: client,
@@ -719,7 +720,7 @@ func (m *messageForwarder) Send(msg *pb.ExecMessage) error {
 }
 
 func (m *messageForwarder) Release() error {
-	m.cancel()
+	m.cancel(errors.WithStack(context.Canceled))
 	return m.eg.Wait()
 }
 
@@ -949,7 +950,7 @@ func (ctr *container) Start(ctx context.Context, req client.StartRequest) (clien
 				closeDoneOnce.Do(func() {
 					close(done)
 				})
-				return ctx.Err()
+				return context.Cause(ctx)
 			}
 
 			if file := msg.GetFile(); file != nil {
@@ -1145,7 +1146,7 @@ func grpcClientConn(ctx context.Context) (context.Context, *grpc.ClientConn, err
 		return nil, nil, errors.Wrap(err, "failed to create grpc client")
 	}
 
-	ctx, cancel := context.WithCancel(ctx)
+	ctx, cancel := context.WithCancelCause(ctx)
 	_ = cancel
 	// go monitorHealth(ctx, cc, cancel)
 

vendor/github.com/moby/buildkit/session/filesync/filesync.go

@@ -195,8 +195,8 @@ func FSSync(ctx context.Context, c session.Caller, opt FSSendRequestOpt) error {
 
 	opts[keyDirName] = []string{opt.Name}
 
-	ctx, cancel := context.WithCancel(ctx)
+	ctx, cancel := context.WithCancelCause(ctx)
-	defer cancel()
+	defer cancel(errors.WithStack(context.Canceled))
 
 	client := NewFileSyncClient(c.Conn())
 

vendor/github.com/moby/buildkit/session/group.go

@@ -72,8 +72,9 @@ func (sm *Manager) Any(ctx context.Context, g Group, f func(context.Context, str
 			return errors.Errorf("no active sessions")
 		}
 
-		timeoutCtx, cancel := context.WithTimeout(ctx, 5*time.Second)
+		timeoutCtx, cancel := context.WithCancelCause(ctx)
-		defer cancel()
+		timeoutCtx, _ = context.WithTimeoutCause(timeoutCtx, 5*time.Second, errors.WithStack(context.DeadlineExceeded))
+		defer cancel(errors.WithStack(context.Canceled))
 		c, err := sm.Get(timeoutCtx, id, false)
 		if err != nil {
 			lastErr = err

vendor/github.com/moby/buildkit/session/grpc.go

@@ -74,14 +74,14 @@ func grpcClientConn(ctx context.Context, conn net.Conn) (context.Context, *grpc.
 		return nil, nil, errors.Wrap(err, "failed to create grpc client")
 	}
 
-	ctx, cancel := context.WithCancel(ctx)
+	ctx, cancel := context.WithCancelCause(ctx)
 	go monitorHealth(ctx, cc, cancel)
 
 	return ctx, cc, nil
 }
 
-func monitorHealth(ctx context.Context, cc *grpc.ClientConn, cancelConn func()) {
+func monitorHealth(ctx context.Context, cc *grpc.ClientConn, cancelConn func(error)) {
-	defer cancelConn()
+	defer cancelConn(errors.WithStack(context.Canceled))
 	defer cc.Close()
 
 	ticker := time.NewTicker(5 * time.Second)
@@ -104,9 +104,11 @@ func monitorHealth(ctx context.Context, cc *grpc.ClientConn, cancelConn func())
 			healthcheckStart := time.Now()
 
 			timeout := time.Duration(math.Max(float64(defaultHealthcheckDuration), float64(lastHealthcheckDuration)*1.5))
-			ctx, cancel := context.WithTimeout(ctx, timeout)
+
+			ctx, cancel := context.WithCancelCause(ctx)
+			ctx, _ = context.WithTimeoutCause(ctx, timeout, errors.WithStack(context.DeadlineExceeded))
 			_, err := healthClient.Check(ctx, &grpc_health_v1.HealthCheckRequest{})
-			cancel()
+			cancel(errors.WithStack(context.Canceled))
 
 			lastHealthcheckDuration = time.Since(healthcheckStart)
 			logFields := logrus.Fields{

vendor/github.com/moby/buildkit/session/manager.go

@@ -99,8 +99,8 @@ func (sm *Manager) HandleConn(ctx context.Context, conn net.Conn, opts map[strin
 
 // caller needs to take lock, this function will release it
 func (sm *Manager) handleConn(ctx context.Context, conn net.Conn, opts map[string][]string) error {
-	ctx, cancel := context.WithCancel(ctx)
+	ctx, cancel := context.WithCancelCause(ctx)
-	defer cancel()
+	defer cancel(errors.WithStack(context.Canceled))
 
 	opts = canonicalHeaders(opts)
 
@@ -156,8 +156,8 @@ func (sm *Manager) Get(ctx context.Context, id string, noWait bool) (Caller, err
 		id = p[1]
 	}
 
-	ctx, cancel := context.WithCancel(ctx)
+	ctx, cancel := context.WithCancelCause(ctx)
-	defer cancel()
+	defer cancel(errors.WithStack(context.Canceled))
 
 	go func() {
 		<-ctx.Done()
@@ -173,7 +173,7 @@ func (sm *Manager) Get(ctx context.Context, id string, noWait bool) (Caller, err
 		select {
 		case <-ctx.Done():
 			sm.mu.Unlock()
-			return nil, errors.Wrapf(ctx.Err(), "no active session for %s", id)
+			return nil, errors.Wrapf(context.Cause(ctx), "no active session for %s", id)
 		default:
 		}
 		var ok bool

vendor/github.com/moby/buildkit/session/session.go

@@ -42,7 +42,7 @@ type Session struct {
 	name        string
 	sharedKey   string
 	ctx         context.Context
-	cancelCtx   func()
+	cancelCtx   func(error)
 	done        chan struct{}
 	grpcServer  *grpc.Server
 	conn        net.Conn
@@ -107,11 +107,11 @@ func (s *Session) Run(ctx context.Context, dialer Dialer) error {
 		s.mu.Unlock()
 		return nil
 	}
-	ctx, cancel := context.WithCancel(ctx)
+	ctx, cancel := context.WithCancelCause(ctx)
 	s.cancelCtx = cancel
 	s.done = make(chan struct{})
 
-	defer cancel()
+	defer cancel(errors.WithStack(context.Canceled))
 	defer close(s.done)
 
 	meta := make(map[string][]string)

vendor/github.com/moby/buildkit/session/sshforward/copy.go

@@ -39,7 +39,7 @@ func Copy(ctx context.Context, conn io.ReadWriteCloser, stream Stream, closeStre
 			select {
 			case <-ctx.Done():
 				conn.Close()
-				return ctx.Err()
+				return context.Cause(ctx)
 			default:
 			}
 			if _, err := conn.Write(p.Data); err != nil {
@@ -65,7 +65,7 @@ func Copy(ctx context.Context, conn io.ReadWriteCloser, stream Stream, closeStre
 			}
 			select {
 			case <-ctx.Done():
-				return ctx.Err()
+				return context.Cause(ctx)
 			default:
 			}
 			p := &BytesMessage{Data: buf[:n]}

vendor/github.com/moby/buildkit/session/sshforward/ssh.go

@@ -26,7 +26,7 @@ func (s *server) run(ctx context.Context, l net.Listener, id string) error {
 
 	eg.Go(func() error {
 		<-ctx.Done()
-		return ctx.Err()
+		return context.Cause(ctx)
 	})
 
 	eg.Go(func() error {

vendor/github.com/moby/buildkit/solver/errdefs/context.go

@@ -14,7 +14,7 @@ func IsCanceled(ctx context.Context, err error) bool {
 		return true
 	}
 	// grpc does not set cancel correctly when stream gets cancelled and then Recv is called
-	if err != nil && ctx.Err() == context.Canceled {
+	if err != nil && context.Cause(ctx) == context.Canceled {
 		// when this error comes from containerd it is not typed at all, just concatenated string
 		if strings.Contains(err.Error(), "EOF") {
 			return true

vendor/github.com/moby/buildkit/util/appcontext/appcontext.go

@@ -7,6 +7,7 @@ import (
 	"sync"
 
 	"github.com/moby/buildkit/util/bklog"
+	"github.com/pkg/errors"
 )
 
 var appContextCache context.Context
@@ -27,16 +28,17 @@ func Context() context.Context {
 			ctx = f(ctx)
 		}
 
-		ctx, cancel := context.WithCancel(ctx)
+		ctx, cancel := context.WithCancelCause(ctx)
 		appContextCache = ctx
 
 		go func() {
 			for {
 				<-signals
-				cancel()
 				retries++
+				err := errors.Errorf("got %d SIGTERM/SIGINTs, forcing shutdown", retries)
+				cancel(err)
 				if retries >= exitLimit {
-					bklog.G(ctx).Errorf("got %d SIGTERM/SIGINTs, forcing shutdown", retries)
+					bklog.G(ctx).Errorf(err.Error())
 					os.Exit(1)
 				}
 			}

vendor/github.com/moby/buildkit/util/flightcontrol/flightcontrol.go

@@ -90,7 +90,7 @@ type call[T any] struct {
 	fn   func(ctx context.Context) (T, error)
 	once sync.Once
 
-	closeProgressWriter func()
+	closeProgressWriter func(error)
 	progressState       *progressState
 	progressCtx         context.Context
 }
@@ -115,9 +115,9 @@ func newCall[T any](fn func(ctx context.Context) (T, error)) *call[T] {
 }
 
 func (c *call[T]) run() {
-	defer c.closeProgressWriter()
+	defer c.closeProgressWriter(errors.WithStack(context.Canceled))
-	ctx, cancel := context.WithCancel(c.ctx)
+	ctx, cancel := context.WithCancelCause(c.ctx)
-	defer cancel()
+	defer cancel(errors.WithStack(context.Canceled))
 	v, err := c.fn(ctx)
 	c.mu.Lock()
 	c.result = v
@@ -155,8 +155,8 @@ func (c *call[T]) wait(ctx context.Context) (v T, err error) {
 		c.progressState.add(pw)
 	}
 
-	ctx, cancel := context.WithCancel(ctx)
+	ctx, cancel := context.WithCancelCause(ctx)
-	defer cancel()
+	defer cancel(errors.WithStack(context.Canceled))
 
 	c.ctxs = append(c.ctxs, ctx)
 
@@ -175,7 +175,7 @@ func (c *call[T]) wait(ctx context.Context) (v T, err error) {
 		if ok {
 			c.progressState.close(pw)
 		}
-		return empty, ctx.Err()
+		return empty, context.Cause(ctx)
 	case <-c.ready:
 		return c.result, c.err // shared not implemented yet
 	}
@@ -262,7 +262,9 @@ func (sc *sharedContext[T]) checkDone() bool {
 	for _, ctx := range sc.ctxs {
 		select {
 		case <-ctx.Done():
-			err = ctx.Err()
+			// Cause can't be used here because this error is returned for Err() in custom context
+			// implementation and unfortunately stdlib does not allow defining Cause() for custom contexts
+			err = ctx.Err() //nolint: forbidigo
 		default:
 			sc.mu.Unlock()
 			return false

vendor/github.com/moby/buildkit/util/progress/multireader.go

@@ -11,14 +11,15 @@ type MultiReader struct {
 	main        Reader
 	initialized bool
 	done        chan struct{}
-	writers     map[*progressWriter]func()
+	doneCause   error
+	writers     map[*progressWriter]func(error)
 	sent        []*Progress
 }
 
 func NewMultiReader(pr Reader) *MultiReader {
 	mr := &MultiReader{
 		main:    pr,
-		writers: make(map[*progressWriter]func()),
+		writers: make(map[*progressWriter]func(error)),
 		done:    make(chan struct{}),
 	}
 	return mr
@@ -46,9 +47,9 @@ func (mr *MultiReader) Reader(ctx context.Context) Reader {
 
 	go func() {
 		if isBehind {
-			close := func() {
+			close := func(err error) {
 				w.Close()
-				closeWriter()
+				closeWriter(err)
 			}
 			i := 0
 			for {
@@ -58,11 +59,11 @@ func (mr *MultiReader) Reader(ctx context.Context) Reader {
 				if count == 0 {
 					select {
 					case <-ctx.Done():
-						close()
+						close(context.Cause(ctx))
 						mr.mu.Unlock()
 						return
 					case <-mr.done:
-						close()
+						close(mr.doneCause)
 						mr.mu.Unlock()
 						return
 					default:
@@ -77,7 +78,7 @@ func (mr *MultiReader) Reader(ctx context.Context) Reader {
 					if i%100 == 0 {
 						select {
 						case <-ctx.Done():
-							close()
+							close(context.Cause(ctx))
 							return
 						default:
 						}
@@ -110,10 +111,12 @@ func (mr *MultiReader) handle() error {
 		if err != nil {
 			if err == io.EOF {
 				mr.mu.Lock()
+				cancelErr := context.Canceled
 				for w, c := range mr.writers {
 					w.Close()
-					c()
+					c(cancelErr)
 				}
+				mr.doneCause = cancelErr
 				close(mr.done)
 				mr.mu.Unlock()
 				return nil

vendor/github.com/moby/buildkit/util/progress/progress.go

@@ -56,7 +56,7 @@ type WriterOption func(Writer)
 // NewContext returns a new context and a progress reader that captures all
 // progress items writtern to this context. Last returned parameter is a closer
 // function to signal that no new writes will happen to this context.
-func NewContext(ctx context.Context) (Reader, context.Context, func()) {
+func NewContext(ctx context.Context) (Reader, context.Context, func(error)) {
 	pr, pw, cancel := pipe()
 	ctx = WithProgress(ctx, pw)
 	return pr, ctx, cancel
@@ -141,7 +141,7 @@ func (pr *progressReader) Read(ctx context.Context) ([]*Progress, error) {
 		select {
 		case <-ctx.Done():
 			pr.mu.Unlock()
-			return nil, ctx.Err()
+			return nil, context.Cause(ctx)
 		default:
 		}
 		dmap := pr.dirty
@@ -185,8 +185,8 @@ func (pr *progressReader) append(pw *progressWriter) {
 	}
 }
 
-func pipe() (*progressReader, *progressWriter, func()) {
+func pipe() (*progressReader, *progressWriter, func(error)) {
-	ctx, cancel := context.WithCancel(context.Background())
+	ctx, cancel := context.WithCancelCause(context.Background())
 	pr := &progressReader{
 		ctx:     ctx,
 		writers: make(map[*progressWriter]struct{}),

vendor/github.com/moby/buildkit/util/progress/progressui/display.go

@@ -99,7 +99,7 @@ func (d Display) UpdateFrom(ctx context.Context, ch chan *client.SolveStatus) ([
 	for {
 		select {
 		case <-ctx.Done():
-			return nil, ctx.Err()
+			return nil, context.Cause(ctx)
 		case <-ticker.C:
 			d.disp.refresh()
 		case ss, ok := <-ch:

vendor/github.com/moby/buildkit/util/testutil/integration/registry.go

@@ -67,8 +67,9 @@ http:
 	}
 	deferF.Append(stop)
 
-	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+	ctx, cancel := context.WithCancelCause(context.Background())
-	defer cancel()
+	ctx, _ = context.WithTimeoutCause(ctx, 5*time.Second, errors.WithStack(context.DeadlineExceeded))
+	defer cancel(errors.WithStack(context.Canceled))
 	url, err = detectPort(ctx, rc)
 	if err != nil {
 		return "", nil, err

vendor/github.com/moby/buildkit/util/testutil/integration/run.go

@@ -423,3 +423,10 @@ func prepareValueMatrix(tc testConf) []matrixValue {
 	}
 	return m
 }
+
+// Skips tests on Windows
+func SkipOnPlatform(t *testing.T, goos string) {
+	if runtime.GOOS == goos {
+		t.Skipf("Skipped on %s", goos)
+	}
+}

vendor/github.com/moby/buildkit/util/testutil/integration/sandbox.go

@@ -99,7 +99,7 @@ func newSandbox(ctx context.Context, w Worker, mirror string, mv matrixValue) (s
 
 	b, closer, err := w.New(ctx, cfg)
 	if err != nil {
-		return nil, nil, err
+		return nil, nil, errors.Wrap(err, "creating worker")
 	}
 	deferF.Append(closer)
 

vendor/github.com/moby/buildkit/util/testutil/integration/util.go

@@ -5,7 +5,6 @@ import (
 	"context"
 	"fmt"
 	"io"
-	"net"
 	"os"
 	"os/exec"
 	"strings"
@@ -100,13 +99,11 @@ func StartCmd(cmd *exec.Cmd, logs map[string]*bytes.Buffer) (func() error, error
 	}, nil
 }
 
-func WaitUnix(address string, d time.Duration, cmd *exec.Cmd) error {
+// WaitSocket will dial a socket opened by a command passed in as cmd.
-	address = strings.TrimPrefix(address, "unix://")
+// On Linux this socket is typically a Unix socket,
-	addr, err := net.ResolveUnixAddr("unix", address)
+// while on Windows this will be a named pipe.
-	if err != nil {
+func WaitSocket(address string, d time.Duration, cmd *exec.Cmd) error {
-		return errors.Wrapf(err, "failed resolving unix addr: %s", address)
+	address = strings.TrimPrefix(address, socketScheme)
-	}
-
 	step := 50 * time.Millisecond
 	i := 0
 	for {
@@ -114,7 +111,7 @@ func WaitUnix(address string, d time.Duration, cmd *exec.Cmd) error {
 			return errors.Errorf("process exited: %s", cmd.String())
 		}
 
-		if conn, err := net.DialUnix("unix", nil, addr); err == nil {
+		if conn, err := dialPipe(address); err == nil {
 			conn.Close()
 			break
 		}

vendor/github.com/moby/buildkit/util/testutil/integration/util_unix.go

@@ -0,0 +1,23 @@
+//go:build !windows
+// +build !windows
+
+package integration
+
+import (
+	"net"
+
+	"github.com/pkg/errors"
+)
+
+var socketScheme = "unix://"
+
+// abstracted function to handle pipe dialing on unix.
+// some simplification has been made to discard
+// laddr for unix -- left as nil.
+func dialPipe(address string) (net.Conn, error) {
+	addr, err := net.ResolveUnixAddr("unix", address)
+	if err != nil {
+		return nil, errors.Wrapf(err, "failed resolving unix addr: %s", address)
+	}
+	return net.DialUnix("unix", nil, addr)
+}

vendor/github.com/moby/buildkit/util/testutil/integration/util_windows.go

@@ -0,0 +1,15 @@
+package integration
+
+import (
+	"net"
+
+	"github.com/Microsoft/go-winio"
+)
+
+var socketScheme = "npipe://"
+
+// abstracted function to handle pipe dialing on windows.
+// some simplification has been made to discard timeout param.
+func dialPipe(address string) (net.Conn, error) {
+	return winio.DialPipe(address, nil)
+}

vendor/github.com/moby/buildkit/util/testutil/workers/containerd.go

@@ -88,9 +88,11 @@ func (c *Containerd) New(ctx context.Context, cfg *integration.BackendConfig) (b
 	if err := integration.LookupBinary(c.Containerd); err != nil {
 		return nil, nil, err
 	}
+
 	if err := integration.LookupBinary("buildkitd"); err != nil {
 		return nil, nil, err
 	}
+
 	if err := requireRoot(); err != nil {
 		return nil, nil, err
 	}
@@ -117,6 +119,7 @@ func (c *Containerd) New(ctx context.Context, cfg *integration.BackendConfig) (b
 	if err != nil {
 		return nil, nil, err
 	}
+
 	if rootless {
 		if err := os.Chown(tmpdir, c.UID, c.GID); err != nil {
 			return nil, nil, err
@@ -125,7 +128,7 @@ func (c *Containerd) New(ctx context.Context, cfg *integration.BackendConfig) (b
 
 	deferF.Append(func() error { return os.RemoveAll(tmpdir) })
 
-	address := filepath.Join(tmpdir, "containerd.sock")
+	address := getContainerdSock(tmpdir)
 	config := fmt.Sprintf(`root = %q
 state = %q
 # CRI plugins listens on 10010/tcp for stream server.
@@ -137,8 +140,11 @@ disabled_plugins = ["cri"]
 
 [debug]
   level = "debug"
-  address = %q
+  address = %q`,
-`, filepath.Join(tmpdir, "root"), filepath.Join(tmpdir, "state"), address, filepath.Join(tmpdir, "debug.sock"))
+		filepath.Join(tmpdir, "root"),
+		filepath.Join(tmpdir, "state"),
+		address, getContainerdDebugSock(tmpdir),
+	)
 
 	var snBuildkitdArgs []string
 	if c.Snapshotter != "" {
@@ -185,19 +191,23 @@ disabled_plugins = ["cri"]
 	if err != nil {
 		return nil, nil, err
 	}
-	if err := integration.WaitUnix(address, 10*time.Second, cmd); err != nil {
+	if err := integration.WaitSocket(address, 10*time.Second, cmd); err != nil {
 		ctdStop()
 		return nil, nil, errors.Wrapf(err, "containerd did not start up: %s", integration.FormatLogs(cfg.Logs))
 	}
 	deferF.Append(ctdStop)
 
-	buildkitdArgs := append([]string{"buildkitd",
+	// handles only windows case, no effect on unix
-		"--oci-worker=false",
+	address = normalizeAddress(address)
+	buildkitdArgs := []string{
+		"buildkitd",
 		"--containerd-worker-gc=false",
 		"--containerd-worker=true",
 		"--containerd-worker-addr", address,
 		"--containerd-worker-labels=org.mobyproject.buildkit.worker.sandbox=true", // Include use of --containerd-worker-labels to trigger https://github.com/moby/buildkit/pull/603
-	}, snBuildkitdArgs...)
+	}
+	buildkitdArgs = applyBuildkitdPlatformFlags(buildkitdArgs)
+	buildkitdArgs = append(buildkitdArgs, snBuildkitdArgs...)
 
 	if runtime.GOOS != "windows" && c.Snapshotter != "native" {
 		c.ExtraEnv = append(c.ExtraEnv, "BUILDKIT_DEBUG_FORCE_OVERLAY_DIFF=true")
@@ -266,7 +276,7 @@ func runStargzSnapshotter(cfg *integration.BackendConfig) (address string, cl fu
 	if err != nil {
 		return "", nil, err
 	}
-	if err = integration.WaitUnix(address, 10*time.Second, cmd); err != nil {
+	if err = integration.WaitSocket(address, 10*time.Second, cmd); err != nil {
 		snStop()
 		return "", nil, errors.Wrapf(err, "containerd-stargz-grpc did not start up: %s", integration.FormatLogs(cfg.Logs))
 	}

vendor/github.com/moby/buildkit/util/testutil/workers/dockerd.go

@@ -159,7 +159,7 @@ func (c Moby) New(ctx context.Context, cfg *integration.BackendConfig) (b integr
 	}
 	deferF.Append(d.StopWithError)
 
-	if err := integration.WaitUnix(d.Sock(), 5*time.Second, nil); err != nil {
+	if err := integration.WaitSocket(d.Sock(), 5*time.Second, nil); err != nil {
 		return nil, nil, errors.Errorf("dockerd did not start up: %q, %s", err, integration.FormatLogs(cfg.Logs))
 	}
 

vendor/github.com/moby/buildkit/util/testutil/workers/oci.go

@@ -4,31 +4,18 @@ import (
 	"context"
 	"fmt"
 	"log"
-	"os"
 	"runtime"
 
-	"github.com/moby/buildkit/util/bklog"
 	"github.com/moby/buildkit/util/testutil/integration"
 	"github.com/pkg/errors"
 )
 
+// InitOCIWorker registers an integration test worker, which enables the --oci-worker
+// flag in the test buildkitd instance and disables the --containerd-worker flag. This
+// integration test worker is not supported on Windows.
 func InitOCIWorker() {
-	integration.Register(&OCI{ID: "oci"})
+	// calling platform specific
-
+	initOCIWorker()
-	// the rootless uid is defined in Dockerfile
-	if s := os.Getenv("BUILDKIT_INTEGRATION_ROOTLESS_IDPAIR"); s != "" {
-		var uid, gid int
-		if _, err := fmt.Sscanf(s, "%d:%d", &uid, &gid); err != nil {
-			bklog.L.Fatalf("unexpected BUILDKIT_INTEGRATION_ROOTLESS_IDPAIR: %q", s)
-		}
-		if integration.RootlessSupported(uid) {
-			integration.Register(&OCI{ID: "oci-rootless", UID: uid, GID: gid})
-		}
-	}
-
-	if s := os.Getenv("BUILDKIT_INTEGRATION_SNAPSHOTTER"); s != "" {
-		integration.Register(&OCI{ID: "oci-snapshotter-" + s, Snapshotter: s})
-	}
 }
 
 type OCI struct {

vendor/github.com/moby/buildkit/util/testutil/workers/oci_unix.go

@@ -0,0 +1,31 @@
+//go:build !windows
+// +build !windows
+
+package workers
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/moby/buildkit/util/bklog"
+	"github.com/moby/buildkit/util/testutil/integration"
+)
+
+func initOCIWorker() {
+	integration.Register(&OCI{ID: "oci"})
+
+	// the rootless uid is defined in Dockerfile
+	if s := os.Getenv("BUILDKIT_INTEGRATION_ROOTLESS_IDPAIR"); s != "" {
+		var uid, gid int
+		if _, err := fmt.Sscanf(s, "%d:%d", &uid, &gid); err != nil {
+			bklog.L.Fatalf("unexpected BUILDKIT_INTEGRATION_ROOTLESS_IDPAIR: %q", s)
+		}
+		if integration.RootlessSupported(uid) {
+			integration.Register(&OCI{ID: "oci-rootless", UID: uid, GID: gid})
+		}
+	}
+
+	if s := os.Getenv("BUILDKIT_INTEGRATION_SNAPSHOTTER"); s != "" {
+		integration.Register(&OCI{ID: "oci-snapshotter-" + s, Snapshotter: s})
+	}
+}

vendor/github.com/moby/buildkit/util/testutil/workers/oci_windows.go

@@ -0,0 +1,7 @@
+package workers
+
+import "github.com/moby/buildkit/util/bklog"
+
+func initOCIWorker() {
+	bklog.L.Info("OCI Worker not supported on Windows.")
+}

vendor/github.com/moby/buildkit/util/testutil/workers/sysprocattr_unix.go

@@ -1,23 +0,0 @@
-//go:build !windows
-// +build !windows
-
-package workers
-
-import (
-	"path/filepath"
-	"syscall"
-)
-
-func getSysProcAttr() *syscall.SysProcAttr {
-	return &syscall.SysProcAttr{
-		Setsid: true, // stretch sudo needs this for sigterm
-	}
-}
-
-func getBuildkitdAddr(tmpdir string) string {
-	return "unix://" + filepath.Join(tmpdir, "buildkitd.sock")
-}
-
-func getTraceSocketPath(tmpdir string) string {
-	return filepath.Join(tmpdir, "otel-grpc.sock")
-}

vendor/github.com/moby/buildkit/util/testutil/workers/sysprocattr_windows.go

@@ -1,21 +0,0 @@
-//go:build windows
-// +build windows
-
-package workers
-
-import (
-	"path/filepath"
-	"syscall"
-)
-
-func getSysProcAttr() *syscall.SysProcAttr {
-	return &syscall.SysProcAttr{}
-}
-
-func getBuildkitdAddr(tmpdir string) string {
-	return "//./pipe/buildkitd-" + filepath.Base(tmpdir)
-}
-
-func getTraceSocketPath(tmpdir string) string {
-	return `\\.\pipe\buildkit-otel-grpc-` + filepath.Base(tmpdir)
-}

vendor/github.com/moby/buildkit/util/testutil/workers/util.go

@@ -1,98 +1,17 @@
 package workers
 
 import (
-	"bufio"
 	"bytes"
 	"context"
 	"fmt"
 	"os"
 	"os/exec"
 	"path/filepath"
-	"strings"
 	"time"
 
 	"github.com/moby/buildkit/util/testutil/integration"
-	"github.com/pkg/errors"
 )
 
-func requireRoot() error {
-	if os.Getuid() != 0 {
-		return errors.Wrap(integration.ErrRequirements, "requires root")
-	}
-	return nil
-}
-
-func runBuildkitd(ctx context.Context, conf *integration.BackendConfig, args []string, logs map[string]*bytes.Buffer, uid, gid int, extraEnv []string) (address string, cl func() error, err error) {
-	deferF := &integration.MultiCloser{}
-	cl = deferF.F()
-
-	defer func() {
-		if err != nil {
-			deferF.F()()
-			cl = nil
-		}
-	}()
-
-	tmpdir, err := os.MkdirTemp("", "bktest_buildkitd")
-	if err != nil {
-		return "", nil, err
-	}
-	if err := os.Chown(tmpdir, uid, gid); err != nil {
-		return "", nil, err
-	}
-	if err := os.MkdirAll(filepath.Join(tmpdir, "tmp"), 0711); err != nil {
-		return "", nil, err
-	}
-	if err := os.Chown(filepath.Join(tmpdir, "tmp"), uid, gid); err != nil {
-		return "", nil, err
-	}
-	deferF.Append(func() error { return os.RemoveAll(tmpdir) })
-
-	cfgfile, err := integration.WriteConfig(append(conf.DaemonConfig, withOTELSocketPath(getTraceSocketPath(tmpdir))))
-	if err != nil {
-		return "", nil, err
-	}
-	deferF.Append(func() error {
-		return os.RemoveAll(filepath.Dir(cfgfile))
-	})
-	args = append(args, "--config="+cfgfile)
-
-	address = getBuildkitdAddr(tmpdir)
-
-	args = append(args, "--root", tmpdir, "--addr", address, "--debug")
-	cmd := exec.Command(args[0], args[1:]...) //nolint:gosec // test utility
-	cmd.Env = append(os.Environ(), "BUILDKIT_DEBUG_EXEC_OUTPUT=1", "BUILDKIT_DEBUG_PANIC_ON_ERROR=1", "TMPDIR="+filepath.Join(tmpdir, "tmp"))
-	cmd.Env = append(cmd.Env, extraEnv...)
-	cmd.SysProcAttr = getSysProcAttr()
-
-	stop, err := integration.StartCmd(cmd, logs)
-	if err != nil {
-		return "", nil, err
-	}
-	deferF.Append(stop)
-
-	if err := integration.WaitUnix(address, 15*time.Second, cmd); err != nil {
-		return "", nil, err
-	}
-
-	deferF.Append(func() error {
-		f, err := os.Open("/proc/self/mountinfo")
-		if err != nil {
-			return errors.Wrap(err, "failed to open mountinfo")
-		}
-		defer f.Close()
-		s := bufio.NewScanner(f)
-		for s.Scan() {
-			if strings.Contains(s.Text(), tmpdir) {
-				return errors.Errorf("leaked mountpoint for %s", tmpdir)
-			}
-		}
-		return s.Err()
-	})
-
-	return address, cl, err
-}
-
 func withOTELSocketPath(socketPath string) integration.ConfigUpdater {
 	return otelSocketPath(socketPath)
 }
@@ -106,3 +25,79 @@ func (osp otelSocketPath) UpdateConfigFile(in string) string {
   socketPath = %q
 `, in, osp)
 }
+
+func runBuildkitd(
+	ctx context.Context,
+	conf *integration.BackendConfig,
+	args []string,
+	logs map[string]*bytes.Buffer,
+	uid, gid int,
+	extraEnv []string,
+) (address string, cl func() error, err error) {
+	deferF := &integration.MultiCloser{}
+	cl = deferF.F()
+
+	defer func() {
+		if err != nil {
+			deferF.F()()
+			cl = nil
+		}
+	}()
+
+	tmpdir, err := os.MkdirTemp("", "bktest_buildkitd")
+	if err != nil {
+		return "", nil, err
+	}
+
+	if err := chown(tmpdir, uid, gid); err != nil {
+		return "", nil, err
+	}
+
+	if err := os.MkdirAll(filepath.Join(tmpdir, "tmp"), 0711); err != nil {
+		return "", nil, err
+	}
+
+	if err := chown(filepath.Join(tmpdir, "tmp"), uid, gid); err != nil {
+		return "", nil, err
+	}
+	deferF.Append(func() error { return os.RemoveAll(tmpdir) })
+
+	cfgfile, err := integration.WriteConfig(
+		append(conf.DaemonConfig, withOTELSocketPath(getTraceSocketPath(tmpdir))))
+	if err != nil {
+		return "", nil, err
+	}
+	deferF.Append(func() error {
+		return os.RemoveAll(filepath.Dir(cfgfile))
+	})
+
+	args = append(args, "--config="+cfgfile)
+	address = getBuildkitdAddr(tmpdir)
+
+	args = append(args, "--root", tmpdir, "--addr", address, "--debug")
+	cmd := exec.Command(args[0], args[1:]...) //nolint:gosec // test utility
+	cmd.Env = append(
+		os.Environ(),
+		"BUILDKIT_DEBUG_EXEC_OUTPUT=1",
+		"BUILDKIT_DEBUG_PANIC_ON_ERROR=1",
+		"TMPDIR="+filepath.Join(tmpdir, "tmp"))
+	cmd.Env = append(cmd.Env, extraEnv...)
+	cmd.SysProcAttr = getSysProcAttr()
+
+	stop, err := integration.StartCmd(cmd, logs)
+	if err != nil {
+		return "", nil, err
+	}
+	deferF.Append(stop)
+
+	if err := integration.WaitSocket(address, 15*time.Second, cmd); err != nil {
+		return "", nil, err
+	}
+
+	// separated out since it's not required in windows
+	deferF.Append(func() error {
+		return mountInfo(tmpdir)
+	})
+
+	return address, cl, err
+}

vendor/github.com/moby/buildkit/util/testutil/workers/util_unix.go

@@ -0,0 +1,74 @@
+//go:build !windows
+// +build !windows
+
+package workers
+
+import (
+	"bufio"
+	"os"
+	"path/filepath"
+	"strings"
+	"syscall"
+
+	"github.com/moby/buildkit/util/testutil/integration"
+	"github.com/pkg/errors"
+)
+
+func applyBuildkitdPlatformFlags(args []string) []string {
+	return append(args, "--oci-worker=false")
+}
+
+func requireRoot() error {
+	if os.Getuid() != 0 {
+		return errors.Wrap(integration.ErrRequirements, "requires root")
+	}
+	return nil
+}
+
+func getSysProcAttr() *syscall.SysProcAttr {
+	return &syscall.SysProcAttr{
+		Setsid: true, // stretch sudo needs this for sigterm
+	}
+}
+
+func getBuildkitdAddr(tmpdir string) string {
+	return "unix://" + filepath.Join(tmpdir, "buildkitd.sock")
+}
+
+func getTraceSocketPath(tmpdir string) string {
+	return filepath.Join(tmpdir, "otel-grpc.sock")
+}
+
+func getContainerdSock(tmpdir string) string {
+	return filepath.Join(tmpdir, "containerd.sock")
+}
+
+func getContainerdDebugSock(tmpdir string) string {
+	return filepath.Join(tmpdir, "debug.sock")
+}
+
+func mountInfo(tmpdir string) error {
+	f, err := os.Open("/proc/self/mountinfo")
+	if err != nil {
+		return errors.Wrap(err, "failed to open mountinfo")
+	}
+	defer f.Close()
+	s := bufio.NewScanner(f)
+	for s.Scan() {
+		if strings.Contains(s.Text(), tmpdir) {
+			return errors.Errorf("leaked mountpoint for %s", tmpdir)
+		}
+	}
+	return s.Err()
+}
+
+// moved here since os.Chown is not supported on Windows.
+// see no-op counterpart in util_windows.go
+func chown(name string, uid, gid int) error {
+	return os.Chown(name, uid, gid)
+}
+
+func normalizeAddress(address string) string {
+	// for parity with windows, no effect for unix
+	return address
+}

vendor/github.com/moby/buildkit/util/testutil/workers/util_windows.go

@@ -0,0 +1,53 @@
+package workers
+
+import (
+	"path/filepath"
+	"strings"
+	"syscall"
+)
+
+func applyBuildkitdPlatformFlags(args []string) []string {
+	return args
+}
+
+func requireRoot() error {
+	return nil
+}
+
+func getSysProcAttr() *syscall.SysProcAttr {
+	return &syscall.SysProcAttr{}
+}
+
+func getBuildkitdAddr(tmpdir string) string {
+	return "npipe:////./pipe/buildkitd-" + filepath.Base(tmpdir)
+}
+
+func getTraceSocketPath(tmpdir string) string {
+	return `\\.\pipe\buildkit-otel-grpc-` + filepath.Base(tmpdir)
+}
+
+func getContainerdSock(tmpdir string) string {
+	return `\\.\pipe\containerd-` + filepath.Base(tmpdir)
+}
+
+func getContainerdDebugSock(tmpdir string) string {
+	return `\\.\pipe\containerd-` + filepath.Base(tmpdir) + `debug`
+}
+
+// no-op for parity with unix
+func mountInfo(tmpdir string) error {
+	return nil
+}
+
+func chown(name string, uid, gid int) error {
+	// Chown not supported on Windows
+	return nil
+}
+
+func normalizeAddress(address string) string {
+	address = filepath.ToSlash(address)
+	if !strings.HasPrefix(address, "npipe://") {
+		address = "npipe://" + address
+	}
+	return address
+}

vendor/github.com/moby/buildkit/util/tracing/detect/delegated/delegated.go

@@ -5,6 +5,7 @@ import (
 	"sync"
 
 	"github.com/moby/buildkit/util/tracing/detect"
+	sdkmetric "go.opentelemetry.io/otel/sdk/metric"
 	sdktrace "go.opentelemetry.io/otel/sdk/trace"
 )
 
@@ -13,8 +14,8 @@ const maxBuffer = 256
 var exp = &Exporter{}
 
 func init() {
-	detect.Register("delegated", func() (sdktrace.SpanExporter, error) {
+	detect.Register("delegated", func() (sdktrace.SpanExporter, sdkmetric.Exporter, error) {
-		return exp, nil
+		return exp, nil, nil
 	}, 100)
 }
 

vendor/github.com/moby/buildkit/util/tracing/detect/detect.go

@@ -10,13 +10,16 @@ import (
 
 	"github.com/moby/buildkit/util/bklog"
 	"github.com/pkg/errors"
+	"go.opentelemetry.io/otel/exporters/prometheus"
+	"go.opentelemetry.io/otel/metric"
+	sdkmetric "go.opentelemetry.io/otel/sdk/metric"
 	"go.opentelemetry.io/otel/sdk/resource"
 	sdktrace "go.opentelemetry.io/otel/sdk/trace"
 	semconv "go.opentelemetry.io/otel/semconv/v1.21.0"
 	"go.opentelemetry.io/otel/trace"
 )
 
-type ExporterDetector func() (sdktrace.SpanExporter, error)
+type ExporterDetector func() (sdktrace.SpanExporter, sdkmetric.Exporter, error)
 
 type detector struct {
 	f        ExporterDetector
@@ -26,10 +29,16 @@ type detector struct {
 var ServiceName string
 var Recorder *TraceRecorder
 
+var Resource *resource.Resource
+
 var detectors map[string]detector
 var once sync.Once
 var tp trace.TracerProvider
-var exporter sdktrace.SpanExporter
+var mp metric.MeterProvider
+var exporter struct {
+	SpanExporter   sdktrace.SpanExporter
+	MetricExporter sdkmetric.Exporter
+}
 var closers []func(context.Context) error
 var err error
 
@@ -43,14 +52,14 @@ func Register(name string, exp ExporterDetector, priority int) {
 	}
 }
 
-func detectExporter() (sdktrace.SpanExporter, error) {
+func detectExporter() (texp sdktrace.SpanExporter, mexp sdkmetric.Exporter, err error) {
 	if n := os.Getenv("OTEL_TRACES_EXPORTER"); n != "" {
 		d, ok := detectors[n]
 		if !ok {
 			if n == "none" {
-				return nil, nil
+				return nil, nil, nil
 			}
-			return nil, errors.Errorf("unsupported opentelemetry tracer %v", n)
+			return nil, nil, errors.Errorf("unsupported opentelemetry tracer %v", n)
 		}
 		return d.f()
 	}
@@ -61,84 +70,145 @@ func detectExporter() (sdktrace.SpanExporter, error) {
 	sort.Slice(arr, func(i, j int) bool {
 		return arr[i].priority < arr[j].priority
 	})
+
 	for _, d := range arr {
-		exp, err := d.f()
+		t, m, err := d.f()
 		if err != nil {
-			return nil, err
+			return nil, nil, err
 		}
-		if exp != nil {
+		if texp == nil {
-			return exp, nil
+			texp = t
+		}
+		if mexp == nil {
+			mexp = m
+		}
+
+		// Found a candidate for both exporters so just return now.
+		if texp != nil && mexp != nil {
+			return texp, mexp, nil
 		}
 	}
-	return nil, nil
+	return texp, mexp, nil
 }
 
-func getExporter() (sdktrace.SpanExporter, error) {
+func getExporters() (sdktrace.SpanExporter, sdkmetric.Exporter, error) {
-	exp, err := detectExporter()
+	texp, mexp, err := detectExporter()
 	if err != nil {
-		return nil, err
+		return nil, nil, err
 	}
 
 	if Recorder != nil {
-		Recorder.SpanExporter = exp
+		Recorder.SpanExporter = texp
-		exp = Recorder
+		texp = Recorder
 	}
-	return exp, nil
+
+	return texp, mexp, nil
 }
 
 func detect() error {
 	tp = trace.NewNoopTracerProvider()
+	mp = sdkmetric.NewMeterProvider()
 
-	exp, err := getExporter()
+	texp, mexp, err := getExporters()
-	if err != nil || exp == nil {
+	if err != nil || (texp == nil && mexp == nil) {
 		return err
 	}
 
+	if Resource == nil {
+		res, err := resource.Detect(context.Background(), serviceNameDetector{})
+		if err != nil {
+			return err
+		}
+		res, err = resource.Merge(resource.Default(), res)
+		if err != nil {
+			return err
+		}
+		Resource = res
+	}
+
 	// enable log with traceID when valid exporter
-	bklog.EnableLogWithTraceID(true)
+	if texp != nil {
+		bklog.EnableLogWithTraceID(true)
 
-	res, err := resource.Detect(context.Background(), serviceNameDetector{})
+		sp := sdktrace.NewBatchSpanProcessor(texp)
-	if err != nil {
+
-		return err
+		if Recorder != nil {
-	}
+			Recorder.flush = sp.ForceFlush
-	res, err = resource.Merge(resource.Default(), res)
+		}
-	if err != nil {
+
-		return err
+		sdktp := sdktrace.NewTracerProvider(
+			sdktrace.WithSpanProcessor(sp),
+			sdktrace.WithResource(Resource),
+		)
+		closers = append(closers, sdktp.Shutdown)
+
+		exporter.SpanExporter = texp
+		tp = sdktp
 	}
 
-	sp := sdktrace.NewBatchSpanProcessor(exp)
+	var readers []sdkmetric.Reader
-
+	if mexp != nil {
-	if Recorder != nil {
+		// Create a new periodic reader using any configured metric exporter.
-		Recorder.flush = sp.ForceFlush
+		readers = append(readers, sdkmetric.NewPeriodicReader(mexp))
 	}
 
-	sdktp := sdktrace.NewTracerProvider(sdktrace.WithSpanProcessor(sp), sdktrace.WithResource(res))
+	if r, err := prometheus.New(); err != nil {
-	closers = append(closers, sdktp.Shutdown)
+		// Log the error but do not fail if we could not configure the prometheus metrics.
+		bklog.G(context.Background()).
+			WithError(err).
+			Error("failed prometheus metrics configuration")
+	} else {
+		// Register the prometheus reader if there was no error.
+		readers = append(readers, r)
+	}
 
-	exporter = exp
+	if len(readers) > 0 {
-	tp = sdktp
+		opts := make([]sdkmetric.Option, 0, len(readers)+1)
+		opts = append(opts, sdkmetric.WithResource(Resource))
+		for _, r := range readers {
+			opts = append(opts, sdkmetric.WithReader(r))
+		}
+		sdkmp := sdkmetric.NewMeterProvider(opts...)
+		closers = append(closers, sdkmp.Shutdown)
+
+		exporter.MetricExporter = mexp
+		mp = sdkmp
+	}
 	return nil
 }
 
 func TracerProvider() (trace.TracerProvider, error) {
-	once.Do(func() {
+	if err := detectOnce(); err != nil {
-		if err1 := detect(); err1 != nil {
-			err = err1
-		}
-	})
-	b, _ := strconv.ParseBool(os.Getenv("OTEL_IGNORE_ERROR"))
-	if err != nil && !b {
 		return nil, err
 	}
 	return tp, nil
 }
 
-func Exporter() (sdktrace.SpanExporter, error) {
+func MeterProvider() (metric.MeterProvider, error) {
-	_, err := TracerProvider()
+	if err := detectOnce(); err != nil {
-	if err != nil {
 		return nil, err
 	}
-	return exporter, nil
+	return mp, nil
+}
+
+func detectOnce() error {
+	once.Do(func() {
+		if err1 := detect(); err1 != nil {
+			b, _ := strconv.ParseBool(os.Getenv("OTEL_IGNORE_ERROR"))
+			if !b {
+				err = err1
+			}
+		}
+	})
+	return err
+}
+
+func Exporter() (sdktrace.SpanExporter, sdkmetric.Exporter, error) {
+	_, err := TracerProvider()
+	if err != nil {
+		return nil, nil, err
+	}
+	return exporter.SpanExporter, exporter.MetricExporter, nil
 }
 
 func Shutdown(ctx context.Context) error {

vendor/github.com/moby/buildkit/util/tracing/detect/otlp.go

@@ -5,9 +5,13 @@ import (
 	"os"
 
 	"github.com/pkg/errors"
+	"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc"
+	"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp"
 	"go.opentelemetry.io/otel/exporters/otlp/otlptrace"
 	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc"
 	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp"
+	sdkmetric "go.opentelemetry.io/otel/sdk/metric"
+	"go.opentelemetry.io/otel/sdk/metric/metricdata"
 	sdktrace "go.opentelemetry.io/otel/sdk/trace"
 )
 
@@ -15,7 +19,20 @@ func init() {
 	Register("otlp", otlpExporter, 10)
 }
 
-func otlpExporter() (sdktrace.SpanExporter, error) {
+func otlpExporter() (sdktrace.SpanExporter, sdkmetric.Exporter, error) {
+	texp, err := otlpSpanExporter()
+	if err != nil {
+		return nil, nil, err
+	}
+
+	mexp, err := otlpMetricExporter()
+	if err != nil {
+		return nil, nil, err
+	}
+	return texp, mexp, nil
+}
+
+func otlpSpanExporter() (sdktrace.SpanExporter, error) {
 	set := os.Getenv("OTEL_TRACES_EXPORTER") == "otlp" || os.Getenv("OTEL_EXPORTER_OTLP_ENDPOINT") != "" || os.Getenv("OTEL_EXPORTER_OTLP_TRACES_ENDPOINT") != ""
 	if !set {
 		return nil, nil
@@ -43,3 +60,36 @@ func otlpExporter() (sdktrace.SpanExporter, error) {
 
 	return otlptrace.New(context.Background(), c)
 }
+
+func otlpMetricExporter() (sdkmetric.Exporter, error) {
+	set := os.Getenv("OTEL_METRICS_EXPORTER") == "otlp" || os.Getenv("OTEL_EXPORTER_OTLP_ENDPOINT") != "" || os.Getenv("OTEL_EXPORTER_OTLP_METRICS_ENDPOINT") != ""
+	if !set {
+		return nil, nil
+	}
+
+	proto := os.Getenv("OTEL_EXPORTER_OTLP_METRICS_PROTOCOL")
+	if proto == "" {
+		proto = os.Getenv("OTEL_EXPORTER_OTLP_PROTOCOL")
+	}
+	if proto == "" {
+		proto = "grpc"
+	}
+
+	switch proto {
+	case "grpc":
+		return otlpmetricgrpc.New(context.Background(),
+			otlpmetricgrpc.WithTemporalitySelector(deltaTemporality),
+		)
+	case "http/protobuf":
+		return otlpmetrichttp.New(context.Background(),
+			otlpmetrichttp.WithTemporalitySelector(deltaTemporality),
+		)
+	// case "http/json": // unsupported by library
+	default:
+		return nil, errors.Errorf("unsupported otlp protocol %v", proto)
+	}
+}
+
+func deltaTemporality(_ sdkmetric.InstrumentKind) metricdata.Temporality {
+	return metricdata.DeltaTemporality
+}

vendor/github.com/moby/buildkit/util/tracing/otlptracegrpc/client.go

@@ -70,9 +70,10 @@ func (c *client) UploadTraces(ctx context.Context, protoSpans []*tracepb.Resourc
 	}
 
 	ctx, cancel := c.connection.ContextWithStop(ctx)
-	defer cancel()
+	defer cancel(errors.WithStack(context.Canceled))
-	ctx, tCancel := context.WithTimeout(ctx, 30*time.Second)
+	ctx, tCancel := context.WithCancelCause(ctx)
-	defer tCancel()
+	ctx, _ = context.WithTimeoutCause(ctx, 30*time.Second, errors.WithStack(context.DeadlineExceeded))
+	defer tCancel(errors.WithStack(context.Canceled))
 
 	ctx = c.connection.ContextWithMetadata(ctx)
 	err := func() error {

vendor/github.com/moby/buildkit/util/tracing/otlptracegrpc/connection.go

@@ -22,6 +22,7 @@ import (
 	"time"
 	"unsafe"
 
+	"github.com/pkg/errors"
 	"google.golang.org/grpc"
 	"google.golang.org/grpc/metadata"
 )
@@ -185,7 +186,7 @@ func (c *Connection) Shutdown(ctx context.Context) error {
 	select {
 	case <-c.backgroundConnectionDoneCh:
 	case <-ctx.Done():
-		return ctx.Err()
+		return context.Cause(ctx)
 	}
 
 	c.mu.Lock()
@@ -200,17 +201,17 @@ func (c *Connection) Shutdown(ctx context.Context) error {
 	return nil
 }
 
-func (c *Connection) ContextWithStop(ctx context.Context) (context.Context, context.CancelFunc) {
+func (c *Connection) ContextWithStop(ctx context.Context) (context.Context, context.CancelCauseFunc) {
 	// Unify the parent context Done signal with the Connection's
 	// stop channel.
-	ctx, cancel := context.WithCancel(ctx)
+	ctx, cancel := context.WithCancelCause(ctx)
-	go func(ctx context.Context, cancel context.CancelFunc) {
+	go func(ctx context.Context, cancel context.CancelCauseFunc) {
 		select {
 		case <-ctx.Done():
 			// Nothing to do, either cancelled or deadline
 			// happened.
 		case <-c.stopCh:
-			cancel()
+			cancel(errors.WithStack(context.Canceled))
 		}
 	}(ctx, cancel)
 	return ctx, cancel

vendor/github.com/prometheus/client_golang/prometheus/counter.go

@@ -59,6 +59,18 @@ type ExemplarAdder interface {
 // CounterOpts is an alias for Opts. See there for doc comments.
 type CounterOpts Opts
 
+// CounterVecOpts bundles the options to create a CounterVec metric.
+// It is mandatory to set CounterOpts, see there for mandatory fields. VariableLabels
+// is optional and can safely be left to its default value.
+type CounterVecOpts struct {
+	CounterOpts
+
+	// VariableLabels are used to partition the metric vector by the given set
+	// of labels. Each label value will be constrained with the optional Contraint
+	// function, if provided.
+	VariableLabels ConstrainableLabels
+}
+
 // NewCounter creates a new Counter based on the provided CounterOpts.
 //
 // The returned implementation also implements ExemplarAdder. It is safe to
@@ -174,16 +186,24 @@ type CounterVec struct {
 // NewCounterVec creates a new CounterVec based on the provided CounterOpts and
 // partitioned by the given label names.
 func NewCounterVec(opts CounterOpts, labelNames []string) *CounterVec {
-	desc := NewDesc(
+	return V2.NewCounterVec(CounterVecOpts{
+		CounterOpts:    opts,
+		VariableLabels: UnconstrainedLabels(labelNames),
+	})
+}
+
+// NewCounterVec creates a new CounterVec based on the provided CounterVecOpts.
+func (v2) NewCounterVec(opts CounterVecOpts) *CounterVec {
+	desc := V2.NewDesc(
 		BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
 		opts.Help,
-		labelNames,
+		opts.VariableLabels,
 		opts.ConstLabels,
 	)
 	return &CounterVec{
 		MetricVec: NewMetricVec(desc, func(lvs ...string) Metric {
 			if len(lvs) != len(desc.variableLabels) {
-				panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels, lvs))
+				panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels.labelNames(), lvs))
 			}
 			result := &counter{desc: desc, labelPairs: MakeLabelPairs(desc, lvs), now: time.Now}
 			result.init(result) // Init self-collection.

vendor/github.com/prometheus/client_golang/prometheus/desc.go

@@ -14,20 +14,16 @@
 package prometheus
 
 import (
-	"errors"
 	"fmt"
 	"sort"
 	"strings"
 
 	"github.com/cespare/xxhash/v2"
+	dto "github.com/prometheus/client_model/go"
+	"github.com/prometheus/common/model"
+	"google.golang.org/protobuf/proto"
 
 	"github.com/prometheus/client_golang/prometheus/internal"
-
-	//nolint:staticcheck // Ignore SA1019. Need to keep deprecated package for compatibility.
-	"github.com/golang/protobuf/proto"
-	"github.com/prometheus/common/model"
-
-	dto "github.com/prometheus/client_model/go"
 )
 
 // Desc is the descriptor used by every Prometheus Metric. It is essentially
@@ -54,9 +50,9 @@ type Desc struct {
 	// constLabelPairs contains precalculated DTO label pairs based on
 	// the constant labels.
 	constLabelPairs []*dto.LabelPair
-	// variableLabels contains names of labels for which the metric
+	// variableLabels contains names of labels and normalization function for
-	// maintains variable values.
+	// which the metric maintains variable values.
-	variableLabels []string
+	variableLabels ConstrainedLabels
 	// id is a hash of the values of the ConstLabels and fqName. This
 	// must be unique among all registered descriptors and can therefore be
 	// used as an identifier of the descriptor.
@@ -80,10 +76,24 @@ type Desc struct {
 // For constLabels, the label values are constant. Therefore, they are fully
 // specified in the Desc. See the Collector example for a usage pattern.
 func NewDesc(fqName, help string, variableLabels []string, constLabels Labels) *Desc {
+	return V2.NewDesc(fqName, help, UnconstrainedLabels(variableLabels), constLabels)
+}
+
+// NewDesc allocates and initializes a new Desc. Errors are recorded in the Desc
+// and will be reported on registration time. variableLabels and constLabels can
+// be nil if no such labels should be set. fqName must not be empty.
+//
+// variableLabels only contain the label names and normalization functions. Their
+// label values are variable and therefore not part of the Desc. (They are managed
+// within the Metric.)
+//
+// For constLabels, the label values are constant. Therefore, they are fully
+// specified in the Desc. See the Collector example for a usage pattern.
+func (v2) NewDesc(fqName, help string, variableLabels ConstrainableLabels, constLabels Labels) *Desc {
 	d := &Desc{
 		fqName:         fqName,
 		help:           help,
-		variableLabels: variableLabels,
+		variableLabels: variableLabels.constrainedLabels(),
 	}
 	if !model.IsValidMetricName(model.LabelValue(fqName)) {
 		d.err = fmt.Errorf("%q is not a valid metric name", fqName)
@@ -93,7 +103,7 @@ func NewDesc(fqName, help string, variableLabels []string, constLabels Labels) *
 	// their sorted label names) plus the fqName (at position 0).
 	labelValues := make([]string, 1, len(constLabels)+1)
 	labelValues[0] = fqName
-	labelNames := make([]string, 0, len(constLabels)+len(variableLabels))
+	labelNames := make([]string, 0, len(constLabels)+len(d.variableLabels))
 	labelNameSet := map[string]struct{}{}
 	// First add only the const label names and sort them...
 	for labelName := range constLabels {
@@ -118,16 +128,16 @@ func NewDesc(fqName, help string, variableLabels []string, constLabels Labels) *
 	// Now add the variable label names, but prefix them with something that
 	// cannot be in a regular label name. That prevents matching the label
 	// dimension with a different mix between preset and variable labels.
-	for _, labelName := range variableLabels {
+	for _, label := range d.variableLabels {
-		if !checkLabelName(labelName) {
+		if !checkLabelName(label.Name) {
-			d.err = fmt.Errorf("%q is not a valid label name for metric %q", labelName, fqName)
+			d.err = fmt.Errorf("%q is not a valid label name for metric %q", label.Name, fqName)
 			return d
 		}
-		labelNames = append(labelNames, "$"+labelName)
+		labelNames = append(labelNames, "$"+label.Name)
-		labelNameSet[labelName] = struct{}{}
+		labelNameSet[label.Name] = struct{}{}
 	}
 	if len(labelNames) != len(labelNameSet) {
-		d.err = errors.New("duplicate label names")
+		d.err = fmt.Errorf("duplicate label names in constant and variable labels for metric %q", fqName)
 		return d
 	}
 

vendor/github.com/prometheus/client_golang/prometheus/doc.go

@@ -37,35 +37,35 @@
 //
 //	type metrics struct {
 //		cpuTemp  prometheus.Gauge
-//	  hdFailures *prometheus.CounterVec
+//		hdFailures *prometheus.CounterVec
 //	}
 //
 //	func NewMetrics(reg prometheus.Registerer) *metrics {
-//	  m := &metrics{
+//		m := &metrics{
-//	    cpuTemp: prometheus.NewGauge(prometheus.GaugeOpts{
+//			cpuTemp: prometheus.NewGauge(prometheus.GaugeOpts{
-//	      Name: "cpu_temperature_celsius",
+//				Name: "cpu_temperature_celsius",
-//	      Help: "Current temperature of the CPU.",
+//				Help: "Current temperature of the CPU.",
-//	    }),
+//			}),
-//	    hdFailures: prometheus.NewCounterVec(
+//			hdFailures: prometheus.NewCounterVec(
-//	      prometheus.CounterOpts{
+//				prometheus.CounterOpts{
-//	        Name: "hd_errors_total",
+//					Name: "hd_errors_total",
-//	        Help: "Number of hard-disk errors.",
+//					Help: "Number of hard-disk errors.",
-//	      },
+//				},
-//	      []string{"device"},
+//				[]string{"device"},
-//	    ),
+//			),
-//	  }
+//		}
-//	  reg.MustRegister(m.cpuTemp)
+//		reg.MustRegister(m.cpuTemp)
-//	  reg.MustRegister(m.hdFailures)
+//		reg.MustRegister(m.hdFailures)
-//	  return m
+//		return m
 //	}
 //
 //	func main() {
-//	  // Create a non-global registry.
+//		// Create a non-global registry.
-//	  reg := prometheus.NewRegistry()
+//		reg := prometheus.NewRegistry()
 //
-//	  // Create new metrics and register them using the custom registry.
+//		// Create new metrics and register them using the custom registry.
-//	  m := NewMetrics(reg)
+//		m := NewMetrics(reg)
-//	  // Set values for the new created metrics.
+//		// Set values for the new created metrics.
 //		m.cpuTemp.Set(65.3)
 //		m.hdFailures.With(prometheus.Labels{"device":"/dev/sda"}).Inc()
 //

vendor/github.com/prometheus/client_golang/prometheus/gauge.go

@@ -55,6 +55,18 @@ type Gauge interface {
 // GaugeOpts is an alias for Opts. See there for doc comments.
 type GaugeOpts Opts
 
+// GaugeVecOpts bundles the options to create a GaugeVec metric.
+// It is mandatory to set GaugeOpts, see there for mandatory fields. VariableLabels
+// is optional and can safely be left to its default value.
+type GaugeVecOpts struct {
+	GaugeOpts
+
+	// VariableLabels are used to partition the metric vector by the given set
+	// of labels. Each label value will be constrained with the optional Contraint
+	// function, if provided.
+	VariableLabels ConstrainableLabels
+}
+
 // NewGauge creates a new Gauge based on the provided GaugeOpts.
 //
 // The returned implementation is optimized for a fast Set method. If you have a
@@ -138,16 +150,24 @@ type GaugeVec struct {
 // NewGaugeVec creates a new GaugeVec based on the provided GaugeOpts and
 // partitioned by the given label names.
 func NewGaugeVec(opts GaugeOpts, labelNames []string) *GaugeVec {
-	desc := NewDesc(
+	return V2.NewGaugeVec(GaugeVecOpts{
+		GaugeOpts:      opts,
+		VariableLabels: UnconstrainedLabels(labelNames),
+	})
+}
+
+// NewGaugeVec creates a new GaugeVec based on the provided GaugeVecOpts.
+func (v2) NewGaugeVec(opts GaugeVecOpts) *GaugeVec {
+	desc := V2.NewDesc(
 		BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
 		opts.Help,
-		labelNames,
+		opts.VariableLabels,
 		opts.ConstLabels,
 	)
 	return &GaugeVec{
 		MetricVec: NewMetricVec(desc, func(lvs ...string) Metric {
 			if len(lvs) != len(desc.variableLabels) {
-				panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels, lvs))
+				panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels.labelNames(), lvs))
 			}
 			result := &gauge{desc: desc, labelPairs: MakeLabelPairs(desc, lvs)}
 			result.init(result) // Init self-collection.

vendor/github.com/prometheus/client_golang/prometheus/go_collector_latest.go

@@ -23,11 +23,10 @@ import (
 	"strings"
 	"sync"
 
-	//nolint:staticcheck // Ignore SA1019. Need to keep deprecated package for compatibility.
-	"github.com/golang/protobuf/proto"
-	dto "github.com/prometheus/client_model/go"
-
 	"github.com/prometheus/client_golang/prometheus/internal"
+
+	dto "github.com/prometheus/client_model/go"
+	"google.golang.org/protobuf/proto"
 )
 
 const (

vendor/github.com/prometheus/client_golang/prometheus/histogram.go

@@ -22,10 +22,9 @@ import (
 	"sync/atomic"
 	"time"
 
-	//nolint:staticcheck // Ignore SA1019. Need to keep deprecated package for compatibility.
-	"github.com/golang/protobuf/proto"
-
 	dto "github.com/prometheus/client_model/go"
+
+	"google.golang.org/protobuf/proto"
 )
 
 // nativeHistogramBounds for the frac of observed values. Only relevant for
@@ -402,7 +401,7 @@ type HistogramOpts struct {
 	// Histogram by a Prometheus server with that feature enabled (requires
 	// Prometheus v2.40+). Sparse buckets are exponential buckets covering
 	// the whole float64 range (with the exception of the “zero” bucket, see
-	// SparseBucketsZeroThreshold below). From any one bucket to the next,
+	// NativeHistogramZeroThreshold below). From any one bucket to the next,
 	// the width of the bucket grows by a constant
 	// factor. NativeHistogramBucketFactor provides an upper bound for this
 	// factor (exception see below). The smaller
@@ -433,7 +432,7 @@ type HistogramOpts struct {
 	// bucket. For best results, this should be close to a bucket
 	// boundary. This is usually the case if picking a power of two. If
 	// NativeHistogramZeroThreshold is left at zero,
-	// DefSparseBucketsZeroThreshold is used as the threshold. To configure
+	// DefNativeHistogramZeroThreshold is used as the threshold. To configure
 	// a zero bucket with an actual threshold of zero (i.e. only
 	// observations of precisely zero will go into the zero bucket), set
 	// NativeHistogramZeroThreshold to the NativeHistogramZeroThresholdZero
@@ -469,6 +468,18 @@ type HistogramOpts struct {
 	NativeHistogramMaxZeroThreshold float64
 }
 
+// HistogramVecOpts bundles the options to create a HistogramVec metric.
+// It is mandatory to set HistogramOpts, see there for mandatory fields. VariableLabels
+// is optional and can safely be left to its default value.
+type HistogramVecOpts struct {
+	HistogramOpts
+
+	// VariableLabels are used to partition the metric vector by the given set
+	// of labels. Each label value will be constrained with the optional Contraint
+	// function, if provided.
+	VariableLabels ConstrainableLabels
+}
+
 // NewHistogram creates a new Histogram based on the provided HistogramOpts. It
 // panics if the buckets in HistogramOpts are not in strictly increasing order.
 //
@@ -489,11 +500,11 @@ func NewHistogram(opts HistogramOpts) Histogram {
 
 func newHistogram(desc *Desc, opts HistogramOpts, labelValues ...string) Histogram {
 	if len(desc.variableLabels) != len(labelValues) {
-		panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels, labelValues))
+		panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels.labelNames(), labelValues))
 	}
 
 	for _, n := range desc.variableLabels {
-		if n == bucketLabel {
+		if n.Name == bucketLabel {
 			panic(errBucketLabelNotAllowed)
 		}
 	}
@@ -544,16 +555,12 @@ func newHistogram(desc *Desc, opts HistogramOpts, labelValues ...string) Histogr
 	}
 	// Finally we know the final length of h.upperBounds and can make buckets
 	// for both counts as well as exemplars:
-	h.counts[0] = &histogramCounts{
+	h.counts[0] = &histogramCounts{buckets: make([]uint64, len(h.upperBounds))}
-		buckets:                          make([]uint64, len(h.upperBounds)),
+	atomic.StoreUint64(&h.counts[0].nativeHistogramZeroThresholdBits, math.Float64bits(h.nativeHistogramZeroThreshold))
-		nativeHistogramZeroThresholdBits: math.Float64bits(h.nativeHistogramZeroThreshold),
+	atomic.StoreInt32(&h.counts[0].nativeHistogramSchema, h.nativeHistogramSchema)
-		nativeHistogramSchema:            h.nativeHistogramSchema,
+	h.counts[1] = &histogramCounts{buckets: make([]uint64, len(h.upperBounds))}
-	}
+	atomic.StoreUint64(&h.counts[1].nativeHistogramZeroThresholdBits, math.Float64bits(h.nativeHistogramZeroThreshold))
-	h.counts[1] = &histogramCounts{
+	atomic.StoreInt32(&h.counts[1].nativeHistogramSchema, h.nativeHistogramSchema)
-		buckets:                          make([]uint64, len(h.upperBounds)),
-		nativeHistogramZeroThresholdBits: math.Float64bits(h.nativeHistogramZeroThreshold),
-		nativeHistogramSchema:            h.nativeHistogramSchema,
-	}
 	h.exemplars = make([]atomic.Value, len(h.upperBounds)+1)
 
 	h.init(h) // Init self-collection.
@@ -632,8 +639,8 @@ func (hc *histogramCounts) observe(v float64, bucket int, doSparse bool) {
 			if frac == 0.5 {
 				key--
 			}
-			div := 1 << -schema
+			offset := (1 << -schema) - 1
-			key = (key + div - 1) / div
+			key = (key + offset) >> -schema
 		}
 		if isInf {
 			key++
@@ -810,7 +817,7 @@ func (h *histogram) observe(v float64, bucket int) {
 	}
 }
 
-// limitSparsebuckets applies a strategy to limit the number of populated sparse
+// limitBuckets applies a strategy to limit the number of populated sparse
 // buckets. It's generally best effort, and there are situations where the
 // number can go higher (if even the lowest resolution isn't enough to reduce
 // the number sufficiently, or if the provided counts aren't fully updated yet
@@ -1034,15 +1041,23 @@ type HistogramVec struct {
 // NewHistogramVec creates a new HistogramVec based on the provided HistogramOpts and
 // partitioned by the given label names.
 func NewHistogramVec(opts HistogramOpts, labelNames []string) *HistogramVec {
-	desc := NewDesc(
+	return V2.NewHistogramVec(HistogramVecOpts{
+		HistogramOpts:  opts,
+		VariableLabels: UnconstrainedLabels(labelNames),
+	})
+}
+
+// NewHistogramVec creates a new HistogramVec based on the provided HistogramVecOpts.
+func (v2) NewHistogramVec(opts HistogramVecOpts) *HistogramVec {
+	desc := V2.NewDesc(
 		BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
 		opts.Help,
-		labelNames,
+		opts.VariableLabels,
 		opts.ConstLabels,
 	)
 	return &HistogramVec{
 		MetricVec: NewMetricVec(desc, func(lvs ...string) Metric {
-			return newHistogram(desc, opts, lvs...)
+			return newHistogram(desc, opts.HistogramOpts, lvs...)
 		}),
 	}
 }

vendor/github.com/prometheus/client_golang/prometheus/labels.go

@@ -32,6 +32,78 @@ import (
 // create a Desc.
 type Labels map[string]string
 
+// ConstrainedLabels represents a label name and its constrain function
+// to normalize label values. This type is commonly used when constructing
+// metric vector Collectors.
+type ConstrainedLabel struct {
+	Name       string
+	Constraint func(string) string
+}
+
+func (cl ConstrainedLabel) Constrain(v string) string {
+	if cl.Constraint == nil {
+		return v
+	}
+	return cl.Constraint(v)
+}
+
+// ConstrainableLabels is an interface that allows creating of labels that can
+// be optionally constrained.
+//
+//	prometheus.V2().NewCounterVec(CounterVecOpts{
+//	  CounterOpts: {...}, // Usual CounterOpts fields
+//	  VariableLabels: []ConstrainedLabels{
+//	    {Name: "A"},
+//	    {Name: "B", Constraint: func(v string) string { ... }},
+//	  },
+//	})
+type ConstrainableLabels interface {
+	constrainedLabels() ConstrainedLabels
+	labelNames() []string
+}
+
+// ConstrainedLabels represents a collection of label name -> constrain function
+// to normalize label values. This type is commonly used when constructing
+// metric vector Collectors.
+type ConstrainedLabels []ConstrainedLabel
+
+func (cls ConstrainedLabels) constrainedLabels() ConstrainedLabels {
+	return cls
+}
+
+func (cls ConstrainedLabels) labelNames() []string {
+	names := make([]string, len(cls))
+	for i, label := range cls {
+		names[i] = label.Name
+	}
+	return names
+}
+
+// UnconstrainedLabels represents collection of label without any constraint on
+// their value. Thus, it is simply a collection of label names.
+//
+//	UnconstrainedLabels([]string{ "A", "B" })
+//
+// is equivalent to
+//
+//	ConstrainedLabels {
+//	  { Name: "A" },
+//	  { Name: "B" },
+//	}
+type UnconstrainedLabels []string
+
+func (uls UnconstrainedLabels) constrainedLabels() ConstrainedLabels {
+	constrainedLabels := make([]ConstrainedLabel, len(uls))
+	for i, l := range uls {
+		constrainedLabels[i] = ConstrainedLabel{Name: l}
+	}
+	return constrainedLabels
+}
+
+func (uls UnconstrainedLabels) labelNames() []string {
+	return uls
+}
+
 // reservedLabelPrefix is a prefix which is not legal in user-supplied
 // label names.
 const reservedLabelPrefix = "__"

vendor/github.com/prometheus/client_golang/prometheus/metric.go

@@ -20,11 +20,9 @@ import (
 	"strings"
 	"time"
 
-	//nolint:staticcheck // Ignore SA1019. Need to keep deprecated package for compatibility.
-	"github.com/golang/protobuf/proto"
-	"github.com/prometheus/common/model"
-
 	dto "github.com/prometheus/client_model/go"
+	"github.com/prometheus/common/model"
+	"google.golang.org/protobuf/proto"
 )
 
 var separatorByteSlice = []byte{model.SeparatorByte} // For convenient use with xxhash.

vendor/github.com/prometheus/client_golang/prometheus/promhttp/http.go

@@ -37,6 +37,7 @@ import (
 	"fmt"
 	"io"
 	"net/http"
+	"strconv"
 	"strings"
 	"sync"
 	"time"
@@ -47,9 +48,10 @@ import (
 )
 
 const (
-	contentTypeHeader     = "Content-Type"
+	contentTypeHeader      = "Content-Type"
-	contentEncodingHeader = "Content-Encoding"
+	contentEncodingHeader  = "Content-Encoding"
-	acceptEncodingHeader  = "Accept-Encoding"
+	acceptEncodingHeader   = "Accept-Encoding"
+	processStartTimeHeader = "Process-Start-Time-Unix"
 )
 
 var gzipPool = sync.Pool{
@@ -121,6 +123,9 @@ func HandlerForTransactional(reg prometheus.TransactionalGatherer, opts HandlerO
 	}
 
 	h := http.HandlerFunc(func(rsp http.ResponseWriter, req *http.Request) {
+		if !opts.ProcessStartTime.IsZero() {
+			rsp.Header().Set(processStartTimeHeader, strconv.FormatInt(opts.ProcessStartTime.Unix(), 10))
+		}
 		if inFlightSem != nil {
 			select {
 			case inFlightSem <- struct{}{}: // All good, carry on.
@@ -366,6 +371,14 @@ type HandlerOpts struct {
 	// (which changes the identity of the resulting series on the Prometheus
 	// server).
 	EnableOpenMetrics bool
+	// ProcessStartTime allows setting process start timevalue that will be exposed
+	// with "Process-Start-Time-Unix" response header along with the metrics
+	// payload. This allow callers to have efficient transformations to cumulative
+	// counters (e.g. OpenTelemetry) or generally _created timestamp estimation per
+	// scrape target.
+	// NOTE: This feature is experimental and not covered by OpenMetrics or Prometheus
+	// exposition format.
+	ProcessStartTime time.Time
 }
 
 // gzipAccepted returns whether the client will accept gzip-encoded content.

vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_client.go

@@ -68,16 +68,17 @@ func InstrumentRoundTripperCounter(counter *prometheus.CounterVec, next http.Rou
 		o.apply(rtOpts)
 	}
 
-	code, method := checkLabels(counter)
+	// Curry the counter with dynamic labels before checking the remaining labels.
+	code, method := checkLabels(counter.MustCurryWith(rtOpts.emptyDynamicLabels()))
 
 	return func(r *http.Request) (*http.Response, error) {
 		resp, err := next.RoundTrip(r)
 		if err == nil {
-			addWithExemplar(
+			l := labels(code, method, r.Method, resp.StatusCode, rtOpts.extraMethods...)
-				counter.With(labels(code, method, r.Method, resp.StatusCode, rtOpts.extraMethods...)),
+			for label, resolve := range rtOpts.extraLabelsFromCtx {
-				1,
+				l[label] = resolve(resp.Request.Context())
-				rtOpts.getExemplarFn(r.Context()),
+			}
-			)
+			addWithExemplar(counter.With(l), 1, rtOpts.getExemplarFn(r.Context()))
 		}
 		return resp, err
 	}
@@ -110,17 +111,18 @@ func InstrumentRoundTripperDuration(obs prometheus.ObserverVec, next http.RoundT
 		o.apply(rtOpts)
 	}
 
-	code, method := checkLabels(obs)
+	// Curry the observer with dynamic labels before checking the remaining labels.
+	code, method := checkLabels(obs.MustCurryWith(rtOpts.emptyDynamicLabels()))
 
 	return func(r *http.Request) (*http.Response, error) {
 		start := time.Now()
 		resp, err := next.RoundTrip(r)
 		if err == nil {
-			observeWithExemplar(
+			l := labels(code, method, r.Method, resp.StatusCode, rtOpts.extraMethods...)
-				obs.With(labels(code, method, r.Method, resp.StatusCode, rtOpts.extraMethods...)),
+			for label, resolve := range rtOpts.extraLabelsFromCtx {
-				time.Since(start).Seconds(),
+				l[label] = resolve(resp.Request.Context())
-				rtOpts.getExemplarFn(r.Context()),
+			}
-			)
+			observeWithExemplar(obs.With(l), time.Since(start).Seconds(), rtOpts.getExemplarFn(r.Context()))
 		}
 		return resp, err
 	}

vendor/github.com/prometheus/client_golang/prometheus/promhttp/instrument_server.go

@@ -87,7 +87,8 @@ func InstrumentHandlerDuration(obs prometheus.ObserverVec, next http.Handler, op
 		o.apply(hOpts)
 	}
 
-	code, method := checkLabels(obs)
+	// Curry the observer with dynamic labels before checking the remaining labels.
+	code, method := checkLabels(obs.MustCurryWith(hOpts.emptyDynamicLabels()))
 
 	if code {
 		return func(w http.ResponseWriter, r *http.Request) {
@@ -95,23 +96,22 @@ func InstrumentHandlerDuration(obs prometheus.ObserverVec, next http.Handler, op
 			d := newDelegator(w, nil)
 			next.ServeHTTP(d, r)
 
-			observeWithExemplar(
+			l := labels(code, method, r.Method, d.Status(), hOpts.extraMethods...)
-				obs.With(labels(code, method, r.Method, d.Status(), hOpts.extraMethods...)),
+			for label, resolve := range hOpts.extraLabelsFromCtx {
-				time.Since(now).Seconds(),
+				l[label] = resolve(r.Context())
-				hOpts.getExemplarFn(r.Context()),
+			}
-			)
+			observeWithExemplar(obs.With(l), time.Since(now).Seconds(), hOpts.getExemplarFn(r.Context()))
 		}
 	}
 
 	return func(w http.ResponseWriter, r *http.Request) {
 		now := time.Now()
 		next.ServeHTTP(w, r)
-
+		l := labels(code, method, r.Method, 0, hOpts.extraMethods...)
-		observeWithExemplar(
+		for label, resolve := range hOpts.extraLabelsFromCtx {
-			obs.With(labels(code, method, r.Method, 0, hOpts.extraMethods...)),
+			l[label] = resolve(r.Context())
-			time.Since(now).Seconds(),
+		}
-			hOpts.getExemplarFn(r.Context()),
+		observeWithExemplar(obs.With(l), time.Since(now).Seconds(), hOpts.getExemplarFn(r.Context()))
-		)
 	}
 }
 
@@ -138,28 +138,30 @@ func InstrumentHandlerCounter(counter *prometheus.CounterVec, next http.Handler,
 		o.apply(hOpts)
 	}
 
-	code, method := checkLabels(counter)
+	// Curry the counter with dynamic labels before checking the remaining labels.
+	code, method := checkLabels(counter.MustCurryWith(hOpts.emptyDynamicLabels()))
 
 	if code {
 		return func(w http.ResponseWriter, r *http.Request) {
 			d := newDelegator(w, nil)
 			next.ServeHTTP(d, r)
 
-			addWithExemplar(
+			l := labels(code, method, r.Method, d.Status(), hOpts.extraMethods...)
-				counter.With(labels(code, method, r.Method, d.Status(), hOpts.extraMethods...)),
+			for label, resolve := range hOpts.extraLabelsFromCtx {
-				1,
+				l[label] = resolve(r.Context())
-				hOpts.getExemplarFn(r.Context()),
+			}
-			)
+			addWithExemplar(counter.With(l), 1, hOpts.getExemplarFn(r.Context()))
 		}
 	}
 
 	return func(w http.ResponseWriter, r *http.Request) {
 		next.ServeHTTP(w, r)
-		addWithExemplar(
+
-			counter.With(labels(code, method, r.Method, 0, hOpts.extraMethods...)),
+		l := labels(code, method, r.Method, 0, hOpts.extraMethods...)
-			1,
+		for label, resolve := range hOpts.extraLabelsFromCtx {
-			hOpts.getExemplarFn(r.Context()),
+			l[label] = resolve(r.Context())
-		)
+		}
+		addWithExemplar(counter.With(l), 1, hOpts.getExemplarFn(r.Context()))
 	}
 }
 
@@ -191,16 +193,17 @@ func InstrumentHandlerTimeToWriteHeader(obs prometheus.ObserverVec, next http.Ha
 		o.apply(hOpts)
 	}
 
-	code, method := checkLabels(obs)
+	// Curry the observer with dynamic labels before checking the remaining labels.
+	code, method := checkLabels(obs.MustCurryWith(hOpts.emptyDynamicLabels()))
 
 	return func(w http.ResponseWriter, r *http.Request) {
 		now := time.Now()
 		d := newDelegator(w, func(status int) {
-			observeWithExemplar(
+			l := labels(code, method, r.Method, status, hOpts.extraMethods...)
-				obs.With(labels(code, method, r.Method, status, hOpts.extraMethods...)),
+			for label, resolve := range hOpts.extraLabelsFromCtx {
-				time.Since(now).Seconds(),
+				l[label] = resolve(r.Context())
-				hOpts.getExemplarFn(r.Context()),
+			}
-			)
+			observeWithExemplar(obs.With(l), time.Since(now).Seconds(), hOpts.getExemplarFn(r.Context()))
 		})
 		next.ServeHTTP(d, r)
 	}
@@ -231,28 +234,32 @@ func InstrumentHandlerRequestSize(obs prometheus.ObserverVec, next http.Handler,
 		o.apply(hOpts)
 	}
 
-	code, method := checkLabels(obs)
+	// Curry the observer with dynamic labels before checking the remaining labels.
+	code, method := checkLabels(obs.MustCurryWith(hOpts.emptyDynamicLabels()))
+
 	if code {
 		return func(w http.ResponseWriter, r *http.Request) {
 			d := newDelegator(w, nil)
 			next.ServeHTTP(d, r)
 			size := computeApproximateRequestSize(r)
-			observeWithExemplar(
+
-				obs.With(labels(code, method, r.Method, d.Status(), hOpts.extraMethods...)),
+			l := labels(code, method, r.Method, d.Status(), hOpts.extraMethods...)
-				float64(size),
+			for label, resolve := range hOpts.extraLabelsFromCtx {
-				hOpts.getExemplarFn(r.Context()),
+				l[label] = resolve(r.Context())
-			)
+			}
+			observeWithExemplar(obs.With(l), float64(size), hOpts.getExemplarFn(r.Context()))
 		}
 	}
 
 	return func(w http.ResponseWriter, r *http.Request) {
 		next.ServeHTTP(w, r)
 		size := computeApproximateRequestSize(r)
-		observeWithExemplar(
+
-			obs.With(labels(code, method, r.Method, 0, hOpts.extraMethods...)),
+		l := labels(code, method, r.Method, 0, hOpts.extraMethods...)
-			float64(size),
+		for label, resolve := range hOpts.extraLabelsFromCtx {
-			hOpts.getExemplarFn(r.Context()),
+			l[label] = resolve(r.Context())
-		)
+		}
+		observeWithExemplar(obs.With(l), float64(size), hOpts.getExemplarFn(r.Context()))
 	}
 }
 
@@ -281,16 +288,18 @@ func InstrumentHandlerResponseSize(obs prometheus.ObserverVec, next http.Handler
 		o.apply(hOpts)
 	}
 
-	code, method := checkLabels(obs)
+	// Curry the observer with dynamic labels before checking the remaining labels.
+	code, method := checkLabels(obs.MustCurryWith(hOpts.emptyDynamicLabels()))
 
 	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		d := newDelegator(w, nil)
 		next.ServeHTTP(d, r)
-		observeWithExemplar(
+
-			obs.With(labels(code, method, r.Method, d.Status(), hOpts.extraMethods...)),
+		l := labels(code, method, r.Method, d.Status(), hOpts.extraMethods...)
-			float64(d.Written()),
+		for label, resolve := range hOpts.extraLabelsFromCtx {
-			hOpts.getExemplarFn(r.Context()),
+			l[label] = resolve(r.Context())
-		)
+		}
+		observeWithExemplar(obs.With(l), float64(d.Written()), hOpts.getExemplarFn(r.Context()))
 	})
 }
 

vendor/github.com/prometheus/client_golang/prometheus/promhttp/option.go

@@ -24,14 +24,32 @@ type Option interface {
 	apply(*options)
 }
 
+// LabelValueFromCtx are used to compute the label value from request context.
+// Context can be filled with values from request through middleware.
+type LabelValueFromCtx func(ctx context.Context) string
+
 // options store options for both a handler or round tripper.
 type options struct {
-	extraMethods  []string
+	extraMethods       []string
-	getExemplarFn func(requestCtx context.Context) prometheus.Labels
+	getExemplarFn      func(requestCtx context.Context) prometheus.Labels
+	extraLabelsFromCtx map[string]LabelValueFromCtx
 }
 
 func defaultOptions() *options {
-	return &options{getExemplarFn: func(ctx context.Context) prometheus.Labels { return nil }}
+	return &options{
+		getExemplarFn:      func(ctx context.Context) prometheus.Labels { return nil },
+		extraLabelsFromCtx: map[string]LabelValueFromCtx{},
+	}
+}
+
+func (o *options) emptyDynamicLabels() prometheus.Labels {
+	labels := prometheus.Labels{}
+
+	for label := range o.extraLabelsFromCtx {
+		labels[label] = ""
+	}
+
+	return labels
 }
 
 type optionApplyFunc func(*options)
@@ -48,11 +66,19 @@ func WithExtraMethods(methods ...string) Option {
 	})
 }
 
-// WithExemplarFromContext adds allows to put a hook to all counter and histogram metrics.
+// WithExemplarFromContext allows to inject function that will get exemplar from context that will be put to counter and histogram metrics.
-// If the hook function returns non-nil labels, exemplars will be added for that request, otherwise metric
+// If the function returns nil labels or the metric does not support exemplars, no exemplar will be added (noop), but
-// will get instrumented without exemplar.
+// metric will continue to observe/increment.
 func WithExemplarFromContext(getExemplarFn func(requestCtx context.Context) prometheus.Labels) Option {
 	return optionApplyFunc(func(o *options) {
 		o.getExemplarFn = getExemplarFn
 	})
 }
+
+// WithLabelFromCtx registers a label for dynamic resolution with access to context.
+// See the example for ExampleInstrumentHandlerWithLabelResolver for example usage
+func WithLabelFromCtx(name string, valueFn LabelValueFromCtx) Option {
+	return optionApplyFunc(func(o *options) {
+		o.extraLabelsFromCtx[name] = valueFn
+	})
+}

vendor/github.com/prometheus/client_golang/prometheus/registry.go

@@ -21,18 +21,17 @@ import (
 	"path/filepath"
 	"runtime"
 	"sort"
+	"strconv"
 	"strings"
 	"sync"
 	"unicode/utf8"
 
-	"github.com/cespare/xxhash/v2"
-	//nolint:staticcheck // Ignore SA1019. Need to keep deprecated package for compatibility.
-	"github.com/golang/protobuf/proto"
-	"github.com/prometheus/common/expfmt"
-
-	dto "github.com/prometheus/client_model/go"
-
 	"github.com/prometheus/client_golang/prometheus/internal"
+
+	"github.com/cespare/xxhash/v2"
+	dto "github.com/prometheus/client_model/go"
+	"github.com/prometheus/common/expfmt"
+	"google.golang.org/protobuf/proto"
 )
 
 const (
@@ -933,6 +932,10 @@ func checkMetricConsistency(
 		h.WriteString(lp.GetValue())
 		h.Write(separatorByteSlice)
 	}
+	if dtoMetric.TimestampMs != nil {
+		h.WriteString(strconv.FormatInt(*(dtoMetric.TimestampMs), 10))
+		h.Write(separatorByteSlice)
+	}
 	hSum := h.Sum64()
 	if _, exists := metricHashes[hSum]; exists {
 		return fmt.Errorf(
@@ -962,7 +965,7 @@ func checkDescConsistency(
 	copy(lpsFromDesc, desc.constLabelPairs)
 	for _, l := range desc.variableLabels {
 		lpsFromDesc = append(lpsFromDesc, &dto.LabelPair{
-			Name: proto.String(l),
+			Name: proto.String(l.Name),
 		})
 	}
 	if len(lpsFromDesc) != len(dtoMetric.Label) {

vendor/github.com/prometheus/client_golang/prometheus/summary.go

@@ -22,11 +22,10 @@ import (
 	"sync/atomic"
 	"time"
 
-	"github.com/beorn7/perks/quantile"
-	//nolint:staticcheck // Ignore SA1019. Need to keep deprecated package for compatibility.
-	"github.com/golang/protobuf/proto"
-
 	dto "github.com/prometheus/client_model/go"
+
+	"github.com/beorn7/perks/quantile"
+	"google.golang.org/protobuf/proto"
 )
 
 // quantileLabel is used for the label that defines the quantile in a
@@ -148,6 +147,18 @@ type SummaryOpts struct {
 	BufCap uint32
 }
 
+// SummaryVecOpts bundles the options to create a SummaryVec metric.
+// It is mandatory to set SummaryOpts, see there for mandatory fields. VariableLabels
+// is optional and can safely be left to its default value.
+type SummaryVecOpts struct {
+	SummaryOpts
+
+	// VariableLabels are used to partition the metric vector by the given set
+	// of labels. Each label value will be constrained with the optional Contraint
+	// function, if provided.
+	VariableLabels ConstrainableLabels
+}
+
 // Problem with the sliding-window decay algorithm... The Merge method of
 // perk/quantile is actually not working as advertised - and it might be
 // unfixable, as the underlying algorithm is apparently not capable of merging
@@ -178,11 +189,11 @@ func NewSummary(opts SummaryOpts) Summary {
 
 func newSummary(desc *Desc, opts SummaryOpts, labelValues ...string) Summary {
 	if len(desc.variableLabels) != len(labelValues) {
-		panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels, labelValues))
+		panic(makeInconsistentCardinalityError(desc.fqName, desc.variableLabels.labelNames(), labelValues))
 	}
 
 	for _, n := range desc.variableLabels {
-		if n == quantileLabel {
+		if n.Name == quantileLabel {
 			panic(errQuantileLabelNotAllowed)
 		}
 	}
@@ -530,20 +541,28 @@ type SummaryVec struct {
 // it is handled by the Prometheus server internally, “quantile” is an illegal
 // label name. NewSummaryVec will panic if this label name is used.
 func NewSummaryVec(opts SummaryOpts, labelNames []string) *SummaryVec {
-	for _, ln := range labelNames {
+	return V2.NewSummaryVec(SummaryVecOpts{
+		SummaryOpts:    opts,
+		VariableLabels: UnconstrainedLabels(labelNames),
+	})
+}
+
+// NewSummaryVec creates a new SummaryVec based on the provided SummaryVecOpts.
+func (v2) NewSummaryVec(opts SummaryVecOpts) *SummaryVec {
+	for _, ln := range opts.VariableLabels.labelNames() {
 		if ln == quantileLabel {
 			panic(errQuantileLabelNotAllowed)
 		}
 	}
-	desc := NewDesc(
+	desc := V2.NewDesc(
 		BuildFQName(opts.Namespace, opts.Subsystem, opts.Name),
 		opts.Help,
-		labelNames,
+		opts.VariableLabels,
 		opts.ConstLabels,
 	)
 	return &SummaryVec{
 		MetricVec: NewMetricVec(desc, func(lvs ...string) Metric {
-			return newSummary(desc, opts, lvs...)
+			return newSummary(desc, opts.SummaryOpts, lvs...)
 		}),
 	}
 }

vendor/github.com/prometheus/client_golang/prometheus/timer.go

@@ -23,7 +23,9 @@ type Timer struct {
 }
 
 // NewTimer creates a new Timer. The provided Observer is used to observe a
-// duration in seconds. Timer is usually used to time a function call in the
+// duration in seconds. If the Observer implements ExemplarObserver, passing exemplar
+// later on will be also supported.
+// Timer is usually used to time a function call in the
 // following way:
 //
 //	func TimeMe() {
@@ -31,6 +33,14 @@ type Timer struct {
 //	    defer timer.ObserveDuration()
 //	    // Do actual work.
 //	}
+//
+// or
+//
+//	func TimeMeWithExemplar() {
+//		    timer := NewTimer(myHistogram)
+//		    defer timer.ObserveDurationWithExemplar(exemplar)
+//		    // Do actual work.
+//		}
 func NewTimer(o Observer) *Timer {
 	return &Timer{
 		begin:    time.Now(),
@@ -53,3 +63,19 @@ func (t *Timer) ObserveDuration() time.Duration {
 	}
 	return d
 }
+
+// ObserveDurationWithExemplar is like ObserveDuration, but it will also
+// observe exemplar with the duration unless exemplar is nil or provided Observer can't
+// be casted to ExemplarObserver.
+func (t *Timer) ObserveDurationWithExemplar(exemplar Labels) time.Duration {
+	d := time.Since(t.begin)
+	eo, ok := t.observer.(ExemplarObserver)
+	if ok && exemplar != nil {
+		eo.ObserveWithExemplar(d.Seconds(), exemplar)
+		return d
+	}
+	if t.observer != nil {
+		t.observer.Observe(d.Seconds())
+	}
+	return d
+}

vendor/github.com/prometheus/client_golang/prometheus/value.go

@@ -19,13 +19,11 @@ import (
 	"time"
 	"unicode/utf8"
 
-	//nolint:staticcheck // Ignore SA1019. Need to keep deprecated package for compatibility.
-	"github.com/golang/protobuf/proto"
-	"google.golang.org/protobuf/types/known/timestamppb"
-
 	"github.com/prometheus/client_golang/prometheus/internal"
 
 	dto "github.com/prometheus/client_model/go"
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/types/known/timestamppb"
 )
 
 // ValueType is an enumeration of metric types that represent a simple value.
@@ -188,9 +186,9 @@ func MakeLabelPairs(desc *Desc, labelValues []string) []*dto.LabelPair {
 		return desc.constLabelPairs
 	}
 	labelPairs := make([]*dto.LabelPair, 0, totalLen)
-	for i, n := range desc.variableLabels {
+	for i, l := range desc.variableLabels {
 		labelPairs = append(labelPairs, &dto.LabelPair{
-			Name:  proto.String(n),
+			Name:  proto.String(l.Name),
 			Value: proto.String(labelValues[i]),
 		})
 	}

vendor/github.com/prometheus/client_golang/prometheus/vec.go

@@ -20,6 +20,24 @@ import (
 	"github.com/prometheus/common/model"
 )
 
+var labelsPool = &sync.Pool{
+	New: func() interface{} {
+		return make(Labels)
+	},
+}
+
+func getLabelsFromPool() Labels {
+	return labelsPool.Get().(Labels)
+}
+
+func putLabelsToPool(labels Labels) {
+	for k := range labels {
+		delete(labels, k)
+	}
+
+	labelsPool.Put(labels)
+}
+
 // MetricVec is a Collector to bundle metrics of the same name that differ in
 // their label values. MetricVec is not used directly but as a building block
 // for implementations of vectors of a given metric type, like GaugeVec,
@@ -72,6 +90,7 @@ func NewMetricVec(desc *Desc, newMetric func(lvs ...string) Metric) *MetricVec {
 // with a performance overhead (for creating and processing the Labels map).
 // See also the CounterVec example.
 func (m *MetricVec) DeleteLabelValues(lvs ...string) bool {
+	lvs = constrainLabelValues(m.desc, lvs, m.curry)
 	h, err := m.hashLabelValues(lvs)
 	if err != nil {
 		return false
@@ -91,6 +110,9 @@ func (m *MetricVec) DeleteLabelValues(lvs ...string) bool {
 // This method is used for the same purpose as DeleteLabelValues(...string). See
 // there for pros and cons of the two methods.
 func (m *MetricVec) Delete(labels Labels) bool {
+	labels = constrainLabels(m.desc, labels)
+	defer putLabelsToPool(labels)
+
 	h, err := m.hashLabels(labels)
 	if err != nil {
 		return false
@@ -106,6 +128,9 @@ func (m *MetricVec) Delete(labels Labels) bool {
 // Note that curried labels will never be matched if deleting from the curried vector.
 // To match curried labels with DeletePartialMatch, it must be called on the base vector.
 func (m *MetricVec) DeletePartialMatch(labels Labels) int {
+	labels = constrainLabels(m.desc, labels)
+	defer putLabelsToPool(labels)
+
 	return m.metricMap.deleteByLabels(labels, m.curry)
 }
 
@@ -145,10 +170,10 @@ func (m *MetricVec) CurryWith(labels Labels) (*MetricVec, error) {
 		iCurry   int
 	)
 	for i, label := range m.desc.variableLabels {
-		val, ok := labels[label]
+		val, ok := labels[label.Name]
 		if iCurry < len(oldCurry) && oldCurry[iCurry].index == i {
 			if ok {
-				return nil, fmt.Errorf("label name %q is already curried", label)
+				return nil, fmt.Errorf("label name %q is already curried", label.Name)
 			}
 			newCurry = append(newCurry, oldCurry[iCurry])
 			iCurry++
@@ -156,7 +181,7 @@ func (m *MetricVec) CurryWith(labels Labels) (*MetricVec, error) {
 			if !ok {
 				continue // Label stays uncurried.
 			}
-			newCurry = append(newCurry, curriedLabelValue{i, val})
+			newCurry = append(newCurry, curriedLabelValue{i, label.Constrain(val)})
 		}
 	}
 	if l := len(oldCurry) + len(labels) - len(newCurry); l > 0 {
@@ -199,6 +224,7 @@ func (m *MetricVec) CurryWith(labels Labels) (*MetricVec, error) {
 // a wrapper around MetricVec, implementing a vector for a specific Metric
 // implementation, for example GaugeVec.
 func (m *MetricVec) GetMetricWithLabelValues(lvs ...string) (Metric, error) {
+	lvs = constrainLabelValues(m.desc, lvs, m.curry)
 	h, err := m.hashLabelValues(lvs)
 	if err != nil {
 		return nil, err
@@ -224,6 +250,9 @@ func (m *MetricVec) GetMetricWithLabelValues(lvs ...string) (Metric, error) {
 // around MetricVec, implementing a vector for a specific Metric implementation,
 // for example GaugeVec.
 func (m *MetricVec) GetMetricWith(labels Labels) (Metric, error) {
+	labels = constrainLabels(m.desc, labels)
+	defer putLabelsToPool(labels)
+
 	h, err := m.hashLabels(labels)
 	if err != nil {
 		return nil, err
@@ -266,16 +295,16 @@ func (m *MetricVec) hashLabels(labels Labels) (uint64, error) {
 		iCurry int
 	)
 	for i, label := range m.desc.variableLabels {
-		val, ok := labels[label]
+		val, ok := labels[label.Name]
 		if iCurry < len(curry) && curry[iCurry].index == i {
 			if ok {
-				return 0, fmt.Errorf("label name %q is already curried", label)
+				return 0, fmt.Errorf("label name %q is already curried", label.Name)
 			}
 			h = m.hashAdd(h, curry[iCurry].value)
 			iCurry++
 		} else {
 			if !ok {
-				return 0, fmt.Errorf("label name %q missing in label map", label)
+				return 0, fmt.Errorf("label name %q missing in label map", label.Name)
 			}
 			h = m.hashAdd(h, val)
 		}
@@ -453,7 +482,7 @@ func valueMatchesVariableOrCurriedValue(targetValue string, index int, values []
 func matchPartialLabels(desc *Desc, values []string, labels Labels, curry []curriedLabelValue) bool {
 	for l, v := range labels {
 		// Check if the target label exists in our metrics and get the index.
-		varLabelIndex, validLabel := indexOf(l, desc.variableLabels)
+		varLabelIndex, validLabel := indexOf(l, desc.variableLabels.labelNames())
 		if validLabel {
 			// Check the value of that label against the target value.
 			// We don't consider curried values in partial matches.
@@ -605,7 +634,7 @@ func matchLabels(desc *Desc, values []string, labels Labels, curry []curriedLabe
 			iCurry++
 			continue
 		}
-		if values[i] != labels[k] {
+		if values[i] != labels[k.Name] {
 			return false
 		}
 	}
@@ -621,7 +650,7 @@ func extractLabelValues(desc *Desc, labels Labels, curry []curriedLabelValue) []
 			iCurry++
 			continue
 		}
-		labelValues[i] = labels[k]
+		labelValues[i] = labels[k.Name]
 	}
 	return labelValues
 }
@@ -640,3 +669,35 @@ func inlineLabelValues(lvs []string, curry []curriedLabelValue) []string {
 	}
 	return labelValues
 }
+
+func constrainLabels(desc *Desc, labels Labels) Labels {
+	constrainedLabels := getLabelsFromPool()
+	for l, v := range labels {
+		if i, ok := indexOf(l, desc.variableLabels.labelNames()); ok {
+			v = desc.variableLabels[i].Constrain(v)
+		}
+
+		constrainedLabels[l] = v
+	}
+
+	return constrainedLabels
+}
+
+func constrainLabelValues(desc *Desc, lvs []string, curry []curriedLabelValue) []string {
+	constrainedValues := make([]string, len(lvs))
+	var iCurry, iLVs int
+	for i := 0; i < len(lvs)+len(curry); i++ {
+		if iCurry < len(curry) && curry[iCurry].index == i {
+			iCurry++
+			continue
+		}
+
+		if i < len(desc.variableLabels) {
+			constrainedValues[iLVs] = desc.variableLabels[i].Constrain(lvs[iLVs])
+		} else {
+			constrainedValues[iLVs] = lvs[iLVs]
+		}
+		iLVs++
+	}
+	return constrainedValues
+}

vendor/github.com/prometheus/client_golang/prometheus/vnext.go

@@ -0,0 +1,23 @@
+// Copyright 2022 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package prometheus
+
+type v2 struct{}
+
+// V2 is a struct that can be referenced to access experimental API that might
+// be present in v2 of client golang someday. It offers extended functionality
+// of v1 with slightly changed API. It is acceptable to use some pieces from v1
+// and e.g `prometheus.NewGauge` and some from v2 e.g. `prometheus.V2.NewDesc`
+// in the same codebase.
+var V2 = v2{}

vendor/github.com/prometheus/client_golang/prometheus/wrap.go

@@ -17,12 +17,10 @@ import (
 	"fmt"
 	"sort"
 
-	//nolint:staticcheck // Ignore SA1019. Need to keep deprecated package for compatibility.
+	"github.com/prometheus/client_golang/prometheus/internal"
-	"github.com/golang/protobuf/proto"
 
 	dto "github.com/prometheus/client_model/go"
-
+	"google.golang.org/protobuf/proto"
-	"github.com/prometheus/client_golang/prometheus/internal"
 )
 
 // WrapRegistererWith returns a Registerer wrapping the provided
@@ -206,7 +204,7 @@ func wrapDesc(desc *Desc, prefix string, labels Labels) *Desc {
 		constLabels[ln] = lv
 	}
 	// NewDesc will do remaining validations.
-	newDesc := NewDesc(prefix+desc.fqName, desc.help, desc.variableLabels, constLabels)
+	newDesc := V2.NewDesc(prefix+desc.fqName, desc.help, desc.variableLabels, constLabels)
 	// Propagate errors if there was any. This will override any errer
 	// created by NewDesc above, i.e. earlier errors get precedence.
 	if desc.err != nil {

vendor/github.com/prometheus/procfs/Makefile.common

@@ -61,7 +61,7 @@ PROMU_URL     := https://github.com/prometheus/promu/releases/download/v$(PROMU_
 SKIP_GOLANGCI_LINT :=
 GOLANGCI_LINT :=
 GOLANGCI_LINT_OPTS ?=
-GOLANGCI_LINT_VERSION ?= v1.49.0
+GOLANGCI_LINT_VERSION ?= v1.51.2
 # golangci-lint only supports linux, darwin and windows platforms on i386/amd64.
 # windows isn't included here because of the path separator being different.
 ifeq ($(GOHOSTOS),$(filter $(GOHOSTOS),linux darwin))
@@ -91,6 +91,8 @@ BUILD_DOCKER_ARCHS = $(addprefix common-docker-,$(DOCKER_ARCHS))
 PUBLISH_DOCKER_ARCHS = $(addprefix common-docker-publish-,$(DOCKER_ARCHS))
 TAG_DOCKER_ARCHS = $(addprefix common-docker-tag-latest-,$(DOCKER_ARCHS))
 
+SANITIZED_DOCKER_IMAGE_TAG := $(subst +,-,$(DOCKER_IMAGE_TAG))
+
 ifeq ($(GOHOSTARCH),amd64)
         ifeq ($(GOHOSTOS),$(filter $(GOHOSTOS),linux freebsd darwin windows))
                 # Only supported on amd64
@@ -205,7 +207,7 @@ common-tarball: promu
 .PHONY: common-docker $(BUILD_DOCKER_ARCHS)
 common-docker: $(BUILD_DOCKER_ARCHS)
 $(BUILD_DOCKER_ARCHS): common-docker-%:
-	docker build -t "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(DOCKER_IMAGE_TAG)" \
+	docker build -t "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(SANITIZED_DOCKER_IMAGE_TAG)" \
 		-f $(DOCKERFILE_PATH) \
 		--build-arg ARCH="$*" \
 		--build-arg OS="linux" \
@@ -214,19 +216,19 @@ $(BUILD_DOCKER_ARCHS): common-docker-%:
 .PHONY: common-docker-publish $(PUBLISH_DOCKER_ARCHS)
 common-docker-publish: $(PUBLISH_DOCKER_ARCHS)
 $(PUBLISH_DOCKER_ARCHS): common-docker-publish-%:
-	docker push "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(DOCKER_IMAGE_TAG)"
+	docker push "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(SANITIZED_DOCKER_IMAGE_TAG)"
 
 DOCKER_MAJOR_VERSION_TAG = $(firstword $(subst ., ,$(shell cat VERSION)))
 .PHONY: common-docker-tag-latest $(TAG_DOCKER_ARCHS)
 common-docker-tag-latest: $(TAG_DOCKER_ARCHS)
 $(TAG_DOCKER_ARCHS): common-docker-tag-latest-%:
-	docker tag "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(DOCKER_IMAGE_TAG)" "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:latest"
+	docker tag "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(SANITIZED_DOCKER_IMAGE_TAG)" "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:latest"
-	docker tag "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(DOCKER_IMAGE_TAG)" "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:v$(DOCKER_MAJOR_VERSION_TAG)"
+	docker tag "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:$(SANITIZED_DOCKER_IMAGE_TAG)" "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$*:v$(DOCKER_MAJOR_VERSION_TAG)"
 
 .PHONY: common-docker-manifest
 common-docker-manifest:
-	DOCKER_CLI_EXPERIMENTAL=enabled docker manifest create -a "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_TAG)" $(foreach ARCH,$(DOCKER_ARCHS),$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$(ARCH):$(DOCKER_IMAGE_TAG))
+	DOCKER_CLI_EXPERIMENTAL=enabled docker manifest create -a "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME):$(SANITIZED_DOCKER_IMAGE_TAG)" $(foreach ARCH,$(DOCKER_ARCHS),$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME)-linux-$(ARCH):$(SANITIZED_DOCKER_IMAGE_TAG))
-	DOCKER_CLI_EXPERIMENTAL=enabled docker manifest push "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME):$(DOCKER_IMAGE_TAG)"
+	DOCKER_CLI_EXPERIMENTAL=enabled docker manifest push "$(DOCKER_REPO)/$(DOCKER_IMAGE_NAME):$(SANITIZED_DOCKER_IMAGE_TAG)"
 
 .PHONY: promu
 promu: $(PROMU)

vendor/github.com/prometheus/procfs/fs.go

@@ -21,6 +21,7 @@ import (
 // kernel data structures.
 type FS struct {
 	proc fs.FS
+	real bool
 }
 
 // DefaultMountPoint is the common mount point of the proc filesystem.
@@ -39,5 +40,11 @@ func NewFS(mountPoint string) (FS, error) {
 	if err != nil {
 		return FS{}, err
 	}
-	return FS{fs}, nil
+
+	real, err := isRealProc(mountPoint)
+	if err != nil {
+		return FS{}, err
+	}
+
+	return FS{fs, real}, nil
 }

vendor/github.com/prometheus/procfs/fs_statfs_notype.go

@@ -0,0 +1,23 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build netbsd || openbsd || solaris || windows
+// +build netbsd openbsd solaris windows
+
+package procfs
+
+// isRealProc returns true on architectures that don't have a Type argument
+// in their Statfs_t struct
+func isRealProc(mountPoint string) (bool, error) {
+	return true, nil
+}

vendor/github.com/prometheus/procfs/fs_statfs_type.go

@@ -0,0 +1,33 @@
+// Copyright 2018 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+//go:build !netbsd && !openbsd && !solaris && !windows
+// +build !netbsd,!openbsd,!solaris,!windows
+
+package procfs
+
+import (
+	"syscall"
+)
+
+// isRealProc determines whether supplied mountpoint is really a proc filesystem.
+func isRealProc(mountPoint string) (bool, error) {
+	stat := syscall.Statfs_t{}
+	err := syscall.Statfs(mountPoint, &stat)
+	if err != nil {
+		return false, err
+	}
+
+	// 0x9fa0 is PROC_SUPER_MAGIC: https://elixir.bootlin.com/linux/v6.1/source/include/uapi/linux/magic.h#L87
+	return stat.Type == 0x9fa0, nil
+}

vendor/github.com/prometheus/procfs/internal/util/parse.go

@@ -64,6 +64,21 @@ func ParsePInt64s(ss []string) ([]*int64, error) {
 	return us, nil
 }
 
+// Parses a uint64 from given hex in string.
+func ParseHexUint64s(ss []string) ([]*uint64, error) {
+	us := make([]*uint64, 0, len(ss))
+	for _, s := range ss {
+		u, err := strconv.ParseUint(s, 16, 64)
+		if err != nil {
+			return nil, err
+		}
+
+		us = append(us, &u)
+	}
+
+	return us, nil
+}
+
 // ReadUintFromFile reads a file and attempts to parse a uint64 from it.
 func ReadUintFromFile(path string) (uint64, error) {
 	data, err := os.ReadFile(path)

vendor/github.com/prometheus/procfs/mountstats.go

@@ -186,6 +186,8 @@ type NFSOperationStats struct {
 	CumulativeTotalResponseMilliseconds uint64
 	// Duration from when a request was enqueued to when it was completely handled.
 	CumulativeTotalRequestMilliseconds uint64
+	// The average time from the point the client sends RPC requests until it receives the response.
+	AverageRTTMilliseconds float64
 	// The count of operations that complete with tk_status < 0.  These statuses usually indicate error conditions.
 	Errors uint64
 }
@@ -534,7 +536,6 @@ func parseNFSOperationStats(s *bufio.Scanner) ([]NFSOperationStats, error) {
 
 			ns = append(ns, n)
 		}
-
 		opStats := NFSOperationStats{
 			Operation:                           strings.TrimSuffix(ss[0], ":"),
 			Requests:                            ns[0],
@@ -546,6 +547,9 @@ func parseNFSOperationStats(s *bufio.Scanner) ([]NFSOperationStats, error) {
 			CumulativeTotalResponseMilliseconds: ns[6],
 			CumulativeTotalRequestMilliseconds:  ns[7],
 		}
+		if ns[0] != 0 {
+			opStats.AverageRTTMilliseconds = float64(ns[6]) / float64(ns[0])
+		}
 
 		if len(ns) > 8 {
 			opStats.Errors = ns[8]

vendor/github.com/prometheus/procfs/net_conntrackstat.go

@@ -18,7 +18,6 @@ import (
 	"bytes"
 	"fmt"
 	"io"
-	"strconv"
 	"strings"
 
 	"github.com/prometheus/procfs/internal/util"
@@ -28,9 +27,13 @@ import (
 // and contains netfilter conntrack statistics at one CPU core.
 type ConntrackStatEntry struct {
 	Entries       uint64
+	Searched      uint64
 	Found         uint64
+	New           uint64
 	Invalid       uint64
 	Ignore        uint64
+	Delete        uint64
+	DeleteList    uint64
 	Insert        uint64
 	InsertFailed  uint64
 	Drop          uint64
@@ -81,73 +84,34 @@ func parseConntrackStat(r io.Reader) ([]ConntrackStatEntry, error) {
 
 // Parses a ConntrackStatEntry from given array of fields.
 func parseConntrackStatEntry(fields []string) (*ConntrackStatEntry, error) {
-	if len(fields) != 17 {
+	entries, err := util.ParseHexUint64s(fields)
-		return nil, fmt.Errorf("invalid conntrackstat entry, missing fields")
-	}
-	entry := &ConntrackStatEntry{}
-
-	entries, err := parseConntrackStatField(fields[0])
 	if err != nil {
-		return nil, err
+		return nil, fmt.Errorf("invalid conntrackstat entry, couldn't parse fields: %s", err)
 	}
-	entry.Entries = entries
+	numEntries := len(entries)
-
+	if numEntries < 16 || numEntries > 17 {
-	found, err := parseConntrackStatField(fields[2])
+		return nil, fmt.Errorf("invalid conntrackstat entry, invalid number of fields: %d", numEntries)
-	if err != nil {
-		return nil, err
 	}
-	entry.Found = found
 
-	invalid, err := parseConntrackStatField(fields[4])
+	stats := &ConntrackStatEntry{
-	if err != nil {
+		Entries:      *entries[0],
-		return nil, err
+		Searched:     *entries[1],
+		Found:        *entries[2],
+		New:          *entries[3],
+		Invalid:      *entries[4],
+		Ignore:       *entries[5],
+		Delete:       *entries[6],
+		DeleteList:   *entries[7],
+		Insert:       *entries[8],
+		InsertFailed: *entries[9],
+		Drop:         *entries[10],
+		EarlyDrop:    *entries[11],
 	}
-	entry.Invalid = invalid
 
-	ignore, err := parseConntrackStatField(fields[5])
+	// Ignore missing search_restart on Linux < 2.6.35.
-	if err != nil {
+	if numEntries == 17 {
-		return nil, err
+		stats.SearchRestart = *entries[16]
 	}
-	entry.Ignore = ignore
 
-	insert, err := parseConntrackStatField(fields[8])
+	return stats, nil
-	if err != nil {
-		return nil, err
-	}
-	entry.Insert = insert
-
-	insertFailed, err := parseConntrackStatField(fields[9])
-	if err != nil {
-		return nil, err
-	}
-	entry.InsertFailed = insertFailed
-
-	drop, err := parseConntrackStatField(fields[10])
-	if err != nil {
-		return nil, err
-	}
-	entry.Drop = drop
-
-	earlyDrop, err := parseConntrackStatField(fields[11])
-	if err != nil {
-		return nil, err
-	}
-	entry.EarlyDrop = earlyDrop
-
-	searchRestart, err := parseConntrackStatField(fields[16])
-	if err != nil {
-		return nil, err
-	}
-	entry.SearchRestart = searchRestart
-
-	return entry, nil
-}
-
-// Parses a uint64 from given hex in string.
-func parseConntrackStatField(field string) (uint64, error) {
-	val, err := strconv.ParseUint(field, 16, 64)
-	if err != nil {
-		return 0, fmt.Errorf("couldn't parse %q field: %w", field, err)
-	}
-	return val, err
 }

vendor/github.com/prometheus/procfs/net_softnet.go

@@ -76,6 +76,7 @@ func parseSoftnet(r io.Reader) ([]SoftnetStat, error) {
 	s := bufio.NewScanner(r)
 
 	var stats []SoftnetStat
+	cpuIndex := 0
 	for s.Scan() {
 		columns := strings.Fields(s.Text())
 		width := len(columns)
@@ -127,9 +128,13 @@ func parseSoftnet(r io.Reader) ([]SoftnetStat, error) {
 
 			softnetStat.SoftnetBacklogLen = us[0]
 			softnetStat.Index = us[1]
+		} else {
+			// For older kernels, create the Index based on the scan line number.
+			softnetStat.Index = uint32(cpuIndex)
 		}
 		softnetStat.Width = width
 		stats = append(stats, softnetStat)
+		cpuIndex++
 	}
 
 	return stats, nil

vendor/github.com/prometheus/procfs/net_wireless.go

@@ -0,0 +1,182 @@
+// Copyright 2023 The Prometheus Authors
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package procfs
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"strconv"
+	"strings"
+
+	"github.com/prometheus/procfs/internal/util"
+)
+
+// Wireless models the content of /proc/net/wireless.
+type Wireless struct {
+	Name string
+
+	// Status is the current 4-digit hex value status of the interface.
+	Status uint64
+
+	// QualityLink is the link quality.
+	QualityLink int
+
+	// QualityLevel is the signal gain (dBm).
+	QualityLevel int
+
+	// QualityNoise is the signal noise baseline (dBm).
+	QualityNoise int
+
+	// DiscardedNwid is the number of discarded packets with wrong nwid/essid.
+	DiscardedNwid int
+
+	// DiscardedCrypt is the number of discarded packets with wrong code/decode (WEP).
+	DiscardedCrypt int
+
+	// DiscardedFrag is the number of discarded packets that can't perform MAC reassembly.
+	DiscardedFrag int
+
+	// DiscardedRetry is the number of discarded packets that reached max MAC retries.
+	DiscardedRetry int
+
+	// DiscardedMisc is the number of discarded packets for other reasons.
+	DiscardedMisc int
+
+	// MissedBeacon is the number of missed beacons/superframe.
+	MissedBeacon int
+}
+
+// Wireless returns kernel wireless statistics.
+func (fs FS) Wireless() ([]*Wireless, error) {
+	b, err := util.ReadFileNoStat(fs.proc.Path("net/wireless"))
+	if err != nil {
+		return nil, err
+	}
+
+	m, err := parseWireless(bytes.NewReader(b))
+	if err != nil {
+		return nil, fmt.Errorf("failed to parse wireless: %w", err)
+	}
+
+	return m, nil
+}
+
+// parseWireless parses the contents of /proc/net/wireless.
+/*
+Inter-| sta-|   Quality        |   Discarded packets               | Missed | WE
+face | tus | link level noise |  nwid  crypt   frag  retry   misc | beacon | 22
+ eth1: 0000    5.  -256.  -10.       0      1      0     3      0        0
+ eth2: 0000    5.  -256.  -20.       0      2      0     4      0        0
+*/
+func parseWireless(r io.Reader) ([]*Wireless, error) {
+	var (
+		interfaces []*Wireless
+		scanner    = bufio.NewScanner(r)
+	)
+
+	for n := 0; scanner.Scan(); n++ {
+		// Skip the 2 header lines.
+		if n < 2 {
+			continue
+		}
+
+		line := scanner.Text()
+
+		parts := strings.Split(line, ":")
+		if len(parts) != 2 {
+			return nil, fmt.Errorf("expected 2 parts after splitting line by ':', got %d for line %q", len(parts), line)
+		}
+
+		name := strings.TrimSpace(parts[0])
+		stats := strings.Fields(parts[1])
+
+		if len(stats) < 10 {
+			return nil, fmt.Errorf("invalid number of fields in line %d, expected at least 10, got %d: %q", n, len(stats), line)
+		}
+
+		status, err := strconv.ParseUint(stats[0], 16, 16)
+		if err != nil {
+			return nil, fmt.Errorf("invalid status in line %d: %q", n, line)
+		}
+
+		qlink, err := strconv.Atoi(strings.TrimSuffix(stats[1], "."))
+		if err != nil {
+			return nil, fmt.Errorf("failed to parse Quality:link as integer %q: %w", qlink, err)
+		}
+
+		qlevel, err := strconv.Atoi(strings.TrimSuffix(stats[2], "."))
+		if err != nil {
+			return nil, fmt.Errorf("failed to parse Quality:level as integer %q: %w", qlevel, err)
+		}
+
+		qnoise, err := strconv.Atoi(strings.TrimSuffix(stats[3], "."))
+		if err != nil {
+			return nil, fmt.Errorf("failed to parse Quality:noise as integer %q: %w", qnoise, err)
+		}
+
+		dnwid, err := strconv.Atoi(stats[4])
+		if err != nil {
+			return nil, fmt.Errorf("failed to parse Discarded:nwid as integer %q: %w", dnwid, err)
+		}
+
+		dcrypt, err := strconv.Atoi(stats[5])
+		if err != nil {
+			return nil, fmt.Errorf("failed to parse Discarded:crypt as integer %q: %w", dcrypt, err)
+		}
+
+		dfrag, err := strconv.Atoi(stats[6])
+		if err != nil {
+			return nil, fmt.Errorf("failed to parse Discarded:frag as integer %q: %w", dfrag, err)
+		}
+
+		dretry, err := strconv.Atoi(stats[7])
+		if err != nil {
+			return nil, fmt.Errorf("failed to parse Discarded:retry as integer %q: %w", dretry, err)
+		}
+
+		dmisc, err := strconv.Atoi(stats[8])
+		if err != nil {
+			return nil, fmt.Errorf("failed to parse Discarded:misc as integer %q: %w", dmisc, err)
+		}
+
+		mbeacon, err := strconv.Atoi(stats[9])
+		if err != nil {
+			return nil, fmt.Errorf("failed to parse Missed:beacon as integer %q: %w", mbeacon, err)
+		}
+
+		w := &Wireless{
+			Name:           name,
+			Status:         status,
+			QualityLink:    qlink,
+			QualityLevel:   qlevel,
+			QualityNoise:   qnoise,
+			DiscardedNwid:  dnwid,
+			DiscardedCrypt: dcrypt,
+			DiscardedFrag:  dfrag,
+			DiscardedRetry: dretry,
+			DiscardedMisc:  dmisc,
+			MissedBeacon:   mbeacon,
+		}
+
+		interfaces = append(interfaces, w)
+	}
+
+	if err := scanner.Err(); err != nil {
+		return nil, fmt.Errorf("failed to scan /proc/net/wireless: %w", err)
+	}
+
+	return interfaces, nil
+}

vendor/github.com/prometheus/procfs/netstat.go

@@ -15,7 +15,6 @@ package procfs
 
 import (
 	"bufio"
-	"io"
 	"os"
 	"path/filepath"
 	"strconv"
@@ -38,12 +37,7 @@ func (fs FS) NetStat() ([]NetStat, error) {
 	var netStatsTotal []NetStat
 
 	for _, filePath := range statFiles {
-		file, err := os.Open(filePath)
+		procNetstat, err := parseNetstat(filePath)
-		if err != nil {
-			return nil, err
-		}
-
-		procNetstat, err := parseNetstat(file)
 		if err != nil {
 			return nil, err
 		}
@@ -56,14 +50,17 @@ func (fs FS) NetStat() ([]NetStat, error) {
 
 // parseNetstat parses the metrics from `/proc/net/stat/` file
 // and returns a NetStat structure.
-func parseNetstat(r io.Reader) (NetStat, error) {
+func parseNetstat(filePath string) (NetStat, error) {
-	var (
+	netStat := NetStat{
-		scanner = bufio.NewScanner(r)
+		Stats: make(map[string][]uint64),
-		netStat = NetStat{
+	}
-			Stats: make(map[string][]uint64),
+	file, err := os.Open(filePath)
-		}
+	if err != nil {
-	)
+		return netStat, err
+	}
+	defer file.Close()
 
+	scanner := bufio.NewScanner(file)
 	scanner.Scan()
 
 	// First string is always a header for stats

vendor/github.com/prometheus/procfs/proc.go

@@ -21,7 +21,6 @@ import (
 	"strconv"
 	"strings"
 
-	"github.com/prometheus/procfs/internal/fs"
 	"github.com/prometheus/procfs/internal/util"
 )
 
@@ -30,7 +29,7 @@ type Proc struct {
 	// The process ID.
 	PID int
 
-	fs fs.FS
+	fs FS
 }
 
 // Procs represents a list of Proc structs.
@@ -92,7 +91,7 @@ func (fs FS) Proc(pid int) (Proc, error) {
 	if _, err := os.Stat(fs.proc.Path(strconv.Itoa(pid))); err != nil {
 		return Proc{}, err
 	}
-	return Proc{PID: pid, fs: fs.proc}, nil
+	return Proc{PID: pid, fs: fs}, nil
 }
 
 // AllProcs returns a list of all currently available processes.
@@ -114,7 +113,7 @@ func (fs FS) AllProcs() (Procs, error) {
 		if err != nil {
 			continue
 		}
-		p = append(p, Proc{PID: int(pid), fs: fs.proc})
+		p = append(p, Proc{PID: int(pid), fs: fs})
 	}
 
 	return p, nil
@@ -237,6 +236,19 @@ func (p Proc) FileDescriptorTargets() ([]string, error) {
 // FileDescriptorsLen returns the number of currently open file descriptors of
 // a process.
 func (p Proc) FileDescriptorsLen() (int, error) {
+	// Use fast path if available (Linux v6.2): https://github.com/torvalds/linux/commit/f1f1f2569901
+	if p.fs.real {
+		stat, err := os.Stat(p.path("fd"))
+		if err != nil {
+			return 0, err
+		}
+
+		size := stat.Size()
+		if size > 0 {
+			return int(size), nil
+		}
+	}
+
 	fds, err := p.fileDescriptors()
 	if err != nil {
 		return 0, err
@@ -285,7 +297,7 @@ func (p Proc) fileDescriptors() ([]string, error) {
 }
 
 func (p Proc) path(pa ...string) string {
-	return p.fs.Path(append([]string{strconv.Itoa(p.PID)}, pa...)...)
+	return p.fs.proc.Path(append([]string{strconv.Itoa(p.PID)}, pa...)...)
 }
 
 // FileDescriptorsInfo retrieves information about all file descriptors of

vendor/github.com/prometheus/procfs/proc_stat.go

@@ -18,7 +18,6 @@ import (
 	"fmt"
 	"os"
 
-	"github.com/prometheus/procfs/internal/fs"
 	"github.com/prometheus/procfs/internal/util"
 )
 
@@ -112,7 +111,7 @@ type ProcStat struct {
 	// Aggregated block I/O delays, measured in clock ticks (centiseconds).
 	DelayAcctBlkIOTicks uint64
 
-	proc fs.FS
+	proc FS
 }
 
 // NewStat returns the current status information of the process.
@@ -210,8 +209,7 @@ func (s ProcStat) ResidentMemory() int {
 
 // StartTime returns the unix timestamp of the process in seconds.
 func (s ProcStat) StartTime() (float64, error) {
-	fs := FS{proc: s.proc}
+	stat, err := s.proc.Stat()
-	stat, err := fs.Stat()
 	if err != nil {
 		return 0, err
 	}

vendor/github.com/prometheus/procfs/proc_status.go

@@ -15,6 +15,7 @@ package procfs
 
 import (
 	"bytes"
+	"sort"
 	"strconv"
 	"strings"
 
@@ -76,6 +77,9 @@ type ProcStatus struct {
 	UIDs [4]string
 	// GIDs of the process (Real, effective, saved set, and filesystem GIDs)
 	GIDs [4]string
+
+	// CpusAllowedList: List of cpu cores processes are allowed to run on.
+	CpusAllowedList []uint64
 }
 
 // NewStatus returns the current status information of the process.
@@ -161,10 +165,38 @@ func (s *ProcStatus) fillStatus(k string, vString string, vUint uint64, vUintByt
 		s.VoluntaryCtxtSwitches = vUint
 	case "nonvoluntary_ctxt_switches":
 		s.NonVoluntaryCtxtSwitches = vUint
+	case "Cpus_allowed_list":
+		s.CpusAllowedList = calcCpusAllowedList(vString)
 	}
+
 }
 
 // TotalCtxtSwitches returns the total context switch.
 func (s ProcStatus) TotalCtxtSwitches() uint64 {
 	return s.VoluntaryCtxtSwitches + s.NonVoluntaryCtxtSwitches
 }
+
+func calcCpusAllowedList(cpuString string) []uint64 {
+	s := strings.Split(cpuString, ",")
+
+	var g []uint64
+
+	for _, cpu := range s {
+		// parse cpu ranges, example: 1-3=[1,2,3]
+		if l := strings.Split(strings.TrimSpace(cpu), "-"); len(l) > 1 {
+			startCPU, _ := strconv.ParseUint(l[0], 10, 64)
+			endCPU, _ := strconv.ParseUint(l[1], 10, 64)
+
+			for i := startCPU; i <= endCPU; i++ {
+				g = append(g, i)
+			}
+		} else if len(l) == 1 {
+			cpu, _ := strconv.ParseUint(l[0], 10, 64)
+			g = append(g, cpu)
+		}
+
+	}
+
+	sort.Slice(g, func(i, j int) bool { return g[i] < g[j] })
+	return g
+}

vendor/github.com/prometheus/procfs/thread.go

@@ -54,7 +54,8 @@ func (fs FS) AllThreads(pid int) (Procs, error) {
 		if err != nil {
 			continue
 		}
-		t = append(t, Proc{PID: int(tid), fs: fsi.FS(taskPath)})
+
+		t = append(t, Proc{PID: int(tid), fs: FS{fsi.FS(taskPath), fs.real}})
 	}
 
 	return t, nil
@@ -66,13 +67,13 @@ func (fs FS) Thread(pid, tid int) (Proc, error) {
 	if _, err := os.Stat(taskPath); err != nil {
 		return Proc{}, err
 	}
-	return Proc{PID: tid, fs: fsi.FS(taskPath)}, nil
+	return Proc{PID: tid, fs: FS{fsi.FS(taskPath), fs.real}}, nil
 }
 
 // Thread returns a process for a given TID of Proc.
 func (proc Proc) Thread(tid int) (Proc, error) {
-	tfs := fsi.FS(proc.path("task"))
+	tfs := FS{fsi.FS(proc.path("task")), proc.fs.real}
-	if _, err := os.Stat(tfs.Path(strconv.Itoa(tid))); err != nil {
+	if _, err := os.Stat(tfs.proc.Path(strconv.Itoa(tid))); err != nil {
 		return Proc{}, err
 	}
 	return Proc{PID: tid, fs: tfs}, nil

vendor/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/doc.go

@@ -0,0 +1,20 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package otlpmetric provides an OpenTelemetry metric Exporter that can be
+// used with PeriodicReader. It transforms metricdata into OTLP and transmits
+// the transformed data to OTLP receivers. The Exporter is configurable to use
+// different Clients, each using a distinct transport protocol to communicate
+// to an OTLP receiving endpoint.
+package otlpmetric // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric"

vendor/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
+
+      "Source" form shall mean the preferred form for making modifications,
+      including but not limited to software source code, documentation
+      source, and configuration files.
+
+      "Object" form shall mean any form resulting from mechanical
+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
+      submitted to Licensor for inclusion in the Work by the copyright owner
+      or by an individual or Legal Entity authorized to submit on behalf of
+      the copyright owner. For the purposes of this definition, "submitted"
+      means any form of electronic, verbal, or written communication sent
+      to the Licensor or its representatives, including but not limited to
+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
+      Licensor for the purpose of discussing and improving the Work, but
+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
+      publicly display, publicly perform, sublicense, and distribute the
+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
+      use, offer to sell, sell, import, and otherwise transfer the Work,
+      where such license applies only to those patent claims licensable
+      by such Contributor that are necessarily infringed by their
+      Contribution(s) alone or by combination of their Contribution(s)
+      with the Work to which such Contribution(s) was submitted. If You
+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
+      granted to You under this License for that Work shall terminate
+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright [yyyy] [name of copyright owner]
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

vendor/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/client.go

@@ -0,0 +1,199 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otlpmetricgrpc // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc"
+
+import (
+	"context"
+	"time"
+
+	"google.golang.org/genproto/googleapis/rpc/errdetails"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/metadata"
+	"google.golang.org/grpc/status"
+
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal"
+	"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf"
+	"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/retry"
+	colmetricpb "go.opentelemetry.io/proto/otlp/collector/metrics/v1"
+	metricpb "go.opentelemetry.io/proto/otlp/metrics/v1"
+)
+
+type client struct {
+	metadata      metadata.MD
+	exportTimeout time.Duration
+	requestFunc   retry.RequestFunc
+
+	// ourConn keeps track of where conn was created: true if created here in
+	// NewClient, or false if passed with an option. This is important on
+	// Shutdown as the conn should only be closed if we created it. Otherwise,
+	// it is up to the processes that passed the conn to close it.
+	ourConn bool
+	conn    *grpc.ClientConn
+	msc     colmetricpb.MetricsServiceClient
+}
+
+// newClient creates a new gRPC metric client.
+func newClient(ctx context.Context, cfg oconf.Config) (*client, error) {
+	c := &client{
+		exportTimeout: cfg.Metrics.Timeout,
+		requestFunc:   cfg.RetryConfig.RequestFunc(retryable),
+		conn:          cfg.GRPCConn,
+	}
+
+	if len(cfg.Metrics.Headers) > 0 {
+		c.metadata = metadata.New(cfg.Metrics.Headers)
+	}
+
+	if c.conn == nil {
+		// If the caller did not provide a ClientConn when the client was
+		// created, create one using the configuration they did provide.
+		conn, err := grpc.DialContext(ctx, cfg.Metrics.Endpoint, cfg.DialOptions...)
+		if err != nil {
+			return nil, err
+		}
+		// Keep track that we own the lifecycle of this conn and need to close
+		// it on Shutdown.
+		c.ourConn = true
+		c.conn = conn
+	}
+
+	c.msc = colmetricpb.NewMetricsServiceClient(c.conn)
+
+	return c, nil
+}
+
+// Shutdown shuts down the client, freeing all resource.
+//
+// Any active connections to a remote endpoint are closed if they were created
+// by the client. Any gRPC connection passed during creation using
+// WithGRPCConn will not be closed. It is the caller's responsibility to
+// handle cleanup of that resource.
+func (c *client) Shutdown(ctx context.Context) error {
+	// The otlpmetric.Exporter synchronizes access to client methods and
+	// ensures this is called only once. The only thing that needs to be done
+	// here is to release any computational resources the client holds.
+
+	c.metadata = nil
+	c.requestFunc = nil
+	c.msc = nil
+
+	err := ctx.Err()
+	if c.ourConn {
+		closeErr := c.conn.Close()
+		// A context timeout error takes precedence over this error.
+		if err == nil && closeErr != nil {
+			err = closeErr
+		}
+	}
+	c.conn = nil
+	return err
+}
+
+// UploadMetrics sends protoMetrics to connected endpoint.
+//
+// Retryable errors from the server will be handled according to any
+// RetryConfig the client was created with.
+func (c *client) UploadMetrics(ctx context.Context, protoMetrics *metricpb.ResourceMetrics) error {
+	// The otlpmetric.Exporter synchronizes access to client methods, and
+	// ensures this is not called after the Exporter is shutdown. Only thing
+	// to do here is send data.
+
+	select {
+	case <-ctx.Done():
+		// Do not upload if the context is already expired.
+		return ctx.Err()
+	default:
+	}
+
+	ctx, cancel := c.exportContext(ctx)
+	defer cancel()
+
+	return c.requestFunc(ctx, func(iCtx context.Context) error {
+		resp, err := c.msc.Export(iCtx, &colmetricpb.ExportMetricsServiceRequest{
+			ResourceMetrics: []*metricpb.ResourceMetrics{protoMetrics},
+		})
+		if resp != nil && resp.PartialSuccess != nil {
+			msg := resp.PartialSuccess.GetErrorMessage()
+			n := resp.PartialSuccess.GetRejectedDataPoints()
+			if n != 0 || msg != "" {
+				err := internal.MetricPartialSuccessError(n, msg)
+				otel.Handle(err)
+			}
+		}
+		// nil is converted to OK.
+		if status.Code(err) == codes.OK {
+			// Success.
+			return nil
+		}
+		return err
+	})
+}
+
+// exportContext returns a copy of parent with an appropriate deadline and
+// cancellation function based on the clients configured export timeout.
+//
+// It is the callers responsibility to cancel the returned context once its
+// use is complete, via the parent or directly with the returned CancelFunc, to
+// ensure all resources are correctly released.
+func (c *client) exportContext(parent context.Context) (context.Context, context.CancelFunc) {
+	var (
+		ctx    context.Context
+		cancel context.CancelFunc
+	)
+
+	if c.exportTimeout > 0 {
+		ctx, cancel = context.WithTimeout(parent, c.exportTimeout)
+	} else {
+		ctx, cancel = context.WithCancel(parent)
+	}
+
+	if c.metadata.Len() > 0 {
+		ctx = metadata.NewOutgoingContext(ctx, c.metadata)
+	}
+
+	return ctx, cancel
+}
+
+// retryable returns if err identifies a request that can be retried and a
+// duration to wait for if an explicit throttle time is included in err.
+func retryable(err error) (bool, time.Duration) {
+	s := status.Convert(err)
+	switch s.Code() {
+	case codes.Canceled,
+		codes.DeadlineExceeded,
+		codes.ResourceExhausted,
+		codes.Aborted,
+		codes.OutOfRange,
+		codes.Unavailable,
+		codes.DataLoss:
+		return true, throttleDelay(s)
+	}
+
+	// Not a retry-able error.
+	return false, 0
+}
+
+// throttleDelay returns a duration to wait for if an explicit throttle time
+// is included in the response status.
+func throttleDelay(s *status.Status) time.Duration {
+	for _, detail := range s.Details() {
+		if t, ok := detail.(*errdetails.RetryInfo); ok {
+			return t.RetryDelay.AsDuration()
+		}
+	}
+	return 0
+}

vendor/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/config.go

@@ -0,0 +1,256 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otlpmetricgrpc // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc"
+
+import (
+	"fmt"
+	"time"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/credentials"
+
+	"go.opentelemetry.io/otel"
+	"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf"
+	"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/retry"
+	"go.opentelemetry.io/otel/sdk/metric"
+)
+
+// Option applies a configuration option to the Exporter.
+type Option interface {
+	applyGRPCOption(oconf.Config) oconf.Config
+}
+
+func asGRPCOptions(opts []Option) []oconf.GRPCOption {
+	converted := make([]oconf.GRPCOption, len(opts))
+	for i, o := range opts {
+		converted[i] = oconf.NewGRPCOption(o.applyGRPCOption)
+	}
+	return converted
+}
+
+// RetryConfig defines configuration for retrying the export of metric data
+// that failed.
+//
+// This configuration does not define any network retry strategy. That is
+// entirely handled by the gRPC ClientConn.
+type RetryConfig retry.Config
+
+type wrappedOption struct {
+	oconf.GRPCOption
+}
+
+func (w wrappedOption) applyGRPCOption(cfg oconf.Config) oconf.Config {
+	return w.ApplyGRPCOption(cfg)
+}
+
+// WithInsecure disables client transport security for the Exporter's gRPC
+// connection, just like grpc.WithInsecure()
+// (https://pkg.go.dev/google.golang.org/grpc#WithInsecure) does.
+//
+// If the OTEL_EXPORTER_OTLP_ENDPOINT or OTEL_EXPORTER_OTLP_METRICS_ENDPOINT
+// environment variable is set, and this option is not passed, that variable
+// value will be used to determine client security. If the endpoint has a
+// scheme of "http" or "unix" client security will be disabled. If both are
+// set, OTEL_EXPORTER_OTLP_METRICS_ENDPOINT will take precedence.
+//
+// By default, if an environment variable is not set, and this option is not
+// passed, client security will be used.
+//
+// This option has no effect if WithGRPCConn is used.
+func WithInsecure() Option {
+	return wrappedOption{oconf.WithInsecure()}
+}
+
+// WithEndpoint sets the target endpoint the Exporter will connect to.
+//
+// If the OTEL_EXPORTER_OTLP_ENDPOINT or OTEL_EXPORTER_OTLP_METRICS_ENDPOINT
+// environment variable is set, and this option is not passed, that variable
+// value will be used. If both are set, OTEL_EXPORTER_OTLP_METRICS_ENDPOINT
+// will take precedence.
+//
+// By default, if an environment variable is not set, and this option is not
+// passed, "localhost:4317" will be used.
+//
+// This option has no effect if WithGRPCConn is used.
+func WithEndpoint(endpoint string) Option {
+	return wrappedOption{oconf.WithEndpoint(endpoint)}
+}
+
+// WithReconnectionPeriod set the minimum amount of time between connection
+// attempts to the target endpoint.
+//
+// This option has no effect if WithGRPCConn is used.
+func WithReconnectionPeriod(rp time.Duration) Option {
+	return wrappedOption{oconf.NewGRPCOption(func(cfg oconf.Config) oconf.Config {
+		cfg.ReconnectionPeriod = rp
+		return cfg
+	})}
+}
+
+func compressorToCompression(compressor string) oconf.Compression {
+	if compressor == "gzip" {
+		return oconf.GzipCompression
+	}
+
+	otel.Handle(fmt.Errorf("invalid compression type: '%s', using no compression as default", compressor))
+	return oconf.NoCompression
+}
+
+// WithCompressor sets the compressor the gRPC client uses.
+//
+// It is the responsibility of the caller to ensure that the compressor set
+// has been registered with google.golang.org/grpc/encoding (see
+// encoding.RegisterCompressor for more information). For example, to register
+// the gzip compressor import the package:
+//
+//	import _ "google.golang.org/grpc/encoding/gzip"
+//
+// If the OTEL_EXPORTER_OTLP_COMPRESSION or
+// OTEL_EXPORTER_OTLP_METRICS_COMPRESSION environment variable is set, and
+// this option is not passed, that variable value will be used. That value can
+// be either "none" or "gzip". If both are set,
+// OTEL_EXPORTER_OTLP_METRICS_COMPRESSION will take precedence.
+//
+// By default, if an environment variable is not set, and this option is not
+// passed, no compressor will be used.
+//
+// This option has no effect if WithGRPCConn is used.
+func WithCompressor(compressor string) Option {
+	return wrappedOption{oconf.WithCompression(compressorToCompression(compressor))}
+}
+
+// WithHeaders will send the provided headers with each gRPC requests.
+//
+// If the OTEL_EXPORTER_OTLP_HEADERS or OTEL_EXPORTER_OTLP_METRICS_HEADERS
+// environment variable is set, and this option is not passed, that variable
+// value will be used. The value will be parsed as a list of key value pairs.
+// These pairs are expected to be in the W3C Correlation-Context format
+// without additional semi-colon delimited metadata (i.e. "k1=v1,k2=v2"). If
+// both are set, OTEL_EXPORTER_OTLP_METRICS_HEADERS will take precedence.
+//
+// By default, if an environment variable is not set, and this option is not
+// passed, no user headers will be set.
+func WithHeaders(headers map[string]string) Option {
+	return wrappedOption{oconf.WithHeaders(headers)}
+}
+
+// WithTLSCredentials sets the gRPC connection to use creds.
+//
+// If the OTEL_EXPORTER_OTLP_CERTIFICATE or
+// OTEL_EXPORTER_OTLP_METRICS_CERTIFICATE environment variable is set, and
+// this option is not passed, that variable value will be used. The value will
+// be parsed the filepath of the TLS certificate chain to use. If both are
+// set, OTEL_EXPORTER_OTLP_METRICS_CERTIFICATE will take precedence.
+//
+// By default, if an environment variable is not set, and this option is not
+// passed, no TLS credentials will be used.
+//
+// This option has no effect if WithGRPCConn is used.
+func WithTLSCredentials(creds credentials.TransportCredentials) Option {
+	return wrappedOption{oconf.NewGRPCOption(func(cfg oconf.Config) oconf.Config {
+		cfg.Metrics.GRPCCredentials = creds
+		return cfg
+	})}
+}
+
+// WithServiceConfig defines the default gRPC service config used.
+//
+// This option has no effect if WithGRPCConn is used.
+func WithServiceConfig(serviceConfig string) Option {
+	return wrappedOption{oconf.NewGRPCOption(func(cfg oconf.Config) oconf.Config {
+		cfg.ServiceConfig = serviceConfig
+		return cfg
+	})}
+}
+
+// WithDialOption sets explicit grpc.DialOptions to use when establishing a
+// gRPC connection. The options here are appended to the internal grpc.DialOptions
+// used so they will take precedence over any other internal grpc.DialOptions
+// they might conflict with.
+//
+// This option has no effect if WithGRPCConn is used.
+func WithDialOption(opts ...grpc.DialOption) Option {
+	return wrappedOption{oconf.NewGRPCOption(func(cfg oconf.Config) oconf.Config {
+		cfg.DialOptions = opts
+		return cfg
+	})}
+}
+
+// WithGRPCConn sets conn as the gRPC ClientConn used for all communication.
+//
+// This option takes precedence over any other option that relates to
+// establishing or persisting a gRPC connection to a target endpoint. Any
+// other option of those types passed will be ignored.
+//
+// It is the callers responsibility to close the passed conn. The Exporter
+// Shutdown method will not close this connection.
+func WithGRPCConn(conn *grpc.ClientConn) Option {
+	return wrappedOption{oconf.NewGRPCOption(func(cfg oconf.Config) oconf.Config {
+		cfg.GRPCConn = conn
+		return cfg
+	})}
+}
+
+// WithTimeout sets the max amount of time an Exporter will attempt an export.
+//
+// This takes precedence over any retry settings defined by WithRetry. Once
+// this time limit has been reached the export is abandoned and the metric
+// data is dropped.
+//
+// If the OTEL_EXPORTER_OTLP_TIMEOUT or OTEL_EXPORTER_OTLP_METRICS_TIMEOUT
+// environment variable is set, and this option is not passed, that variable
+// value will be used. The value will be parsed as an integer representing the
+// timeout in milliseconds. If both are set,
+// OTEL_EXPORTER_OTLP_METRICS_TIMEOUT will take precedence.
+//
+// By default, if an environment variable is not set, and this option is not
+// passed, a timeout of 10 seconds will be used.
+func WithTimeout(duration time.Duration) Option {
+	return wrappedOption{oconf.WithTimeout(duration)}
+}
+
+// WithRetry sets the retry policy for transient retryable errors that are
+// returned by the target endpoint.
+//
+// If the target endpoint responds with not only a retryable error, but
+// explicitly returns a backoff time in the response, that time will take
+// precedence over these settings.
+//
+// These settings do not define any network retry strategy. That is entirely
+// handled by the gRPC ClientConn.
+//
+// If unset, the default retry policy will be used. It will retry the export
+// 5 seconds after receiving a retryable error and increase exponentially
+// after each error for no more than a total time of 1 minute.
+func WithRetry(settings RetryConfig) Option {
+	return wrappedOption{oconf.WithRetry(retry.Config(settings))}
+}
+
+// WithTemporalitySelector sets the TemporalitySelector the client will use to
+// determine the Temporality of an instrument based on its kind. If this option
+// is not used, the client will use the DefaultTemporalitySelector from the
+// go.opentelemetry.io/otel/sdk/metric package.
+func WithTemporalitySelector(selector metric.TemporalitySelector) Option {
+	return wrappedOption{oconf.WithTemporalitySelector(selector)}
+}
+
+// WithAggregationSelector sets the AggregationSelector the client will use to
+// determine the aggregation to use for an instrument based on its kind. If
+// this option is not used, the reader will use the DefaultAggregationSelector
+// from the go.opentelemetry.io/otel/sdk/metric package, or the aggregation
+// explicitly passed for a view matching an instrument.
+func WithAggregationSelector(selector metric.AggregationSelector) Option {
+	return wrappedOption{oconf.WithAggregationSelector(selector)}
+}

vendor/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/doc.go

@@ -0,0 +1,17 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package otlpmetricgrpc provides an otlpmetric.Exporter that communicates
+// with an OTLP receiving endpoint using gRPC.
+package otlpmetricgrpc // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc"

vendor/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/exporter.go

@@ -0,0 +1,167 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package otlpmetricgrpc // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc"
+
+import (
+	"context"
+	"fmt"
+	"sync"
+
+	"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf"
+	"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform"
+	"go.opentelemetry.io/otel/internal/global"
+	"go.opentelemetry.io/otel/sdk/metric"
+	"go.opentelemetry.io/otel/sdk/metric/metricdata"
+	metricpb "go.opentelemetry.io/proto/otlp/metrics/v1"
+)
+
+// Exporter is a OpenTelemetry metric Exporter using gRPC.
+type Exporter struct {
+	// Ensure synchronous access to the client across all functionality.
+	clientMu sync.Mutex
+	client   interface {
+		UploadMetrics(context.Context, *metricpb.ResourceMetrics) error
+		Shutdown(context.Context) error
+	}
+
+	temporalitySelector metric.TemporalitySelector
+	aggregationSelector metric.AggregationSelector
+
+	shutdownOnce sync.Once
+}
+
+func newExporter(c *client, cfg oconf.Config) (*Exporter, error) {
+	ts := cfg.Metrics.TemporalitySelector
+	if ts == nil {
+		ts = func(metric.InstrumentKind) metricdata.Temporality {
+			return metricdata.CumulativeTemporality
+		}
+	}
+
+	as := cfg.Metrics.AggregationSelector
+	if as == nil {
+		as = metric.DefaultAggregationSelector
+	}
+
+	return &Exporter{
+		client: c,
+
+		temporalitySelector: ts,
+		aggregationSelector: as,
+	}, nil
+}
+
+// Temporality returns the Temporality to use for an instrument kind.
+func (e *Exporter) Temporality(k metric.InstrumentKind) metricdata.Temporality {
+	return e.temporalitySelector(k)
+}
+
+// Aggregation returns the Aggregation to use for an instrument kind.
+func (e *Exporter) Aggregation(k metric.InstrumentKind) metric.Aggregation {
+	return e.aggregationSelector(k)
+}
+
+// Export transforms and transmits metric data to an OTLP receiver.
+//
+// This method returns an error if called after Shutdown.
+// This method returns an error if the method is canceled by the passed context.
+func (e *Exporter) Export(ctx context.Context, rm *metricdata.ResourceMetrics) error {
+	defer global.Debug("OTLP/gRPC exporter export", "Data", rm)
+
+	otlpRm, err := transform.ResourceMetrics(rm)
+	// Best effort upload of transformable metrics.
+	e.clientMu.Lock()
+	upErr := e.client.UploadMetrics(ctx, otlpRm)
+	e.clientMu.Unlock()
+	if upErr != nil {
+		if err == nil {
+			return fmt.Errorf("failed to upload metrics: %w", upErr)
+		}
+		// Merge the two errors.
+		return fmt.Errorf("failed to upload incomplete metrics (%s): %w", err, upErr)
+	}
+	return err
+}
+
+// ForceFlush flushes any metric data held by an exporter.
+//
+// This method returns an error if called after Shutdown.
+// This method returns an error if the method is canceled by the passed context.
+//
+// This method is safe to call concurrently.
+func (e *Exporter) ForceFlush(ctx context.Context) error {
+	// The exporter and client hold no state, nothing to flush.
+	return ctx.Err()
+}
+
+// Shutdown flushes all metric data held by an exporter and releases any held
+// computational resources.
+//
+// This method returns an error if called after Shutdown.
+// This method returns an error if the method is canceled by the passed context.
+//
+// This method is safe to call concurrently.
+func (e *Exporter) Shutdown(ctx context.Context) error {
+	err := errShutdown
+	e.shutdownOnce.Do(func() {
+		e.clientMu.Lock()
+		client := e.client
+		e.client = shutdownClient{}
+		e.clientMu.Unlock()
+		err = client.Shutdown(ctx)
+	})
+	return err
+}
+
+var errShutdown = fmt.Errorf("gRPC exporter is shutdown")
+
+type shutdownClient struct{}
+
+func (c shutdownClient) err(ctx context.Context) error {
+	if err := ctx.Err(); err != nil {
+		return err
+	}
+	return errShutdown
+}
+
+func (c shutdownClient) UploadMetrics(ctx context.Context, _ *metricpb.ResourceMetrics) error {
+	return c.err(ctx)
+}
+
+func (c shutdownClient) Shutdown(ctx context.Context) error {
+	return c.err(ctx)
+}
+
+// MarshalLog returns logging data about the Exporter.
+func (e *Exporter) MarshalLog() interface{} {
+	return struct{ Type string }{Type: "OTLP/gRPC"}
+}
+
+// New returns an OpenTelemetry metric Exporter. The Exporter can be used with
+// a PeriodicReader to export OpenTelemetry metric data to an OTLP receiving
+// endpoint using gRPC.
+//
+// If an already established gRPC ClientConn is not passed in options using
+// WithGRPCConn, a connection to the OTLP endpoint will be established based
+// on options. If a connection cannot be establishes in the lifetime of ctx,
+// an error will be returned.
+func New(ctx context.Context, options ...Option) (*Exporter, error) {
+	cfg := oconf.NewGRPCConfig(asGRPCOptions(options)...)
+	c, err := newClient(ctx, cfg)
+	if err != nil {
+		return nil, err
+	}
+	return newExporter(c, cfg)
+}

vendor/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/envconfig/envconfig.go

@@ -0,0 +1,202 @@
+// Code created by gotmpl. DO NOT MODIFY.
+// source: internal/shared/otlp/envconfig/envconfig.go.tmpl
+
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package envconfig // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/envconfig"
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+	"errors"
+	"fmt"
+	"net/url"
+	"strconv"
+	"strings"
+	"time"
+
+	"go.opentelemetry.io/otel/internal/global"
+)
+
+// ConfigFn is the generic function used to set a config.
+type ConfigFn func(*EnvOptionsReader)
+
+// EnvOptionsReader reads the required environment variables.
+type EnvOptionsReader struct {
+	GetEnv    func(string) string
+	ReadFile  func(string) ([]byte, error)
+	Namespace string
+}
+
+// Apply runs every ConfigFn.
+func (e *EnvOptionsReader) Apply(opts ...ConfigFn) {
+	for _, o := range opts {
+		o(e)
+	}
+}
+
+// GetEnvValue gets an OTLP environment variable value of the specified key
+// using the GetEnv function.
+// This function prepends the OTLP specified namespace to all key lookups.
+func (e *EnvOptionsReader) GetEnvValue(key string) (string, bool) {
+	v := strings.TrimSpace(e.GetEnv(keyWithNamespace(e.Namespace, key)))
+	return v, v != ""
+}
+
+// WithString retrieves the specified config and passes it to ConfigFn as a string.
+func WithString(n string, fn func(string)) func(e *EnvOptionsReader) {
+	return func(e *EnvOptionsReader) {
+		if v, ok := e.GetEnvValue(n); ok {
+			fn(v)
+		}
+	}
+}
+
+// WithBool returns a ConfigFn that reads the environment variable n and if it exists passes its parsed bool value to fn.
+func WithBool(n string, fn func(bool)) ConfigFn {
+	return func(e *EnvOptionsReader) {
+		if v, ok := e.GetEnvValue(n); ok {
+			b := strings.ToLower(v) == "true"
+			fn(b)
+		}
+	}
+}
+
+// WithDuration retrieves the specified config and passes it to ConfigFn as a duration.
+func WithDuration(n string, fn func(time.Duration)) func(e *EnvOptionsReader) {
+	return func(e *EnvOptionsReader) {
+		if v, ok := e.GetEnvValue(n); ok {
+			d, err := strconv.Atoi(v)
+			if err != nil {
+				global.Error(err, "parse duration", "input", v)
+				return
+			}
+			fn(time.Duration(d) * time.Millisecond)
+		}
+	}
+}
+
+// WithHeaders retrieves the specified config and passes it to ConfigFn as a map of HTTP headers.
+func WithHeaders(n string, fn func(map[string]string)) func(e *EnvOptionsReader) {
+	return func(e *EnvOptionsReader) {
+		if v, ok := e.GetEnvValue(n); ok {
+			fn(stringToHeader(v))
+		}
+	}
+}
+
+// WithURL retrieves the specified config and passes it to ConfigFn as a net/url.URL.
+func WithURL(n string, fn func(*url.URL)) func(e *EnvOptionsReader) {
+	return func(e *EnvOptionsReader) {
+		if v, ok := e.GetEnvValue(n); ok {
+			u, err := url.Parse(v)
+			if err != nil {
+				global.Error(err, "parse url", "input", v)
+				return
+			}
+			fn(u)
+		}
+	}
+}
+
+// WithCertPool returns a ConfigFn that reads the environment variable n as a filepath to a TLS certificate pool. If it exists, it is parsed as a crypto/x509.CertPool and it is passed to fn.
+func WithCertPool(n string, fn func(*x509.CertPool)) ConfigFn {
+	return func(e *EnvOptionsReader) {
+		if v, ok := e.GetEnvValue(n); ok {
+			b, err := e.ReadFile(v)
+			if err != nil {
+				global.Error(err, "read tls ca cert file", "file", v)
+				return
+			}
+			c, err := createCertPool(b)
+			if err != nil {
+				global.Error(err, "create tls cert pool")
+				return
+			}
+			fn(c)
+		}
+	}
+}
+
+// WithClientCert returns a ConfigFn that reads the environment variable nc and nk as filepaths to a client certificate and key pair. If they exists, they are parsed as a crypto/tls.Certificate and it is passed to fn.
+func WithClientCert(nc, nk string, fn func(tls.Certificate)) ConfigFn {
+	return func(e *EnvOptionsReader) {
+		vc, okc := e.GetEnvValue(nc)
+		vk, okk := e.GetEnvValue(nk)
+		if !okc || !okk {
+			return
+		}
+		cert, err := e.ReadFile(vc)
+		if err != nil {
+			global.Error(err, "read tls client cert", "file", vc)
+			return
+		}
+		key, err := e.ReadFile(vk)
+		if err != nil {
+			global.Error(err, "read tls client key", "file", vk)
+			return
+		}
+		crt, err := tls.X509KeyPair(cert, key)
+		if err != nil {
+			global.Error(err, "create tls client key pair")
+			return
+		}
+		fn(crt)
+	}
+}
+
+func keyWithNamespace(ns, key string) string {
+	if ns == "" {
+		return key
+	}
+	return fmt.Sprintf("%s_%s", ns, key)
+}
+
+func stringToHeader(value string) map[string]string {
+	headersPairs := strings.Split(value, ",")
+	headers := make(map[string]string)
+
+	for _, header := range headersPairs {
+		n, v, found := strings.Cut(header, "=")
+		if !found {
+			global.Error(errors.New("missing '="), "parse headers", "input", header)
+			continue
+		}
+		name, err := url.QueryUnescape(n)
+		if err != nil {
+			global.Error(err, "escape header key", "key", n)
+			continue
+		}
+		trimmedName := strings.TrimSpace(name)
+		value, err := url.QueryUnescape(v)
+		if err != nil {
+			global.Error(err, "escape header value", "value", v)
+			continue
+		}
+		trimmedValue := strings.TrimSpace(value)
+
+		headers[trimmedName] = trimmedValue
+	}
+
+	return headers
+}
+
+func createCertPool(certBytes []byte) (*x509.CertPool, error) {
+	cp := x509.NewCertPool()
+	if ok := cp.AppendCertsFromPEM(certBytes); !ok {
+		return nil, errors.New("failed to append certificate to the cert pool")
+	}
+	return cp, nil
+}

vendor/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/gen.go

@@ -0,0 +1,42 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package internal // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal"
+
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/partialsuccess.go.tmpl "--data={}" --out=partialsuccess.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/partialsuccess_test.go.tmpl "--data={}" --out=partialsuccess_test.go
+
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/retry/retry.go.tmpl "--data={}" --out=retry/retry.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/retry/retry_test.go.tmpl "--data={}" --out=retry/retry_test.go
+
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/envconfig/envconfig.go.tmpl "--data={}" --out=envconfig/envconfig.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/envconfig/envconfig_test.go.tmpl "--data={}" --out=envconfig/envconfig_test.go
+
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/otlpmetric/oconf/envconfig.go.tmpl "--data={\"envconfigImportPath\": \"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/envconfig\"}" --out=oconf/envconfig.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/otlpmetric/oconf/envconfig_test.go.tmpl "--data={}" --out=oconf/envconfig_test.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/otlpmetric/oconf/options.go.tmpl "--data={\"retryImportPath\": \"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/retry\"}" --out=oconf/options.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/otlpmetric/oconf/options_test.go.tmpl "--data={\"envconfigImportPath\": \"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/envconfig\"}" --out=oconf/options_test.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/otlpmetric/oconf/optiontypes.go.tmpl "--data={}" --out=oconf/optiontypes.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/otlpmetric/oconf/tls.go.tmpl "--data={}" --out=oconf/tls.go
+
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/otlpmetric/otest/client.go.tmpl "--data={}" --out=otest/client.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/otlpmetric/otest/client_test.go.tmpl "--data={\"internalImportPath\": \"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal\"}" --out=otest/client_test.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/otlpmetric/otest/collector.go.tmpl "--data={\"oconfImportPath\": \"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf\"}" --out=otest/collector.go
+
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/otlpmetric/transform/attribute.go.tmpl "--data={}" --out=transform/attribute.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/otlpmetric/transform/attribute_test.go.tmpl "--data={}" --out=transform/attribute_test.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/otlpmetric/transform/error.go.tmpl "--data={}" --out=transform/error.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/otlpmetric/transform/error_test.go.tmpl "--data={}" --out=transform/error_test.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/otlpmetric/transform/metricdata.go.tmpl "--data={}" --out=transform/metricdata.go
+//go:generate gotmpl --body=../../../../../internal/shared/otlp/otlpmetric/transform/metricdata_test.go.tmpl "--data={}" --out=transform/metricdata_test.go

vendor/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/envconfig.go

@@ -0,0 +1,221 @@
+// Code created by gotmpl. DO NOT MODIFY.
+// source: internal/shared/otlp/otlpmetric/oconf/envconfig.go.tmpl
+
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package oconf // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf"
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+	"net/url"
+	"os"
+	"path"
+	"strings"
+	"time"
+
+	"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/envconfig"
+	"go.opentelemetry.io/otel/internal/global"
+	"go.opentelemetry.io/otel/sdk/metric"
+	"go.opentelemetry.io/otel/sdk/metric/metricdata"
+)
+
+// DefaultEnvOptionsReader is the default environments reader.
+var DefaultEnvOptionsReader = envconfig.EnvOptionsReader{
+	GetEnv:    os.Getenv,
+	ReadFile:  os.ReadFile,
+	Namespace: "OTEL_EXPORTER_OTLP",
+}
+
+// ApplyGRPCEnvConfigs applies the env configurations for gRPC.
+func ApplyGRPCEnvConfigs(cfg Config) Config {
+	opts := getOptionsFromEnv()
+	for _, opt := range opts {
+		cfg = opt.ApplyGRPCOption(cfg)
+	}
+	return cfg
+}
+
+// ApplyHTTPEnvConfigs applies the env configurations for HTTP.
+func ApplyHTTPEnvConfigs(cfg Config) Config {
+	opts := getOptionsFromEnv()
+	for _, opt := range opts {
+		cfg = opt.ApplyHTTPOption(cfg)
+	}
+	return cfg
+}
+
+func getOptionsFromEnv() []GenericOption {
+	opts := []GenericOption{}
+
+	tlsConf := &tls.Config{}
+	DefaultEnvOptionsReader.Apply(
+		envconfig.WithURL("ENDPOINT", func(u *url.URL) {
+			opts = append(opts, withEndpointScheme(u))
+			opts = append(opts, newSplitOption(func(cfg Config) Config {
+				cfg.Metrics.Endpoint = u.Host
+				// For OTLP/HTTP endpoint URLs without a per-signal
+				// configuration, the passed endpoint is used as a base URL
+				// and the signals are sent to these paths relative to that.
+				cfg.Metrics.URLPath = path.Join(u.Path, DefaultMetricsPath)
+				return cfg
+			}, withEndpointForGRPC(u)))
+		}),
+		envconfig.WithURL("METRICS_ENDPOINT", func(u *url.URL) {
+			opts = append(opts, withEndpointScheme(u))
+			opts = append(opts, newSplitOption(func(cfg Config) Config {
+				cfg.Metrics.Endpoint = u.Host
+				// For endpoint URLs for OTLP/HTTP per-signal variables, the
+				// URL MUST be used as-is without any modification. The only
+				// exception is that if an URL contains no path part, the root
+				// path / MUST be used.
+				path := u.Path
+				if path == "" {
+					path = "/"
+				}
+				cfg.Metrics.URLPath = path
+				return cfg
+			}, withEndpointForGRPC(u)))
+		}),
+		envconfig.WithCertPool("CERTIFICATE", func(p *x509.CertPool) { tlsConf.RootCAs = p }),
+		envconfig.WithCertPool("METRICS_CERTIFICATE", func(p *x509.CertPool) { tlsConf.RootCAs = p }),
+		envconfig.WithClientCert("CLIENT_CERTIFICATE", "CLIENT_KEY", func(c tls.Certificate) { tlsConf.Certificates = []tls.Certificate{c} }),
+		envconfig.WithClientCert("METRICS_CLIENT_CERTIFICATE", "METRICS_CLIENT_KEY", func(c tls.Certificate) { tlsConf.Certificates = []tls.Certificate{c} }),
+		envconfig.WithBool("INSECURE", func(b bool) { opts = append(opts, withInsecure(b)) }),
+		envconfig.WithBool("METRICS_INSECURE", func(b bool) { opts = append(opts, withInsecure(b)) }),
+		withTLSConfig(tlsConf, func(c *tls.Config) { opts = append(opts, WithTLSClientConfig(c)) }),
+		envconfig.WithHeaders("HEADERS", func(h map[string]string) { opts = append(opts, WithHeaders(h)) }),
+		envconfig.WithHeaders("METRICS_HEADERS", func(h map[string]string) { opts = append(opts, WithHeaders(h)) }),
+		WithEnvCompression("COMPRESSION", func(c Compression) { opts = append(opts, WithCompression(c)) }),
+		WithEnvCompression("METRICS_COMPRESSION", func(c Compression) { opts = append(opts, WithCompression(c)) }),
+		envconfig.WithDuration("TIMEOUT", func(d time.Duration) { opts = append(opts, WithTimeout(d)) }),
+		envconfig.WithDuration("METRICS_TIMEOUT", func(d time.Duration) { opts = append(opts, WithTimeout(d)) }),
+		withEnvTemporalityPreference("METRICS_TEMPORALITY_PREFERENCE", func(t metric.TemporalitySelector) { opts = append(opts, WithTemporalitySelector(t)) }),
+		withEnvAggPreference("METRICS_DEFAULT_HISTOGRAM_AGGREGATION", func(a metric.AggregationSelector) { opts = append(opts, WithAggregationSelector(a)) }),
+	)
+
+	return opts
+}
+
+func withEndpointForGRPC(u *url.URL) func(cfg Config) Config {
+	return func(cfg Config) Config {
+		// For OTLP/gRPC endpoints, this is the target to which the
+		// exporter is going to send telemetry.
+		cfg.Metrics.Endpoint = path.Join(u.Host, u.Path)
+		return cfg
+	}
+}
+
+// WithEnvCompression retrieves the specified config and passes it to ConfigFn as a Compression.
+func WithEnvCompression(n string, fn func(Compression)) func(e *envconfig.EnvOptionsReader) {
+	return func(e *envconfig.EnvOptionsReader) {
+		if v, ok := e.GetEnvValue(n); ok {
+			cp := NoCompression
+			if v == "gzip" {
+				cp = GzipCompression
+			}
+
+			fn(cp)
+		}
+	}
+}
+
+func withEndpointScheme(u *url.URL) GenericOption {
+	switch strings.ToLower(u.Scheme) {
+	case "http", "unix":
+		return WithInsecure()
+	default:
+		return WithSecure()
+	}
+}
+
+// revive:disable-next-line:flag-parameter
+func withInsecure(b bool) GenericOption {
+	if b {
+		return WithInsecure()
+	}
+	return WithSecure()
+}
+
+func withTLSConfig(c *tls.Config, fn func(*tls.Config)) func(e *envconfig.EnvOptionsReader) {
+	return func(e *envconfig.EnvOptionsReader) {
+		if c.RootCAs != nil || len(c.Certificates) > 0 {
+			fn(c)
+		}
+	}
+}
+
+func withEnvTemporalityPreference(n string, fn func(metric.TemporalitySelector)) func(e *envconfig.EnvOptionsReader) {
+	return func(e *envconfig.EnvOptionsReader) {
+		if s, ok := e.GetEnvValue(n); ok {
+			switch strings.ToLower(s) {
+			case "cumulative":
+				fn(cumulativeTemporality)
+			case "delta":
+				fn(deltaTemporality)
+			case "lowmemory":
+				fn(lowMemory)
+			default:
+				global.Warn("OTEL_EXPORTER_OTLP_METRICS_TEMPORALITY_PREFERENCE is set to an invalid value, ignoring.", "value", s)
+			}
+		}
+	}
+}
+
+func cumulativeTemporality(metric.InstrumentKind) metricdata.Temporality {
+	return metricdata.CumulativeTemporality
+}
+
+func deltaTemporality(ik metric.InstrumentKind) metricdata.Temporality {
+	switch ik {
+	case metric.InstrumentKindCounter, metric.InstrumentKindHistogram, metric.InstrumentKindObservableCounter:
+		return metricdata.DeltaTemporality
+	default:
+		return metricdata.CumulativeTemporality
+	}
+}
+
+func lowMemory(ik metric.InstrumentKind) metricdata.Temporality {
+	switch ik {
+	case metric.InstrumentKindCounter, metric.InstrumentKindHistogram:
+		return metricdata.DeltaTemporality
+	default:
+		return metricdata.CumulativeTemporality
+	}
+}
+
+func withEnvAggPreference(n string, fn func(metric.AggregationSelector)) func(e *envconfig.EnvOptionsReader) {
+	return func(e *envconfig.EnvOptionsReader) {
+		if s, ok := e.GetEnvValue(n); ok {
+			switch strings.ToLower(s) {
+			case "explicit_bucket_histogram":
+				fn(metric.DefaultAggregationSelector)
+			case "base2_exponential_bucket_histogram":
+				fn(func(kind metric.InstrumentKind) metric.Aggregation {
+					if kind == metric.InstrumentKindHistogram {
+						return metric.AggregationBase2ExponentialHistogram{
+							MaxSize:  160,
+							MaxScale: 20,
+							NoMinMax: false,
+						}
+					}
+					return metric.DefaultAggregationSelector(kind)
+				})
+			default:
+				global.Warn("OTEL_EXPORTER_OTLP_METRICS_DEFAULT_HISTOGRAM_AGGREGATION is set to an invalid value, ignoring.", "value", s)
+			}
+		}
+	}
+}

vendor/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/options.go

@@ -0,0 +1,359 @@
+// Code created by gotmpl. DO NOT MODIFY.
+// source: internal/shared/otlp/otlpmetric/oconf/options.go.tmpl
+
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package oconf // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf"
+
+import (
+	"crypto/tls"
+	"fmt"
+	"path"
+	"strings"
+	"time"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/backoff"
+	"google.golang.org/grpc/credentials"
+	"google.golang.org/grpc/credentials/insecure"
+	"google.golang.org/grpc/encoding/gzip"
+
+	"go.opentelemetry.io/otel/exporters/otlp/otlpmetric"
+	"go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/retry"
+	"go.opentelemetry.io/otel/sdk/metric"
+)
+
+const (
+	// DefaultMaxAttempts describes how many times the driver
+	// should retry the sending of the payload in case of a
+	// retryable error.
+	DefaultMaxAttempts int = 5
+	// DefaultMetricsPath is a default URL path for endpoint that
+	// receives metrics.
+	DefaultMetricsPath string = "/v1/metrics"
+	// DefaultBackoff is a default base backoff time used in the
+	// exponential backoff strategy.
+	DefaultBackoff time.Duration = 300 * time.Millisecond
+	// DefaultTimeout is a default max waiting time for the backend to process
+	// each span or metrics batch.
+	DefaultTimeout time.Duration = 10 * time.Second
+)
+
+type (
+	SignalConfig struct {
+		Endpoint    string
+		Insecure    bool
+		TLSCfg      *tls.Config
+		Headers     map[string]string
+		Compression Compression
+		Timeout     time.Duration
+		URLPath     string
+
+		// gRPC configurations
+		GRPCCredentials credentials.TransportCredentials
+
+		TemporalitySelector metric.TemporalitySelector
+		AggregationSelector metric.AggregationSelector
+	}
+
+	Config struct {
+		// Signal specific configurations
+		Metrics SignalConfig
+
+		RetryConfig retry.Config
+
+		// gRPC configurations
+		ReconnectionPeriod time.Duration
+		ServiceConfig      string
+		DialOptions        []grpc.DialOption
+		GRPCConn           *grpc.ClientConn
+	}
+)
+
+// NewHTTPConfig returns a new Config with all settings applied from opts and
+// any unset setting using the default HTTP config values.
+func NewHTTPConfig(opts ...HTTPOption) Config {
+	cfg := Config{
+		Metrics: SignalConfig{
+			Endpoint:    fmt.Sprintf("%s:%d", DefaultCollectorHost, DefaultCollectorHTTPPort),
+			URLPath:     DefaultMetricsPath,
+			Compression: NoCompression,
+			Timeout:     DefaultTimeout,
+
+			TemporalitySelector: metric.DefaultTemporalitySelector,
+			AggregationSelector: metric.DefaultAggregationSelector,
+		},
+		RetryConfig: retry.DefaultConfig,
+	}
+	cfg = ApplyHTTPEnvConfigs(cfg)
+	for _, opt := range opts {
+		cfg = opt.ApplyHTTPOption(cfg)
+	}
+	cfg.Metrics.URLPath = cleanPath(cfg.Metrics.URLPath, DefaultMetricsPath)
+	return cfg
+}
+
+// cleanPath returns a path with all spaces trimmed and all redundancies
+// removed. If urlPath is empty or cleaning it results in an empty string,
+// defaultPath is returned instead.
+func cleanPath(urlPath string, defaultPath string) string {
+	tmp := path.Clean(strings.TrimSpace(urlPath))
+	if tmp == "." {
+		return defaultPath
+	}
+	if !path.IsAbs(tmp) {
+		tmp = fmt.Sprintf("/%s", tmp)
+	}
+	return tmp
+}
+
+// NewGRPCConfig returns a new Config with all settings applied from opts and
+// any unset setting using the default gRPC config values.
+func NewGRPCConfig(opts ...GRPCOption) Config {
+	userAgent := "OTel OTLP Exporter Go/" + otlpmetric.Version()
+	cfg := Config{
+		Metrics: SignalConfig{
+			Endpoint:    fmt.Sprintf("%s:%d", DefaultCollectorHost, DefaultCollectorGRPCPort),
+			URLPath:     DefaultMetricsPath,
+			Compression: NoCompression,
+			Timeout:     DefaultTimeout,
+
+			TemporalitySelector: metric.DefaultTemporalitySelector,
+			AggregationSelector: metric.DefaultAggregationSelector,
+		},
+		RetryConfig: retry.DefaultConfig,
+		DialOptions: []grpc.DialOption{grpc.WithUserAgent(userAgent)},
+	}
+	cfg = ApplyGRPCEnvConfigs(cfg)
+	for _, opt := range opts {
+		cfg = opt.ApplyGRPCOption(cfg)
+	}
+
+	if cfg.ServiceConfig != "" {
+		cfg.DialOptions = append(cfg.DialOptions, grpc.WithDefaultServiceConfig(cfg.ServiceConfig))
+	}
+	// Priroritize GRPCCredentials over Insecure (passing both is an error).
+	if cfg.Metrics.GRPCCredentials != nil {
+		cfg.DialOptions = append(cfg.DialOptions, grpc.WithTransportCredentials(cfg.Metrics.GRPCCredentials))
+	} else if cfg.Metrics.Insecure {
+		cfg.DialOptions = append(cfg.DialOptions, grpc.WithTransportCredentials(insecure.NewCredentials()))
+	} else {
+		// Default to using the host's root CA.
+		creds := credentials.NewTLS(nil)
+		cfg.Metrics.GRPCCredentials = creds
+		cfg.DialOptions = append(cfg.DialOptions, grpc.WithTransportCredentials(creds))
+	}
+	if cfg.Metrics.Compression == GzipCompression {
+		cfg.DialOptions = append(cfg.DialOptions, grpc.WithDefaultCallOptions(grpc.UseCompressor(gzip.Name)))
+	}
+	if len(cfg.DialOptions) != 0 {
+		cfg.DialOptions = append(cfg.DialOptions, cfg.DialOptions...)
+	}
+	if cfg.ReconnectionPeriod != 0 {
+		p := grpc.ConnectParams{
+			Backoff:           backoff.DefaultConfig,
+			MinConnectTimeout: cfg.ReconnectionPeriod,
+		}
+		cfg.DialOptions = append(cfg.DialOptions, grpc.WithConnectParams(p))
+	}
+
+	return cfg
+}
+
+type (
+	// GenericOption applies an option to the HTTP or gRPC driver.
+	GenericOption interface {
+		ApplyHTTPOption(Config) Config
+		ApplyGRPCOption(Config) Config
+
+		// A private method to prevent users implementing the
+		// interface and so future additions to it will not
+		// violate compatibility.
+		private()
+	}
+
+	// HTTPOption applies an option to the HTTP driver.
+	HTTPOption interface {
+		ApplyHTTPOption(Config) Config
+
+		// A private method to prevent users implementing the
+		// interface and so future additions to it will not
+		// violate compatibility.
+		private()
+	}
+
+	// GRPCOption applies an option to the gRPC driver.
+	GRPCOption interface {
+		ApplyGRPCOption(Config) Config
+
+		// A private method to prevent users implementing the
+		// interface and so future additions to it will not
+		// violate compatibility.
+		private()
+	}
+)
+
+// genericOption is an option that applies the same logic
+// for both gRPC and HTTP.
+type genericOption struct {
+	fn func(Config) Config
+}
+
+func (g *genericOption) ApplyGRPCOption(cfg Config) Config {
+	return g.fn(cfg)
+}
+
+func (g *genericOption) ApplyHTTPOption(cfg Config) Config {
+	return g.fn(cfg)
+}
+
+func (genericOption) private() {}
+
+func newGenericOption(fn func(cfg Config) Config) GenericOption {
+	return &genericOption{fn: fn}
+}
+
+// splitOption is an option that applies different logics
+// for gRPC and HTTP.
+type splitOption struct {
+	httpFn func(Config) Config
+	grpcFn func(Config) Config
+}
+
+func (g *splitOption) ApplyGRPCOption(cfg Config) Config {
+	return g.grpcFn(cfg)
+}
+
+func (g *splitOption) ApplyHTTPOption(cfg Config) Config {
+	return g.httpFn(cfg)
+}
+
+func (splitOption) private() {}
+
+func newSplitOption(httpFn func(cfg Config) Config, grpcFn func(cfg Config) Config) GenericOption {
+	return &splitOption{httpFn: httpFn, grpcFn: grpcFn}
+}
+
+// httpOption is an option that is only applied to the HTTP driver.
+type httpOption struct {
+	fn func(Config) Config
+}
+
+func (h *httpOption) ApplyHTTPOption(cfg Config) Config {
+	return h.fn(cfg)
+}
+
+func (httpOption) private() {}
+
+func NewHTTPOption(fn func(cfg Config) Config) HTTPOption {
+	return &httpOption{fn: fn}
+}
+
+// grpcOption is an option that is only applied to the gRPC driver.
+type grpcOption struct {
+	fn func(Config) Config
+}
+
+func (h *grpcOption) ApplyGRPCOption(cfg Config) Config {
+	return h.fn(cfg)
+}
+
+func (grpcOption) private() {}
+
+func NewGRPCOption(fn func(cfg Config) Config) GRPCOption {
+	return &grpcOption{fn: fn}
+}
+
+// Generic Options
+
+func WithEndpoint(endpoint string) GenericOption {
+	return newGenericOption(func(cfg Config) Config {
+		cfg.Metrics.Endpoint = endpoint
+		return cfg
+	})
+}
+
+func WithCompression(compression Compression) GenericOption {
+	return newGenericOption(func(cfg Config) Config {
+		cfg.Metrics.Compression = compression
+		return cfg
+	})
+}
+
+func WithURLPath(urlPath string) GenericOption {
+	return newGenericOption(func(cfg Config) Config {
+		cfg.Metrics.URLPath = urlPath
+		return cfg
+	})
+}
+
+func WithRetry(rc retry.Config) GenericOption {
+	return newGenericOption(func(cfg Config) Config {
+		cfg.RetryConfig = rc
+		return cfg
+	})
+}
+
+func WithTLSClientConfig(tlsCfg *tls.Config) GenericOption {
+	return newSplitOption(func(cfg Config) Config {
+		cfg.Metrics.TLSCfg = tlsCfg.Clone()
+		return cfg
+	}, func(cfg Config) Config {
+		cfg.Metrics.GRPCCredentials = credentials.NewTLS(tlsCfg)
+		return cfg
+	})
+}
+
+func WithInsecure() GenericOption {
+	return newGenericOption(func(cfg Config) Config {
+		cfg.Metrics.Insecure = true
+		return cfg
+	})
+}
+
+func WithSecure() GenericOption {
+	return newGenericOption(func(cfg Config) Config {
+		cfg.Metrics.Insecure = false
+		return cfg
+	})
+}
+
+func WithHeaders(headers map[string]string) GenericOption {
+	return newGenericOption(func(cfg Config) Config {
+		cfg.Metrics.Headers = headers
+		return cfg
+	})
+}
+
+func WithTimeout(duration time.Duration) GenericOption {
+	return newGenericOption(func(cfg Config) Config {
+		cfg.Metrics.Timeout = duration
+		return cfg
+	})
+}
+
+func WithTemporalitySelector(selector metric.TemporalitySelector) GenericOption {
+	return newGenericOption(func(cfg Config) Config {
+		cfg.Metrics.TemporalitySelector = selector
+		return cfg
+	})
+}
+
+func WithAggregationSelector(selector metric.AggregationSelector) GenericOption {
+	return newGenericOption(func(cfg Config) Config {
+		cfg.Metrics.AggregationSelector = selector
+		return cfg
+	})
+}

vendor/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/optiontypes.go

@@ -0,0 +1,58 @@
+// Code created by gotmpl. DO NOT MODIFY.
+// source: internal/shared/otlp/otlpmetric/oconf/optiontypes.go.tmpl
+
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package oconf // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf"
+
+import "time"
+
+const (
+	// DefaultCollectorGRPCPort is the default gRPC port of the collector.
+	DefaultCollectorGRPCPort uint16 = 4317
+	// DefaultCollectorHTTPPort is the default HTTP port of the collector.
+	DefaultCollectorHTTPPort uint16 = 4318
+	// DefaultCollectorHost is the host address the Exporter will attempt
+	// connect to if no collector address is provided.
+	DefaultCollectorHost string = "localhost"
+)
+
+// Compression describes the compression used for payloads sent to the
+// collector.
+type Compression int
+
+const (
+	// NoCompression tells the driver to send payloads without
+	// compression.
+	NoCompression Compression = iota
+	// GzipCompression tells the driver to send payloads after
+	// compressing them with gzip.
+	GzipCompression
+)
+
+// RetrySettings defines configuration for retrying batches in case of export failure
+// using an exponential backoff.
+type RetrySettings struct {
+	// Enabled indicates whether to not retry sending batches in case of export failure.
+	Enabled bool
+	// InitialInterval the time to wait after the first failure before retrying.
+	InitialInterval time.Duration
+	// MaxInterval is the upper bound on backoff interval. Once this value is reached the delay between
+	// consecutive retries will always be `MaxInterval`.
+	MaxInterval time.Duration
+	// MaxElapsedTime is the maximum amount of time (including retries) spent trying to send a request/batch.
+	// Once this value is reached, the data is discarded.
+	MaxElapsedTime time.Duration
+}

vendor/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/tls.go

@@ -0,0 +1,49 @@
+// Code created by gotmpl. DO NOT MODIFY.
+// source: internal/shared/otlp/otlpmetric/oconf/tls.go.tmpl
+
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package oconf // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf"
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+	"errors"
+	"os"
+)
+
+// ReadTLSConfigFromFile reads a PEM certificate file and creates
+// a tls.Config that will use this certifate to verify a server certificate.
+func ReadTLSConfigFromFile(path string) (*tls.Config, error) {
+	b, err := os.ReadFile(path)
+	if err != nil {
+		return nil, err
+	}
+
+	return CreateTLSConfig(b)
+}
+
+// CreateTLSConfig creates a tls.Config from a raw certificate bytes
+// to verify a server certificate.
+func CreateTLSConfig(certBytes []byte) (*tls.Config, error) {
+	cp := x509.NewCertPool()
+	if ok := cp.AppendCertsFromPEM(certBytes); !ok {
+		return nil, errors.New("failed to append certificate to the cert pool")
+	}
+
+	return &tls.Config{
+		RootCAs: cp,
+	}, nil
+}

vendor/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/partialsuccess.go

@@ -0,0 +1,67 @@
+// Code created by gotmpl. DO NOT MODIFY.
+// source: internal/shared/otlp/partialsuccess.go
+
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package internal // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal"
+
+import "fmt"
+
+// PartialSuccess represents the underlying error for all handling
+// OTLP partial success messages.  Use `errors.Is(err,
+// PartialSuccess{})` to test whether an error passed to the OTel
+// error handler belongs to this category.
+type PartialSuccess struct {
+	ErrorMessage  string
+	RejectedItems int64
+	RejectedKind  string
+}
+
+var _ error = PartialSuccess{}
+
+// Error implements the error interface.
+func (ps PartialSuccess) Error() string {
+	msg := ps.ErrorMessage
+	if msg == "" {
+		msg = "empty message"
+	}
+	return fmt.Sprintf("OTLP partial success: %s (%d %s rejected)", msg, ps.RejectedItems, ps.RejectedKind)
+}
+
+// Is supports the errors.Is() interface.
+func (ps PartialSuccess) Is(err error) bool {
+	_, ok := err.(PartialSuccess)
+	return ok
+}
+
+// TracePartialSuccessError returns an error describing a partial success
+// response for the trace signal.
+func TracePartialSuccessError(itemsRejected int64, errorMessage string) error {
+	return PartialSuccess{
+		ErrorMessage:  errorMessage,
+		RejectedItems: itemsRejected,
+		RejectedKind:  "spans",
+	}
+}
+
+// MetricPartialSuccessError returns an error describing a partial success
+// response for the metric signal.
+func MetricPartialSuccessError(itemsRejected int64, errorMessage string) error {
+	return PartialSuccess{
+		ErrorMessage:  errorMessage,
+		RejectedItems: itemsRejected,
+		RejectedKind:  "metric data points",
+	}
+}

vendor/go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/retry/retry.go

@@ -0,0 +1,156 @@
+// Code created by gotmpl. DO NOT MODIFY.
+// source: internal/shared/otlp/retry/retry.go.tmpl
+
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package retry provides request retry functionality that can perform
+// configurable exponential backoff for transient errors and honor any
+// explicit throttle responses received.
+package retry // import "go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc/internal/retry"
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/cenkalti/backoff/v4"
+)
+
+// DefaultConfig are the recommended defaults to use.
+var DefaultConfig = Config{
+	Enabled:         true,
+	InitialInterval: 5 * time.Second,
+	MaxInterval:     30 * time.Second,
+	MaxElapsedTime:  time.Minute,
+}
+
+// Config defines configuration for retrying batches in case of export failure
+// using an exponential backoff.
+type Config struct {
+	// Enabled indicates whether to not retry sending batches in case of
+	// export failure.
+	Enabled bool
+	// InitialInterval the time to wait after the first failure before
+	// retrying.
+	InitialInterval time.Duration
+	// MaxInterval is the upper bound on backoff interval. Once this value is
+	// reached the delay between consecutive retries will always be
+	// `MaxInterval`.
+	MaxInterval time.Duration
+	// MaxElapsedTime is the maximum amount of time (including retries) spent
+	// trying to send a request/batch.  Once this value is reached, the data
+	// is discarded.
+	MaxElapsedTime time.Duration
+}
+
+// RequestFunc wraps a request with retry logic.
+type RequestFunc func(context.Context, func(context.Context) error) error
+
+// EvaluateFunc returns if an error is retry-able and if an explicit throttle
+// duration should be honored that was included in the error.
+//
+// The function must return true if the error argument is retry-able,
+// otherwise it must return false for the first return parameter.
+//
+// The function must return a non-zero time.Duration if the error contains
+// explicit throttle duration that should be honored, otherwise it must return
+// a zero valued time.Duration.
+type EvaluateFunc func(error) (bool, time.Duration)
+
+// RequestFunc returns a RequestFunc using the evaluate function to determine
+// if requests can be retried and based on the exponential backoff
+// configuration of c.
+func (c Config) RequestFunc(evaluate EvaluateFunc) RequestFunc {
+	if !c.Enabled {
+		return func(ctx context.Context, fn func(context.Context) error) error {
+			return fn(ctx)
+		}
+	}
+
+	return func(ctx context.Context, fn func(context.Context) error) error {
+		// Do not use NewExponentialBackOff since it calls Reset and the code here
+		// must call Reset after changing the InitialInterval (this saves an
+		// unnecessary call to Now).
+		b := &backoff.ExponentialBackOff{
+			InitialInterval:     c.InitialInterval,
+			RandomizationFactor: backoff.DefaultRandomizationFactor,
+			Multiplier:          backoff.DefaultMultiplier,
+			MaxInterval:         c.MaxInterval,
+			MaxElapsedTime:      c.MaxElapsedTime,
+			Stop:                backoff.Stop,
+			Clock:               backoff.SystemClock,
+		}
+		b.Reset()
+
+		for {
+			err := fn(ctx)
+			if err == nil {
+				return nil
+			}
+
+			retryable, throttle := evaluate(err)
+			if !retryable {
+				return err
+			}
+
+			bOff := b.NextBackOff()
+			if bOff == backoff.Stop {
+				return fmt.Errorf("max retry time elapsed: %w", err)
+			}
+
+			// Wait for the greater of the backoff or throttle delay.
+			var delay time.Duration
+			if bOff > throttle {
+				delay = bOff
+			} else {
+				elapsed := b.GetElapsedTime()
+				if b.MaxElapsedTime != 0 && elapsed+throttle > b.MaxElapsedTime {
+					return fmt.Errorf("max retry time would elapse: %w", err)
+				}
+				delay = throttle
+			}
+
+			if ctxErr := waitFunc(ctx, delay); ctxErr != nil {
+				return fmt.Errorf("%w: %s", ctxErr, err)
+			}
+		}
+	}
+}
+
+// Allow override for testing.
+var waitFunc = wait
+
+// wait takes the caller's context, and the amount of time to wait.  It will
+// return nil if the timer fires before or at the same time as the context's
+// deadline.  This indicates that the call can be retried.
+func wait(ctx context.Context, delay time.Duration) error {
+	timer := time.NewTimer(delay)
+	defer timer.Stop()
+
+	select {
+	case <-ctx.Done():
+		// Handle the case where the timer and context deadline end
+		// simultaneously by prioritizing the timer expiration nil value
+		// response.
+		select {
+		case <-timer.C:
+		default:
+			return ctx.Err()
+		}
+	case <-timer.C:
+	}
+
+	return nil
+}