Accessories

Accessories are self-contained units that run specific components of an application’s infrastructure in isolated containers. Accessories are defined under accessories.

accessories:
  postgres:
    image: postgres:17
    env:
      clear:
        POSTGRES_HOST: postgres
        POSTGRES_USER: postgres
      secret:
        - POSTGRES_PASSWORD
    volumes:
      - postgres:/var/lib/postgresql/data

Image

Specify the Docker image.

    image: postgres:17

Custom command

Set a custom command if you don’t want to use the default.

    cmd: "postgres"

Options

Options are passed to the Docker run command as --<name> <value>.

    options:
      restart: always
      cpus: 2

Environment variables

See Environment variables for full reference.

    env:
      clear:
        POSTGRES_HOST: postgres
        POSTGRES_USER: postgres
      secret:
        - POSTGRES_PASSWORD

Volumes

Define accessory volumes.

    volumes:
      - postgres:/var/lib/postgresql/data