Konstantin, thank you very much for the explanation, it was very enlightening.
I believe I left something open in the previous message. I'm using Hosted Engine, all VMs have HA enabled and Power Management is disabled on all hosts. No IPMI configured (at least I didn't configure anything about iLO/IPMI in oVirt). There was a loss of communication with the Storage for approximately 3 minutes and this caused all Hosts to reboot. Em qua., 30 de nov. de 2022 às 08:50, Volenbovskyi, Konstantin < konstantin.volenbovs...@haufe.com> escreveu: > Hi, > > I would say that you observed ‘fencing’ and not SSH soft fencing, but > actual reboot via IPMI. > > https://www.ovirt.org/develop/developer-guide/engine/automatic-fencing.html > > > > You can disable Power management for hosts. > > Before doing that you need to understand following: > > -what is impact on VMs when this happens? > > -the working assumption is that your VMs > work just fine, but you need to think about other cases where VMs lose > their storage and/or network. > > For me it seems that this was storage domain that is not a VM storage > domain, so VMs’ disks were just fine. > > Maybe it was hosted_storage domain in your case… > > -any of those VMs are High-availability VMs? Once you > disable Power Management you will not have automatic restart on different > hosts of those. > > You need to understand that idea of fencing is either to recover host > automatically and possibly to restart VMs > > and make sure that there are no duplicated VMs. > > There are 100% cases where fencing is used and there is subset of those, > X% number of cases where you would consider that behavior is suboptimal. > > The drawback of disabling fencing is that you might get suboptimal > behavior in Y% cases (100% minus X%) > > > > BR, > > Konstantin > > > > *From: *Murilo Morais <mur...@evocorp.com.br> > *Date: *Wednesday, 30 November 2022 at 12:13 > *To: *users <users@ovirt.org> > *Subject: *[ovirt-users] Forced restart when losing communication with > the Storages > > > > Good morning everyone! > > Is there a way to disable the forced reboot of the machines? This morning > there was an event in our infrastructure where the hosts lost communication > with the Storage but this caused all the hosts to restart abruptly. > > Would this be the correct behavior of oVirt? Is there any way to disable > this? >
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