Add readiness and liveness probes in controller

[lionelvillard]

Partial fix for knative/pkg#1048

Having both readiness and liveness probes is good kube practice.

For now the implementation relies on a simple http server we can improve later as needed.

Proposed Changes

• 🎁 Add readiness and liveness probes in Knative Eventing controller

Pre-review Checklist

• [x ] At least 80% unit test coverage
• [x ] E2E tests for any new behavior
• [x ] Docs PR for any user-facing impact
• [ x] Spec PR for any new API feature
• [x ] Conformance test for any change to the spec

Release Note

 :gift: Add readiness and liveness probes in Knative Eventing controller

Docs

[knative-prow]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: lionelvillard

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[cr22rc]

/LGTM

[lionelvillard]

/test upgrade-tests

[lionelvillard]

/test upgrade-tests

[lionelvillard]

/cherry-pick release-1.6

[lionelvillard]

/cherry-pick release-1.5

[knative-prow-robot]

@lionelvillard: new pull request created: #6567

In response to this:

/cherry-pick release-1.6

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[knative-prow-robot]

@lionelvillard: new pull request created: #6568

In response to this:

/cherry-pick release-1.5

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[matzew]

@lionelvillard what's against also bringing this to 1.7 ? 😅

[lionelvillard]

/cherry-pick release-1.7

thanks @matzew !

[knative-prow-robot]

@lionelvillard: new pull request created: #6570

In response to this:

/cherry-pick release-1.7

thanks @matzew !

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.