k8s: The Shift to cgroup v2 in Kubernetes: What You Need to Know
Kubernetes Official Blog
2026-10-06
Kubernetes is deprecating cgroup v1 and is moving toward cgroup v2 as the default path: in v1.35, kubelet startup fails by default on cgroup v1 nodes, and kubeadm preflight checks now error on v1.35+ when v1 is detected. The post also summarizes cgroup v2-related behaviors and features in Kubernetes 1.36, including Memory QoS, container-scoped OOM handling, PSI metrics, and in-place pod-level resource updates.