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From Ahmad Emneina <aemne...@gmail.com>
Subject Re: Host Down - CS Reports VMs Running on failed host
Date Sat, 19 Oct 2013 21:31:32 GMT
CloudStack initially queries the host (host1 in this case), but if it fails
to connect to that host.. it will do further investigation by querying the
vm from another host in the cluster. Thats probably why it hasnt tried to
HA your vm's, it can see they're alive from host2.


On Sat, Oct 19, 2013 at 2:22 PM, Eric Tykwinski <eric-list@truenet.com>wrote:

> Ashley,
>
> I was just playing with this in my own lab...
> I'm currently running XenServer 6.2.  From what I can tell, CloudStack
> relies on the underlying hypervisor to do HA.
> I'm thinking CloudStack uses the restart.retry.interval variable to test
> whether the host/vm is alive even if the underlying hypervisor has moved
> the vm.  Coming from a background in ESXi and used to the single ping
> delay, I'm a bit confused on optimal settings in a work environment.
>
> l variable,
> Sincerely,
>
> Eric Tykwinski
> TrueNet, Inc.
> P: 610-429-8300
> F: 610-429-3222
>
> On Oct 19, 2013, at 4:48 PM, CSG - Ashley Lester <
> ashley@computer-services.com.au> wrote:
>
> > Hello,
> >
> > I have a situation where CS has emailed a alert saying host 2 (was the
> pool master) is down:
> > I have found the following :
> >
> > Checking finds XenServer Host 2 running but not accessible in the pool,
> its console show "No VMs Running on this host"
> > CouldStack reports Host 2 down but also reports that some  VMs are
> running on this host
> > The VMs that CS reports as running on the host2 are still actually
> running on host2, I can log into them and they are not present on any other
> host
> >
> > Asking CS to move the VM to another host fails.
> >
> > Can anyone help with some advise ?
> >
> > I was considering a toolstack reboot on the "failed host"
>
>
>

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