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From Andrija Panic <>
Subject Re: Host failed issues
Date Wed, 03 Jun 2015 20:52:08 GMT
Hi Carlos,

Im not familiar with Zen, but on KVM - you would "virsh destroy i-xx-yy-VM"
and then edit the DB set VM state to Stopped.

That should be sufficient to stop VM manually.

Check from Zen Center if possible to shutdown VM...

If you still start VM for some reason on bad host - you can play with
last_host_id field in cloud.instance table (or similar name...), while the
VM is off, edit to point to some other host ID, and ACS should later try to
start it on that  "new" host

Hope that helps

On 3 June 2015 at 22:39, Carlos Reategui <> wrote:

> Hi All,
> I have a cluster with a pod of 6 XenServer 6.2 hosts on CloudStack 4.4.0.
> One of the hosts stopped/rebooted suddenly and now can't find its disks
> (dell on the way).  Luckily the host was not the pool master but it did
> have the VR running on it so no instances could be created or started.  My
> network is a basic network without security groups.
> CS recognized that the host was down and also the VR, but it was unable to
> move the VR to a different machine.  After destroying the VR from the UI it
> came up on a different machine.  I would have expected CS to have moved the
> VR automatically but maybe I don't have something setup correctly.
> In the hosts tab I put the failed host in maintenance mode.  I tried
> starting an instance that had previously been stopped.  CS started it on
> the bad host and reported that it was successful even though it was not.
> Why did it do this if the host was down and in maint mode??  Now I can't
> stop that instance or migrate it.  I took the host out of maintenance mode
> and marked it as disabled instead.  I still can't stop the instance that
> thinks it is on the bad host.  Do I need to edit the DB to fix this
> instance?
> Any ideas?
> thanks,
> Carlos


Andrija Panić

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