Update docs for entrypoints

docs/sdk/entry_points.rst

@@ -0,0 +1,76 @@
+Entry Points
+============
+
+OpenTelemetry Python uses Python's `entry points <https://setuptools.pypa.io/en/stable/userguide/entry_point.html>`_ mechanism to provide a pluggable architecture. Entry points allow you to register custom components (exporters, samplers, etc.) that can be discovered and loaded at runtime.
+
+Configuration
+-------------
+
+The SDK supports configuring entry points via environment variables by specifying the entry point name. For a complete list of supported environment variables, see :doc:`../api/environment_variables`.
+
+Entry Point Configuration Reference
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+.. list-table:: 
+   :header-rows: 1
+   :widths: 20 20 40 20
+
+   * - Environment Variable
+     - Entry Point Group
+     - Available Entrypoint Names
+     - Base Type
+   * - OTEL_LOGS_EXPORTER
+     - opentelemetry_logs_exporter  
+     - ``console``, ``otlp_proto_grpc``, ``otlp_proto_http``
+     - LogExporter
+   * - OTEL_METRICS_EXPORTER
+     - opentelemetry_metrics_exporter
+     - ``console``, ``otlp``, ``otlp_proto_grpc``, 
+       ``otlp_proto_http``, ``prometheus``
+     - :class:`MetricExporter <opentelemetry.sdk.metrics.export.MetricExporter>` or :class:`MetricReader <opentelemetry.sdk.metrics.export.MetricReader>`
+   * - OTEL_PROPAGATORS
+     - opentelemetry_propagator
+     - ``b3``, ``b3multi``, ``baggage``, 
+       ``jaeger``, ``tracecontext``
+     - :class:`TextMapPropagator <opentelemetry.propagators.textmap.TextMapPropagator>`
+   * - OTEL_TRACES_SAMPLER
+     - opentelemetry_traces_sampler
+     - ``always_off``, ``always_on``, ``parentbased_always_off``, 
+       ``parentbased_always_on``, ``parentbased_traceidratio``, ``traceidratio``
+     - :class:`Sampler <opentelemetry.sdk.trace.sampling.Sampler>`
+   * - OTEL_EXPERIMENTAL_RESOURCE_DETECTORS
+     - opentelemetry_resource_detector
+     - ``host``, ``os``, ``otel``, ``process``
+     - :class:`ResourceDetector <opentelemetry.sdk.resources.ResourceDetector>`
+   * - OTEL_PYTHON_ID_GENERATOR
+     - opentelemetry_id_generator
+     - ``random``
+     - :class:`IdGenerator <opentelemetry.sdk.trace.id_generator.IdGenerator>`
+   * - OTEL_TRACES_EXPORTER
+     - opentelemetry_traces_exporter
+     - ``console``, ``otlp``, ``otlp_proto_grpc``, ``otlp_proto_http``, 
+       ``zipkin``, ``zipkin_json``, ``zipkin_proto``
+     - :class:`SpanExporter <opentelemetry.sdk.trace.export.SpanExporter>`
+   * - OTEL_PYTHON_TRACER_PROVIDER
+     - opentelemetry_tracer_provider
+     - ``default_tracer_provider``, ``sdk_tracer_provider``
+     - :class:`TracerProvider <opentelemetry.trace.TracerProvider>`
+   * - OTEL_PYTHON_METER_PROVIDER
+     - opentelemetry_meter_provider
+     - ``default_meter_provider``, ``sdk_meter_provider``
+     - :class:`MeterProvider <opentelemetry.metrics.MeterProvider>`
+   * - OTEL_PYTHON_LOGGER_PROVIDER
+     - opentelemetry_logger_provider
+     - ``default_logger_provider``, ``sdk_logger_provider``
+     - :class:`LoggerProvider <opentelemetry._logs.LoggerProvider>`
+   * - OTEL_PYTHON_EVENT_LOGGER_PROVIDER
+     - opentelemetry_event_logger_provider
+     - ``default_event_logger_provider``
+     - *No implementations available*
+
+See Also
+--------
+
+* :doc:`trace` - Trace SDK documentation
+* :doc:`metrics` - Metrics SDK documentation  
+* :doc:`environment_variables` - Environment variable reference 

docs/sdk/index.rst

@@ -12,3 +12,4 @@ OpenTelemetry Python SDK
     metrics
     error_handler
     environment_variables
+    entry_points