prometheus-federator k8s 1.26 chart support

[gunamata]

This issue is to implement the chart changes & perform the testing required to upgrade to k8s 1.26. Please perform below steps.

• [ ] Check whether the chart has any references to the below deprecated features of k8s 1.26. You can find information about deprecated APIs here on Kubernetes Deprecation guide.

• flowcontrol.apiserver.k8s.io/v1beta1 API version of FlowSchema

• flowcontrol.apiserver.k8s.io/v1beta1 API version of PriorityLevelConfiguration

• autoscaling/v2beta2 API version of HorizontalPodAutoscaler

• [ ] Update kube-version annotation in Chart.yaml. catalog.cattle.io/kube-version: '>= 1.23.0-0 < 1.27.0-0' Note: If this is an upstream chart and if the upstream chart doesn't support k8s 1.26 then do not update the kube-version annotation

• [ ] Perform below tests

• Fresh install/uninstall/upgrade/downgrade of the charts on K8s 1.26 provisioned on Rancher. Test the chart functionality

• Provision rancher on k8s 1.25 or lesser

• Install chart on this cluster

• Upgrade this cluster in rancher to k8s 1.26

• Make sure the existing chart and the app is functional after cluster upgrade

Please note that the k8s 1.26 upgrade is targeted for the 2023-Q2-v2.7x. Please complete this task by 05/19/2023.

[gunamata]

@geethub97 , Any update on this task please?

[AndrewHoffmanQA]

testing complete- passed

tested on a downstream cluster

• rancher image 2.7.5-rc4
• monitoring version
• prom fed version

I stood a downstream cluster using the UI and applied 1.24.13 to the cluster.

• installed monitoring and prom federator.
• executed p0 prom federator test suite
• upgraded the downstream cluster to 1.26.4
• executed p0 prom federator test suite

system behaved as expected. moving ticket to closed