Manage containerd.io package with docker CRI. (#6218)

* Manage containerd.io package with docker CRI.

* Refactor common containerd stuff to separate role

* Fix check mode and unnecessary shell.

roles/container-engine/docker/tasks/main.yml

@@ -196,6 +196,7 @@
     - docker_task_result is failed
     - ansible_distribution == 'Ubuntu'
   register: available_packages
+  check_mode: false
 
 - name: show available packages on ubuntu
   fail:
@@ -239,6 +240,7 @@
   command: "docker version -f '{{ '{{' }}.Client.Version{{ '}}' }}'"
   register: installed_docker_version
   changed_when: false
+  check_mode: false
 
 - name: check minimum docker version for docker_dns mode. You need at least docker version >= 1.12 for resolvconf_mode=docker_dns
   fail:

roles/container-engine/docker/tasks/systemd.yml

@@ -17,6 +17,7 @@
   register: systemd_version
   when: not is_ostree
   changed_when: false
+  check_mode: false
 
 - name: Write docker.service systemd file
   template: