This folder contains information and tools for debugging the Kubernetes controller manager.

1. Check Controller Manager Logs:

   • Use kubectl logs -n kube-system <controller-manager-pod-name> to view logs.
   • Look for errors related to resource reconciliation or controller loops.

2. Verify Controller Health:

   • Run kubectl get componentstatuses to check the health of the controller manager.

3. Inspect Events:

   • Use kubectl get events --all-namespaces to identify issues managed by controllers.

4. Inspect Configuration:

   • Review the controller manager configuration file (e.g., /etc/kubernetes/manifests/kube-controller-manager.yaml).

• kubectl
• Log analysis tools like stern or k9s.

Problem: PersistentVolumeClaims (PVCs) are not being bound.

Solution:

1. Check controller manager logs: kubectl logs -n kube-system <controller-manager-pod-name>.
2. Inspect PVC events: kubectl describe pvc <pvc-name>.
3. Verify storage class configuration: kubectl get storageclass.