fix: Copy ClusterClass and Templates only if they do not already exist #1386
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When a failure like this happens, does it prevent the rest of the resources from being copied or is this more about fixing the controller from continuously failing? |
It is possible for some resource to exist, but a copy of it cannot be created. For example, CAPX validation became more strict without changing its API version. Templates already on the cluster remain usable. However, they cannot be copied, because the copy does not pass validation. Prior to this change, we always copied the template, and ignored the "already exists" error. Now we first check if the template exist, and only create it if it does not.
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Good question. The failure does prevent the rest of the resources from being copied. In practice, we have only seen this failure when attempting to copy (a second time) a ClusterClass that is already copied, but that cannot be copied again (due to a backward incompatible change in the CEL validation for the resource). |
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What problem does this PR solve?:
It is possible for some resource to exist, but a copy of it cannot be created. For example, CAPX validation became more strict without changing its API version. Templates already on the cluster remain usable. However, they cannot be copied, because the copy does not pass validation.
Prior to this change, we always copied the template, and ignored the "already exists" error. Now we first check if the template exist, and only create it if it does not.
Which issue(s) this PR fixes:
Fixes NCN-110955
How Has This Been Tested?:
New unit tests exercise the changes.
Special notes for your reviewer: