Cluster-api: Implement Scale Subresource for MachineSet

[chaosaffe]

With the move back to CRD's we haven't added support to MachineSet for using the scale command with kubectl. Adding support for the scale subresource would allow for use of the scale command.

/good-first-issue

[k8s-ci-robot]

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In response to this:

With the move back to CRD's we haven't added support to MachineSet for using the scale command with kubectl. Adding support for the scale subresource would allow for use of the scale command.

/good-first-issue

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[k8s-ci-robot]

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/assign @stpabhi

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[stpabhi]

I would like to work on it

[flaper87]

@stpabhi sounds great, go for it! :cake:

[detiber]

The good news is that the annotation to generate the scale subresource is already present in the version of sigs.k8s.io/controller-tools that we have vendored :)

[roberthbailey]

Fixed by https://github.com/kubernetes-sigs/cluster-api/pull/582