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extend documentation on server-side apply #14300

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21 changes: 21 additions & 0 deletions content/en/docs/reference/using-api/api-concepts.md
Original file line number Diff line number Diff line change
Expand Up @@ -430,3 +430,24 @@ Another difference is that an applier using Client Side Apply is unable to chang
### Custom Resources

Server Side Apply currently treats all custom resources as unstructured data. All keys are treated the same as struct fields, and all lists are considered atomic. In the future, it will use the validation field in Custom Resource Definitions to allow Custom Resource authors to define how to how to merge their own objects.

### Clearing ManagedFields

It is possible to strip all managedFields from an object by overwriting them using `MergePatch` or `JSONPatch`.
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What about smp, what about updates?

This can be done via a `PATCH` request with the respective content type on the targeted object. Two examples are:

```json
PATCH /api/v1/namespaces/default/configmaps/example-cm
Content-Type: application/merge-patch+json
Accept: application/json
Data: {"metadata":{"managedFields": [{}]}}
```

```json
PATCH /api/v1/namespaces/default/configmaps/example-cm
Content-Type: application/json-patch+json
Accept: application/json
Data: [{"op": "replace", "path": "/metadata/managedFields", "value": [{}]}]
```

This will overwrite the managedFields with a list containing a single empty entry that then results in the managedFields being stripped entirely from the object.