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Pang_Lau's avatar
Pang_Lau
Copper Contributor
Apr 01, 2020

node server down failover cluster fail to move VM to other node

Dear Support,   We have 4 nodes server forming the failover cluster. When I unplug two power cord of one of node, the VM on that node will become unmonitor state, and it failed to move  those VMs t...
failover cluster
John Marlin's avatar
John Marlin
Former Employee
Apr 08, 2020

Pang_Lau 

Does the virtual machine ever move after a period of time?  In Windows 2016 Failover Clustering, we added Compute and VM Resiliency.  It was for those cases where a node or storage may have a transient error and have no connectivity for a very quick brief period of time.  Prior to Windows 2016, if the node went down, all would move over (powered off and on).  This would cause issues if it was only down for say 30 seconds. Once the node was back and joined, the VM would start again.  The VM would either continue running during this time if the physical disk was still accessible or would go into a paused-critical state until the drive came back up as long as it did within the time period allowed.  The setting for this is ResiliencyPeriod and the default period is 240 seconds (4 minutes).  So it would be 4 minutes before the VM would be moved to another node.

 

To see what this is set for would be the commands:

 

Cluster property: 

(Get-Cluster).ResiliencyDefaultPeriod

Group common property for granular control: 

(Get-ClusterGroup “My VM”).ResiliencyPeriod

 

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