Use cgroupsv2 where available (fedora) (#8237)

* Containerd: use cgroupsv2 where available (fedora)

* Docker: use cgroupsv2 where available (fedora)

* cri-o: use cgroupsv2 where available (fedora)

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

@@ -5,22 +5,6 @@
   when:
     - ansible_distribution not in ["CentOS", "OracleLinux", "RedHat", "Ubuntu", "Debian", "Fedora", "AlmaLinux", "Rocky", "Amazon", "Flatcar", "Flatcar Container Linux by Kinvolk", "Suse", "openSUSE Leap", "openSUSE Tumbleweed"]
 
-- name: disable unified_cgroup_hierarchy in Fedora 31+
-  command: grubby --update-kernel=ALL --args="systemd.unified_cgroup_hierarchy=0"
-  when:
-    - ansible_distribution == "Fedora"
-    - (ansible_distribution_major_version | int) >= 31
-    - ansible_proc_cmdline['systemd.unified_cgroup_hierarchy'] is not defined or ansible_proc_cmdline['systemd.unified_cgroup_hierarchy'] != '0'
-    - not is_ostree
-
-- name: reboot in Fedora 31+
-  reboot:
-  when:
-    - ansible_distribution == "Fedora"
-    - (ansible_distribution_major_version | int) >= 31
-    - ansible_proc_cmdline['systemd.unified_cgroup_hierarchy'] is not defined or ansible_proc_cmdline['systemd.unified_cgroup_hierarchy'] != '0'
-    - not is_ostree
-
 - name: containerd | Remove any package manager controlled containerd package
   package:
     name: "{{ containerd_package }}"

roles/container-engine/cri-o/tasks/main.yaml

@@ -35,22 +35,6 @@
   tags:
     - facts
 
-- name: disable unified_cgroup_hierarchy in Fedora 31+
-  command: grubby --update-kernel=ALL --args="systemd.unified_cgroup_hierarchy=0"
-  when:
-    - ansible_distribution == "Fedora"
-    - (ansible_distribution_major_version | int) >= 31
-    - ansible_proc_cmdline['systemd.unified_cgroup_hierarchy'] is not defined or ansible_proc_cmdline['systemd.unified_cgroup_hierarchy'] != '0'
-    - not is_ostree
-
-- name: reboot in Fedora 31+
-  reboot:
-  when:
-    - ansible_distribution == "Fedora"
-    - (ansible_distribution_major_version | int) >= 31
-    - ansible_proc_cmdline['systemd.unified_cgroup_hierarchy'] is not defined or ansible_proc_cmdline['systemd.unified_cgroup_hierarchy'] != '0'
-    - not is_ostree
-
 - name: import crio repo
   import_tasks: "crio_repo.yml"
   when: crio_add_repos

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

@@ -40,20 +40,6 @@
   tags:
     - facts
 
-- name: disable unified_cgroup_hierarchy in Fedora 31+
-  command: grubby --update-kernel=ALL --args="systemd.unified_cgroup_hierarchy=0"
-  when:
-    - ansible_distribution == "Fedora"
-    - (ansible_distribution_major_version | int) >= 31
-    - ansible_proc_cmdline['systemd.unified_cgroup_hierarchy'] is not defined or ansible_proc_cmdline['systemd.unified_cgroup_hierarchy'] != '0'
-
-- name: reboot in Fedora 31+
-  reboot:
-  when:
-    - ansible_distribution == "Fedora"
-    - (ansible_distribution_major_version | int) >= 31
-    - ansible_proc_cmdline['systemd.unified_cgroup_hierarchy'] is not defined or ansible_proc_cmdline['systemd.unified_cgroup_hierarchy'] != '0'
-
 - import_tasks: pre-upgrade.yml
 
 - name: ensure docker-ce repository public key is installed