This error occurs when Kubernetes cannot find a specified key, typically in ConfigMaps, Secrets, or certificate/key operations, preventing pod configuration or security setup.
The "Key not found" error indicates that a requested key doesn't exist in the resource where expected.
kubectl get configmap <name> -o jsonpath='{.data}' | jq keys
kubectl get pod <name> -o yaml | grep -A10 configMap
kubectl describe pod <name>
kubectl patch configmap app-config -p '{"data":{"key":"value"}}'
Keys are case-sensitive. ConfigMap/Secret keys checked at pod creation time.
kubectl delete pod <name>