[Django]-Docker-compose with django could not translate host name "db" to address: Name or service not known

Add network, link and depends_on configuration in docker compose file.

example:

  services:
      db:
          build: .
          container_name: db
          networks:
              - djangonetwork
      web:
          build: .
          depends_on:
             - db
          links:
             - db:db
          networks:
             - djangonetwork

  networks:
      djangonetwork:
          driver: bridge

To the others experiencing this.

The following command (which removes all unused containers, networks, images, and optionally, volumes) solve my problem:

docker system prune

See docker document for more information

Answering my question, this was a stupid one…

My manage.py was selecting only the base.py settings file, and was not taking into account the staging.py settings file. So it was breaking in the CLI and was not breaking inside the app.

In the “django” part of your docker-compose.yml under “depends_on” section try adding links: - db:db after it, or even replace the depends_on: db with that.

I’ll bet if you typed in docker logs (container name) you’d see it’s obviously having trouble working out where “db” points to.

I think they’re looking to end support for links in docker-compose in new iterations at least I read that somewhere..

FWIW, for anyone using Podman, this issue could be due to the containers not being able to find each other within the network. This post helped me solve the problem
https://github.com/containers/podman/issues/9292.

Essentially, you also need to make sure that the network’s dns_enable is set to true.

If you use docker (compose), you can try:

1. Terminal: docker compose down --remove-orphans
2. Terminal: docker compose up -d

The problem seems to occure because of stale containers/networks which are interfering with the DNS resolution. By using docker system prune or a simple down and up you remove/restart those containers. By using --remove-orphans you also take care of containers not started by the docker-compose.yml

click on this link to get your answer or add command: bash -c "python manage.py migrate && python manage.py runserver 0.0.0.0:8000" in docker-compose.yaml.I hope this will work for you. It worked for me