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dockerdocker-composedocker-volume

docker-compose: define mount for bind mount and managed mount

I'm using docker-compose for defining my service. In docker, there are two concepts for docker volume. Firstly is about bind mount: mount on host storage.

docker run -d --name web-app -v $HOST/location:/container/location -p 80:80 httpd:latest

Secondly is about managed mount: abstract storage, not depend on host.

docker run -d --name web-app -v /container/location -p 80:80 httpd:latest

I want to map those concepts to docker-compose. It means how can I define bind mount and managed mount when using docker-compose.

Solution

  • You can find these Docker concepts in the volumes section of Docker Compose: https://docs.docker.com/compose/compose-file/#/volumes-volumedriver

    Examples:

    volumes:
  # Just specify a path and let the Engine create a volume
  - /container/location

  # Specify an absolute path mapping
  - ./myfolder/location:/container/location