[DRBD-user] linstor-proxmox controller toggle tests

[Igor Cicimov]

On Tue, Nov 13, 2018 at 3:37 AM Yannis Milios <yannis.milios at gmail.com>
wrote:

> As far as I know, Proxmox does not need 3 nodes and/or a quorum, and the
>> LINSTOR controller does not care either.
>>
>
> Thanks for confirming this Robert.
> In my experience, Promox requires a minimum 3 nodes when HA is
> enabled/required. When HA is enabled, and one of the 2 cluster nodes goes
> down, then HA will not function properly, due to not enough remaining votes
> for a working,healthy cluster.
>

Not if you set:

quorum {
  provider: corosync_votequorum
  two_node: 1
...
}

in the corosync config file.

> Since LINSTOR controller functionality in Proxmox is based on HA (VM),
> that will (indirectly) affect also LINSTOR availability, as the HA VM used
> to host it, will stop functioning as soon as Proxmox cluster (corosync)
> looses the quorum majority, hence my recommendation of 3 nodes.
>
> Yannis
>
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