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k8s

A collection of 5 posts

Resize additional disks in Siderolabs Talos Linux

Resize additional disks in Siderolabs Talos Linux

"Talos will automatically resize the system disk partition(s) if the underlaying block size changes, but not user-managed disks. You would need to schedule a privileged pod with the host /dev/ mounted (kubectl debug node/<name> can do this for you) and use xfs_growfs to expand

List all resources in a namespace

List all resources in a namespace

A couple of times I needed to check what resources where still in a namespace, to understand why the namespace was still deleting after a while. The kubectl get all -n namepace-name does not show all the resources so I found in internet this clever little command to show everything:

Port-Forward Kubernetes service or pod port to local port

Port-Forward Kubernetes service or pod port to local port

You often need to troubleshoot an application and one of the first step is to port-forward the container (or the service) to check if it's working cerrectly: kubectl port-forward pod/mypod 8888:5000 Or to port-forward a service: kubectl --namespace default port-forward service/default-svc 8080:80 Other examples:

Helm Debugging

Especially using GitOps and Helm Charts with ArgoCD it took me a while to understand how to check the manifests resulting from templating. First you have to be in the folder containing the Halm Chart, then you have to build the dependencies: helm dependency build . Then you can generate locally

Rotate GitHub PAT on Flux

Rotate GitHub PAT on Flux

If your GitHub token is expired and you need to update it these are the steps you need to take: * Delete the auth secret from the cluster with kubectl -n flux-system delete secret flux-system * Re-run flux bootstrap with the same args as the first time Source: https://github.com/fluxcd/