[PVE-User] HA Failover if shared storage fails on one Node

Mark Adams mark at openvs.co.uk
Wed Oct 17 13:29:04 CEST 2018


What interface is your cluster communication (corosync) running over? As
this is the link that needs to be unavailable to initiate a VM start on
another node AFAIK.

Basically, the other nodes in the cluster need to be seeing a problem with
the node. If its still communicating over the whichever interface you have
the cluster communication on then as far as it is concerned the node is
still up. If you just lose access to your storage, then your VM will still
be running in memory.

I don't believe there is any separate storage specific monitoring in
proxmox that could trigger a move to another node. If there is I'm sure
someone else on the list will advise.

Regards,
Mark

On Wed, 17 Oct 2018 at 12:19, Martin Holub <martin at holub.co.at> wrote:

> On 10/17/18 1:11 PM, Gilberto Nunes wrote:
> > Hi
> >
> > How about Node priority?
> > Look section 14.5.2 in this doc
> >
> > https://pve.proxmox.com/pve-docs/pve-admin-guide.html#_configuration_10
> > ---
> > Gilberto Nunes Ferreira
> >
> > (47) 3025-5907
> > (47) 99676-7530 - Whatsapp / Telegram
> >
> > Skype: gilberto.nunes36
> >
> >
> >
> >
> >
> > Em qua, 17 de out de 2018 às 08:05, Martin Holub <martin at holub.co.at>
> > escreveu:
> >
> >> Hi,
> >>
> >> I am currently testing the HA features on a 6 Node Cluster and a NetAPP
> >> Storage with iSCSI and multipath configured on all Nodes. I now tried
> >> what happens if, for any reason, booth Links fail (by shutting down the
> >> Interfaces on one Blade). Unfortunately, altough i had configured HA for
> >> my Test VM, Proxmox seems to not recognize the Storage outtage and
> >> therefore did not migrate the VM to a different blade or removed that
> >> Node from the Cluster (either by resetting it or fencing it somehow
> >> else). Any hints on how to get that solved?
> >>
> >> Thanks,
> >> Martin
> >>
>
> Not shure if i understood what you mean with that reference, but since
> Proxmox does not detect that the Storage is unreachable on that specific
> Cluster Node, how are HA Groups supposed to work around this?
>
> Best,
> Martin
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