10:14 a.m.
On Tue, Oct 11, 2022 at 1:42 PM Klaas Demter <klaasdemter(a)gmail.com> wrote:
Don't storage leases solve that problem?
Not entirely, you are not able to kill a VM via storage lease, you can only
detect that even though we lost connection from engine to host (and this
means also VMs), then we can check if host/VM leases are refresh and if so,
we are not trying to restart VM on a different host
I seem to recall a HA VM also works when (gets restarted on other
node) a
hypervisor completely loses power, ie there is no response on the fencing
device. I'd expect it to work the same without a fencing device.
So if that happens, it's not a completely correct setup. If you want
reliable power management, then your power management network should be
independent on your data network, so if there is an issue with data
network, you should be able to use power management network to check power
status and perform reboot if needed. Of course if both networks are down,
then you have a problem, but that should be a rare case.
Greetings
Klaas
On 10/11/22 11:46, Martin Perina wrote:
Hi,
there is no other way how to provide reliable HA VMs in oVirt wihout any
hardware power management. If your servers don't provide any HW power
management (such as IPMI, ILO, DRAC, ...), then the only option is to
attach their power supply inputs through UPS with remote access and use apc
fencing driver to restart servers using UPS.
Martin
On Tue, Oct 11, 2022 at 9:41 AM samuel.xhu(a)horebdata.cn <
samuel.xhu(a)horebdata.cn> wrote:
> Dear Ovirt folks,
>
> I am thinking of deploly an experimental Ovirt 3-node Cluster on servers
> without IPMI. As far i know, Ovirts needs each host to have fence agent
> working for any HA virtual machine. My question is, are there any other
> ways in Ovirt to support fencing without using IPMI?
>
> thanks a lot,
>
> Samuel
>
>
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Martin Perina
Manager, Software Engineering
Red Hat Czech s.r.o.
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