vSphere DRS functionality was impacted due to unhealthy state vSphere Cluster Services caused by the unavailability of vSphere Cluster Service VMs. vSphere Cluster Service VMs are required to maintain the health of vSphere DRS.

I noticed that cluster having this issue which we created recently. I performed troubleshooting and followed the below steps to resolve the issue.

Restarted the vCenter server (VCSA) but not fixed the issue. Tried redeploy the vCLS VM's by using below setting on vCenter side.

To redeploy the vCLS VM's. Need to disable and enable the settings.

Go to Configure option on vCenter. Select advance settings and add new value on settings.

config.vcls.clusters.domain-c596100.enabled and make sure it should be " True".

TRUE: it will deploy the vCLS VM's.

False: it will remove the VCLS VM's.

To collect domain ID, when we selected the any cluster , it will display the one domain ID in main page URL.

Note: each cluster having own domain ID.

If still not resolve the issue, we have to follow the below commands run on vCenter.

# mkdir /certificate

# /usr/lib/vmware-vmafd/bin/vecs-cli entry getcert --store vpxd-extension --alias vpxd-extension --output /certificate/vpxd-extension.crt

# /usr/lib/vmware-vmafd/bin/vecs-cli entry getkey --store vpxd-extension --alias vpxd-extension --output /certificate/vpxd-extension.key

Run this command to update the extension's certificate with vCenter Server.

# python /usr/lib/vmware-vpx/scripts/updateExtensionCertInVC.py -e com.vmware.vim.eam -c /certificate/vpxd-extension.crt -k /certificate/vpxd-extension.key -s localhost -u Administrator@domain.local

Restart EAM and start the rest of the services with these commands:

service-control --stop vmware-eam

service-control --start --all

Then issue has been fixed and followed below article which was helped.

https://kb.vmware.com/s/article/80588?lang=en_US