How do I get microk8s working in WSL as a worker? Works fine in native install but GPU using WSL does not

General Discussions Windows
1

I am trying to add my windows machine as a worker on my existing k8s cluster. I tried adding it with a native windows microk8s install but it wouldn’t work with the GPU so I tried to install in WSL. Now it is installed but when I try to add it as a worker to my existing node it doesn’t show up

...:~$ microk8s add-node
From the node you wish to join to this cluster, run the following:
microk8s join 10.0.0.58:25000/....

Use the '--worker' flag to join a node as a worker not running the control plane, eg:
microk8s join 10.0.0.58:25000/... --worker

If the node you are adding is not reachable through the default interface you can use one of the following:
microk8s join 10.0.0.58:25000/...
microk8s join 172.17.0.1:25000/...
microk8s join fd35:84cd:bbef:386f:3602:86ff:fe40:8e27:25000/...

And I join using that on the WSL side

... ~ -  $ sudo microk8s leave
Configuring services.
Generating new cluster certificates.
Waiting for node to start.
 ~ -  $ microk8s join 10.0.0.58:25000/.... --worker
Contacting cluster at 10.0.0.58
The node has joined the cluster and will appear in the nodes list in a few seconds.

This worker node gets automatically configured with the API server endpoints.
If the API servers are behind a loadbalancer please set the '--refresh-interval' to '0s' in:
    /var/snap/microk8s/current/args/apiserver-proxy
and replace the API server endpoints with the one provided by the loadbalancer in:
    /var/snap/microk8s/current/args/traefik/provider.yaml

Successfully joined the cluster.

So it looks good but when I go to the control node and run microk8s kubectl get nodes -o wide I don’t see the node

...:~$ microk8s kubectl get nodes -o wide
NAME   STATUS   ROLES    AGE   VERSION   INTERNAL-IP   EXTERNAL-IP   OS-IMAGE             KERNEL-VERSION     CONTAINER-RUNTIME
yoda   Ready    <none>   31m   v1.32.2   10.0.0.58     <none>        Ubuntu 24.04.2 LTS   6.8.0-56-generic   containerd://1.6.36

How can I find out why it isn’t adding the node even though it says it is? This worked fine when I did it with the native windows install of microk8s (just no GPU) so is it something to do with WSL?

2

Looks like it might be related to this

cp: cannot stat '/var/snap/microk8s/7731/var/kubernetes/backend/localnode.yaml': No such file or directory

WARNING:  This machine's hostname contains capital letters and/or underscores.
          This is not a valid name for a Kubernetes node, causing node registration to fail.
          Please change the machine's hostname or refer to the documentation for more details:
          https://microk8s.io/docs/troubleshooting#heading--common-issues

I tried reinstalling but it isn’t helping.