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otel: include service instance id attribute to resource and move to metricutil package

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Add the service instance id to the resource attributes to prevent
downstream OTEL processors and exporters from thinking that the CLI
invocations are a single process that keeps restarting. The unique id
can be removed through downstream aggregation to prevent cardinality
issues, but we need some way to tell OTEL that it shouldn't reset the
counters.

Move the check for the experimental flag to its own package and then use
that invocation to prevent creating exporters so metrics are disabled
completely. This makes it so we don't have to check for the experimental
flag in every place we add metrics until we decide to make metrics
stable in general.

This also moves the OTEL initialization to a `util/metricutil` package
to be more consistent with the existing util naming and to differentiate
it from the upstream `metric` name. Using both `metrics` and `metric` as
import names was confusing since `metric` was an upstream dependency and
`metrics` was a local utility. `metricutil` matches with the existing
utilities and makes clear that it isn't a spelling mistake.

The record version metric has been removed since we weren't planning on
keeping that metric anyway and most of the information is now included
in the instrumentation library name and version. That function is
included as a utility in the `otel/sdk/metric` package to retrieve the
appropriate meter from the meter provider.

Signed-off-by: Jonathan A. Sternberg <jonathan.sternberg@docker.com>
This commit is contained in:
Jonathan A. Sternberg
2024-01-30 13:23:30 -06:00
parent 2c3d7dab3f
commit c65b7ed24f
7 changed files with 151 additions and 103 deletions
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2
go.mod
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@ -42,6 +42,7 @@ require (
go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc v0.42.0
go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetrichttp v0.42.0
go.opentelemetry.io/otel/metric v1.19.0
go.opentelemetry.io/otel/sdk v1.19.0
go.opentelemetry.io/otel/sdk/metric v1.19.0
go.opentelemetry.io/otel/trace v1.19.0
golang.org/x/mod v0.13.0
@ -147,7 +148,6 @@ require (
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/sdk v1.19.0 // indirect
go.opentelemetry.io/proto/otlp v1.0.0 // indirect
golang.org/x/crypto v0.17.0 // indirect
golang.org/x/exp v0.0.0-20230713183714-613f0c0eb8a1 // indirect