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Add cri-o criu support #10479

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Nov 8, 2023
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Add cri-o criu support #10479

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2 changes: 2 additions & 0 deletions docs/vars.md
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Expand Up @@ -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 enable the feature gate `ContainerCheckpoint` so that the kubelet get a higher level API to simplify 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.
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3 changes: 3 additions & 0 deletions roles/container-engine/cri-o/defaults/main.yml
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Expand Up @@ -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
5 changes: 5 additions & 0 deletions roles/container-engine/cri-o/templates/crio.conf.j2
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Expand Up @@ -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
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