GitHub user jpt1624 added a comment to the discussion: KVM HA not functioning

thanks for the replies! I did test with VM HA only (Host HA disabled) for a bit 
after I posted this thread. I powered off a KVM host and watched to see if the 
VM would migrate. The host was set to DOWN and the VM attempted to restart on 
the second host but ran into an error due to NFSv3 locking. I'm working on 
updating the shared storage to NFSv4 at the moment. 

Is Host HA not supposed to be used with VM HA? From what I have gathered, Host 
HA introduces a fencing algorithm to help VM HA safely restart VMs on another 
host. From my testing with VM HA, I saw the KVMInvestigator check the shared 
storage status to conclude that the KVM host was actually down before 
attempting migration. Do I even need Host HA then? I haven't had any luck of 
Host HA restarting a KVM host successfully. 



GitHub link: 
https://github.com/apache/cloudstack/discussions/12139#discussioncomment-15099848

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