HA Issue - insufficient resources to satisfy HA failover level on cluster

[azlans27]

I have classic issue about HA, that is "insufficient resources to satisfy HA failover level on cluster". Actually i already read some threads discussing about it, but the solution there doesn't fix my problem.

Here is my vmware cluster environment:

* Warning in the 2nd host is only because of no management network redundancy.

All host using ESXi 6.0.0

Here is my Guest VM environment:

All those three guest VM's i put on host 176, while no vm on host 175. To test HA feature, i put host 176 on 'Maintenance Mode'. This action normally will move all vm's to other host, in this case host 175.

But, in my case, i failed to put host 176 on 'Maintenance Mode' with alert 'insufficient resources to satisfy HA failover level on cluster'.

Fyi, I enabled admission control with percentage, 50% exactly. If calculate, host 175 will cover all 3 vm's with this setting.

I already did these things but not solve my problem:

     - Turning off HA, then turning on again

     - Reconfigure for vSphere HA for each host

     - Restart Vmware VcenterServer Service on Vcenter Server

Anyone to share knowledge to fix this case?

best regards,

Azlan

[rcporto · Accepted solution]

Unless I'm missing something you will need to disable Admission Control to be able to put one of hosts in Maintenance Mode. Take in mind that if you put one host in maintenance mode with admission control enabled, you will really not able to satisfy the HA failover, since the host in maintenance mode will not be available to run virtual machines in case of the active host fails.

[azlans27]

Thank Mr Richardson, now I get the point.