Configure auto instrumentation to support metrics (#2705)

* Configure auto instrumentation to support metrics

* Add tests

* Update test_configurator.py

* Add CHANGELOG entry

* lint

CHANGELOG.md

@@ -23,6 +23,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   ([#2728](https://github.com/open-telemetry/opentelemetry-python/pull/2728))
 - fix: update entry point object references for metrics
   ([#2731](https://github.com/open-telemetry/opentelemetry-python/pull/2731))
+- Configure auto instrumentation to support metrics
+  ([#2705](https://github.com/open-telemetry/opentelemetry-python/pull/2705))
 
 ## [1.12.0rc1-0.31b0](https://github.com/open-telemetry/opentelemetry-python/releases/tag/v1.12.0rc1-0.31b0) - 2022-05-17
 

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

@@ -25,12 +25,13 @@
 
 from pkg_resources import iter_entry_points
 
-from opentelemetry import trace
 from opentelemetry.environment_variables import (
     OTEL_LOGS_EXPORTER,
+    OTEL_METRICS_EXPORTER,
     OTEL_PYTHON_ID_GENERATOR,
     OTEL_TRACES_EXPORTER,
 )
+from opentelemetry.metrics import set_meter_provider
 from opentelemetry.sdk._logs import (
     LogEmitterProvider,
     LoggingHandler,
@@ -40,11 +41,17 @@
 from opentelemetry.sdk.environment_variables import (
     _OTEL_PYTHON_LOGGING_AUTO_INSTRUMENTATION_ENABLED,
 )
+from opentelemetry.sdk.metrics import MeterProvider
+from opentelemetry.sdk.metrics.export import (
+    MetricExporter,
+    PeriodicExportingMetricReader,
+)
 from opentelemetry.sdk.resources import Resource
 from opentelemetry.sdk.trace import TracerProvider
 from opentelemetry.sdk.trace.export import BatchSpanProcessor, SpanExporter
 from opentelemetry.sdk.trace.id_generator import IdGenerator
 from opentelemetry.semconv.resource import ResourceAttributes
+from opentelemetry.trace import set_tracer_provider
 
 _EXPORTER_OTLP = "otlp"
 _EXPORTER_OTLP_PROTO_GRPC = "otlp_proto_grpc"
@@ -87,7 +94,7 @@ def _init_tracing(
         id_generator=id_generator(),
         resource=Resource.create(auto_resource),
     )
-    trace.set_tracer_provider(provider)
+    set_tracer_provider(provider)
 
     for _, exporter_class in exporters.items():
         exporter_args = {}
@@ -96,6 +103,33 @@ def _init_tracing(
         )
 
 
+def _init_metrics(
+    exporters: Dict[str, Type[MetricExporter]],
+    auto_instrumentation_version: Optional[str] = None,
+):
+    # if env var OTEL_RESOURCE_ATTRIBUTES is given, it will read the service_name
+    # from the env variable else defaults to "unknown_service"
+    auto_resource = {}
+    # populate version if using auto-instrumentation
+    if auto_instrumentation_version:
+        auto_resource[
+            ResourceAttributes.TELEMETRY_AUTO_VERSION
+        ] = auto_instrumentation_version
+
+    metric_readers = []
+
+    for _, exporter_class in exporters.items():
+        exporter_args = {}
+        metric_readers.append(
+            PeriodicExportingMetricReader(exporter_class(**exporter_args))
+        )
+
+    provider = MeterProvider(
+        resource=Resource.create(auto_resource), metric_readers=metric_readers
+    )
+    set_meter_provider(provider)
+
+
 def _init_logging(
     exporters: Dict[str, Type[LogExporter]],
     auto_instrumentation_version: Optional[str] = None,
@@ -145,9 +179,15 @@ def _import_config_components(
 
 def _import_exporters(
     trace_exporter_names: Sequence[str],
+    metric_exporter_names: Sequence[str],
     log_exporter_names: Sequence[str],
-) -> Tuple[Dict[str, Type[SpanExporter]], Dict[str, Type[LogExporter]]]:
+) -> Tuple[
+    Dict[str, Type[SpanExporter]],
+    Dict[str, Type[MetricExporter]],
+    Dict[str, Type[LogExporter]],
+]:
     trace_exporters = {}
+    metric_exporters = {}
     log_exporters = {}
 
     for (exporter_name, exporter_impl,) in _import_config_components(
@@ -158,6 +198,14 @@ def _import_exporters(
         else:
             raise RuntimeError(f"{exporter_name} is not a trace exporter")
 
+    for (exporter_name, exporter_impl,) in _import_config_components(
+        metric_exporter_names, "opentelemetry_metrics_exporter"
+    ):
+        if issubclass(exporter_impl, MetricExporter):
+            metric_exporters[exporter_name] = exporter_impl
+        else:
+            raise RuntimeError(f"{exporter_name} is not a metric exporter")
+
     for (exporter_name, exporter_impl,) in _import_config_components(
         log_exporter_names, "opentelemetry_logs_exporter"
     ):
@@ -166,7 +214,7 @@ def _import_exporters(
         else:
             raise RuntimeError(f"{exporter_name} is not a log exporter")
 
-    return trace_exporters, log_exporters
+    return trace_exporters, metric_exporters, log_exporters
 
 
 def _import_id_generator(id_generator_name: str) -> IdGenerator:
@@ -182,13 +230,15 @@ def _import_id_generator(id_generator_name: str) -> IdGenerator:
 
 
 def _initialize_components(auto_instrumentation_version):
-    trace_exporters, log_exporters = _import_exporters(
+    trace_exporters, metric_exporters, log_exporters = _import_exporters(
         _get_exporter_names(environ.get(OTEL_TRACES_EXPORTER)),
+        _get_exporter_names(environ.get(OTEL_METRICS_EXPORTER)),
         _get_exporter_names(environ.get(OTEL_LOGS_EXPORTER)),
     )
     id_generator_name = _get_id_generator()
     id_generator = _import_id_generator(id_generator_name)
     _init_tracing(trace_exporters, id_generator, auto_instrumentation_version)
+    _init_metrics(metric_exporters, auto_instrumentation_version)
     logging_enabled = os.getenv(
         _OTEL_PYTHON_LOGGING_AUTO_INSTRUMENTATION_ENABLED, "false"
     )

opentelemetry-sdk/tests/test_configurator.py

@@ -12,9 +12,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 # type: ignore
+# pylint: skip-file
 
 import logging
 from os import environ
+from typing import Dict, Iterable, Optional
 from unittest import TestCase
 from unittest.mock import patch
 
@@ -28,12 +30,21 @@
     _import_exporters,
     _import_id_generator,
     _init_logging,
+    _init_metrics,
     _init_tracing,
     _initialize_components,
 )
 from opentelemetry.sdk._logs import LoggingHandler
 from opentelemetry.sdk._logs.export import ConsoleLogExporter
-from opentelemetry.sdk.metrics.export import ConsoleMetricExporter
+from opentelemetry.sdk.metrics import MeterProvider
+from opentelemetry.sdk.metrics.export import (
+    AggregationTemporality,
+    ConsoleMetricExporter,
+    Metric,
+    MetricExporter,
+    MetricReader,
+)
+from opentelemetry.sdk.metrics.view import Aggregation
 from opentelemetry.sdk.resources import SERVICE_NAME, Resource
 from opentelemetry.sdk.trace.export import ConsoleSpanExporter
 from opentelemetry.sdk.trace.id_generator import IdGenerator, RandomIdGenerator
@@ -61,6 +72,10 @@ def get_log_emitter(self, name):
         return DummyLogEmitter(name, self.resource, self.processor)
 
 
+class DummyMeterProvider(MeterProvider):
+    pass
+
+
 class DummyLogEmitter:
     def __init__(self, name, resource, processor):
         self.name = name
@@ -93,6 +108,44 @@ def __init__(self, exporter):
         self.exporter = exporter
 
 
+class DummyMetricReader(MetricReader):
+    def __init__(
+        self,
+        exporter: MetricExporter,
+        preferred_temporality: Dict[type, AggregationTemporality] = None,
+        preferred_aggregation: Dict[type, Aggregation] = None,
+        export_interval_millis: Optional[float] = None,
+        export_timeout_millis: Optional[float] = None,
+    ) -> None:
+        super().__init__(
+            preferred_temporality=preferred_temporality,
+            preferred_aggregation=preferred_aggregation,
+        )
+        self.exporter = exporter
+
+    def _receive_metrics(
+        self,
+        metrics: Iterable[Metric],
+        timeout_millis: float = 10_000,
+        **kwargs,
+    ) -> None:
+        self.exporter.export(None)
+
+    def shutdown(self, timeout_millis: float = 30_000, **kwargs) -> None:
+        return True
+
+
+class DummyOTLPMetricExporter:
+    def __init__(self, *args, **kwargs):
+        self.export_called = False
+
+    def export(self, batch):
+        self.export_called = True
+
+    def shutdown(self):
+        pass
+
+
 class Exporter:
     def __init__(self):
         tracer_provider = trace.get_tracer_provider()
@@ -148,7 +201,7 @@ def setUp(self):
             "opentelemetry.sdk._configuration.BatchSpanProcessor", Processor
         )
         self.set_provider_patcher = patch(
-            "opentelemetry.trace.set_tracer_provider"
+            "opentelemetry.sdk._configuration.set_tracer_provider"
         )
 
         self.get_provider_mock = self.get_provider_patcher.start()
@@ -304,6 +357,61 @@ def test_logging_init_enable_env(self, logging_mock, tracing_mock):
         self.assertEqual(tracing_mock.call_count, 1)
 
 
+class TestMetricsInit(TestCase):
+    def setUp(self):
+        self.metric_reader_patch = patch(
+            "opentelemetry.sdk._configuration.PeriodicExportingMetricReader",
+            DummyMetricReader,
+        )
+        self.provider_patch = patch(
+            "opentelemetry.sdk._configuration.MeterProvider",
+            DummyMeterProvider,
+        )
+        self.set_provider_patch = patch(
+            "opentelemetry.sdk._configuration.set_meter_provider"
+        )
+
+        self.metric_reader_mock = self.metric_reader_patch.start()
+        self.provider_mock = self.provider_patch.start()
+        self.set_provider_mock = self.set_provider_patch.start()
+
+    def tearDown(self):
+        self.metric_reader_patch.stop()
+        self.set_provider_patch.stop()
+        self.provider_patch.stop()
+
+    def test_metrics_init_empty(self):
+        _init_metrics({}, "auto-version")
+        self.assertEqual(self.set_provider_mock.call_count, 1)
+        provider = self.set_provider_mock.call_args[0][0]
+        self.assertIsInstance(provider, DummyMeterProvider)
+        self.assertIsInstance(provider._sdk_config.resource, Resource)
+        self.assertEqual(
+            provider._sdk_config.resource.attributes.get(
+                "telemetry.auto.version"
+            ),
+            "auto-version",
+        )
+
+    @patch.dict(
+        environ,
+        {"OTEL_RESOURCE_ATTRIBUTES": "service.name=otlp-service"},
+    )
+    def test_metrics_init_exporter(self):
+        _init_metrics({"otlp": DummyOTLPMetricExporter})
+        self.assertEqual(self.set_provider_mock.call_count, 1)
+        provider = self.set_provider_mock.call_args[0][0]
+        self.assertIsInstance(provider, DummyMeterProvider)
+        self.assertIsInstance(provider._sdk_config.resource, Resource)
+        self.assertEqual(
+            provider._sdk_config.resource.attributes.get("service.name"),
+            "otlp-service",
+        )
+        reader = provider._sdk_config.metric_readers[0]
+        self.assertIsInstance(reader, DummyMetricReader)
+        self.assertIsInstance(reader.exporter, DummyOTLPMetricExporter)
+
+
 class TestExporterNames(TestCase):
     def test_otlp_exporter_overwrite(self):
         for exporter in [_EXPORTER_OTLP, _EXPORTER_OTLP_PROTO_GRPC]:
@@ -328,8 +436,8 @@ def test_empty_exporters(self):
 
 class TestImportExporters(TestCase):
     def test_console_exporters(self):
-        trace_exporters, logs_exporters = _import_exporters(
-            ["console"], ["console"]
+        trace_exporters, metric_exporterts, logs_exporters = _import_exporters(
+            ["console"], ["console"], ["console"]
         )
         self.assertEqual(
             trace_exporters["console"].__class__, ConsoleSpanExporter.__class__
@@ -338,6 +446,6 @@ def test_console_exporters(self):
             logs_exporters["console"].__class__, ConsoleLogExporter.__class__
         )
         self.assertEqual(
-            logs_exporters["console"].__class__,
+            metric_exporterts["console"].__class__,
             ConsoleMetricExporter.__class__,
         )