Support Rootless Docker / Kubernetes

[BenTheElder]

What would you like to be added:

Support for "rootless" docker hosts, docker 20.X should support this.

Why is this needed:

To continue working with the ecosystem as it moves forward.

• KIND PR blocked on the issues below Support Rootless Docker #1727

Related issues / PRS:

• kubelet, cgroupv2: make hugetlb optional kubernetes/kubernetes#93012
• Remove runc default devices that overlap with spec devices. opencontainers/runc#2522
• cgroup2: /sys/fs/cgroup/sys/fs/cgroup is created kubernetes/kubernetes#94104
  • Fix pending in cgroup2: /sys/fs/cgroup/sys/fs/cgroup is created kubernetes/kubernetes#94104
• kubelet & kube-proxy: ignore sysctl errors and rlimit errors when running in UserNS (for rootless) kubernetes/kubernetes#92863
  • Blocked on This KEP being accepted sig-node: Kubelet-in-UserNS, aka Rootless mode kubernetes/enhancements#1371

[BenTheElder]

I would also assign @AkihiroSuda but they're not an org member so github won't let me (kubernetes does not do repo level collaboration by policy, only org membership 🤷)

Consider them assigned anyhow 🙃 (and thank you!)

[spiffxp]

(FWIW I think GitHub has changed permissions such that if they comment on this issue then they can be assigned)

[AkihiroSuda]

👍

[spiffxp]

/assign @AkihiroSuda
let's find out

[AkihiroSuda]

/remove-lifecycle stale