与 127.0.0.1:5432 的连接被拒绝。 检查主机名和端口是否正确以及 postmaster 是否接受 TCP/IP 连接

Question

I'm running my code from docker-compose which is trying to access a local database(postgres). whenever i try to run i get this error

Connection to 127.0.0.1:5432 refused. Check that the hostname and port are correct and that the postmaster is accepting TCP/IP connections.

but postgres is running on port 5432

here is ther result of sudo netstat -ltnp | grep postgressudo netstat -ltnp | grep postgres

tcp        0      0 127.0.0.1:5432          0.0.0.0:*               LISTEN      1995/postgres

I'am using postgres v 10.9 on ubunto OS.

Answer 1

If you try to access to localhost inside a container then it's the localhost of the container not your machine or any other container. If both your app and database are declare in the same compose, use the same network you can use the container name

That is correct, but if you have Postgres installed in you local machine, you could bypass the container restriction setting your machine's IP, eg connecting to Postgres to:5432

If still not working, check if you have any firewall restriction on your local machine, on port 5432 and check if Postgres is set to recive data from external source.

Plus this example should be only used "at home", I do not suggest to use it in company network or any production environment.