MongoDB
VPC コネクタとレプリカ セットを使用して Python アプリケーションを Google App Engine にデプロイすると、次のエラーが発生します。
MongoDB
は Google Compute Engine 上にあります。
pymongo.errors.ServerSelectionTimeoutError: \
Could not reach any servers in [('mongodb-v44', 27017)]. \
Replica set is configured with internal hostnames or IPs?, \
Timeout: 30s, Topology Description: <TopologyDescription id: \
5ff5a4121251453cdcc1ff41, topology_type: ReplicaSetNoPrimary, \
servers: [<ServerDescription ('mongodb-v44', 27017) \
server_type: Unknown, \
rtt: None, error=AutoReconnect('mongodb-v44:27017: \
a [Errno -2] Name or service not known')>]>"
Python コード:
mongo_connection = mongoengine.connect(
db=os.getenv('DB_NAME'),
host=os.getenv('DB_HOST_URL'),
port=int(os.getenv('DB_PORT')),
username=os.getenv('DB_USERNAME'),
password=os.getenv('DB_PASSWORD'),
authentication_source='admin',
replicaset=os.getenv('REPLICA_SET'),
read_preference=ReadPreference.PRIMARY_PREFERRED
)
try:
info = mongo_connection.server_info() # Forces a call.
except Exception:
raise Exception("mongo server is down.")