CLI prints deprecation warning about extensions/v1beta1 when doing keptn auth

[christian-kreuzberger-dtx]

With Keptn 0.8.4, when executing keptn auth without parameters, the following deprecation warning is shown:

$ keptn auth
W0622 09:12:38.907621  114793 warnings.go:70] extensions/v1beta1 Ingress is deprecated in v1.14+, unavailable in v1.22+; use networking.k8s.io/v1 Ingress

This is caused by the function GetKeptnEndpointFromIngress which is implemented in kubernetes-utils:
https://github.com/keptn/kubernetes-utils/blob/334fb680480c179fdee3503dc6297ce067457945/pkg/kubernetes-utils.go#L345-L357

Definition of Done

• The warning is no longer shown when executing keptn auth without parameters
• kubernetes-utils function GetKeptnEndpointFromIngress has been adapted to also work with networking.k8s.io/v1
• Get rid of all beta APIs

[ritwizsinha]

Hello, I would like to work in it, I have been playing around with Keptn for some days and would like to take this up to have my first entry point in the project

[thisthat]

Hi @ritwizsinha! Thank you for helping us 😄
I will assign the issue to you then!

[ritwizsinha]

So, what I understand from looking at some documentation and looking at this kubernetes-client package is that I have to use the Networking V1 type of client which allows us to interact with features given by networking.k8s.io group to avoid a warning

The task list above says that

kubernetes-utils function GetKeptnEndpointFromIngress has been adapted to also work with networking.k8s.io/v1

The question I have is, do I have to replace the v1Beta1 client with the networkingv1 client or do I have to use the networkingv1 client whenever the v1beta1 client shows a warning.

[nvzard]

@thisthat can I pick this up?

[thisthat]

Hey @nvzard sure! Thank you a lot for helping us out 😊

[nvzard]

Can someone please review this? keptn/kubernetes-utils#163

I guess I'll also need to upgrade the version of kubernetes-utils package being used by keptn cli.
Shall I do that after this PR is merged and a kubernetes-util release is made?

[nvzard]

keptn/go-utils#492

Made the PR for the correct repo. Can someone please review it?