使用VPC连接器的不与MongoDB连接

Question

当我使用VPC连接器在Google上部署Python应用程序时，以及在带有副本集的MongoDB上部署Python应用程序时，会遇到以下错误。

MongoDB正在使用Google。

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代码：

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.")

Answer 1

确保复制集中成员的主机名可从应用程序访问。

步骤：

rs.config()检查

cfg.members[0].host = FQDN

1. 检查成员主机名

确保从application.中可以访问FQDN