Resources

  • Volumes (not docker-compose specific)

Docker compose

Mount ./foo in same directory as docker-compose file as /root/bar/foo.

volumes:
  - "./foo:/root/bar"

Be sure to use ./ before a directory name, otherwise is assumed to be a named volume and given an error. If you just do "foo" it will be mounted as /root/foo` but empty.

You can also ~/foo or /foo.

Samples from compose file docs.

Short syntax

  • docker-compose.yml ``` volumes:

    Just specify a path and let the Engine create a volume

    • /var/lib/mysql

    Specify an absolute path mapping

    • /opt/data:/var/lib/mysql

    Path on the host, relative to the Compose file

    • ./cache:/tmp/cache

    User-relative path

    • ~/configs:/etc/configs/:ro

    Named volume

    • datavolume:/var/lib/mysql ```

Named volumes

  • docker-compose.yml 
      version: "3.8"

  services:
    web:
      image: nginx:alpine
      volumes:
        - type: volume
          source: mydata
          target: /data
          volume:
            nocopy: true
        - type: bind
          source: ./static
          target: /opt/app/static

    db:
      image: postgres:latest
      volumes:
        - "/var/run/postgres/postgres.sock:/var/run/postgres/postgres.sock"
        - "dbdata:/var/lib/postgresql/data"

  volumes:
    mydata:
    dbdata: