templates: update Ubuntu to 24.04

[AkihiroSuda]

No description provided.

[jandubois]

Thanks, LGTM

[afbjorklund]

Do you have some documentation (notes), on how these updates are prepared ?

Not so much the major bump, from 22.04 to 24.04, but the checksums and such

• Automation for updating templates #1347

• Inherit system images and share them between examples #824

[AkihiroSuda]

Just updated manually, currently 😞

[afbjorklund]

This is a nice feature, of the new release:

https://discourse.ubuntu.com/t/noble-numbat-release-notes/39890#public-cloud-cloud-images-83

The footprint of minimal images has been reduced

-619M	ubuntu-22.04-server-cloudimg-amd64.img
+454M	ubuntu-24.04-server-cloudimg-amd64.img

422M	debian-12-generic-amd64.qcow2
329M	debian-12-genericcloud-amd64.qcow2

[afbjorklund]

New image tested OK here, as well.

I think the results from the k8s template is very good, starts a vanilla kubeadm cluster in 10 seconds:

[  168.382775] cloud-init[1813]: [init] Using Kubernetes version: v1.30.0

[  170.835847] cloud-init[1813]: [kubelet-start] Starting the kubelet
[  171.584115] cloud-init[1813]: [kubelet-check] The kubelet is healthy after 503.076679ms

[  171.584470] cloud-init[1813]: [api-check] Waiting for a healthy API server. This can take up to 4m0s
[  176.088824] cloud-init[1813]: [api-check] The API server is healthy after 4.503997398s

[  177.523608] cloud-init[1813]: Your Kubernetes control-plane has initialized successfully!

Slightly longer to pull the required images and deploy the coredns addon, but still. (for all else, k3s)