Added class in ingressClassName as default if not specified

[anirudhAgniRedhat]

The alert IngressWithoutClassName was introduced to Cluster. whether Ingress objects would exist without an ingressClassName specified. Given that without an ingressClassName specified, it's not clear what the ingress object is supposed to do, it's vital that alerting is taking place and actions are taken to set the ingressClassName properly for each ingress object.

And as the Ingress resources without a spec.ingressClassName are generated by the Cert-Manager.

Pull Request Motivation

We can create an Ingress without having IngressClassName specified. I am getting alerts messages that ingress Exists without IngressClassName Specified.

I propose that we can add default ingressClassName to issuer if ingressClassName is not specified.

Expected behaviour:
It should Set default ingressClassName if className is not specified.

Kind

bug : #6897

Release Note

NONE

[cert-manager-prow]

Hi @anirudhAgniRedhat. Thanks for your PR.

I'm waiting for a cert-manager member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[cert-manager-prow]

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[inteon]

/ok-to-test

[maelvls]

Hey, thanks for opening a PR! I'll share my thoughts on #6897, and I'll come back here once we agree on the issue.

[inteon]

/test pull-cert-manager-master-make-verify