Caching Docker Image on a Disk

You can cache images that you've built or downloaded from the internet on a disk that you attach to the instance.

A configuration file has the "dockerDataRoot" parameter. It's a directory on the host OS where the Docker daemon will save all the images.

Specify the moundDir directory for one of the instance volumes and set the dockerDataRoot parameter to the same value (or to a subdirectory of the moundDir directory).

Example:

# ...

instances:
  - name: gcp-1
    provider: gcp
    parameters:
      # ...
      dockerDataRoot: /docker
      volumes:
        # ...
        - name: docker
          parameters:
            size: 10
            mountDir: /docker