Disable docker-ce yum repo by default / cleanups (#7080)

Upgrading docker / containerd without adapting the configuration might break the node,
so disable docker-ce repo by default.
We are already using dpkg hold for Debian.

All containerd.io packages provide /usr/bin/runc, so no need to check

yum_conf was never used for containerd

module_hotfixes should not be needed with the EL8 repo

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>

roles/container-engine/containerd/tasks/containerd_repo.yml

@@ -65,18 +65,3 @@
   when:
     - ansible_distribution in ["CentOS","RedHat"]
     - yum_result.results | length == 0
-
-- name: Copy yum.conf for editing
-  copy:
-    src: "{{ yum_conf }}"
-    dest: "{{ containerd_yum_conf }}"
-    remote_src: yes
-  when: ansible_distribution in ["CentOS","RedHat"]
-
-- name: Edit copy of yum.conf to set obsoletes=0
-  lineinfile:
-    path: "{{ containerd_yum_conf }}"
-    state: present
-    regexp: '^obsoletes='
-    line: 'obsoletes=0'
-  when: ansible_distribution in ["CentOS","RedHat"]

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

@@ -95,9 +95,9 @@
   args:
     pkg: "{{ item.name }}"
     force: "{{ item.force | default(omit) }}"
-    conf_file: "{{ item.yum_conf | default(omit) }}"
     state: present
     update_cache: "{{ omit if ansible_distribution == 'Fedora' else True }}"
+    enablerepo: "{{ item.repo | default(omit) }}"
   register: containerd_task_result
   until: containerd_task_result is succeeded
   retries: 4
@@ -109,26 +109,6 @@
     - containerd_package_info.pkgs|length > 0
   ignore_errors: true
 
-- name: Check if runc is installed
-  stat:
-    path: "{{ runc_binary }}"
-  register: runc_stat
-
-- name: Install runc package if necessary
-  action: "{{ containerd_package_info.pkg_mgr }}"
-  args:
-    pkg: runc
-    state: present
-    update_cache: "{{ omit if ansible_distribution == 'Fedora' else True }}"
-  register: runc_task_result
-  until: runc_task_result is succeeded
-  retries: 4
-  delay: "{{ retry_stagger | d(3) }}"
-  notify: restart containerd
-  when:
-    - not is_ostree
-    - not runc_stat.stat.exists
-
 - name: Ensure latest version of libseccomp installed  # noqa 403
   package:
     name: libseccomp