通过VPC连接器连接Google云平台的计算引擎和app engine

Question

Name            Network Region          IP address range Min. throughput Max. throughput
connector-name  default europe-west2    10.8.0.0/28      200             300    

Name        Zone            Internal IP         External IP 
some-name   europe-west2-c  10.154.0.2 (nic0)   34.89.113.193       

    db = PostgresqlExtDatabase(
        "some-name", # databse name
        user="postgres",
        password="some-password",
        host="10.154.0.2", # remote host internal ip
        port=5432,
    )
    db.connect()

vpc_access_connector:
  name: projects/some-name/locations/europe-west2/connectors/connector-name

2020-09-26 12:54:51 default[20200926t134815]    Is the server running on host "10.154.0.2" and accepting
2020-09-26 12:54:51 default[20200926t134815]    TCP/IP connections on port 5432?

更新1这是我的防火墙规则：

Direction
Ingress, Egress

Action on match
Allow

Source filters
IP ranges
92.40.176.9/32
78.146.103.141/32
10.154.0.2

Protocols and ports
tcp:5432

图片供参考：防火墙规则列表截图