version: "3.5"
services:
  database:
    container_name: proj-database
    env_file: ../orm/.env.${PROJ_ENV}
    image: postgres
    restart: always
    expose:
      - 5433
    ports:
     - 5432:5432
     - 5433:5432
    networks:
      - proj

I can connect from other containers with 5432, but i can't from other containers connect with 5433. Whats the problem?

CodePudding user response：

Connections between containers always use the "normal" port number for the destination service. They don't consider any remappings in ports:; in fact, they don't need ports: at all. ports: are only used for connections from outside Docker into a container. Conversely, since internally each container has its own private IP address, there aren't conflicts even if you are running multiple copies of the same image.