net-istio should guard the prober against resync flooding

[mattmoor]

net-istio should guard the prober against resync flooding

[arturenault]

/assign

[JRBANCEL]

have the main Reconcile loop rely on the recorded readiness of the kingress to elide IsReady checks.
Basically, calling IsReady only if KIngress.Status is not Ready?
That should work, since for KIngress to be Ready (and ObservedGeneration == Generation) probing must have succeeded at some point int the past.

/assign

[mattmoor]

Yeah exactly. see: knative-extensions/net-contour#231

[JRBANCEL]

/assign @arturenault

[knative-prow-robot]

@JRBANCEL: GitHub didn't allow me to assign the following users: arturenault.

Note that only knative-sandbox members, repo collaborators and people who have commented on this issue/PR can be assigned. Additionally, issues/PRs can only have 10 assignees at the same time.
For more information please see the contributor guide

In response to this:

/assign @arturenault

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.