To temporary mitigate the ImagePullBackOff I scaled up a new functional node (DNS wise) and used this command to reconcile the AKS cluster:
az resource update --resource-group <RESOURCE_GROUP> --name <CLUSTER_NAME> --namespace Microsoft.ContainerService --resource-type ManagedClusters
This recovered CoreDNS in the kube-system namespace, which fixed the ImagePullBackOff
To temporary mitigate the ImagePullBackOff I scaled up a new functional node (DNS wise) and used this command to reconcile the AKS cluster: ContainerServic e --resource-type ManagedClusters
az resource update --resource-group <RESOURCE_GROUP> --name <CLUSTER_NAME> --namespace Microsoft.
This recovered CoreDNS in the kube-system namespace, which fixed the ImagePullBackOff