exporter-otlp: adding metrics exporter structure

CHANGELOG.md

@@ -8,6 +8,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Decode URL-encoded headers in environment variables
   ([#2312](https://github.com/open-telemetry/opentelemetry-python/pull/2312))
+- [exporter/opentelemetry-exporter-otlp-proto-grpc] Add OTLPMetricExporter
+  ([#2323](https://github.com/open-telemetry/opentelemetry-python/pull/2323))
 
 ## [1.8.0-0.27b0](https://github.com/open-telemetry/opentelemetry-python/releases/tag/v1.8.0-0.27b0) - 2021-12-17
 

opentelemetry-sdk/src/opentelemetry/sdk/_metrics/export/metric_exporter.py → docs/getting_started/metrics_example.py

@@ -12,6 +12,5 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-
-class MetricExporter:
-    pass
+# metrics.py
+# TODO

exporter/opentelemetry-exporter-otlp-proto-grpc/src/opentelemetry/exporter/otlp/proto/grpc/_metric_exporter/__init__.py

@@ -0,0 +1,123 @@
+# 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.
+
+from typing import Optional, Sequence
+from grpc import ChannelCredentials, Compression
+from opentelemetry.exporter.otlp.proto.grpc.exporter import (
+    OTLPExporterMixin,
+    get_resource_data,
+)
+from opentelemetry.proto.collector.metrics.v1.metrics_service_pb2 import (
+    ExportMetricsServiceRequest,
+)
+from opentelemetry.proto.collector.metrics.v1.metrics_service_pb2_grpc import (
+    MetricsServiceStub,
+)
+from opentelemetry.proto.common.v1.common_pb2 import InstrumentationLibrary
+from opentelemetry.proto.metrics.v1.metrics_pb2 import (
+    InstrumentationLibraryMetrics,
+    ResourceMetrics,
+)
+from opentelemetry.proto.metrics.v1.metrics_pb2 import Metric as PB2Metric
+from opentelemetry.sdk._metrics.data import (
+    MetricData,
+)
+
+from opentelemetry.sdk._metrics.export import (
+    MetricExporter,
+    MetricExportResult,
+)
+
+
+class OTLPMetricExporter(
+    MetricExporter,
+    OTLPExporterMixin[MetricData, ExportMetricsServiceRequest, MetricExportResult]
+):
+    _result = MetricExportResult
+    _stub = MetricsServiceStub
+
+    def __init__(
+        self,
+        endpoint: Optional[str] = None,
+        insecure: Optional[bool] = None,
+        credentials: Optional[ChannelCredentials] = None,
+        headers: Optional[Sequence] = None,
+        timeout: Optional[int] = None,
+        compression: Optional[Compression] = None,
+    ):
+        super().__init__(
+            **{
+                "endpoint": endpoint,
+                "insecure": insecure,
+                "credentials": credentials,
+                "headers": headers,
+                "timeout": timeout,
+                "compression": compression,
+            }
+        )
+
+    def _translate_data(
+        self, data: Sequence[MetricData]
+    ) -> ExportMetricsServiceRequest:
+        sdk_resource_instrumentation_library_metrics = {}
+        self._collector_metric_kwargs = {}
+
+        for metric_data in data:
+            resource = metric_data.metric.resource
+            instrumentation_library_map = (
+                sdk_resource_instrumentation_library_metrics.get(resource, {})
+            )
+            if not instrumentation_library_map:
+                sdk_resource_instrumentation_library_metrics[
+                    resource
+                ] = instrumentation_library_map
+
+            instrumentation_library_metrics = instrumentation_library_map.get(
+                metric_data.instrumentation_info
+            )
+
+            if not instrumentation_library_metrics:
+                if metric_data.instrumentation_info is not None:
+                    instrumentation_library_map[
+                        metric_data.instrumentation_info
+                    ] = InstrumentationLibraryMetrics(
+                        instrumentation_library=InstrumentationLibrary(
+                            name=metric_data.instrumentation_info.name,
+                            version=metric_data.instrumentation_info.version,
+                        )
+                    )
+                else:
+                    instrumentation_library_map[
+                        metric_data.instrumentation_info
+                    ] = InstrumentationLibraryMetrics()
+
+            instrumentation_library_metrics = instrumentation_library_map.get(
+                metric_data.instrumentation_info
+            )
+
+            instrumentation_library_metrics.metrics.append(
+                PB2Metric(**self._collector_metric_kwargs)
+            )
+        return ExportMetricsServiceRequest(
+            resource_metrics=get_resource_data(
+                sdk_resource_instrumentation_library_metrics,
+                ResourceMetrics,
+                "metrics",
+            )
+        )
+
+    def export(self, metrics: Sequence[MetricData]) -> MetricExportResult:
+        return self._export(metrics)
+
+    def shutdown(self):
+        pass

exporter/opentelemetry-exporter-otlp-proto-grpc/tests/logs/test_otlp_logs_exporter.py

@@ -107,7 +107,7 @@ def setUp(self):
 
         self.server = server(ThreadPoolExecutor(max_workers=10))
 
-        self.server.add_insecure_port("[::]:4317")
+        self.server.add_insecure_port("127.0.0.1:4317")
 
         self.server.start()
 

exporter/opentelemetry-exporter-otlp-proto-grpc/tests/metrics/test_otlp_metrics_exporter.py

@@ -0,0 +1,219 @@
+# 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.
+
+from concurrent.futures import ThreadPoolExecutor
+from unittest import TestCase
+from unittest.mock import patch
+
+from google.protobuf.duration_pb2 import Duration
+from google.rpc.error_details_pb2 import RetryInfo
+from grpc import StatusCode, server
+
+from opentelemetry.exporter.otlp.proto.grpc._metric_exporter import (
+    OTLPMetricExporter,
+)
+from opentelemetry.proto.collector.metrics.v1.metrics_service_pb2 import (
+    ExportMetricsServiceResponse,
+)
+from opentelemetry.proto.collector.metrics.v1.metrics_service_pb2_grpc import (
+    MetricsServiceServicer,
+    add_MetricsServiceServicer_to_server,
+)
+from opentelemetry.sdk._metrics.data import Metric, MetricData
+from opentelemetry.sdk._metrics.export import MetricExportResult
+from opentelemetry.sdk.resources import Resource as SDKResource
+from opentelemetry.sdk.util.instrumentation import InstrumentationInfo
+
+
+class MetricsServiceServicerUNAVAILABLEDelay(MetricsServiceServicer):
+    # pylint: disable=invalid-name,unused-argument,no-self-use
+    def Export(self, request, context):
+        context.set_code(StatusCode.UNAVAILABLE)
+
+        context.send_initial_metadata(
+            (("google.rpc.retryinfo-bin", RetryInfo().SerializeToString()),)
+        )
+        context.set_trailing_metadata(
+            (
+                (
+                    "google.rpc.retryinfo-bin",
+                    RetryInfo(
+                        retry_delay=Duration(seconds=4)
+                    ).SerializeToString(),
+                ),
+            )
+        )
+
+        return ExportMetricsServiceResponse()
+
+
+class MetricsServiceServicerUNAVAILABLE(MetricsServiceServicer):
+    # pylint: disable=invalid-name,unused-argument,no-self-use
+    def Export(self, request, context):
+        context.set_code(StatusCode.UNAVAILABLE)
+
+        return ExportMetricsServiceResponse()
+
+
+class MetricsServiceServicerSUCCESS(MetricsServiceServicer):
+    # pylint: disable=invalid-name,unused-argument,no-self-use
+    def Export(self, request, context):
+        context.set_code(StatusCode.OK)
+
+        return ExportMetricsServiceResponse()
+
+
+class MetricsServiceServicerALREADY_EXISTS(MetricsServiceServicer):
+    # pylint: disable=invalid-name,unused-argument,no-self-use
+    def Export(self, request, context):
+        context.set_code(StatusCode.ALREADY_EXISTS)
+
+        return ExportMetricsServiceResponse()
+
+
+class TestOTLPMetricExporter(TestCase):
+    def setUp(self):
+
+        self.exporter = OTLPMetricExporter()
+
+        self.server = server(ThreadPoolExecutor(max_workers=10))
+
+        self.server.add_insecure_port("127.0.0.1:4317")
+
+        self.server.start()
+
+        self.metric_data_1 = MetricData(
+            metric=Metric(
+                resource=SDKResource({"key": "value"}),
+            ),
+            instrumentation_info=InstrumentationInfo(
+                "first_name", "first_version"
+            ),
+        )
+
+    def tearDown(self):
+        self.server.stop(None)
+
+    @patch(
+        "opentelemetry.exporter.otlp.proto.grpc.exporter.ssl_channel_credentials"
+    )
+    @patch("opentelemetry.exporter.otlp.proto.grpc.exporter.secure_channel")
+    @patch(
+        "opentelemetry.exporter.otlp.proto.grpc._metric_exporter.OTLPMetricExporter._stub"
+    )
+    # pylint: disable=unused-argument
+    def test_no_credentials_error(
+        self, mock_ssl_channel, mock_secure, mock_stub
+    ):
+        OTLPMetricExporter(insecure=False)
+        self.assertTrue(mock_ssl_channel.called)
+
+    # pylint: disable=no-self-use
+    @patch("opentelemetry.exporter.otlp.proto.grpc.exporter.insecure_channel")
+    @patch("opentelemetry.exporter.otlp.proto.grpc.exporter.secure_channel")
+    def test_otlp_exporter_endpoint(self, mock_secure, mock_insecure):
+        expected_endpoint = "localhost:4317"
+        endpoints = [
+            (
+                "http://localhost:4317",
+                None,
+                mock_insecure,
+            ),
+            (
+                "localhost:4317",
+                None,
+                mock_insecure,
+            ),
+            (
+                "localhost:4317",
+                False,
+                mock_secure,
+            ),
+            (
+                "https://localhost:4317",
+                None,
+                mock_secure,
+            ),
+            (
+                "https://localhost:4317",
+                True,
+                mock_insecure,
+            ),
+        ]
+        # pylint: disable=C0209
+        for endpoint, insecure, mock_method in endpoints:
+            OTLPMetricExporter(endpoint=endpoint, insecure=insecure)
+            self.assertEqual(
+                1,
+                mock_method.call_count,
+                "expected {} to be called for {} {}".format(
+                    mock_method, endpoint, insecure
+                ),
+            )
+            self.assertEqual(
+                expected_endpoint,
+                mock_method.call_args[0][0],
+                "expected {} got {} {}".format(
+                    expected_endpoint, mock_method.call_args[0][0], endpoint
+                ),
+            )
+            mock_method.reset_mock()
+
+    @patch("opentelemetry.exporter.otlp.proto.grpc.exporter.expo")
+    @patch("opentelemetry.exporter.otlp.proto.grpc.exporter.sleep")
+    def test_unavailable(self, mock_sleep, mock_expo):
+
+        mock_expo.configure_mock(**{"return_value": [1]})
+
+        add_MetricsServiceServicer_to_server(
+            MetricsServiceServicerUNAVAILABLE(), self.server
+        )
+        self.assertEqual(
+            self.exporter.export([self.metric_data_1]),
+            MetricExportResult.FAILURE,
+        )
+        mock_sleep.assert_called_with(1)
+
+    @patch("opentelemetry.exporter.otlp.proto.grpc.exporter.expo")
+    @patch("opentelemetry.exporter.otlp.proto.grpc.exporter.sleep")
+    def test_unavailable_delay(self, mock_sleep, mock_expo):
+
+        mock_expo.configure_mock(**{"return_value": [1]})
+
+        add_MetricsServiceServicer_to_server(
+            MetricsServiceServicerUNAVAILABLEDelay(), self.server
+        )
+        self.assertEqual(
+            self.exporter.export([self.metric_data_1]),
+            MetricExportResult.FAILURE,
+        )
+        mock_sleep.assert_called_with(4)
+
+    def test_success(self):
+        add_MetricsServiceServicer_to_server(
+            MetricsServiceServicerSUCCESS(), self.server
+        )
+        self.assertEqual(
+            self.exporter.export([self.metric_data_1]),
+            MetricExportResult.SUCCESS,
+        )
+
+    def test_failure(self):
+        add_MetricsServiceServicer_to_server(
+            MetricsServiceServicerALREADY_EXISTS(), self.server
+        )
+        self.assertEqual(
+            self.exporter.export([self.metric_data_1]),
+            MetricExportResult.FAILURE,
+        )

exporter/opentelemetry-exporter-otlp-proto-grpc/tests/test_otlp_trace_exporter.py

@@ -131,7 +131,7 @@ def setUp(self):
 
         self.server = server(ThreadPoolExecutor(max_workers=10))
 
-        self.server.add_insecure_port("[::]:4317")
+        self.server.add_insecure_port("127.0.0.1:4317")
 
         self.server.start()