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grpc: add health checks to python services (#28)

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also converted line endings for recommendationservice/requirements.txt from
dos to unix.
This commit is contained in:
Ahmet Alp Balkan 2018-09-19 12:34:56 -07:00 • committed by GitHub
parent fc6df2daea
commit 880ee16be2
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10 changed files with 331 additions and 259 deletions
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35
src/emailservice/email_server.py
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@ -19,13 +19,14 @@ import argparse
import os
import sys
import time
import grpc
from jinja2 import Environment, FileSystemLoader, select_autoescape, TemplateError
from google.api_core.exceptions import GoogleAPICallError
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 opencensus.trace.ext.grpc import server_interceptor
# from opencensus.trace.samplers import always_on
@ -56,7 +57,12 @@ env = Environment(
)
template = env.get_template('confirmation.html')
class EmailService(demo_pb2_grpc.EmailServiceServicer):
class BaseEmailService(demo_pb2_grpc.EmailServiceServicer):
def Check(self, request, context):
return health_pb2.HealthCheckResponse(
status=health_pb2.HealthCheckResponse.SERVING)
class EmailService(BaseEmailService):
def __init__(self):
raise Exception('cloud mail client not implemented')
super().__init__()
@ -79,7 +85,6 @@ class EmailService(demo_pb2_grpc.EmailServiceServicer):
"html_body": content
}
)
print("Message sent: {}".format(response.rfc822_message_id))
def SendOrderConfirmation(self, request, context):
@ -104,18 +109,30 @@ class EmailService(demo_pb2_grpc.EmailServiceServicer):
return demo_pb2.Empty()
class DummyEmailService(demo_pb2_grpc.EmailServiceServicer):
class DummyEmailService(BaseEmailService):
def SendOrderConfirmation(self, request, context):
print('A request to send order confirmation email to {} has been received.'.format(request.email))
return demo_pb2.Empty()
class HealthCheck():
def Check(self, request, context):
return health_pb2.HealthCheckResponse(
status=health_pb2.HealthCheckResponse.SERVING)
def start(dummy_mode):
server = grpc.server(futures.ThreadPoolExecutor(max_workers=10))#, interceptors=(tracer_interceptor,))
service = None
if dummy_mode:
demo_pb2_grpc.add_EmailServiceServicer_to_server(DummyEmailService(), server)
service = DummyEmailService()
else:
raise Exception('non-dummy mode not implemented')
server.add_insecure_port('[::]:8080')
raise Exception('non-dummy mode not implemented yet')
demo_pb2_grpc.add_EmailServiceServicer_to_server(service, server)
health_pb2_grpc.add_HealthServicer_to_server(service, server)
port = os.environ.get('PORT', "8080")
print("listening on port: "+port)
server.add_insecure_port('[::]:'+port)
server.start()
try:
while True:
@ -125,5 +142,5 @@ def start(dummy_mode):
if __name__ == '__main__':
print('Starting the email service in dummy mode.')
print('starting the email service in dummy mode.')
start(dummy_mode = True)