Unable to connect to the server: dial tcp: lookup cluster.example.com: no such host

Workarounds

1. 90% success Verify kubeconfig points to the correct cluster API endpoint

   kubectl config view --minify
   # Check 'server' URL is correct and reachable:
   curl -k https://<cluster-api-server>:6443/healthz
   # Verify KUBECONFIG env var: echo $KUBECONFIG

   Sources: https://kubernetes.io/docs/concepts/configuration/organize-cluster-access-kubeconfig/

2. 88% success Merge or switch kubeconfig context to point to the correct cluster

   # List available contexts:
   kubectl config get-contexts
   
   # Switch to the correct context:
   kubectl config use-context my-cluster-context
   
   # Merge another kubeconfig file:
   export KUBECONFIG=~/.kube/config:~/new-cluster-config
   kubectl config view --flatten > ~/.kube/config_merged
   mv ~/.kube/config_merged ~/.kube/config

   Sources: https://kubernetes.io/docs/concepts/configuration/organize-cluster-access-kubeconfig/

3. 85% success Renew or refresh expired cluster credentials

   # For EKS:
   aws eks update-kubeconfig --name my-cluster --region us-east-1
   
   # For GKE:
   gcloud container clusters get-credentials my-cluster --zone us-central1-a
   
   # For kubeadm clusters with expired certs:
   kubeadm certs check-expiration
   kubeadm certs renew all
   
   # Restart kube-apiserver after cert renewal.

   Sources: https://kubernetes.io/docs/reference/access-authn-authz/authentication/