Support Debian Bullseye

[ieugen]

Summary

Debian 11 was released recently and it would be nice to have it on the list of supported operating systems.

This should track support for it.

Will probably try to setup k3s on it in the next few weeks and report back.

[Nothing4You]

note that flannel vxlan is broken on bullseye: k3s-io/k3s#3863

[covert8]

debian 11 also switched to nftables as the default, this means that you need to switch to legacy iptables
https://rancher.com/docs/k3s/latest/en/advanced/#enabling-legacy-iptables-on-raspbian-buster

[xanmanning]

Needs a whole host of checks I think, I did have a look at how to check for iptables but I needed to create a dict to select the right package names.

On my radar.

[ieugen]

According to https://andrewmunro.me/posts/2021/08/creating-a-k3s-cluster-on-debian-11-bullseye-step-1-provision/

there is k3s check-config and k3s-io/k3s#900 (comment)

Solution would be to: set GRUB_CMDLINE_LINUX="systemd.unified_cgroup_hierarchy=0" . Then, restart .

I am working to see if this works on a raspberry pi.

[ieugen]

I failed to make it work on the Raspberry PI4 running debian 11.

k3s starts but can't connect to master node because it can't get ceertificates from localhost:6444 which is redirected to master node via iptables I believe.

However, iptables -L shows empty rules.

Will try again when I get some time for this.

[xanmanning]

Does it work on Debian Buster with k3s version >= 1.22.2 ?

[xanmanning]

Should be fixed in v2.12.0

[agross]

I could install on Raspbian Bullseye after installing the iptables package. The link provided in the error message is a bit misleading because it refers to Raspbian Buster.

[onedr0p]

This looks to be fixed upstream with v1.22.3+k3s1, see this issue: k3s-io/k3s#4188