AKS - couldn't get current server API group list dail tcp lookup 443 timeout

 Well this sounds like you have an issue connecting (obviously) - Goto Azure portal -> Find your AKS cluster and click on the connect button. Then you need to provide 

az aks get-credentials --resource-group my-resource-group --name myaks-cluster


Well sometimes we do forgets to re-authenticate to a new cluster. You can use the following to test connectivity to your cluster - assuming you have access to the kubernetes API


  az aks command invoke \
  --resource-group my-resource-group \
  --name myaks-cluster \
  --command "kubectl get pods -n kube-system"

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