CASMPET-7248: Use apiVersion autoscaling/v2 for HorizontalPodAutoscaler

[studenym-hpe]

Summary and Scope

In preparation for upgrading Kubernetes to 1.32 in CSM 1.7, the HorizontalPodAutoscaler apiVersion has been changed to autoscaling/v2 (which has been available since k8s 1.23) since autoscaling/v2betav2 will no longer be available as of k8s 1.26.

The if-statement to select autoscaling/v2betav2 or autoscaling/v2 in the kubernetes/cray-istio/templates/autoscale.yaml
template does not work using helm on a system per CASMPET-7248.

Issues and Related PRs

• Resolves CASMPET-7248

Testing

Tested on beau with helm upgrade. You can see the warnings about autoscaling/v2beta2 on rollback.

pit:~/studenym # helm upgrade -n istio-system cray-istio cray-istio-3.0.1-20250116183846+cbf8356.tgz
Release "cray-istio" has been upgraded. Happy Helming!
NAME: cray-istio
LAST DEPLOYED: Thu Jan 16 19:25:06 2025
NAMESPACE: istio-system
STATUS: deployed
REVISION: 2
TEST SUITE: None
NOTES:
A Cray-specific Istio chart
pit:~/studenym # helm list -n istio-system
NAME               	NAMESPACE   	REVISION	UPDATED                                	STATUS  	CHART                                  	APP VERSION
cray-istio         	istio-system	2       	2025-01-16 19:25:06.489437476 +0000 UTC	deployed	cray-istio-3.0.1-20250116183846+cbf8356	1.19.10
cray-istio-deploy  	istio-system	1       	2025-01-13 14:30:55.632653297 +0000 UTC	deployed	cray-istio-deploy-2.0.1                	1.19.10
cray-istio-operator	istio-system	1       	2025-01-13 14:30:53.556527841 +0000 UTC	deployed	cray-istio-operator-2.0.0              	1.19.10
pit:~/studenym # helm history -n istio-system cray-istio
REVISION	UPDATED                 	STATUS    	CHART                                  	APP VERSION	DESCRIPTION
1       	Mon Jan 13 14:33:26 2025	superseded	cray-istio-3.0.0                       	1.19.10    	Install complete
2       	Thu Jan 16 19:25:06 2025	deployed  	cray-istio-3.0.1-20250116183846+cbf8356	1.19.10    	Upgrade complete
pit:~/studenym # helm rollback -n istio-system cray-istio 1
W0116 19:41:37.899734    4522 warnings.go:70] autoscaling/v2beta2 HorizontalPodAutoscaler is deprecated in v1.23+, unavailable in v1.26+; use autoscaling/v2 HorizontalPodAutoscaler
W0116 19:41:37.922915    4522 warnings.go:70] autoscaling/v2beta2 HorizontalPodAutoscaler is deprecated in v1.23+, unavailable in v1.26+; use autoscaling/v2 HorizontalPodAutoscaler
W0116 19:41:37.961895    4522 warnings.go:70] autoscaling/v2beta2 HorizontalPodAutoscaler is deprecated in v1.23+, unavailable in v1.26+; use autoscaling/v2 HorizontalPodAutoscaler
W0116 19:41:37.974514    4522 warnings.go:70] autoscaling/v2beta2 HorizontalPodAutoscaler is deprecated in v1.23+, unavailable in v1.26+; use autoscaling/v2 HorizontalPodAutoscaler
W0116 19:41:37.986042    4522 warnings.go:70] autoscaling/v2beta2 HorizontalPodAutoscaler is deprecated in v1.23+, unavailable in v1.26+; use autoscaling/v2 HorizontalPodAutoscaler
W0116 19:41:38.030097    4522 warnings.go:70] autoscaling/v2beta2 HorizontalPodAutoscaler is deprecated in v1.23+, unavailable in v1.26+; use autoscaling/v2 HorizontalPodAutoscaler
W0116 19:41:38.051505    4522 warnings.go:70] autoscaling/v2beta2 HorizontalPodAutoscaler is deprecated in v1.23+, unavailable in v1.26+; use autoscaling/v2 HorizontalPodAutoscaler
W0116 19:41:38.075605    4522 warnings.go:70] autoscaling/v2beta2 HorizontalPodAutoscaler is deprecated in v1.23+, unavailable in v1.26+; use autoscaling/v2 HorizontalPodAutoscaler
W0116 19:41:38.095884    4522 warnings.go:70] autoscaling/v2beta2 HorizontalPodAutoscaler is deprecated in v1.23+, unavailable in v1.26+; use autoscaling/v2 HorizontalPodAutoscaler
W0116 19:41:38.107726    4522 warnings.go:70] autoscaling/v2beta2 HorizontalPodAutoscaler is deprecated in v1.23+, unavailable in v1.26+; use autoscaling/v2 HorizontalPodAutoscaler
W0116 19:41:38.114586    4522 warnings.go:70] autoscaling/v2beta2 HorizontalPodAutoscaler is deprecated in v1.23+, unavailable in v1.26+; use autoscaling/v2 HorizontalPodAutoscaler
W0116 19:41:38.120408    4522 warnings.go:70] autoscaling/v2beta2 HorizontalPodAutoscaler is deprecated in v1.23+, unavailable in v1.26+; use autoscaling/v2 HorizontalPodAutoscaler
Rollback was a success! Happy Helming!
pit:~/studenym #

Pull Request Checklist

• Version number(s) incremented, if applicable
• Copyrights updated
• License file intact
• Target branch correct
• CHANGELOG.md updated
• Testing is appropriate and complete, if applicable
• HPC Product Announcement prepared, if applicable

[davidfluck-hpe]

Looks good!