[ovirt-users] Gluster and oVirt 4.0 questions

[Sahina Bose]

On Thu, Mar 30, 2017 at 1:23 PM, Liron Aravot <laravot at redhat.com> wrote:

> Hi Jim, please see inline
>
> On Thu, Mar 30, 2017 at 4:08 AM, Jim Kusznir <jim at palousetech.com> wrote:
>
>> hello:
>>
>> I've been running my ovirt Version 4.0.5.5-1.el7.centos cluster for a
>> while now, and am now revisiting some aspects of it for ensuring that I
>> have good reliability.
>>
>> My cluster is a 3 node cluster, with gluster nodes running on each node.
>> After running my cluster a bit, I'm realizing I didn't do a very optimal
>> job of allocating the space on my disk to the different gluster mount
>> points.  Fortunately, they were created with LVM, so I'm hoping that I can
>> resize them without much trouble.
>>
>> I have a domain for iso, domain for export, and domain for storage, all
>> thin provisioned; then a domain for the engine, not thin provisioned.  I'd
>> like to expand the storage domain, and possibly shrink the engine domain
>> and make that space also available to the main storage domain.  Is it as
>> simple as expanding the LVM partition, or are there more steps involved?
>> Do I need to take the node offline?
>>
>
> I didn't understand completely that part - what is the difference between
> the domain for storage and the domain for engine you mentioned?
>

I think the domain for engine is the one storing Hosted Engine data.
You should be able to expand your underlying LVM partition without having
to take the node offline


>
>> second, I've noticed that the first two nodes seem to have a full copy of
>> the data (the disks are in use), but the 3rd node appears to not be using
>> any of its storage space...It is participating in the gluster cluster,
>> though.
>>
>
Is the volume created as replica 3? If so, fully copy of the data should be
present on all 3 nodes. Please provide the output of "gluster volume info"


>> Third, currently gluster shares the same network as the VM networks.  I'd
>> like to put it on its own network.  I'm not sure how to do this, as when I
>> tried to do it at install time, I never got the cluster to come online; I
>> had to make them share the same network to make that work.
>>
>
While creating the bricks the network intended for gluster should have been
used to identify the brick in hostname:brick-directory. Changing this at a
later point is a bit more involved. Please check online or on gluster-users
on changing IP address associated with brick.


>
> I'm adding Sahina who may shed some light on the gluster question, I'd try
> on the gluster mailing list as well.
>
>>
>>
>> Ovirt questions:
>> I've noticed that recently, I don't appear to be getting software updates
>> anymore.  I used to get update available notifications on my nodes every
>> few days; I haven't seen one for a couple weeks now.  is something wrong?
>>
>> I have a windows 10 x64 VM.  I get a warning that my VM type does not
>> match the installed OS.  All works fine, but I've quadrouple-checked that
>> it does match.  Is this a known bug?
>>
>
> Arik, any info on that?
>
>>
>> I have a UPS that all three nodes and the networking are on.  It is a USB
>> UPS.  How should I best integrate monitoring in?  I could put a raspberry
>> pi up and then run NUT or similar on it, but is there a "better" way with
>> oVirt?
>>
>> Thanks!
>> --Jim
>>
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>>
>>
>
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