如何使Postgresql数据库可从Postgres Docker容器外部连接？

Question

I am using postgres:9.3 docker container from the official docker hub

https://hub.docker.com/_/postgres/

started the database container with command

docker run -d -e POSTGRES_PASSWORD=mysecretpassword -p 25432:5432 --name osm-database osm-database

and connect to it using docker link from another container(osm-updater)

docker run -d --link osm-database --name osm-updater osm-updater

Now I found I can not psql to the database from osm-updater container, get error

psql: could not connect to server: Connection refused
Is the server running on host "172.17.0.12" and accepting
TCP/IP connections on port 5432?

so I explored the network sockets within the osm-database container with

netstat -tulpn

the result

tcp        0      0 127.0.0.1:5432          0.0.0.0:*               LISTEN

which shows within the osm-database container, the postgres db can only be connected to 127.0.0.1 which is wrong ? should be 0.0.0.0:5432 ?

so that I could not connect to osm-database from osm-update with command like

psql -U postgres -p 5432 -h 172.17.0.12

172.17.0.12 is the ip_address obtained with (docker inspect command)

How could I fix this ? How could I change the "local address" column of the network socket

Answer 1

You actually want to use the eth0 of the machine. If you are in Linux you can grab it via ifconfig and connect to the database on port 25432 as that is the port you are exposing.