2V0-21.23 Question 363
Single answerAn administrator is managing a vSphere cluster with vSphere Cluster Services (vCLS) enabled. Due to an upcoming maintenance activity, the administrator needs to disable the vCLS agent VMs temporarily on all hosts in the cluster. In which scenario would enabling vCLS retreat mode be an appropriate solution?
- A
When the cluster uses vSphere DRS and the administrator wants to maintain load balancing during maintenance.
- B
When the administrator needs to temporarily disable vCLS agent VMs to perform host maintenance without affecting cluster services.
- C
When the administrator is migrating workloads to another cluster and wants to permanently disable vCLS in the current cluster.
- D
When the cluster is under heavy workload, and the administrator wants to prioritize virtual machine resource allocation over vCLS agent VMs.
Show answer and explanation
Correct answer: B
Explanation
vCLS retreat mode is a feature that temporarily disables vCLS agent VMs on all hosts in a cluster. This mode is typically used in scenarios where maintenance activities require the removal of vCLS agent VMs temporarily, without permanently disabling the service. Selecting retreat mode ensures that vCLS agent VMs are stopped, but it also disables cluster services like HA and DRS during this time.
- A. Incorrect.
This is incorrect because vCLS retreat mode temporarily disables vCLS agent VMs, which will also disable DRS functionality. Retreat mode is not suitable if load balancing is required.
- B. Correct.
This is correct as vCLS retreat mode is specifically designed for temporary use cases where vCLS agent VMs need to be disabled, such as during host maintenance.
- C. Incorrect.
This is incorrect because vCLS retreat mode is not intended for permanent disablement of vCLS. To permanently disable vCLS, other configurations must be applied.
- D. Incorrect.
This is incorrect because vCLS retreat mode is not designed to prioritize resources in a cluster. It is used for temporary scenarios like maintenance.