Issue #61: Add CentOS 6.

.travis.yml

@@ -1,6 +1,14 @@
 sudo: required
 
 env:
+  # CentOS 6.
+  - distribution: centos
+    version: 6
+    container_id: $(mktemp)
+    dockerfile: Dockerfile.centos-6
+    init: /sbin/init
+    run_opts: "--privileged --volume=/sys/fs/cgroup:/sys/fs/cgroup:ro"
+
   # CentOS 7.
   - distribution: centos
     version: 7
@@ -37,7 +45,7 @@ before_install:
 
 script:
   # Run container in detached state.
-  - sudo docker run --detach --volume="${PWD}":/etc/ansible/roles/role_under_test:ro ${run_opts} ${distribution}:ansible "${init}" > "${container_id}"
+  - 'sudo docker run --detach --volume="${PWD}":/etc/ansible/roles/role_under_test:ro ${run_opts} ${distribution}:ansible "${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/test.yml --syntax-check'

tests/Dockerfile.centos-6

@@ -0,0 +1,11 @@
+FROM centos:6
+
+# Install Ansible
+RUN rpm -Uvh http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm
+RUN yum install -y ansible
+
+# Disable requiretty
+RUN sed -i -e 's/^\(Defaults\s*requiretty\)/#--- \1/'  /etc/sudoers
+
+# Install Ansible inventory file
+RUN echo -e '[local]\nlocalhost ansible_connection=local' > /etc/ansible/hosts