Hi Experts.
We landed up in a strange bizarre scenario.
Few of our VM complain to power-up in an HA cluster
Quick lookup for vmware KB pointed me to http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1033634
This exactly matched my problem.
Insufficient resources to satisfy configured failover level for vSphere HA | The operation would violate the configured failover level of the vSphere HA cluster. Either change the admission control policy to reserve fewer resources for failover or add more hosts to the cluster. Check the CPU and Memory reservations of the virtual machine in question. As a virtual machine starts up, slot calculation will be affected and fewer slots will be available when a machine with high reservation values is started. |
As mentioned i tried changing the admission control policy
first thing i did was turning off (disable Admission control option)
But i realized turning this off isn't solving the problem but its going to create more as my vm's would be secured
the KB doesnt help me ... what should i keep the admission changed too
i looked for best prac guide
http://www.vmware.com/files/pdf/techpaper/vmw-vsphere-high-availability.pdf
page 16 of this
i gave random % of 10 - 10 each for both CPU and RAM .. and power up my VM's in HA cluster.
now my questions
1. Did i do the right thing by keeping 10 % each ?
2. What should be the ideal number considering 10 ESX servers and close to 20 vm 's running on each
3. How do i arrive at right percentage
4. Can you please explain each of the admission control policy with an example. (i understand the third one.. its very simple... )
-Sr