TOOL » VIRTUAL_ENVIRONMENT » DOCKER_COMPOSE

Volumes

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Reference:docs.docker.com

Configuration ​

Short syntax ​

The short syntax uses the generic [SOURCE:]TARGET[:MODE] format.

yaml
services:
  app:
    volumes:
      - /code/node_modules       # Volume
      - data:/code/node_modules  # Named volume
      - .:/code                  # Bind mount
volumes:
  data:

When bind mounting, the host path can be a

  1. Full path
  2. Relative path (must start with ./)
  3. User relative path (use ~/)

As for the MODE, it can be ro for read-only or rw for read-write (default).

Usage ​

Bind mount a directory ~/code and exclude ~/code/node_modules.

yaml
services:
  app:
    volumes:
      - ~/code:/code        # Bind mount
      - /code/node_modules  # Volume

The volume created "hides" from the bind mount the node_modules folder.

Be careful that if /code/node_modules doesn't exist in the image, the directory will be created and owned by root. Create it beforehand and chown it by a user if it is not desired.