#!/usr/bin/python
"""Check Docker images for security/distro updates. Assumes DNF."""

from __future__ import division, print_function
from docker import Client
import subprocess

c = Client(base_url='unix://var/run/docker.sock')
for container in c.containers():
  name = container['Names'][0]
  id_ = container['Id']
  image_id = c.inspect_container(id_)['Image']

  print('Container: {}'.format(name))
  print('Image: {} '.format(image_id))

  # Not using the API here for simplicity (for now)
  subprocess.call(['docker', 'run', '-t', '--rm',
                   image_id,
                   '/bin/bash', '-c',
                   'dnf -q check-update; if [ $? == 100 ]; then echo "Updates available"; fi'])