Azure Kubernetes Service (PROD)

managed-prod-cc-00-aks

Upgraded was performed against the Azure Kubernetes Service (PROD) from v1.21.9 to v1.22.11 to ensure are using a supported release of AKS.

Check for the appropriate Kubernetes release:

az aks get-versions -l canadacentral -o table

Note: Ensure only updating to a +1 major release

Upgrade the control plane:

az aks upgrade -g managed-prod-cc-00-aks -n <clustername>-aks --control-plane-only -k 1.22.11

Note: Ensure the control plane is fully functional before continuing by checking kubectl version.

Upgrade the node pools:

az aks nodepool upgrade -g managed-prod-cc-00-aks --cluster-name <clustername>-aks -n nodepool1 -k 1.22.11 --max-surge 1

The way the AKS upgrade works is it brings in the number of surge vms, drains the old vms, and reimages them.

Note: When the cluster size is small best to set max surge to only do one virtual machine at a time.