forked from GoogleCloudPlatform/microservices-demo
-
Notifications
You must be signed in to change notification settings - Fork 0
/
recommendation_server.py
executable file
·153 lines (134 loc) · 5.51 KB
/
recommendation_server.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
#!/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 opentelemetry import trace
from opentelemetry.instrumentation.grpc import GrpcInstrumentorClient, GrpcInstrumentorServer
from opentelemetry.sdk.trace import TracerProvider
from opentelemetry.sdk.trace.export import BatchSpanProcessor
from opentelemetry.exporter.otlp.proto.grpc.trace_exporter import OTLPSpanExporter
from logger import getJSONLogger
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 range(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)
def Watch(self, request, context):
return health_pb2.HealthCheckResponse(
status=health_pb2.HealthCheckResponse.UNIMPLEMENTED)
if __name__ == "__main__":
logger.info("initializing recommendationservice")
try:
if "DISABLE_PROFILER" in os.environ:
raise KeyError()
else:
logger.info("Profiler enabled.")
initStackdriverProfiling()
except KeyError:
logger.info("Profiler disabled.")
try:
grpc_client_instrumentor = GrpcInstrumentorClient()
grpc_client_instrumentor.instrument()
grpc_server_instrumentor = GrpcInstrumentorServer()
grpc_server_instrumentor.instrument()
if os.environ["ENABLE_TRACING"] == "1":
trace.set_tracer_provider(TracerProvider())
otel_endpoint = os.getenv("COLLECTOR_SERVICE_ADDR", "localhost:4317")
trace.get_tracer_provider().add_span_processor(
BatchSpanProcessor(
OTLPSpanExporter(
endpoint = otel_endpoint,
insecure = True
)
)
)
except (KeyError, DefaultCredentialsError):
logger.info("Tracing disabled.")
except Exception as e:
logger.warn(f"Exception on Cloud Trace setup: {traceback.format_exc()}, tracing disabled.")
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)
product_catalog_stub = demo_pb2_grpc.ProductCatalogServiceStub(channel)
# create gRPC server
server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))
# 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)