You can't start the hosted engine storage bin anything less than replica 3 without changing the installer scripts manually.

For the third it can be pretty much anything capable of running as an arbiter.


On January 8, 2018 21:33:25 carl langlois <> wrote:

I should have say replica 3+arbiter when adding the 3rd host.

Yes i know that the documentation specified 3 hosts. But if i understand
this is to make sure the system is always reliable and that make sense. But
my questions is mainly is it possible to start with 2 nodes and had a 3rd
one later..when i had the budget. If i am not mistaking Gluster can work
with 2 nodes.

On Mon, Jan 8, 2018 at 3:15 PM, Vinícius Ferrão <> wrote:

If I’m not wrong GlusterFS in oVirt requires 3 hosts.

Here’s the RHHI guide, it’s pretty much the same for oVirt:

> On 8 Jan 2018, at 18:10, carl langlois <> wrote:
> Hi all
> After screwing my infra with the update to 4.2 (probably a bad
manipulation), i am planning a rebuild of the entire infra. First i want to
replace my NFS storage with a glusterfs storage. All documentation tell me
that i need 3 hosts.. but for the moment i only have 2 but planning to had
more later.
> So does it make sense to start with 2 hosts and use glusterfs as the
storage domain(lets says with a replicate of two with all its limitations).
> If it make sense,
> 1- what is the best way to do it.
> 2- how hard will it be to had the 3rd host when available and make it
replica 2+arbiter.
> Also in a setup where i have 3 hosts (replica 2+arbiter) does all the 3
hosts can run users vm?
> Thanks for your inputs.
> Carl
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