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由 zhou liang 创作于89db5047
recommendation_server.py 6.94 KiB
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#!/usr/bin/python
#
# Copyright 2018 Google LLC
#
# 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.
import os
import random
import time
import traceback
from concurrent import futures
import googlecloudprofiler
from google.auth.exceptions import DefaultCredentialsError
import grpc
import demo_pb2
import demo_pb2_grpc
from grpc_health.v1 import health_pb2
from grpc_health.v1 import health_pb2_grpc
from logger import getJSONLogger
from opentelemetry import trace
from opentelemetry.instrumentation.grpc import server_interceptor
from opentelemetry.instrumentation.grpc.grpcext import intercept_server
from opentelemetry.instrumentation.grpc import client_interceptor
from opentelemetry.instrumentation.grpc.grpcext import intercept_channel
from opentelemetry.sdk.trace import TracerProvider
from opentelemetry.exporter import jaeger
from opentelemetry.sdk.trace.export import BatchExportSpanProcessor
from opentelemetry.sdk.trace.export import Span, SpanExporter, SpanExportResult
from opentelemetry.exporter.jaeger import _translate_to_jaeger
from opentelemetry.exporter.jaeger.gen.jaeger import Collector as jaegerType
trace.set_tracer_provider(TracerProvider())
# create a JaegerSpanExporter
jaeger_exporter = jaeger.JaegerSpanExporter(
service_name=os.environ.get('SERVICE_NAME', "recommendationservice"),
# configure agent
# agent_host_name="localhost",
# agent_port=6831,
# optional: configure also collector
collector_host_name=os.environ.get('JAEGER_HOST', 'jaeger-collector'),
collector_port=14268,
collector_endpoint="/api/traces?format=jaeger.thrift",
# username=xxxx, # optional
# password=xxxx, # optional
)
def new_export(spans):
global jaeger_exporter
self = jaeger_exporter
jaeger_spans = _translate_to_jaeger(spans)
podIp = os.environ.get('POD_IP')
podName = os.environ.get('POD_NAME')
nodeName = os.environ.get('NODE_NAME')
tags = [
jaegerType.Tag(
key="exporter", vType=jaegerType.TagType.STRING, vStr="jaeger"),
jaegerType.Tag(
key="float", vType=jaegerType.TagType.DOUBLE, vDouble=312.23),
jaegerType.Tag(
key="ip", vType=jaegerType.TagType.STRING, vStr=podIp),
jaegerType.Tag(
key="name", vType=jaegerType.TagType.STRING, vStr=podName),
jaegerType.Tag(key="node_name",
vType=jaegerType.TagType.STRING, vStr=nodeName)
]
batch = jaegerType.Batch(
spans=jaeger_spans,
process=jaegerType.Process(
serviceName=self.service_name, tags=tags),
)
if self.collector is not None:
self.collector.submit(batch)
self.agent_client.emit(batch)
return SpanExportResult.SUCCESS
jaeger_exporter.export = new_export
# create a BatchExportSpanProcessor and add the exporter to it
span_processor = BatchExportSpanProcessor(jaeger_exporter)
# add to the tracer factory
trace.get_tracer_provider().add_span_processor(span_processor)
logger = getJSONLogger('recommendationservice-server')
def initStackdriverProfiling():
project_id = None
try:
project_id = os.environ["GCP_PROJECT_ID"]
except KeyError:
# Environment variable not set
pass
for retry in xrange(1, 4):
try:
if project_id:
googlecloudprofiler.start(service='recommendation_server', service_version='1.0.0', verbose=0,
project_id=project_id)
else:
googlecloudprofiler.start(service='recommendation_server', service_version='1.0.0', verbose=0)
logger.info("Successfully started Stackdriver Profiler.")
return
except (BaseException) as exc:
logger.info("Unable to start Stackdriver Profiler Python agent. " + str(exc))
if (retry < 4):
logger.info("Sleeping %d seconds to retry Stackdriver Profiler agent initialization" % (retry * 10))
time.sleep(1)
else:
logger.warning("Could not initialize Stackdriver Profiler after retrying, giving up")
return
class RecommendationService(demo_pb2_grpc.RecommendationServiceServicer):
def ListRecommendations(self, request, context):
max_responses = 5
# fetch list of products from product catalog stub
cat_response = product_catalog_stub.ListProducts(demo_pb2.Empty())
product_ids = [x.id for x in cat_response.products]
filtered_products = list(set(product_ids) - set(request.product_ids))
num_products = len(filtered_products)
num_return = min(max_responses, num_products)
# sample list of indicies to return
indices = random.sample(range(num_products), num_return)
# fetch product ids from indices
prod_list = [filtered_products[i] for i in indices]
logger.info("[Recv ListRecommendations] product_ids={}".format(prod_list))
# build and return response
response = demo_pb2.ListRecommendationsResponse()
response.product_ids.extend(prod_list)
return response
def Check(self, request, context):
return health_pb2.HealthCheckResponse(
status=health_pb2.HealthCheckResponse.SERVING)
if __name__ == "__main__":
logger.info("initializing recommendationservice")
port = os.environ.get('PORT', "8080")
catalog_addr = os.environ.get('PRODUCT_CATALOG_SERVICE_ADDR', '')
if catalog_addr == "":
raise Exception('PRODUCT_CATALOG_SERVICE_ADDR environment variable not set')
logger.info("product catalog address: " + catalog_addr)
channel = grpc.insecure_channel(catalog_addr)
channel = intercept_channel(channel, client_interceptor())
product_catalog_stub = demo_pb2_grpc.ProductCatalogServiceStub(channel)
# create gRPC server
#server = grpc.server(futures.ThreadPoolExecutor(max_workers=10),
# interceptors=(tracer_interceptor,))
server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
# OpenTelemetry magic!
server = intercept_server(server, server_interceptor())
# add class to gRPC server
service = RecommendationService()
demo_pb2_grpc.add_RecommendationServiceServicer_to_server(service, server)
health_pb2_grpc.add_HealthServicer_to_server(service, server)
# start server
logger.info("listening on port: " + port)
server.add_insecure_port('[::]:' + port)
server.start()
# keep alive
try:
while True:
time.sleep(10000)
except KeyboardInterrupt:
server.stop(0)