cgroups vs systemd?

ivonet

quote from LFD259: "Both cgroups and Linux namespaces are at the heart of containers today, including Docker."
why is it then that during installation of docker you get warnings that cgroups should be replaced with systemd?
Same goes for the pre-flight checks of kubeadm?

    [preflight] Running pre-flight checks
[WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". P. lease follow the guide at https://kubernetes.io/docs/setup/cri/

chrispokorni

Hi @ivonet,

As Kubernetes transitions away from supporting Docker as its runtime, such warnings will be occasionally seen during cluster init phases.

Regards,
-Chris

ivonet

thanks