Note for cgroups v2 Kubernetes

notes.md

Enable cgroups v2

# grubby --update-kernel=ALL --args="systemd.unified_cgroup_hierarchy=1"
# cat /etc/systemd/system/enable-cgroups.service 
[Service]
ExecStart=/bin/sh -c 'echo "+io +cpu +memory +pids +cpuset" > /sys/fs/cgroup/cgroup.subtree_control; mkdir /sys/fs/cgroup/user.slice; echo "+io +cpu +memory +pids +cpuset" > /sys/fs/cgroup/user.slice/cgroup.subtree_control'
Type=oneshot

[Install]
WantedBy=multi-user.target

Components

• crun - https://github.com/giuseppe/crun
• CRI-O - https://github.com/giuseppe/cri-o/tree/cgroup2
• Kubernetes - https://github.com/giuseppe/kubernetes/tree/cgroupv2

To vendor

• cadvisor - https://github.com/giuseppe/cadvisor/tree/libcontainer-cgroupv2
• runc - https://github.com/giuseppe/runc/tree/cgroupv2