Hi, I have been trying to figure out why there is insufficient resources to power just one small VM in my vSphere cluster.
2 X ESXi 5.1 hosts
Each host has
2 X Processors (8 cores each) with HT enabled
192GB RAM
vSphere HA has been turned on.
Admission Control Policy set to "Host failures the cluster tolerates" with the value of 1.
Created a VM with 2GB vRAM and 1 vCPU. No memory and CPU reservation.
I put one of the host into maintenance mode and try to power on the VM but it failed to power up with the "Insufficient resources to satisfy configured failover level for vSphere HA" error.
Am I missing something?
Thanks,
Alex
I put one of the host into maintenance mode and try to power on the VM but it failed to power up with the "Insufficient resources to satisfy configured failover level for vSphere HA" error.
When having two hosts only there are no hosts left for failover when one of these hosts are in maintenance mode.... That's why it gives you this message..
/Rubeck
I put one of the host into maintenance mode and try to power on the VM but it failed to power up with the "Insufficient resources to satisfy configured failover level for vSphere HA" error.
When having two hosts only there are no hosts left for failover when one of these hosts are in maintenance mode.... That's why it gives you this message..
/Rubeck
If I undertstand your testing correctly
You have placed one host in MM and trying to power ON the VM and you get the error message
Did you Power ON the VM with both host online and then reboot the host where the VM is running and see if its failover to other host in the cluster
Read the HA Deepdive section if not done already
Hi Rubeck,
I get what you mean. I am just trying to simulate host failure by putting one host into maintenance mode to test out the HA but well...
Thanks anyway ![]()
Hi Aravinds,
Your understanding is correct.
I have been rebooting the host using the DCUI which did a graceful shutdown of the VM and thus the HA did not restart the VM on the other host.
I just tried rebooting the host via vSphere client and the HA did restart the VM on the other host.
Thanks ![]()
I wrote a kazillion articles about Admission Control by itself, just do a search on my website:
http://www.yellow-bricks.com/?s=admission%20control
With regards to your question:
As you placed a host in maintenance mode and have an N+1 resiliency defined that N+1 resiliency cannot be guaranteed any longer.
Thanks Duncan.
