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Troubleshooting

The binary exits immediately with "--app flag is required"

coder-k8s requires an explicit application mode.

For the controller:

GOFLAGS=-mod=vendor go run . --app=controller

For the aggregated API server:

GOFLAGS=-mod=vendor go run . --app=aggregated-apiserver

"no matches for kind" when applying a CoderControlPlane

This usually means the CRD isn't installed in the cluster.

make manifests
kubectl apply -f config/crd/bases/

The controller is running, but reconciliation doesn't happen

  • Check controller logs:

    kubectl logs -n coder-system deploy/coder-k8s-controller

  • Confirm RBAC is applied:

    kubectl get clusterrole coder-k8s-controller
kubectl get clusterrolebinding coder-k8s-controller

Aggregated codertemplates / coderworkspaces reads are empty or inconsistent

If kubectl get codertemplates.aggregation.coder.com or kubectl get coderworkspaces.aggregation.coder.com returns empty data unexpectedly, check for CRD/APIService conflicts.

When both of these exist at once:

  • APIService v1alpha1.aggregation.coder.com
  • CRDs codertemplates.aggregation.coder.com and/or coderworkspaces.aggregation.coder.com

Kubernetes may not route reads the way you expect for demos.

kubectl get apiservice v1alpha1.aggregation.coder.com
kubectl get crd codertemplates.aggregation.coder.com coderworkspaces.aggregation.coder.com

For APIService-based demos, remove the conflicting aggregation CRDs:

kubectl delete crd codertemplates.aggregation.coder.com coderworkspaces.aggregation.coder.com
kubectl apply -f deploy/apiserver-apiservice.yaml
kubectl wait --for=condition=Available apiservice/v1alpha1.aggregation.coder.com --timeout=120s

Aggregated APIService shows False / Unavailable

  • Ensure the deployment and service exist:

    kubectl get deploy,svc -n coder-system | grep coder-k8s-apiserver

  • Inspect APIService status:

    kubectl describe apiservice v1alpha1.aggregation.coder.com

  • Check the aggregated API server logs:

    kubectl logs -n coder-system deploy/coder-k8s-apiserver