Hey ho. I don't seem to find the latest upgrade images available for some days now. Is the system-upgrade-controller procedure no longer supported in k3s or have I hit some snag by not using "stable" channel? Back-off pulling image "ghcr.io/k3s-io/k3s-upgrade:v1.34.1-k3s1" (also tried the default docker location, rancher/k3s-upgrade). It kind of messed up my cluster (which is not a problem) so I had the idea to put this on the server plan, and it worked fine to catch these missing images before the upgrade controller starts cordoning nodes:

prepare:
    args:
    - "true"
    image: rancher/k3s-upgrade
  upgrade:
    image: rancher/k3s-upgrade

These images have never been published to ghcr. Only docker hub, under the rancher namespace, as you showed above. Where did you see that they are on ghcr?

Sorry, I started trying to download them from dockerhub but they didn't exist there (rancher/k3s-upgrade), then I realized your deployment script deploys to ghcr.io and I found the current image there, so I tested that too in case there was an issue with dockerhub. The dockerhub images seems to work now, but I think there was a day or so where the channel server was updated but the dockerhub images did not exist. Anyway, the above yaml snippet from the server plan will block until the image works, instead of starting to cordon/drain nodes.

Yeah there was an issue with CI that caused the image builds not to be triggered for the releases. That's been fixed.