Generate Kubebuilder project for ExecutionHook CRDs and controller

[prydonius]

This PR generates a new Kubebuilder v2 project for the ExecutionHook CRDs and controller.

• adds the ExecutionHook API
• scaffolds out a controller for the ExecutionHook

The HookAction API needs to be added and the controller logic needs to be implemented as per the KEP (https://github.com/kubernetes/enhancements/blob/master/keps/sig-storage/20190120-execution-hook-design.md#proposal).

Signed-off-by: Adnan Abdulhussein aadnan@vmware.com

cc @xing-yang @skriss @nrb @carlisia @ashish-amarnath

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[xing-yang]

Awesome! Now that @prydonius has submitted this PR, I'll close my POC PR #2.

[ashish-amarnath]

Can we make this an ObjectReference to the the HookAction?

[prydonius]

I think this is not an ObjectReference because we want to fix the namespace and kind here, but @xing-yang might have a better idea.

[xing-yang]

Yes. The application snapshot controller is supposed to create this ExecutionHook object dynamically and copy HookActionName to this spec.

[ashish-amarnath]

@prydonius and I spoke offline and I'll be taking this PR forward.
Thanks for the clean hand-off, @prydonius!

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[ashish-amarnath]

I am also ok w/ getting this merged and working on top of that, preserving attribution.

[ashish-amarnath]

Closing this in favor of #4

[ashish-amarnath]

/close

[k8s-ci-robot]

@ashish-amarnath: Closed this PR.

In response to this:

/close

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