Test Kitchen, Docker and CentOS 7

Whilst trying to add some tests to some Chef cookbooks that run on CentOS 7, I ran into an issue where systemd wouldn't start in a docker container (and so my services wouldn't start up). It was failing with the following error: Failed to get D-Bus connection: Operation not permitted

The solution was to make the container privileged and to set run_command to /usr/sbin/init. systemd still shows that performance is degraded, but at least it starts my services now. Here's a complete .kitchen.yml that solves the issue for me:

yaml
---
driver:
  name: docker
  use_sudo: false
  privileged: true
  run_command: /usr/sbin/init
provisioner:
  name: chef_zero
platforms:
  - name: centos
    image: centos:7
suites:
  - name: default
    run_list: []