Test using Docker registry images instead of baked-in Dockerfiles.

Author: geerlingguy

.travis.yml

@@ -2,32 +2,32 @@
 sudo: required
 
 env:
-  - distribution: centos
-    version: 6
+  - repository: geerlingguy/docker-centos6-ansible
+    version: latest
     init: /sbin/init
     run_opts: ""
     playbook: test.yml
     DOCKER_VERSION: "1.9.1-0~trusty"
-  - distribution: centos
-    version: 7
+  - repository: geerlingguy/docker-centos7-ansible
+    version: latest
     init: /usr/lib/systemd/systemd
     run_opts: "--privileged --volume=/sys/fs/cgroup:/sys/fs/cgroup:ro"
     playbook: centos-7-test.yml
     DOCKER_VERSION: "1.9.1-0~trusty"
-  - distribution: ubuntu
-    version: 16.04
+  - repository: geerlingguy/docker-ubuntu1604-ansible
+    version: latest
     init: /lib/systemd/systemd
     run_opts: "--privileged --volume=/sys/fs/cgroup:/sys/fs/cgroup:ro"
     playbook: test.yml
     DOCKER_VERSION: "1.9.1-0~trusty"
-  - distribution: ubuntu
-    version: 14.04
+  - repository: geerlingguy/docker-ubuntu1404-ansible
+    version: latest
     init: /sbin/init
     run_opts: ""
     playbook: test.yml
     DOCKER_VERSION: "1.9.1-0~trusty"
-  # - distribution: ubuntu
-  #   version: 12.04
+  # - repository: geerlingguy/docker-ubuntu1204-ansible
+  #   version: latest
   #   init: /sbin/init
   #   run_opts: ""
   #   playbook: test.yml
@@ -43,14 +43,12 @@ before_install:
   - sudo apt-get install docker-engine=$DOCKER_VERSION -yq --no-install-suggests --no-install-recommends --force-yes -o Dpkg::Options::="--force-confnew"
 
   # Pull container
-  - 'sudo docker pull ${distribution}:${version}'
-  # Customize container
-  - 'sudo docker build --rm=true --file=tests/Dockerfile.${distribution}-${version} --tag=${distribution}-${version}:ansible tests'
+  - 'sudo docker pull ${repository}:${version}'
 
 script:
   - container_id=$(mktemp)
     # Run container in detached state
-  - 'sudo docker run --detach --volume="${PWD}":/etc/ansible/roles/role_under_test:ro ${run_opts} ${distribution}-${version}:ansible "${init}" > "${container_id}"'
+  - 'sudo docker run --detach --volume="${PWD}":/etc/ansible/roles/role_under_test:ro ${run_opts} ${repository}:${version} "${init}" > "${container_id}"'
 
   # Ansible syntax check.
   - 'sudo docker exec --tty "$(cat ${container_id})" env TERM=xterm ansible-playbook /etc/ansible/roles/role_under_test/tests/${playbook} --syntax-check'