Add redis client only instrumentation (open-telemetry#3143)

* Rough draft of the contribution

* Add connection instrumentation based on the existing pattern.

add a helper function assert_span_count to simplify tests
add unit tests for pipeline hooks

* fix tests to use fake redis

* replace the redis version checks with defines

* Adjust comment and fix one test

* Update documentation with the client method

* Update the changelog

* Update the HTTPX readme to point to proper class method

* Add back the assert_span_count method

* Move the changelog update to the unreleased section

* Remove extra whitespace in the Changelog

* Fix linter complaints

* Remove hasattr assert

* Move the Changelog to Unreleased

* Review comments. Move types to types.py, move some functions to util.py. Tested and verified docs.

* Fix type compatibility

* fix typing and lint

---------

Co-authored-by: Riccardo Magliocchetti <[email protected]>
Co-authored-by: Emídio Neto <[email protected]>

Author: 3 people

CHANGELOG.md

@@ -13,6 +13,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- `opentelemetry-instrumentation-redis` Add support for redis client-specific instrumentation.
+  ([#3143](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3143))
+
 ### Fixed
 
 - `opentelemetry-instrumentation` Catch `ModuleNotFoundError` when the library is not installed
@@ -31,6 +34,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - `opentelemetry-instrumentation-botocore` Capture server attributes for botocore API calls
   ([#3448](https://github.com/open-telemetry/opentelemetry-python-contrib/pull/3448))
 
+
 ## Version 1.32.0/0.53b0 (2025-04-10)
 
 ### Added

docs/conf.py

@@ -122,6 +122,7 @@
         "https://opentelemetry-python.readthedocs.io/en/latest/",
         None,
     ),
+    "redis": ("https://redis-py.readthedocs.io/en/latest/", None),
 }
 
 # http://www.sphinx-doc.org/en/master/config.html#confval-nitpicky

docs/instrumentation/redis/redis.rst

@@ -1,7 +1,10 @@
-OpenTelemetry Redis Instrumentation
-===================================
+.. include:: ../../../instrumentation/opentelemetry-instrumentation-redis/README.rst
+    :end-before: References
+
+Usage
+-----
 
 .. automodule:: opentelemetry.instrumentation.redis
     :members:
     :undoc-members:
-    :show-inheritance:
+    :show-inheritance:

instrumentation/opentelemetry-instrumentation-httpx/README.rst

@@ -48,7 +48,7 @@ Instrumenting single clients
 ****************************
 
 If you only want to instrument requests for specific client instances, you can
-use the `instrument_client` method.
+use the `HTTPXClientInstrumentor.instrument_client` method.
 
 
 .. code-block:: python