The upgrade rancher dilemna

OK.

It's been awhile since I have not upgraded Rancher and the K3S cluster infra and I think it's maybe thge good time to upgrade my infra to be up to date.

Problem is that I fear this upgrade because I went in the past into some big issues like the rancher webgui not accessible and haf to restore back all the vms of the infra.

But well, that's not a good reason to not to upgrade!

So, I have decided to make it more clean and have a way to:

1. Backup
2. Plan
3. Test
4. Do
5. Validate

the update tasks.

This time I really be organized and do this update onece for all!