从Docker容器连接到Postgres

Question

I'm a little lost as to why my java application can't connect to my postgres database. I'm aiming to connect to a postgres database through jdbc. The application is to run inside a docker container.

this.connection = `DriverManager.getConnection("jdbc:postgresql://<myip>:5432/databasename", "usr", "password");`

I'm getting the exception:

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

When I run the application from my desktop, it connects as expected. When I run it from within the docker container, it fails.

I've just installed docker this afternoon and ran through the getting started for windows, so my setup state is just after running that. Here's the contents of my Dockerfile:

FROM java:8
ADD VaultServer /
EXPOSE 3971
EXPOSE 3972
ENTRYPOINT ["java", "-jar", "VaultServer.jar"]

Answer 1

Inside the data folder there is a file called pg_hba.conf you have to configure it to accept the connections. So your pg_hba.conf file should have a line like this host all all YourDockerip/24 md5 .

After that configure the postgresql.conf file. You have to update the listen_addresses to all and make sure to uncomment that line by removing the # mark. So your listen_addresses should look like this listen_addresses = '*' .