How to mount a Docker volume to my host OS (macOS)?

Question

I persist container's data to a volume (not a bind mount ) and I wonder how I can inspect this data later. For example, let's say that I use something like this to run a WordPress site:

docker-compose.yml :

services:
  wordpress:
    volumes:
      - wordpress-files:/var/www/html

volumes:
  wordpress-files:

Is it possible to start another container (based on Alpine or something) that would mount the same volume and also expose it to my host OS (macOS – I'm using Docker for Mac)? Something like this (pseudocode):

services:

  wordpress:
    image: wordpress
    volumes:
      - wordpress-files:/var/www/html

  wordpress-files-inspector:
    volumes:
      - wordpress-files:/tmp:host

volumes:
  wordpress-files:

It's possible to exec into a temporary container but I'd like to make the files available to my local filesystem so that I can use my local tools to browse them. Note that primarily, the files need to live in a named volume (for performance and other reasons) so it cannot be a bind mount like ./my-local-path:/var/www/html .

Answer 1

Why don't you just use samba? Like that:

services:

  wordpress:
    image: wordpress
    volumes:
      - wordpress-files:/var/www/html

  wordpress-files-inspector:
    image: dperson/samba
    command: sh -c "samba.sh -s \"mount;/mount\""
    volumes:
      - wordpress-files:/mount

volumes:
  wordpress-files:

You can inspect IP address of the wordpress-files-inspector container later (or set the container with static ip) and mount it into your host OS.