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The C based gRPC (C++, Python, Ruby, Objective-C, PHP, C#)
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81 lines
2.6 KiB
81 lines
2.6 KiB
12 months ago
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# Copyright 2024 gRPC authors.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""The Python implementation of the GRPC helloworld.Greeter server with observability enabled."""
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from collections import defaultdict
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from concurrent import futures
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import logging
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import time
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from typing import Optional
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import grpc
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import grpc_observability
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import helloworld_pb2
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import helloworld_pb2_grpc
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import open_telemetry_exporter
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from opentelemetry.sdk.metrics import MeterProvider
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from opentelemetry.sdk.metrics.export import PeriodicExportingMetricReader
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_OTEL_EXPORT_INTERVAL_S = 0.5
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_SERVER_PORT = "50051"
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class BaseOpenTelemetryPlugin(grpc_observability.OpenTelemetryPlugin):
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def __init__(self, provider: MeterProvider):
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self.provider = provider
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def get_meter_provider(self) -> Optional[MeterProvider]:
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return self.provider
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class Greeter(helloworld_pb2_grpc.GreeterServicer):
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def SayHello(self, request, context):
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message = request.name
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return helloworld_pb2.HelloReply(message=f"Hello {message}")
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def serve():
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all_metrics = defaultdict(list)
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otel_exporter = open_telemetry_exporter.OTelMetricExporter(
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all_metrics, print_live=False
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)
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reader = PeriodicExportingMetricReader(
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exporter=otel_exporter,
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export_interval_millis=_OTEL_EXPORT_INTERVAL_S * 1000,
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)
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provider = MeterProvider(metric_readers=[reader])
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otel_plugin = BaseOpenTelemetryPlugin(provider)
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with grpc_observability.OpenTelemetryObservability(plugins=[otel_plugin]):
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server = grpc.server(
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thread_pool=futures.ThreadPoolExecutor(max_workers=10),
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)
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helloworld_pb2_grpc.add_GreeterServicer_to_server(Greeter(), server)
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server.add_insecure_port("[::]:" + _SERVER_PORT)
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server.start()
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print("Server started, listening on " + _SERVER_PORT)
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# Sleep to make sure client made RPC call and all metrics are exported.
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time.sleep(10)
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print("Metrics exported on Server side:")
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for metric in all_metrics:
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print(metric)
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server.stop(0)
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if __name__ == "__main__":
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logging.basicConfig()
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serve()
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