Using dots in Docker Compose

Docker Compose v1

Assuming you have a demo app which has services defined in a Docker Compose v1 file:

web:
  build: .
  ports:
   - "5000:5000"
redis:
  image: "redis:alpine"

To dotmesh-enable the redis, simply add these three lines at the bottom of the file:

web:
  build: .
  ports:
   - "5000:5000"
redis:
  image: "redis:alpine"
  volume_driver: dm
  volumes:
   - "demo.redis:/data"

Note that this example creates a dot called demo with a subdot called redis.

Docker Compose v2 and v3

Define your volumes centrally under the top-level volumes, then refer to them by name in your services.

For example, starting with a file that looks like:

version: '3'

services:
  web:
    build: .
    ports:
     - "5000:5000"
  redis:
    image: "redis:alpine"

Update it accordingly:

version: '3'

volumes:
  demo.redis:
    driver: dm

services:
  web:
    build: .
    ports:
     - "5000:5000"
  redis:
    image: "redis:alpine"
    volumes:
     - "demo.redis:/data"

This works in the same way for Docker Compose v2 and v3 files.