Wait for the webhook service to be listening before advertising the Jobset replica as ready.

[mbobrovskyi]

What would you like to be added:
As mentioned on the title, wait for the webhook service to be listening before advertising the Jobset replica as ready. Like on the kueue here.

Why is this needed:
It causes flakes in kueue https://prow.k8s.io/view/gs/kubernetes-jenkins/pr-logs/pull/kubernetes-sigs_kueue/2408/pull-kueue-test-e2e-main-1-28/1802723422271180800. To fix it we need to wait for jobset operator ready and to be sure that webhooks runs success.

[mbobrovskyi]

cc @mimowo @alculquicondor

[mimowo]

+1 in Kueue we use readiness probes to delay marking the deployment as available until the webhook service is ready.

This allows users to wait for the webhooks service by waiting for availability of the deployment.

We use this mechanism in kueue e2e tests here, but it can also be checked conveniently by users by kubectl wait --for=condition=available .

[kannon92]

Sounds very sane. @mbobrovskyi would you want to contribute a patch?

[mbobrovskyi]

Yes.

/assign

[danielvegamyhre]

Makes sense, thanks for working on this @mbobrovskyi