This error occurs when the kubelet cannot properly manage container cgroups, typically due to incorrect driver configuration or cgroup issues.
The "Kubelet cgroup manager error" indicates that the kubelet cannot configure cgroups for containers.
cat /etc/kubernetes/kubelet.conf | grep cgroupDriver
docker info | grep Cgroup || containerd config dump | grep cgroup
Edit /etc/kubernetes/kubelet.conf to set cgroupDriver
Update container runtime cgroup driver
Ensure kubelet and container runtime use same cgroup driver: systemd or cgroupfs.
Failed to connect to server: connection refused (HTTP/2)
How to fix "HTTP/2 connection refused" error in Kubernetes
missing request for cpu in container
How to fix "missing request for cpu in container" in Kubernetes HPA
error: invalid configuration
How to fix "error: invalid configuration" in Kubernetes
sudo systemctl restart kubelet