fix(instrumentation): add OTEL_SEMCONV_STABILITY_OPT_IN to CLI args (#4438)

* fix(instrumentation): add OTEL_SEMCONV_STABILITY_OPT_IN to CLI args

OTEL_SEMCONV_STABILITY_OPT_IN was not registered in environment_variables.py
so the opentelemetry-instrument CLI did not expose a --semconv_stability_opt_in
argument. Add the constant so the auto-instrumentation argument parser picks
it up through the opentelemetry_environment_variables entry-point.

Fixes #3965

Signed-off-by: alliasgher <alliasgher123@gmail.com>

* chore: add CHANGELOG entry for #4438

Signed-off-by: Ali <alliasgher123@gmail.com>

---------

Signed-off-by: alliasgher <alliasgher123@gmail.com>
Signed-off-by: Ali <alliasgher123@gmail.com>
Co-authored-by: Mike Goldsmith <goldsmith.mike@gmail.com>
Co-authored-by: Aaron Abbott <aaronabbott@google.com>

Author: 3 people

CHANGELOG.md

@@ -33,6 +33,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#3898](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3898))
 - `opentelemetry-instrumentation`: Add experimental metrics attributes Labeler utility
   ([#4288](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/4288))
+- `opentelemetry-instrumentation`: Register `OTEL_SEMCONV_STABILITY_OPT_IN` in `environment_variables.py` so `opentelemetry-instrument` exposes a `--semconv_stability_opt_in` CLI argument
+  ([#4438](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/4438))
 
 ### Fixed
 

opentelemetry-instrumentation/src/opentelemetry/instrumentation/environment_variables.py

@@ -22,3 +22,11 @@
 """
 .. envvar:: OTEL_PYTHON_AUTO_INSTRUMENTATION_EXPERIMENTAL_GEVENT_PATCH
 """
+
+OTEL_SEMCONV_STABILITY_OPT_IN = "OTEL_SEMCONV_STABILITY_OPT_IN"
+"""
+.. envvar:: OTEL_SEMCONV_STABILITY_OPT_IN
+
+Opt-in to stable semantic convention signals.
+Comma-separated list of signals, e.g. ``http``, ``http/dup``.
+"""