3 vCLS Virtual Machines may be created in vSphere cluster with 2 ESXi hosts, when vCenter version is prior to 7.0 U3 (18700403)
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3 vCLS Virtual Machines may be created in vSphere cluster with 2 ESXi hosts, when vCenter version is prior to 7.0 U3 (18700403)

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Article ID: 318565

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Updated On:

Products

VMware vCenter Server

Issue/Introduction

Symptoms:
  • 3 vCLS Virtual Machines are created in vSphere cluster with 2 ESXi hosts, where the number of vCLS Virtual Machines should be "2".

* vSphere Cluster Services
https://docs.vmware.com/en/VMware-vSphere/7.0/com.vmware.vsphere.vcenterhost.doc/GUID-96BD6016-4BE7-4B1C-8269-568D1555B08C.html

Environment

VMware vCenter Server 7.0.1
VMware vCenter Server 7.0.2

Cause

In some cases (e.g. ESXi host disconnect/reconnect), vpxd may reserve an additional slot for vCLS Virtual Machine under race condition. This leads to 2 slots (2 vCLS Virtual Machines) for 1 host, which is expected to be 1 slot for 1 host.

Resolution

This issue has been resolved in vCenter 7.0 U3 (18700403).

Workaround:
To workaround the issue, please follow the below mentioned steps:
  1. Put the cluster in Retreat Mode.
* vSphere Cluster Services (vCLS) in vSphere 7.0 Update 1 (80472)
https://kb.vmware.com/s/article/80472
  1. Restart vpxd service.
service-control --restart vmware-vpxd
  1. Remove the Retreat Mode.


Additional Information

Impact/Risks:
No functional impact, except the unnecessarily deployed vCLS Virtual Machine consumes very small amount of CPU, memory, disk resource. DRS works as expected.

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