2V0-15.25 · Question #22
A VMware Cloud Foundation (VCF) administrator cannot deploy Virtual Machines (VMs) to a compute cluster. The administrator discovers that the vCLS VMs on the problematic cluster are powered off and…
The correct answer is C. Enable retreat mode on the affected cluster. In vSphere 7+ and VCF-managed clusters, the vSphere Cluster Services (vCLS) VMs must remain powered on for DRS, cluster health, and policy enforcement to function. If the vCLS VMs cannot power on, no workloads--including new VMs--can be deployed to the cluster because vSphere…
Question
A VMware Cloud Foundation (VCF) administrator cannot deploy Virtual Machines (VMs) to a compute cluster. The administrator discovers that the vCLS VMs on the problematic cluster are powered off and cannot be powered on. What action can the administrator take to enable deployment of VMs?
Options
- ADelete all resource pools in the affected cluster.
- BDisable HA on the affected cluster.
- CEnable retreat mode on the affected cluster.
- DSet DRS Automation level to fully automated.
How the community answered
(42 responses)- A5% (2)
- B2% (1)
- C83% (35)
- D10% (4)
Explanation
In vSphere 7+ and VCF-managed clusters, the vSphere Cluster Services (vCLS) VMs must remain powered on for DRS, cluster health, and policy enforcement to function. If the vCLS VMs cannot power on, no workloads--including new VMs--can be deployed to the cluster because vSphere considers the cluster unhealthy. A common cause is insufficient resources (CPU/memory), datastore issues, or policy conflicts preventing vCLS VMs from starting. VMware provides Retreat Mode as a troubleshooting mechanism to temporarily disable vCLS, allowing the administrator to deploy VMs and correct underlying issues. Enabling retreat mode: Removes vCLS from the cluster Restores ability to deploy VMs Allows remediation of storage/placement issues Can later be disabled to restore DRS health
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