testing fixture should support types.ApplyPatchType

[hypergig]

Currently all the fake clients leverage these fixtures:

https://github.com/kubernetes/client-go/blob/master/testing/fixture.go#L151-L184

Which are super great and helpful, but there is a new patch type in town and these fixtures don't know about it:

 types.ApplyPatchType

or

application/apply-patch+yaml

This leads to tests that perform server side applies to fail with PatchType is not supported. Support for SSA should be added to this fixture.

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/lifecycle stale

[mkumatag]

/remove-lifecycle stale

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/lifecycle stale

[XinruZhang]

/remove-lifecycle stale

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/lifecycle stale

[mkumatag]

/remove-lifecycle stale

[Karthik-K-N]

I would like to add types.ApplyPatchType into fixtures, Where can i find more info on types.ApplyPatchType so that i can update the file accordingly

[grishy]

I think it's same?
#970

Also: kubernetes/kubernetes#104052

[Karthik-K-N]

Yeah, It will fix #970 as well

[apelisse]

So if I'm looking at the test code, I notice that we need to implement merging (i.e. decoding the patch and applying the patch, since that's what the other patch methods do) for the Apply patchtype.

The logic to do that in the apiserver is set-up here: https://github.com/kubernetes/kubernetes/blob/master/staging/src/k8s.io/apiserver/pkg/endpoints/handlers/patch.go#L470-L500

Mainly this code (decoding and applying):

	patchObj := &unstructured.Unstructured{Object: map[string]interface{}{}}
	if err := yaml.Unmarshal(p.patch, &patchObj.Object); err != nil {
		return nil, errors.NewBadRequest(fmt.Sprintf("error decoding YAML: %v", err))
	}

	obj, err := p.fieldManager.Apply(obj, patchObj, p.options.FieldManager, force)
	if err != nil {
		return obj, err
	}

The decoding is fairly straightforward, but the applying leads to a few questions:

1. how do you get the fieldManager? I suspect it could live in the ObjectTracker
   a. You'll need the openapi schema to create the fieldmanager, how do you get that openapi? Not sure yet.
   b. the fieldManager object has a lot of fields for conversion, not sure how available these will be.
2. Where are the options like FieldManager and Force come from? They are significant enough that you can't really skip these, I don't have an answer to this.

[Karthik-K-N]

Thanks @apelisse for your inputs, Instead of handling the patch here in client-go, How about creating a util package as like stratergicmergepatch and utilizing it over here, Is this sound good.

[apelisse]

You can try, I'm not entirely sure what the code will look like right now, so I'm not entirely sure where it should live yet.

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/lifecycle stale

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/lifecycle rotten

[stevekuznetsov]

@apelisse

Where are the options like FieldManager and Force come from? They are significant enough that you can't really skip these, I don't have an answer to this.

These can be taken from metav1.PatchOptions{} as normal in the client's patch call, so at least that's the easy part.

[stevekuznetsov]

A quick read of the constructors here shows that OpenAPI + a scheme should be sufficient-ish to get this working, I think.

[apelisse]

@justinsb is working on doing something somewhat similiar in kubernetes-sigs/kubebuilder-declarative-pattern#270. I think we should do something that can be re-used throughout.

We would also probably need to revive/finish kubernetes/kubernetes#87872 so that getting the openapi into the right format would be easier.

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/close not-planned

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@k8s-triage-robot: Closing this issue, marking it as "Not Planned".

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[apelisse]

/reopen

[k8s-ci-robot]

@apelisse: Reopened this issue.

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/reopen

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/close not-planned

[k8s-ci-robot]

@k8s-triage-robot: Closing this issue, marking it as "Not Planned".

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[sbueringer]

/reopen
/remove-lifecycle rotten

(I assume this was the intention)

[k8s-ci-robot]

@sbueringer: Reopened this issue.

In response to this:

/reopen
/remove-lifecycle rotten

(I assume this was the intention)

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/lifecycle stale

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/lifecycle rotten

[pohly]

/cc
/remove-lifecycle rotten

Shouldn't this issue be over in k/k? That's where the code gets developed.

[jordan-da]

/cc /remove-lifecycle rotten

Shouldn't this issue be over in k/k? That's where the code gets developed.

🤷 sure?

should this repo have issues enabled then because it's just a gen stage?

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/close not-planned

[k8s-ci-robot]

@k8s-triage-robot: Closing this issue, marking it as "Not Planned".

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