connect through socks5 proxy

I would like to use asyncpg through a socks 5 proxy. I need this because the postgresql instances are running inside a docker overlay network (swarm). The IP addresses of the servers are not fixed, and it is not possible to access them directly.

If I had a single postgres server, then it would not be a problem to manually create a tunnel. But I need to connect to several different servers, and their ip addresses are changing. Manually creating a bunch of host aliases and creating multiple tunnels is just not practical.

Would it be possible to add a layer that would allow me to add my own callback for creating the TCP socket for a given host name + port pair?

该 issue 没有指定文件或测试。首先跟踪 asyncpg 连接设置以及针对主机和端口对的 TCP 套接字创建路径，然后确定用户提供的 callback 如何支持连接到不断变化的 PostgreSQL 服务器地址的 SOCKS5 连接。完成的标准是：所请求的连接层已经设计完成，并且其行为已得到验证。