version: '2'

services:

  foo:
    image: busybox
    command: sleep 3600
    volumes:
       - /foo1
       - /foo2
    volumes_from:
       - cat


  bar:
    image: busybox
    command: sleep 3600
    volumes:
       - /foo1
       - /bar
    volumes_from:
       - foo

  cat:
    image: busybox
    command: sleep 3600
    volumes:
      - /cat