vendor: update buildkit to opentelemetry support

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>

vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/LICENSE

@@ -0,0 +1,201 @@
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+
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vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/client.go

@@ -0,0 +1,280 @@
+// 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 otlptracehttp
+
+import (
+	"bytes"
+	"compress/gzip"
+	"context"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"math/rand"
+	"net"
+	"net/http"
+	"path"
+	"strings"
+	"time"
+
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace"
+	tracepb "go.opentelemetry.io/proto/otlp/trace/v1"
+
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/otlpconfig"
+
+	"google.golang.org/protobuf/proto"
+
+	"go.opentelemetry.io/otel"
+	coltracepb "go.opentelemetry.io/proto/otlp/collector/trace/v1"
+)
+
+const contentTypeProto = "application/x-protobuf"
+
+// Keep it in sync with golang's DefaultTransport from net/http! We
+// have our own copy to avoid handling a situation where the
+// DefaultTransport is overwritten with some different implementation
+// of http.RoundTripper or it's modified by other package.
+var ourTransport = &http.Transport{
+	Proxy: http.ProxyFromEnvironment,
+	DialContext: (&net.Dialer{
+		Timeout:   30 * time.Second,
+		KeepAlive: 30 * time.Second,
+	}).DialContext,
+	ForceAttemptHTTP2:     true,
+	MaxIdleConns:          100,
+	IdleConnTimeout:       90 * time.Second,
+	TLSHandshakeTimeout:   10 * time.Second,
+	ExpectContinueTimeout: 1 * time.Second,
+}
+
+type client struct {
+	name       string
+	cfg        otlpconfig.SignalConfig
+	generalCfg otlpconfig.Config
+	client     *http.Client
+	stopCh     chan struct{}
+}
+
+var _ otlptrace.Client = (*client)(nil)
+
+// NewClient creates a new HTTP trace client.
+func NewClient(opts ...Option) otlptrace.Client {
+	cfg := otlpconfig.NewDefaultConfig()
+	otlpconfig.ApplyHTTPEnvConfigs(&cfg)
+	for _, opt := range opts {
+		opt.applyHTTPOption(&cfg)
+	}
+
+	for pathPtr, defaultPath := range map[*string]string{
+		&cfg.Traces.URLPath: defaultTracesPath,
+	} {
+		tmp := strings.TrimSpace(*pathPtr)
+		if tmp == "" {
+			tmp = defaultPath
+		} else {
+			tmp = path.Clean(tmp)
+			if !path.IsAbs(tmp) {
+				tmp = fmt.Sprintf("/%s", tmp)
+			}
+		}
+		*pathPtr = tmp
+	}
+	if cfg.MaxAttempts <= 0 {
+		cfg.MaxAttempts = defaultMaxAttempts
+	}
+	if cfg.MaxAttempts > defaultMaxAttempts {
+		cfg.MaxAttempts = defaultMaxAttempts
+	}
+	if cfg.Backoff <= 0 {
+		cfg.Backoff = defaultBackoff
+	}
+
+	httpClient := &http.Client{
+		Transport: ourTransport,
+		Timeout:   cfg.Traces.Timeout,
+	}
+	if cfg.Traces.TLSCfg != nil {
+		transport := ourTransport.Clone()
+		transport.TLSClientConfig = cfg.Traces.TLSCfg
+		httpClient.Transport = transport
+	}
+
+	stopCh := make(chan struct{})
+	return &client{
+		name:       "traces",
+		cfg:        cfg.Traces,
+		generalCfg: cfg,
+		stopCh:     stopCh,
+		client:     httpClient,
+	}
+}
+
+// Start does nothing in a HTTP client
+func (d *client) Start(ctx context.Context) error {
+	// nothing to do
+	select {
+	case <-ctx.Done():
+		return ctx.Err()
+	default:
+	}
+	return nil
+}
+
+// Stop shuts down the client and interrupt any in-flight request.
+func (d *client) Stop(ctx context.Context) error {
+	close(d.stopCh)
+	select {
+	case <-ctx.Done():
+		return ctx.Err()
+	default:
+	}
+	return nil
+}
+
+// UploadTraces sends a batch of spans to the collector.
+func (d *client) UploadTraces(ctx context.Context, protoSpans []*tracepb.ResourceSpans) error {
+	pbRequest := &coltracepb.ExportTraceServiceRequest{
+		ResourceSpans: protoSpans,
+	}
+	rawRequest, err := proto.Marshal(pbRequest)
+	if err != nil {
+		return err
+	}
+	return d.send(ctx, rawRequest)
+}
+
+func (d *client) send(ctx context.Context, rawRequest []byte) error {
+	address := fmt.Sprintf("%s://%s%s", d.getScheme(), d.cfg.Endpoint, d.cfg.URLPath)
+	var cancel context.CancelFunc
+	ctx, cancel = d.contextWithStop(ctx)
+	defer cancel()
+	for i := 0; i < d.generalCfg.MaxAttempts; i++ {
+		response, err := d.singleSend(ctx, rawRequest, address)
+		if err != nil {
+			return err
+		}
+		// We don't care about the body, so try to read it
+		// into /dev/null and close it immediately. The
+		// reading part is to facilitate connection reuse.
+		_, _ = io.Copy(ioutil.Discard, response.Body)
+		_ = response.Body.Close()
+		switch response.StatusCode {
+		case http.StatusOK:
+			return nil
+		case http.StatusTooManyRequests:
+			fallthrough
+		case http.StatusServiceUnavailable:
+			select {
+			case <-time.After(getWaitDuration(d.generalCfg.Backoff, i)):
+				continue
+			case <-ctx.Done():
+				return ctx.Err()
+			}
+		default:
+			return fmt.Errorf("failed to send %s to %s with HTTP status %s", d.name, address, response.Status)
+		}
+	}
+	return fmt.Errorf("failed to send data to %s after %d tries", address, d.generalCfg.MaxAttempts)
+}
+
+func (d *client) getScheme() string {
+	if d.cfg.Insecure {
+		return "http"
+	}
+	return "https"
+}
+
+func getWaitDuration(backoff time.Duration, i int) time.Duration {
+	// Strategy: after nth failed attempt, attempt resending after
+	// k * initialBackoff + jitter, where k is a random number in
+	// range [0, 2^n-1), and jitter is a random percentage of
+	// initialBackoff from [-5%, 5%).
+	//
+	// Based on
+	// https://en.wikipedia.org/wiki/Exponential_backoff#Example_exponential_backoff_algorithm
+	//
+	// Jitter is our addition.
+
+	// There won't be an overflow, since i is capped to
+	// defaultMaxAttempts (5).
+	upperK := (int64)(1) << (i + 1)
+	jitterPercent := (rand.Float64() - 0.5) / 10.
+	jitter := jitterPercent * (float64)(backoff)
+	k := rand.Int63n(upperK)
+	return (time.Duration)(k)*backoff + (time.Duration)(jitter)
+}
+
+func (d *client) contextWithStop(ctx context.Context) (context.Context, context.CancelFunc) {
+	// Unify the parent context Done signal with the client's stop
+	// channel.
+	ctx, cancel := context.WithCancel(ctx)
+	go func(ctx context.Context, cancel context.CancelFunc) {
+		select {
+		case <-ctx.Done():
+			// Nothing to do, either cancelled or deadline
+			// happened.
+		case <-d.stopCh:
+			cancel()
+		}
+	}(ctx, cancel)
+	return ctx, cancel
+}
+
+func (d *client) singleSend(ctx context.Context, rawRequest []byte, address string) (*http.Response, error) {
+	request, err := http.NewRequestWithContext(ctx, http.MethodPost, address, nil)
+	if err != nil {
+		return nil, err
+	}
+	bodyReader, contentLength, headers := d.prepareBody(rawRequest)
+	// Not closing bodyReader through defer, the HTTP Client's
+	// Transport will do it for us
+	request.Body = bodyReader
+	request.ContentLength = contentLength
+	for key, values := range headers {
+		for _, value := range values {
+			request.Header.Add(key, value)
+		}
+	}
+	return d.client.Do(request)
+}
+
+func (d *client) prepareBody(rawRequest []byte) (io.ReadCloser, int64, http.Header) {
+	var bodyReader io.ReadCloser
+	headers := http.Header{}
+	for k, v := range d.cfg.Headers {
+		headers.Set(k, v)
+	}
+	contentLength := (int64)(len(rawRequest))
+	headers.Set("Content-Type", contentTypeProto)
+	requestReader := bytes.NewBuffer(rawRequest)
+	switch Compression(d.cfg.Compression) {
+	case NoCompression:
+		bodyReader = ioutil.NopCloser(requestReader)
+	case GzipCompression:
+		preader, pwriter := io.Pipe()
+		go func() {
+			defer pwriter.Close()
+			gzipper := gzip.NewWriter(pwriter)
+			defer gzipper.Close()
+			_, err := io.Copy(gzipper, requestReader)
+			if err != nil {
+				otel.Handle(fmt.Errorf("otlphttp: failed to gzip request: %v", err))
+			}
+		}()
+		headers.Set("Content-Encoding", "gzip")
+		bodyReader = preader
+		contentLength = -1
+	}
+	return bodyReader, contentLength, headers
+}

vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/doc.go

@@ -0,0 +1,22 @@
+// 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 otlptracehttp a client that sends traces to the collector
+using HTTP with binary protobuf payloads.
+
+This package is currently in a Release Candidate phase. Backwards incompatible changes
+may be introduced prior to v1.0.0, but we believe the current API is ready to stabilize.
+*/
+package otlptracehttp // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp"

vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/exporter.go

@@ -0,0 +1,31 @@
+// 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 otlptracehttp // import "go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp"
+
+import (
+	"context"
+
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace"
+)
+
+// New constructs a new Exporter and starts it.
+func New(ctx context.Context, opts ...Option) (*otlptrace.Exporter, error) {
+	return otlptrace.New(ctx, NewClient(opts...))
+}
+
+// NewUnstarted constructs a new Exporter and does not start it.
+func NewUnstarted(opts ...Option) *otlptrace.Exporter {
+	return otlptrace.NewUnstarted(NewClient(opts...))
+}

vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/go.mod

@@ -0,0 +1,75 @@
+module go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp
+
+go 1.15
+
+require (
+	github.com/stretchr/testify v1.7.0
+	go.opentelemetry.io/otel v1.0.0-RC1
+	go.opentelemetry.io/otel/exporters/otlp/otlptrace v1.0.0-RC1
+	go.opentelemetry.io/proto/otlp v0.9.0
+	google.golang.org/protobuf v1.26.0
+)
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlptrace => ../
+
+replace go.opentelemetry.io/otel => ../../../..
+
+replace go.opentelemetry.io/otel/bridge/opencensus => ../../../../bridge/opencensus
+
+replace go.opentelemetry.io/otel/bridge/opentracing => ../../../../bridge/opentracing
+
+replace go.opentelemetry.io/otel/example/jaeger => ../../../../example/jaeger
+
+replace go.opentelemetry.io/otel/example/namedtracer => ../../../../example/namedtracer
+
+replace go.opentelemetry.io/otel/example/opencensus => ../../../../example/opencensus
+
+replace go.opentelemetry.io/otel/example/otel-collector => ../../../../example/otel-collector
+
+replace go.opentelemetry.io/otel/example/passthrough => ../../../../example/passthrough
+
+replace go.opentelemetry.io/otel/example/prom-collector => ../../../../example/prom-collector
+
+replace go.opentelemetry.io/otel/example/prometheus => ../../../../example/prometheus
+
+replace go.opentelemetry.io/otel/example/zipkin => ../../../../example/zipkin
+
+replace go.opentelemetry.io/otel/exporters/prometheus => ../../../prometheus
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracegrpc => ../otlptracegrpc
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp => ./
+
+replace go.opentelemetry.io/otel/exporters/jaeger => ../../../jaeger
+
+replace go.opentelemetry.io/otel/exporters/zipkin => ../../../zipkin
+
+replace go.opentelemetry.io/otel/internal/tools => ../../../../internal/tools
+
+replace go.opentelemetry.io/otel/metric => ../../../../metric
+
+replace go.opentelemetry.io/otel/oteltest => ../../../../oteltest
+
+replace go.opentelemetry.io/otel/sdk => ../../../../sdk
+
+replace go.opentelemetry.io/otel/sdk/export/metric => ../../../../sdk/export/metric
+
+replace go.opentelemetry.io/otel/sdk/metric => ../../../../sdk/metric
+
+replace go.opentelemetry.io/otel/trace => ../../../../trace
+
+replace go.opentelemetry.io/otel/internal/metric => ../../../../internal/metric
+
+replace go.opentelemetry.io/otel/exporters/metric/prometheus => ../../../metric/prometheus
+
+replace go.opentelemetry.io/otel/exporters/trace/jaeger => ../../../trace/jaeger
+
+replace go.opentelemetry.io/otel/exporters/trace/zipkin => ../../../trace/zipkin
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlpmetric => ../../otlpmetric
+
+replace go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc => ../../otlpmetric/otlpmetricgrpc
+
+replace go.opentelemetry.io/otel/exporters/stdout/stdoutmetric => ../../../stdout/stdoutmetric
+
+replace go.opentelemetry.io/otel/exporters/stdout/stdouttrace => ../../../stdout/stdouttrace

vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/go.sum

@@ -0,0 +1,122 @@
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vendor/go.opentelemetry.io/otel/exporters/otlp/otlptrace/otlptracehttp/options.go

@@ -0,0 +1,126 @@
+// 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 otlptracehttp
+
+import (
+	"crypto/tls"
+	"time"
+
+	"go.opentelemetry.io/otel/exporters/otlp/otlptrace/internal/otlpconfig"
+)
+
+const (
+	// defaultMaxAttempts describes how many times the driver
+	// should retry the sending of the payload in case of a
+	// retryable error.
+	defaultMaxAttempts int = 5
+	// defaultTracesPath is a default URL path for endpoint that
+	// receives spans.
+	defaultTracesPath string = "/v1/traces"
+	// defaultBackoff is a default base backoff time used in the
+	// exponential backoff strategy.
+	defaultBackoff time.Duration = 300 * time.Millisecond
+)
+
+// Compression describes the compression used for payloads sent to the
+// collector.
+type Compression otlpconfig.Compression
+
+const (
+	// NoCompression tells the driver to send payloads without
+	// compression.
+	NoCompression = Compression(otlpconfig.NoCompression)
+	// GzipCompression tells the driver to send payloads after
+	// compressing them with gzip.
+	GzipCompression = Compression(otlpconfig.GzipCompression)
+)
+
+// Option applies an option to the HTTP client.
+type Option interface {
+	applyHTTPOption(*otlpconfig.Config)
+}
+
+// RetrySettings defines configuration for retrying batches in case of export failure
+// using an exponential backoff.
+type RetrySettings otlpconfig.RetrySettings
+
+type wrappedOption struct {
+	otlpconfig.HTTPOption
+}
+
+func (w wrappedOption) applyHTTPOption(cfg *otlpconfig.Config) {
+	w.ApplyHTTPOption(cfg)
+}
+
+// WithEndpoint allows one to set the address of the collector
+// endpoint that the driver will use to send spans. If
+// unset, it will instead try to use
+// the default endpoint (localhost:4317). Note that the endpoint
+// must not contain any URL path.
+func WithEndpoint(endpoint string) Option {
+	return wrappedOption{otlpconfig.WithEndpoint(endpoint)}
+}
+
+// WithCompression tells the driver to compress the sent data.
+func WithCompression(compression Compression) Option {
+	return wrappedOption{otlpconfig.WithCompression(otlpconfig.Compression(compression))}
+}
+
+// WithURLPath allows one to override the default URL path used
+// for sending traces. If unset, default ("/v1/traces") will be used.
+func WithURLPath(urlPath string) Option {
+	return wrappedOption{otlpconfig.WithURLPath(urlPath)}
+}
+
+// WithMaxAttempts allows one to override how many times the driver
+// will try to send the payload in case of retryable errors.
+// The max attempts is limited to at most 5 retries. If unset,
+// default (5) will be used.
+func WithMaxAttempts(maxAttempts int) Option {
+	return wrappedOption{otlpconfig.WithMaxAttempts(maxAttempts)}
+}
+
+// WithBackoff tells the driver to use the duration as a base of the
+// exponential backoff strategy. If unset, default (300ms) will be
+// used.
+func WithBackoff(duration time.Duration) Option {
+	return wrappedOption{otlpconfig.WithBackoff(duration)}
+}
+
+// WithTLSClientConfig can be used to set up a custom TLS
+// configuration for the client used to send payloads to the
+// collector. Use it if you want to use a custom certificate.
+func WithTLSClientConfig(tlsCfg *tls.Config) Option {
+	return wrappedOption{otlpconfig.WithTLSClientConfig(tlsCfg)}
+}
+
+// WithInsecure tells the driver to connect to the collector using the
+// HTTP scheme, instead of HTTPS.
+func WithInsecure() Option {
+	return wrappedOption{otlpconfig.WithInsecure()}
+}
+
+// WithHeaders allows one to tell the driver to send additional HTTP
+// headers with the payloads. Specifying headers like Content-Length,
+// Content-Encoding and Content-Type may result in a broken driver.
+func WithHeaders(headers map[string]string) Option {
+	return wrappedOption{otlpconfig.WithHeaders(headers)}
+}
+
+// WithTimeout tells the driver the max waiting time for the backend to process
+// each spans batch.  If unset, the default will be 10 seconds.
+func WithTimeout(duration time.Duration) Option {
+	return wrappedOption{otlpconfig.WithTimeout(duration)}
+}