Propose way to customize exporters.

exporter/opentelemetry-exporter-otlp-customizer/README.rst

@@ -0,0 +1 @@
+Customizer base class for OTLP exporters.

exporter/opentelemetry-exporter-otlp-customizer/pyproject.toml

@@ -0,0 +1,52 @@
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[project]
+name = "opentelemetry-exporter-otlp-customizer"
+dynamic = ["version"]
+description = "OpenTelemetry Collector Protobuf over gRPC Exporter"
+readme = "README.rst"
+license = {text = "Apache-2.0"}
+requires-python = ">=3.8"
+authors = [
+  { name = "OpenTelemetry Authors", email = "[email protected]" },
+]
+classifiers = [
+  "Development Status :: 5 - Production/Stable",
+  "Framework :: OpenTelemetry",
+  "Framework :: OpenTelemetry :: Exporters",
+  "Intended Audience :: Developers",
+  "License :: OSI Approved :: Apache Software License",
+  "Programming Language :: Python",
+  "Programming Language :: Python :: 3",
+  "Programming Language :: Python :: 3.8",
+  "Programming Language :: Python :: 3.9",
+  "Programming Language :: Python :: 3.10",
+  "Programming Language :: Python :: 3.11",
+  "Programming Language :: Python :: 3.12",
+  "Programming Language :: Python :: 3.13",
+]
+dependencies = [
+  "opentelemetry-exporter-otlp-proto-grpc == 1.30.0",
+  "opentelemetry-exporter-otlp-proto-http == 1.30.0",
+]
+
+[project.entry-points.opentelemetry_exporter_otlp_customizer]
+otlp = "opentelemetry.exporter.otlp.customizer:OTLPExporterCustomizerBase"
+
+[project.urls]
+Homepage = "https://github.com/open-telemetry/opentelemetry-python/tree/main/exporter/opentelemetry-exporter-otlp-proto-grpc"
+Repository = "https://github.com/open-telemetry/opentelemetry-python"
+
+[tool.hatch.version]
+path = "src/opentelemetry/exporter/otlp/customizer/version/__init__.py"
+
+[tool.hatch.build.targets.sdist]
+include = [
+  "/src",
+  "/tests",
+]
+
+[tool.hatch.build.targets.wheel]
+packages = ["src/opentelemetry"]

exporter/opentelemetry-exporter-otlp-customizer/src/opentelemetry/exporter/otlp/customizer/__init__.py

@@ -0,0 +1,23 @@
+from abc import ABC
+from typing import Union
+
+from opentelemetry.exporter.otlp.proto.http._log_exporter import (
+    OTLPLogExporter,
+)
+from opentelemetry.exporter.otlp.proto.http.metric_exporter import (
+    OTLPMetricExporter,
+)
+from opentelemetry.exporter.otlp.proto.http.trace_exporter import (
+    OTLPSpanExporter,
+)
+
+# TODO: import grpc exporters.
+
+BaseOTLPExporters = Union[
+    OTLPLogExporter, OTLPSpanExporter, OTLPMetricExporter
+]
+
+
+class OTLPExporterCustomizerBase(ABC):
+    def customize_exporter(exporter: BaseOTLPExporters):
+        pass

exporter/opentelemetry-exporter-otlp-customizer/src/opentelemetry/exporter/otlp/customizer/version/__init__.py

@@ -0,0 +1,15 @@
+# Copyright The OpenTelemetry Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+__version__ = "1.30.0"

opentelemetry-sdk/pyproject.toml

@@ -28,8 +28,8 @@ classifiers = [
   "Typing :: Typed",
 ]
 dependencies = [
-  "opentelemetry-api == 1.31.0.dev",
-  "opentelemetry-semantic-conventions == 0.52b0.dev",
+  "opentelemetry-api == 1.30.0",
+  "opentelemetry-semantic-conventions == 0.51b0",
   "typing-extensions >= 3.7.4",
 ]
 

opentelemetry-sdk/src/opentelemetry/sdk/_configuration/__init__.py

@@ -45,6 +45,11 @@
     OTEL_EXPORTER_OTLP_TRACES_PROTOCOL,
     OTEL_TRACES_SAMPLER,
     OTEL_TRACES_SAMPLER_ARG,
+    OTEL_EXPORTER_CUSTOMIZER,
+)
+from opentelemetry.exporter.otlp.customizer import (
+    BaseOTLPExporters,
+    OTLPExporterCustomizerBase,
 )
 from opentelemetry.sdk.metrics import MeterProvider
 from opentelemetry.sdk.metrics.export import (
@@ -90,6 +95,13 @@
 _logger = logging.getLogger(__name__)
 
 
+def _import_config_component(
+    selected_component: str, entry_point_name: str
+) -> object:
+    return _import_config_components([selected_component], entry_point_name)[
+        0
+    ][1]
+
 def _import_config_components(
     selected_components: List[str], entry_point_name: str
 ) -> Sequence[Tuple[str, object]]:
@@ -194,6 +206,7 @@ def _init_tracing(
     id_generator: IdGenerator = None,
     sampler: Sampler = None,
     resource: Resource = None,
+    exporter_customizer: OTLPExporterCustomizerBase=None,
 ):
     provider = TracerProvider(
         id_generator=id_generator,
@@ -203,9 +216,12 @@ def _init_tracing(
     set_tracer_provider(provider)
 
     for _, exporter_class in exporters.items():
-        exporter_args = {}
+        if exporter_customizer and isinstance(exporter_class, BaseOTLPExporters.__args__):
+            exporter_instance = exporter_customizer.customize_exporter(exporter_class)
+        else:
+            exporter_instance = exporter_class()
         provider.add_span_processor(
-            BatchSpanProcessor(exporter_class(**exporter_args))
+            BatchSpanProcessor(exporter_instance)
         )
 
 
@@ -214,6 +230,7 @@ def _init_metrics(
         str, Union[Type[MetricExporter], Type[MetricReader]]
     ],
     resource: Resource = None,
+    exporter_customizer: OTLPExporterCustomizerBase=None,
 ):
     metric_readers = []
 
@@ -223,9 +240,13 @@ def _init_metrics(
         if issubclass(exporter_or_reader_class, MetricReader):
             metric_readers.append(exporter_or_reader_class(**exporter_args))
         else:
+            if exporter_customizer and isinstance(exporter_or_reader_class, BaseOTLPExporters.__args__):
+                exporter_instance = exporter_customizer.customize_exporter(exporter_or_reader_class)
+            else:
+                exporter_instance = exporter_or_reader_class()
             metric_readers.append(
                 PeriodicExportingMetricReader(
-                    exporter_or_reader_class(**exporter_args)
+                    exporter_instance
                 )
             )
 
@@ -237,14 +258,18 @@ def _init_logging(
     exporters: Dict[str, Type[LogExporter]],
     resource: Resource = None,
     setup_logging_handler: bool = True,
+    exporter_customizer: OTLPExporterCustomizerBase=None,
 ):
     provider = LoggerProvider(resource=resource)
     set_logger_provider(provider)
 
     for _, exporter_class in exporters.items():
-        exporter_args = {}
+        if exporter_customizer and isinstance(exporter_class, BaseOTLPExporters.__args__):
+            exporter_instance = exporter_customizer.customize_exporter(exporter_class)
+        else:
+            exporter_instance = exporter_class()
         provider.add_log_record_processor(
-            BatchLogRecordProcessor(exporter_class(**exporter_args))
+            BatchLogRecordProcessor(exporter_instance)
         )
 
     event_logger_provider = EventLoggerProvider(logger_provider=provider)
@@ -380,6 +405,14 @@ def _initialize_components(
         metric_exporter_names + _get_exporter_names("metrics"),
         log_exporter_names + _get_exporter_names("logs"),
     )
+    exporter_customizer = None
+    customizer_name = os.getenv(OTEL_EXPORTER_CUSTOMIZER)
+    if customizer_name:
+        exporter_customizer = _import_config_component(
+            customizer_name, "opentelemetry_otlp_exporter_customizer"
+        )()
+        if not isinstance(exporter_customizer, OTLPExporterCustomizerBase):
+            raise RuntimeError(f"{customizer_name} is not an OTLPExporterCustomizerBase")
     if sampler is None:
         sampler_name = _get_sampler()
         sampler = _import_sampler(sampler_name)
@@ -402,8 +435,9 @@ def _initialize_components(
         id_generator=id_generator,
         sampler=sampler,
         resource=resource,
+        exporter_customizer=exporter_customizer,
     )
-    _init_metrics(metric_exporters, resource)
+    _init_metrics(metric_exporters, resource, exporter_customizer=exporter_customizer,)
     if setup_logging_handler is None:
         setup_logging_handler = (
             os.getenv(
@@ -413,7 +447,7 @@ def _initialize_components(
             .lower()
             == "true"
         )
-    _init_logging(log_exporters, resource, setup_logging_handler)
+    _init_logging(log_exporters, resource, setup_logging_handler, exporter_customizer=exporter_customizer)
 
 
 class _BaseConfigurator(ABC):

opentelemetry-sdk/src/opentelemetry/sdk/environment_variables/__init__.py

@@ -11,6 +11,13 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+OTEL_EXPORTER_CUSTOMIZER = "OTEL_EXPORTER_CUSTOMIZER"
+"""
+.. envvar:: OTEL_EXPORTER_CUSTOMIZER
+
+The :envvar:`OTEL_EXPORTER_CUSTOMIZER` environment sets a customizer for all exporters (traces, logs, and metrics).
+"""
+# TODO: Add environment variables for customizers specific to traces / logs / metrics.
 
 OTEL_SDK_DISABLED = "OTEL_SDK_DISABLED"
 """

opentelemetry-sdk/src/opentelemetry/sdk/version/__init__.py

@@ -12,4 +12,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-__version__ = "1.31.0.dev"
+__version__ = "1.30.0"