Implement and Configure a Highly-Available Control Plane CKA Practice Questions (Page 2)

Questions 6–10

1. 6application · medium

   You are planning to upgrade the Kubernetes version on a highly-available control plane with three control plane nodes. The cluster uses stacked etcd and a load balancer in front of the API servers. What is the correct procedure to upgrade the control plane without downtime?

   • AUpgrade all three control plane nodes simultaneously to minimize the maintenance window.
   • BUpgrade the etcd cluster first, then upgrade the control plane components on all nodes.
   • CUpgrade one control plane node at a time, waiting for it to become healthy before proceeding to the next.
   • DUpgrade the load balancer first, then upgrade the control plane nodes.
   Reveal Solution Discussion Select an answer first
2. 7expert · hard

   You are troubleshooting a highly-available control plane where the scheduler is not failing over to a standby instance when the primary scheduler fails. You have verified that the scheduler is configured with --leader-elect=true on all instances. What is the most likely cause of the issue?

   • AThe standby scheduler instances are not running.
   • BThe scheduler instances are using different --leader-elect-resource-name values.
   • CThe --leader-elect-lease-duration is set too high.
   • DThe API server is not reachable by the standby scheduler instances.
   Reveal Solution Discussion Select an answer first
4. 8foundation · easy

   Which control plane component is responsible for ensuring that the desired state of the cluster matches the actual state by running control loops?

   • Akube-controller-manager
   • Bkube-apiserver
   • Ckube-scheduler
   • Detcd
   Reveal Solution Discussion Select an answer first
5. 9application · medium

   You have a three-member external etcd cluster. You need to perform a backup of the etcd data. Which command should you use to create a consistent snapshot?

   • Aetcdctl backup /backup/snapshot.db
   • Betcdctl snapshot save /backup/snapshot.db
   • Ckubectl etcd snapshot save /backup/snapshot.db
   • Dcp -r /var/lib/etcd /backup/
   Reveal Solution Discussion Select an answer first
6. 10foundation · easy

   What is the recommended approach to upgrade a highly-available control plane with minimal downtime?

   • AUpgrade all control plane nodes simultaneously
   • BTake down the entire cluster and upgrade all components
   • CUpgrade nodes one at a time, ensuring the cluster remains functional
   • DUpgrade etcd first, then the API server on the same node
   Reveal Solution Discussion Select an answer first