2V0-71.23 Question 1
Select 3You are managing a Kubernetes cluster using VMware Tanzu Kubernetes Grid (TKG). The development team has requested to upgrade the cluster to a newer Kubernetes version. Which of the following steps are critical to ensure the upgrade process aligns with Kubernetes lifecycle management best practices?
- A
Verify that the target Kubernetes version is supported by the current TKG version.
- B
Immediately delete all existing workloads in the cluster to prevent compatibility issues during the upgrade.
- C
Backup the etcd database and cluster configuration before starting the upgrade process.
- D
Perform the upgrade directly from the oldest Kubernetes version to the latest version to save time.
- E
Upgrade the cluster control plane to the target Kubernetes version before upgrading worker nodes.
Show answer and explanation
Correct answers: A, C, E
Explanation
Kubernetes lifecycle management involves careful planning and execution during upgrades to minimize risk and downtime. Verifying version compatibility, backing up critical cluster state, and following the proper order of upgrading the control plane first are key steps to ensure a successful upgrade. Skipping steps, such as deleting workloads or jumping directly to the latest version, can lead to service disruptions or failures.
- A. Correct.
This is correct. Ensuring that the target Kubernetes version is supported by your current TKG version is critical to a successful upgrade. Unsupported versions may lead to unexpected errors or failure.
- B. Incorrect.
This is incorrect. Deleting workloads is not a best practice and can lead to data loss or service interruptions. Workloads can remain running during the upgrade process.
- C. Correct.
This is correct. Backing up the etcd database and cluster configuration is a best practice to ensure you can recover the cluster in case of an upgrade failure.
- D. Incorrect.
This is incorrect. Kubernetes upgrades should be performed sequentially between minor versions (e.g., v1.22 to v1.23) to avoid potential compatibility issues. Skipping versions is not recommended.
- E. Correct.
This is correct. The control plane must be upgraded first before worker nodes to maintain cluster stability and compatibility during the process.