Cluster Connection Issues

Troubleshoot cluster connectivity problems.

Cannot Connect to Cluster

Error: Cannot connect to cluster or connection refused

Diagnose

# Check cluster is running
kind get clusters

# Test kubectl access
kubectl cluster-info

# Check kubeconfig
echo $KUBECONFIG

Solutions

1. Verify cluster exists:

   kind get clusters
   kueue-dev cluster list
   

2. Use correct kubeconfig:

   export KUBECONFIG=~/.kube/config-<cluster-name>
   # or
   kueue-dev --kubeconfig ~/.kube/config-<cluster-name> test run
   

3. Recreate cluster:

   kueue-dev cluster delete --name <name>
   kueue-dev cluster create --name <name>
   

Context Issues

Error: The connection to the server was refused

Solution

# Switch to correct context
kubectl config use-context kind-<cluster-name>

# Or let kueue-dev handle it
kueue-dev deploy operator kind --name <cluster-name> --related-images <file>