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Use patches for adding and removing finalizers #118

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mprahl
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@mprahl mprahl commented Apr 6, 2023

Using update can have unintended consequences such as setting empty values of fields that were nil on the server. This happens for the evaluationInterval field where if it wasn't set, the update adds an empty map, which triggers the spec-sync to remove the nil map. This unnecessary spec-sync update causes the status update to fail later on in the ConfigurationPolicy processing.

Additionally, when a finalizer can't be added or removed, the evaluation stops and would be retried on the next run. This is a safer approach.

Using update can have unintended consequences such as setting empty
values of fields that were nil on the server. This happens for
the evaluationInterval field where if it wasn't set, the update adds an
empty map, which triggers the spec-sync to remove the nil map. This
unnecessary spec-sync update causes the status update to fail later on
in the ConfigurationPolicy processing.

Additionally, when a finalizer can't be added or removed, the evaluation
stops and would be retried on the next run. This is a safer approach.

Signed-off-by: mprahl <mprahl@users.noreply.github.com>
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openshift-ci bot commented Apr 6, 2023

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mprahl, yiraeChristineKim

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Comment on lines +722 to +724
mergePatch := []byte(`{"metadata": {"finalizers": ["` + pruneObjectFinalizer + `"]}}`)

err := r.Update(context.TODO(), &plc)
err := r.Patch(context.TODO(), &plc, client.RawPatch(types.MergePatchType, mergePatch))
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@mprahl could this accidentally remove any other finalizer on the resource? I was expecting a JSON patch like [{"op":"add","path":"/metadata/finalizers/-","value":"..."}]

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Good catch. I thought the merge patch would act like strategic merge but I got the two confused. Here is a PR with the fix:
#119

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4 participants