Docker expose link to host machine

I am using a docker-compose.yml file for an application service and a database service:

version: '2'

     image: app-image
     container_name: app-container
       - "5000:5000"
       - my-network
       - db-service

     image: db-image
     container_name: db-container
       - "5432:5432"
       - my-network

    driver: bridge

The application service connects to the database using a connection string with the db-service as host:

  • docker-compose tries to pull already existing images
  • how to run a daemon process in docker container with API/v1.5?
  • lstate error: no such file or directory while building Docker from a custom image with Docker build command
  • Docker: Mysql crashes after few seconds when it has been started
  • How does Docker run a Linux kernel under macOS host?
  • Permission denied when running a container (docker 1.12.5)
  • "User ID=postgres;Password=password;Host=db-service;Port=5432;Database=my-table;Pooling=true;"

    That works fine on the running app container but I also need to access the database using the same connection string from my host machine. (for database migrations during development)

    • I thought about adding a route to my host machine:
      db-service -> localhost But this is not a good solution since it depends on the host operating system.

    • I tried to use localhost in the connection string since my host machine then connects to the database container. But obviously the application container will not connect any more.

    • I also played around with network_mode settings and network driver in the compose file but had no luck with that.

    How can I use the same hostname in a container like in my host machine?

  • Jekyll gem install error: unable to convert “\xC3” to UTF-8 in conversion from ASCII-8BIT to UTF-8 to US-ASCII for
  • How to build docker image frome .drone.yml?
  • Can I clean /var/lib/docker/tmp?
  • How to run a Windows GUI application from a Windows VM on a Docker installed on windows?
  • cloudera manager can only inspect one host at a time
  • Is Docker image updated incrementally in production environment
  • One Solution collect form web for “Docker expose link to host machine”

    The only way you could use the same connection string for both your app-service and your host would be to update your host’s /etc/hosts file with: db-service

    (or use your if you’re running on Docker machine)

    But this solution may not be the cleanest one.
    The best one would, IMO, be not to use the same connection string.

    Docker will be the best open platform for developers and sysadmins to build, ship, and run distributed applications.