Add support for ControllerExpectations

[alenkacz]

There are certain use cases when controllerexpectations https://github.com/kubernetes/kubernetes/blob/master/pkg/controller/controller_utils.go#L142 makes sense for controller logic (even though I agree they could be misused).

To hook this in properly into controller it would need to be part of the processNextItem so it makes sense from my point of view to be integrated into the runtime.

WDYT?

[alenkacz]

@DirectXMan12 any opinion on this?

[DirectXMan12]

Having helpers for expectations has vaguely been on the todo list. If we're going to integrate into the runtime directly, I'd like to see a rough design sketch or prototype or something before committing to a design (whatever is easiest for you)

[DirectXMan12]

/kind feature
/priority backlog

[fejta-bot]

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[alenkacz]

/remove-lifecycle stale

/assign

[vincepri]

/kind design

[fejta-bot]

Issues go stale after 90d of inactivity.
Mark the issue as fresh with /remove-lifecycle stale.
Stale issues rot after an additional 30d of inactivity and eventually close.

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Send feedback to sig-testing, kubernetes/test-infra and/or fejta.
/lifecycle stale