Drop support for Docker runtime (in favor of containerd?)

[geerlingguy]

See: https://twitter.com/Dixie3Flatline/status/1334188919215116291

Basically, Kubernetes 1.20 and on are going to drop support for Docker as the container runtime on nodes—so it would be best to switch to something like containerd or CRI-O.

[geerlingguy]

It doesn't technically affect the way this role works, but the tests would need to be updated to drop docker: https://github.com/geerlingguy/ansible-role-kubernetes/blob/master/molecule/default/converge.yml#L28

[sculley]

+1 for containerd

[Spirit-act]

+1 CRI-O

[geerlingguy]

Related: https://github.com/geerlingguy/raspberry-pi-dramble/issues/187

[learmond]

+1 for containerd

[liipe91]

Containerd

[rdxmb]

I already run this role together with https://github.com/geerlingguy/ansible-role-containerd, which works very fine. However, the cgroup driver should be changed to systemd. Probably this should be done with https://github.com/geerlingguy/ansible-role-containerd/issues/2

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[ambled]

+1

[geerlingguy]

See latest commit, linked above.