Description of problem: We've noticed that the ingress VIP could be flapping in some environments where the keepalived check fails due to timeout. We should make the ingress check more resilient to errors and start using `fall` and `raise` to mitigate flapping as we did for the API checks. We're seeing this issue regularly on OpenStack deployments in PSI.
Verified on: 4.9.0-0.nightly-2021-07-30-014522
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory (Moderate: OpenShift Container Platform 4.9.0 bug fix and security update), and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://access.redhat.com/errata/RHSA-2021:3759