Troubleshoot Cluster Components CKA Practice Questions (Page 5)

Questions 21–23

1. 21foundation · easy

   A Service is not reachable from within the cluster. Which component's logs would you inspect to see if it is updating iptables rules correctly?

   • ACNI plugin
   • Bkube-scheduler
   • Ckube-proxy
   • Dkubelet
   Reveal Solution Discussion Select an answer first
2. 22expert · hard

   A cluster has 3 control plane nodes and 5 worker nodes. Users report that `kubectl get pods` intermittently fails with 'etcdserver: request timed out'. `kubectl get nodes` shows all nodes are Ready. Which component is most likely the root cause?

   • AThe kube-controller-manager is failing to sync resources.
   • BThe kube-apiserver is overloaded and dropping requests.
   • CThe kubelet on worker nodes is not reporting status.
   • DThe etcd cluster is experiencing performance issues or network latency between etcd members.
   Reveal Solution Discussion Select an answer first
3. 23application · medium

   The kube-scheduler on the control plane node is unresponsive. You need to restart it with minimal disruption to running workloads. What is the safest approach?

   • AMove the static pod manifest `/etc/kubernetes/manifests/kube-scheduler.yaml` to a backup directory, then move it back after a few seconds.
   • BDelete the scheduler pod with `kubectl delete pod -n kube-system kube-scheduler-control-plane`.
   • CRun `kubectl rollout restart daemonset/kube-scheduler -n kube-system`.
   • DRun `systemctl restart kube-scheduler` on the control plane node.
   Reveal Solution Discussion Select an answer first