Merge pull request #971 from travis-ci/aj-docker-17.12.1-ce

Upgrade Docker from 17.09.0-ce to 17.12.1-ce

Author: soulshake

cookbooks/travis_docker/attributes/default.rb

@@ -2,14 +2,14 @@
 # Trusty and Xenial. When updating check the version exists in both of:
 # https://download.docker.com/linux/ubuntu/dists/trusty/stable/binary-amd64/Packages
 # https://download.docker.com/linux/ubuntu/dists/xenial/stable/binary-amd64/Packages
-default['travis_docker']['version'] = '17.09.0~ce-0~ubuntu'
+default['travis_docker']['version'] = '17.12.1~ce-0~ubuntu'
 default['travis_docker']['users'] = %w[travis]
 default['travis_docker']['compose']['url'] = 'https://github.com/docker/compose/releases/download/1.17.1/docker-compose-Linux-x86_64'
 default['travis_docker']['compose']['sha256sum'] = 'db0a7b79d195dc021461d5628a8d53eeb2e556d2548b764770fccabb0a319dd8'
 default['travis_docker']['update_grub'] = true
 default['travis_docker']['binary']['url'] = "https://download.docker.com/linux/static/stable/#{node['kernel']['machine']}/docker-17.09.0-ce.tgz"
-default['travis_docker']['binary']['version'] = '17.09.0-ce'
-default['travis_docker']['binary']['checksum'] = 'a9e90a73c3cdfbf238f148e1ec0eaff5eb181f92f35bdd938fd7dab18e1c4647'
+default['travis_docker']['binary']['version'] = '17.12.1-ce'
+default['travis_docker']['binary']['checksum'] = 'f1722346f98463e44018dc9f1ce5c56c4b203d4237ecc8f4b4fbc1eac1693f18'
 if node['kernel']['machine'] == 'ppc64le'
   default['travis_docker']['binary']['checksum'] = 'f00d4cefd392893241e5ae3be292ade0e9076cbba6fde56e731ae5002558b82a'
 end