document how upgrades work about terraform-openstack-rke2

[dhrp]

Oh, and I found this file .terraform/tmp/rke2/a25fdd70-8f4d-4b2e-8336-b0cb75389ab0- locally, but the file is empty

[remche]

I agree that upgrade mechanism is not really much (not at all...) documented, probably because it's a bit hacky and we don't use it much.

I just tested it though and it went well. To trigger the upgrade, you need the both do_upgrade and rke2_version to be set.

FYI, the code is here :
https://github.com/remche/terraform-openstack-rke2/blob/master/modules/node/main.tf#L97
and the script here :
https://github.com/remche/terraform-openstack-rke2/blob/master/modules/node/files/cloud-init.yml.tpl#L10

I will update the doc if you confirm it's working for you.

[dhrp]

Thanks! I actually also figured it out a bit later and found it works well. I tried an upgrade and a downgrade.

And I think all these versions / combinations are supported:
https://github.com/rancher/rke2/tags

[remche]

For the CLI fans :
gh release -R rancher/rke2 list