Setting the CPU reservation below 90% will usually succeed. It all depends on the available resources on the ESXi hosts throughout the cluster.
The best way to see what resources are available is to view the "CPU Reservation Details" in vCenter.
- In VC UI click on the cluster --> Monitor --> Under "resource Allocation" click on CPU
- The "available Reservation" value is for the entire cluster. Divide that by number of hosts.
To pull the exact reservation available for any given host you can navigate to the host MOB.
https://esxi1.gsslabs.org/mob/?moid=ha-root-pool&doPath=config.cpuAllocationNOTE: Please substitute actual hostname in the above. Host MOB may be disabled. To enable create and/or set the below value to true:
Config.HostAgent.plugins.solo.enableMob true
HCX uses the below calculation to set reservation:
CPU reservation: 8 * 2000 * 100/100 = 16000
8= number of Logical Processers on ESXi host
2000= Processor Speed in MHZ
100/100 = Reservation value over max reservation (100)
* If reservation set to 95% it would be 95/100
Workaround:
In most cases setting the reservation value to <90% should allow deployment to complete.
OR
Leave reservation set to 0