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From koushik-das <...@git.apache.org>
Subject [GitHub] cloudstack issue #1640: CLOUDSTACK-9458: Fix HA bug when VMs are stopped on ...
Date Thu, 18 Aug 2016 06:59:08 GMT
Github user koushik-das commented on the issue:

    https://github.com/apache/cloudstack/pull/1640
  
    Please use a proper ACS release for reporting bugs. In your case you may have to do some
additional cherry-picks.
    
    "Schedule restart" does multiple tasks. There is a method by this name in code, the name
may not be the most appropriate but it does the following. So don't get confused with the
name
    1. Tries to find out if the VM is alive or not
    2. If it is not able to determine conclusively if VM is alive, then it tries to fence
off VM
    3. After successful fencing, HA enabled VMs are restarted on another host, non-HA VMs
are marked as Stopped
    
    So as you see non-HA VMs are simply stopped when the host is determined as down and not
restarted. It makes sense to mark them as stopped so that subsequent operations can be performed
on the VMs, for e.g. selective VMs may be explicitly started on another host. If a host is
down then power sync won't happen for that host and VM states on that host won't get updated.


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