Changing db port - Can't Connect about docker-sonarqube

[Godin]

@IAPOLINARIO
when containers linked they can communicate internally without expose of any ports - see "Communication across links" at https://docs.docker.com/engine/userguide/networking/default_network/dockerlinks/
and

   ports:
     - "5433:5432"

affects how port will published and not how it will be visible for linked container.

So that using

$ docker images
REPOSITORY          TAG                       IMAGE ID            CREATED             SIZE
sonarqube           latest                    334aa4aa378e        8 days ago          780.4 MB
postgres            latest                    247a11721cbd        2 weeks ago         265.9 MB

$ docker --version        
Docker version 1.11.0, build 4dc5990

$ docker-compose --version
docker-compose version: 1.5.1

with docker-compose.yml

sonarqube:
   image: sonarqube
   ports:
   - "19000:9000"
   - "19092:9092"
   links:
     - sonardb
   environment:
      - SONARQUBE_JDBC_URL=jdbc:postgresql://sonardb:5432/sonar

sonardb:
   image: postgres:latest
   ports:
     - "5433:5432"
   environment:
     - POSTGRES_USER=sonar
     - POSTGRES_PASSWORD=sonar

works as expected - SonarQube communicates with PostgreSQL using port 5432 which is published for the all other world as 5433.

[IAPOLINARIO]

Uowwww...That's great! I've read about the containers link, but i didn't realize that the communication occurs internally and the port mapping it's just to externally world. This scenario it's a little trick.

I spent all day trying to connect to Postgres and my last move was make a post here. Thank's a lot!

I made the change in my docker-compose.yml and works perfectly!

PS - Using

depends_on

works in the same way.