Is it possible to specify multi hosts dsn for connection pool?

Is it possible to connect to several hosts (one master and replicas) from ConnectionPool (interface like libpq provides)?

I mean the following: https://www.postgresql.org/docs/current/static/libpq-connect.html

# Read sessions
postgresql://host1:123,host2:456/somedb?target_session_attrs=any

# Read-write sessions
postgresql://host1:123,host2:456/somedb?target_session_attrs=read-write

I enumerate all postgresql hosts and in target_session_attrs parameter specify read-write if i need master.

Or i should create separate connection pools for master & replicas servers?

How that functionality (switching between hosts depending on target_session_attrs attrs, re-connecting on master switch) can be implemented in asyncpg?

首先查看 asyncpg 的 ConnectionPool 接口，以及链接的 PostgreSQL libpq 文档中关于多主机 DSN 和 target_session_attrs 的内容。该 issue 未指定源文件或测试；完成标准是明确支持多主机选择和重新连接，或者记录一种使用独立 pool 的替代方案。