Containerd v2

[majst01]

Description

Since Gardener 1.115 containerd v2.x is supported.

TODO:

• test with oldest possible k8s version

Works:

 $ k get node -o wide
NAME                                        STATUS   ROLES   AGE     VERSION   INTERNAL-IP   EXTERNAL-IP   OS-IMAGE                         KERNEL-VERSION   CONTAINER-RUNTIME
shoot--pnnvns--stefan-group-0-69dd6-7mhmx   Ready    node    4m19s   v1.32.6   10.128.32.2   <none>        Debian GNU/Linux 12 (bookworm)   6.1.0-37-amd64   containerd://2.1.3

One Warning remains:

Jul 04 16:31:11 shoot--pnnvns--stefan-group-0-69dd6-7mhmx health-monitor-containerd[12439]: time="2025-07-04T16:31:11+02:00" level=warning msg="DEPRECATION: The `bin_dir` property of `[plugins.\"io.containerd.cri.v1.runtime\".cni`] is deprecated since containerd v2.1 and will be removed in containerd v2.2. Use `bin_dirs` in the same section instead."

According to: https://github.com/containerd/containerd/blob/v2.0.0/RELEASES.md#kubernetes-support it is recommended to use containerd v2.x for kubernetes >= v1.30.x.

We wait until we reached this.