Add cri-o criu support

Signed-off-by: tu1h <[email protected]>

docs/vars.md

@@ -186,6 +186,8 @@ Stack](https://github.com/kubernetes-sigs/kubespray/blob/master/docs/dns-stack.m
 * *containerd_additional_runtimes* - Sets the additional Containerd runtimes used by the Kubernetes CRI plugin.
   [Default config](https://github.com/kubernetes-sigs/kubespray/blob/master/roles/container-engine/containerd/defaults/main.yml) can be overridden in inventory vars.
 
+* *crio_criu_support_enabled* - When set to `true`, enables the container checkpoint/restore in CRI-O. It's required to install [CRIU](https://criu.org/Installation) on the host when dumping/restoring checkpoints. And It's recommended to set feature gate `ContainerCheckpoint=true` for Kubelet to get higher API to simplfiy the operations(**Note**: It's still in experimental stage, just for container analytics so far). You can follow the [documentation](https://kubernetes.io/blog/2022/12/05/forensic-container-checkpointing-alpha/).
+
 * *http_proxy/https_proxy/no_proxy/no_proxy_exclude_workers/additional_no_proxy* - Proxy variables for deploying behind a
   proxy. Note that no_proxy defaults to all internal cluster IPs and hostnames
   that correspond to each node.

roles/container-engine/cri-o/defaults/main.yml

@@ -97,3 +97,6 @@ crio_man_files:
   8:
     - crio
     - crio-status
+
+# If set to true, it will enable the CRIU support in cri-o
+crio_criu_support_enabled: false

roles/container-engine/cri-o/templates/crio.conf.j2

@@ -273,6 +273,11 @@ pinns_path = ""
 pinns_path = "{{ bin_dir }}/pinns"
 {% endif %}
 
+{% if crio_criu_support_enabled %}
+# Enable CRIU integration, requires that the criu binary is available in $PATH.
+enable_criu_support = true
+{% endif %}
+
 # The "crio.runtime.runtimes" table defines a list of OCI compatible runtimes.
 # The runtime to use is picked based on the runtime_handler provided by the CRI.
 # If no runtime_handler is provided, the runtime will be picked based on the level