feat: Adding a check which determines if cgroups are enabled on a node (#11163) (#11165)

roles/kubernetes/preinstall/tasks/0040-verify-settings.yml

@@ -77,6 +77,13 @@
     - not ignore_assert_errors
     - inventory_hostname in groups['kube_node']
 
+# This command will fail if cgroups are not enabled on the node.
+# For reference: https://kubernetes.io/docs/concepts/architecture/cgroups/#check-cgroup-version
+- name: Stop if cgroups are not enabled on nodes
+  command: stat -fc %T /sys/fs/cgroup/
+  changed_when: false
+  when: not ignore_assert_errors
+
 # This assertion will fail on the safe side: One can indeed schedule more pods
 # on a node than the CIDR-range has space for when additional pods use the host
 # network namespace. It is impossible to ascertain the number of such pods at