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otelhttp: Allow setting start time using context #6137

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merged 8 commits into from
Oct 21, 2024

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dashpole
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Fixes #5318

This allows overriding the start time for http server metrics and traces. See the linked issue for the motivation.

@dashpole dashpole requested review from dmathieu and a team as code owners September 21, 2024 18:51
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codecov bot commented Sep 21, 2024

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 66.6%. Comparing base (1c56a7c) to head (0f43e7a).
Report is 1 commits behind head on main.

Additional details and impacted files

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@@          Coverage Diff          @@
##            main   #6137   +/-   ##
=====================================
  Coverage   66.6%   66.6%           
=====================================
  Files        191     192    +1     
  Lines      15516   15525    +9     
=====================================
+ Hits       10345   10351    +6     
- Misses      4881    4883    +2     
- Partials     290     291    +1     
Files with missing lines Coverage Δ
instrumentation/net/http/otelhttp/handler.go 92.4% <100.0%> (+0.2%) ⬆️
...umentation/net/http/otelhttp/start_time_context.go 100.0% <100.0%> (ø)

... and 1 file with indirect coverage changes

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dashpole commented Oct 3, 2024

@open-telemetry/opamp-go-approvers this needs one more review if anyone has time

@pellared pellared changed the title Allow setting start time using go context for otelhttp otelhttp: Allow setting start time using context Oct 16, 2024
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minor nit comments only

@pellared pellared added this to the v1.32.0 milestone Oct 16, 2024
@dashpole dashpole merged commit b011c6d into open-telemetry:main Oct 21, 2024
25 checks passed
@dashpole dashpole deleted the otelhttp_start branch October 21, 2024 12:53
pellared added a commit that referenced this pull request Nov 8, 2024
### Added

- Add the `WithSource` option to the
`go.opentelemetry.io/contrib/bridges/otelslog` log bridge to set the
`code.*` attributes in the log record that includes the source location
where the record was emitted. (#6253)
- Add `ContextWithStartTime` and `StartTimeFromContext` to
`go.opentelemetry.io/contrib/instrumentation/net/http/otelhttp`, which
allows setting the start time using go context. (#6137)
- Set the `code.*` attributes in
`go.opentelemetry.io/contrib/bridges/otelzap` if the `zap.Logger` was
created with the `AddCaller` or `AddStacktrace` option. (#6268)
- Add a `LogProcessor` to
`go.opentelemetry.io/contrib/processors/baggagecopy` to copy baggage
members to log records. (#6277)
  - Use `baggagecopy.NewLogProcessor` when configuring a Log Provider.
- `NewLogProcessor` accepts a `Filter` function type that selects which
baggage members are added to the log record.

### Changed 

- Transform raw (`slog.KindAny`) attribute values to matching
`log.Value` types.
For example, `[]string{"foo", "bar"}` attribute value is now transformed
to `log.SliceValue(log.StringValue("foo"), log.StringValue("bar"))`
instead of `log.String("[foo bar"])`. (#6254)
- Upgrade `go.opentelemetry.io/otel/semconv/v1.17.0` to
`go.opentelemetry.io/otel/semconv/v1.21.0` in
`go.opentelemetry.io/contrib/instrumentation/go.mongodb.org/mongo-driver/mongo/otelmongo`.
(#6272)
- Resource doesn't merge with defaults if a valid resource is configured
in `go.opentelemetry.io/contrib/config`. (#6289)

### Fixed

- Transform nil attribute values to `log.Value` zero value instead of
panicking in `go.opentelemetry.io/contrib/bridges/otellogrus`. (#6237)
- Transform nil attribute values to `log.Value` zero value instead of
panicking in `go.opentelemetry.io/contrib/bridges/otelzap`. (#6237)
- Transform nil attribute values to `log.Value` zero value instead of
`log.StringValue("<nil>")` in
`go.opentelemetry.io/contrib/bridges/otelslog`. (#6246)
- Fix `NewClientHandler` so that `rpc.client.request.*` metrics measure
requests instead of responses and `rpc.client.responses.*` metrics
measure responses instead of requests in
`go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc`.
(#6250)
- Fix issue in `go.opentelemetry.io/contrib/config` causing
`otelprom.WithResourceAsConstantLabels` configuration to not be
respected. (#6260)
- `otel.Handle` is no longer called on a successful shutdown of the
Prometheus exporter in `go.opentelemetry.io/contrib/config`. (#6299)
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otelhttp: allow setting the start timestamp using go Context
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