Kubectl patch: Difference between revisions
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=Overview= | =Overview= | ||
<code>kubectl patch</code> supports [[Kubernetes Strategic Merge Patch|strategic merge patch]]. | <code>kubectl patch</code> supports the following modes: [[Kubernetes Strategic Merge Patch|strategic merge patch]], JSON merge patch and JSON patch. | ||
=Caveats= | =Caveats= | ||
⚠️There are situations when the patch apparently succeeds, the <code>kubectl patch</code> command exits with 0 and if the resource is queried immediately, the patch seems to be applied, but when the resource is queried a while later (15 secs), it becomes apparent that the "patch" did not take. This happened while trying to unbind a PV from the PVC while the PVC is still active. | ⚠️There are situations when the patch apparently succeeds, the <code>kubectl patch</code> command exits with 0 and if the resource is queried immediately, the patch seems to be applied, but when the resource is queried a while later (15 secs), it becomes apparent that the "patch" did not take. This happened while trying to unbind a PV from the PVC while the PVC is still active. | ||
Revision as of 17:28, 29 July 2021
External
Internal
Overview
kubectl patch supports the following modes: strategic merge patch, JSON merge patch and JSON patch.
Caveats
⚠️There are situations when the patch apparently succeeds, the kubectl patch command exits with 0 and if the resource is queried immediately, the patch seems to be applied, but when the resource is queried a while later (15 secs), it becomes apparent that the "patch" did not take. This happened while trying to unbind a PV from the PVC while the PVC is still active.
Usage Examples
Delete a Field
Unbind a PVC from a PV by deleting the PV's claimRef:
kubectl patch pv my-pv --type=json -p='[{"op": "remove", "path": "/spec/claimRef"}]'