Investigate Kubernetes 1.27 support

Proposal

Kubernetes 1.27 was released on April 11. Following our process, we want to evaluate the work needed to add for supporting the 1.27 version during %16.1.

This issue is only about the investigation. We want to deliver the necessary work during %16.2 and %16.3, to have official support starting with the %16.3 release.

Definition of done

As part of the investigation, open the necessary issues for the following steps and refine them with the team:

• Add 1.27 to supported k3s versions in test-utils-k3s/k3s-gitlab-ci (used for CI test jobs). See example MR.
• Bump test-utils/k3s-gitlab-ci version in k8s-agent-qa.
• Bump the KUBECTL and test-utils/k3s-gitlab-ci k3s version in helm-install-image. See example MR.
• Bump the helm-install-image version in the cluster-applications. See example MR.
• Update auto-deploy-image.
  1. Bump k3s-gitlab-ci version in the test matrix. See example MR.
  2. Bump the HELM_INSTALL_IMAGE_VERSION in .gitlab-ci.yml to the helm-install-image version released in the above step. This is used in the Dockerfile.
  3. Bump the auto-deploy image in the GitLab - Auto Deploy template and test Auto Deploy
• Make sure that the applications versions in Cluster Management project template support Kubernetes 1.27.
  • Install all apps in a Kubernetes cluster with the version being tested, and possibly bump the app versions, or do a fix.

References

• https://kubernetes.io/blog/2023/04/11/kubernetes-v1-27-release/
• https://kubernetes.io/blog/2023/03/17/upcoming-changes-in-kubernetes-v1-27/