Kubernetes v1.35: Timbernetes — Only the Important Parts (Part 1): Deprecations, removals

Removal of cgroup v1 support
Cgroup v2 is now the modern standard, Kubernetes is ready to retire the legacy cgroup v1 support in v1.35. This is an important notice for cluster administrators: if you are still running nodes on older Linux distributions that don't support cgroup v2, your `kubelet` will fail to start. To avoid downtime, you will need to migrate those nodes to systems where cgroup v2 is enabled.

Deprecation of ipvs mode in kube-proxy
Because of this maintenance burden, Kubernetes v1.35 deprecates `ipvs` mode. Although the mode remains available in this release, `kube-proxy` will now emit a warning on startup when configured to use it.

Final call for containerd v1.X
While Kubernetes v1.35 still supports containerd 1.7 and other LTS releases, this is the final version with such support. The SIG Node community has designated v1.35 as the last release to support the containerd v1.X series.