DaanHoogland commented on issue #7543:
URL: https://github.com/apache/cloudstack/issues/7543#issuecomment-1634252324

   @yashi4engg I think I figured out what the problem is. With centos7 this is 
working unless you install qemu-kvm-ev. the porblem is the activity check is 
not giving conclusive answers so it can't know if the host is still active and 
won't move to the recovering or fencing states. Look for messages containing 
`ActivityCheckFailureUnderThresholdRatio`. Do you see these as well?
   the short version HostHA is not supported for EL versions above 7 (or with 
qemu upgraded to a higher qemu-kvm-ev version)
   
   works:
   ```
   qemu-img.x86_64                          10:1.5.3-175.el7_9.6           
@updates
   qemu-kvm.x86_64                          10:1.5.3-175.el7_9.6           
@updates
   qemu-kvm-common.x86_64                   10:1.5.3-175.el7_9.6           
@updates
   ```
   
   doesn't work:
   ```
   qemu-img-ev.x86_64                       10:2.12.0-44.1.el7_8.1         
@centos-qemu-ev
   qemu-kvm-common-ev.x86_64                10:2.12.0-44.1.el7_8.1         
@centos-qemu-ev
   qemu-kvm-ev.x86_64                       10:2.12.0-44.1.el7_8.1         
@centos-qemu-ev
   ```
   


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