[ovirt-users] Re: Add nodes to single node gluster hyperconverged

2021-08-29 Thread Ritesh Chikatwar 
Hello,


Can you check if gluster service is enabled on the cluster. To check go to
compute -> cluster -> edit cluster ->  you will get popup screen see there
will be one naming "checkbox enable gluster services"
if this checkbox is not enabled then please enable and try.

On Sun, Aug 29, 2021 at 10:09 PM Strahil Nikolov via Users 
wrote:

> I know that the GUi should work in most setups, as oVirt is the upstream
> of the Red Hat Gluster Storage Console.
>
> Despite RH being an open-source company, it's also trying to sell support
> contracts and thus it's not an open-documentation company - they need to
> make money after all.
>
> I know that oVirt is 'hardcoded' (this is intentional) to replica 3 when
> upgrading, so you add 2 nodes, then prepare the bricks and modify the
> volumes to 'replica 3', then add a new cycle of 3 nodes and repeat.
>
> Best Regards,
> Strahil Nikolov
>
> Sent from Yahoo Mail on Android
> 
>
> On Fri, Aug 27, 2021 at 20:58, Alex McWhirter
>  wrote:
> On 2021-08-27 13:24, Thomas Hoberg wrote:
>
> > I'd rather doubt the GUI would help you there and what's worse, the
> > GUI doesn't easily tell you what it tries to do. By the time you've
> > found and understood what it tries from the logfiles, you'd have it
> > done on your own.
>
> It's an unfortunate thing that the GUI assumptions can be counter
> intuitive in many regards, but i can confirm you can do this in the GUI
> as long as the gluster volumes was created in the GUI in the first
> place. If not, it will not show up as a volume.
>
> > Now whether or not oVirt will then treat such a hand-made 1->3 node
> > cluster like a 3 node HCI built by itself is something I've never
> > tried.
>
> It will as long as the above gluster volume requirement is met, although
> if using gluster for hosted engine you typically end up doing that by
> hand.
>
> > If I had successfully tested the 3 node to 6 and 9 node expansion, I'd
> > perhaps be more confident. But it could just turn out that without
> > fiddling with the postgres database in the management engine this
> > won't happen.
>
> I do this quite often, add hosts to compute, add bricks to a gluster
> volume, done deal. However we do tend to use ZFS underneath which is
> outside the scope of oVirt. It allows us to re-use existing storage
> elements (providing there is enough space) to create temporary volumes
> to assist in the process.
>
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[ovirt-users] Re: Add nodes to single node gluster hyperconverged

2021-08-29 Thread Strahil Nikolov via Users 
I know that the GUi should work in most setups, as oVirt is the upstream of the 
Red Hat Gluster Storage Console.
Despite RH being an open-source company, it's also trying to sell support 
contracts and thus it's not an open-documentation company - they need to make 
money after all.
I know that oVirt is 'hardcoded' (this is intentional) to replica 3 when 
upgrading, so you add 2 nodes, then prepare the bricks and modify the volumes 
to 'replica 3', then add a new cycle of 3 nodes and repeat.
Best Regards,Strahil Nikolov

Sent from Yahoo Mail on Android 
 
  On Fri, Aug 27, 2021 at 20:58, Alex McWhirter wrote:   On 
2021-08-27 13:24, Thomas Hoberg wrote:

> I'd rather doubt the GUI would help you there and what's worse, the
> GUI doesn't easily tell you what it tries to do. By the time you've
> found and understood what it tries from the logfiles, you'd have it
> done on your own.

It's an unfortunate thing that the GUI assumptions can be counter 
intuitive in many regards, but i can confirm you can do this in the GUI 
as long as the gluster volumes was created in the GUI in the first 
place. If not, it will not show up as a volume.

> Now whether or not oVirt will then treat such a hand-made 1->3 node
> cluster like a 3 node HCI built by itself is something I've never
> tried.

It will as long as the above gluster volume requirement is met, although 
if using gluster for hosted engine you typically end up doing that by 
hand.

> If I had successfully tested the 3 node to 6 and 9 node expansion, I'd
> perhaps be more confident. But it could just turn out that without
> fiddling with the postgres database in the management engine this
> won't happen.

I do this quite often, add hosts to compute, add bricks to a gluster 
volume, done deal. However we do tend to use ZFS underneath which is 
outside the scope of oVirt. It allows us to re-use existing storage 
elements (providing there is enough space) to create temporary volumes 
to assist in the process.
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[ovirt-users] Re: Add nodes to single node gluster hyperconverged

2021-08-27 Thread Alex McWhirter 

On 2021-08-27 13:24, Thomas Hoberg wrote:


I'd rather doubt the GUI would help you there and what's worse, the
GUI doesn't easily tell you what it tries to do. By the time you've
found and understood what it tries from the logfiles, you'd have it
done on your own.


It's an unfortunate thing that the GUI assumptions can be counter 
intuitive in many regards, but i can confirm you can do this in the GUI 
as long as the gluster volumes was created in the GUI in the first 
place. If not, it will not show up as a volume.



Now whether or not oVirt will then treat such a hand-made 1->3 node
cluster like a 3 node HCI built by itself is something I've never
tried.


It will as long as the above gluster volume requirement is met, although 
if using gluster for hosted engine you typically end up doing that by 
hand.



If I had successfully tested the 3 node to 6 and 9 node expansion, I'd
perhaps be more confident. But it could just turn out that without
fiddling with the postgres database in the management engine this
won't happen.


I do this quite often, add hosts to compute, add bricks to a gluster 
volume, done deal. However we do tend to use ZFS underneath which is 
outside the scope of oVirt. It allows us to re-use existing storage 
elements (providing there is enough space) to create temporary volumes 
to assist in the process.

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[ovirt-users] Re: Add nodes to single node gluster hyperconverged

2021-08-27 Thread Thomas Hoberg 
Actually quite a few of my 3 node HCI deployments wound up with only the first 
host showing up in oVirt: Neither the hosts nor the gluster nodes were visible 
for nodes #2 and #3.

Now that could be because I am too impatient and self-discovery will eventually 
add them or it could be because I am using sub-part hardware (Atoms and NUCs in 
my home lab), which causes race conditions with Ansible (yes, that does happen 
with oVirt).

And in those cases I wound up installing the two other nodes as an act of 
desperation before restarting the full re-install, either (first) without the 
hosted-engine option (adding it later) or just with the hosted-engine option, 
as if they were ordinary compute(-only) hosts.

It would have the storage volumes change from being described as single to 
replica (even if on the Gluster level they had always been replicas) and 
advance the cluster to a perfectly normal 3-node HCI.

But I have no way of knowing if the 3-node HCI base configuration had been 
injected into the management engine's database already at that point.

If it wasn't, then indeed a 1-9 single step increase should basically work, but 
oVirt still balks at the natural progression from pure replica to erasure code 
volumes, against which there are many objections hard coded into oVirt Ansible 
and library Python code.

I wish I had the time budget and physical hardware to test this, but 
unfortunately I can only hope someone else has.
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[ovirt-users] Re: Add nodes to single node gluster hyperconverged

2021-08-27 Thread Thomas Hoberg 
Hi Strahil, I am not as confident as you are, that this is actually what the 
single-node is "designed" for. As a matter of fact, any "design purpose 
statement" for the single-node setup seems missing.

The even more glaring omission is any official guide on how to increase HCI 
from 1 to 9 in steps of one, which for me would really earn the title "HCI".

Anyhow, adding additional nodes for compute is easily done by adding such a 
node in the GUI.

Expanding the Gluster underneath to additional replicas, with arbitration or 
full copies is also easy enough, once you have Gluster experience.

I'd rather doubt the GUI would help you there and what's worse, the GUI doesn't 
easily tell you what it tries to do. By the time you've found and understood 
what it tries from the logfiles, you'd have it done on your own.

Actually I find that it's much easier to replicate the storage setup on any 
additional node via Cockpit. So install/enable cockpit, have a look on the 
machine you're trying to replicate and set up LVM, VDO etc. based on the 
original machine.

Doing the Gluster replicas based on that is much easier. That's also what I've 
used to replace fully failed nodes on 3 node HCI clusters.

Now whether or not oVirt will then treat such a hand-made 1->3 node cluster 
like a 3 node HCI built by itself is something I've never tried.

If I had successfully tested the 3 node to 6 and 9 node expansion, I'd perhaps 
be more confident. But it could just turn out that without fiddling with the 
postgres database in the management engine this won't happen.

But since you can re-install any host to become an management engine host, 
again it may be worth trying (after all we'd all love to know if you made it 
work!).

So Mathieu, bonne chance et j'espère que ça va marcher !
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[ovirt-users] Re: Add nodes to single node gluster hyperconverged

2021-08-09 Thread Mathieu Valois 
Moreover, when I want to add a new volume though the UI, there is no DC 
available then I can't :


Le 09/08/2021 à 12:42, Strahil Nikolov a écrit :
I have never managed gluster via the UI, but theoretically it should 
work from there.


Maybe there is a bug.


You can prepare the new bricks (don't forget to "mkfs.xfs -i size=512 
/dev/vg/lv") manually, but it's more error-prone.


Let's see if someone else can confirm that this (UI) behavior is 
expected or not.


Best Regards,
Strahil Nikolov

On Mon, Aug 9, 2021 at 13:21, Mathieu Valois
 wrote:

Currently, in the engine UI, the Volume list is empty (maybe it is
because I don't have the 3 nodes joined the cluster):

Even though the cli volume status shows me one brick:

# gluster volume status vmstore
Status of volume: vmstore
Gluster process TCP Port  RDMA
Port  Online  Pid

--
Brick gluster-ov3.:/gluster_bricks
/vmstore/vmstore 49154 0  Y   244859

Task Status of Volume vmstore

--
There are no active volume tasks

Le 09/08/2021 à 12:12, Strahil Nikolov a écrit :
If the VMs are on the replica 1 volume (and they should), 
converting to 'replica 3' will just copy the data between the nodes.

Check in the UI the volume type , brick count, etc.

I guess you will need to add the two hosts, which oVirt will
automatically add them in Gluster Cluster. You can then open the
UI and create the bricks and change the volume.

You can also do it from cli and once adding the hosts, then they
will be automatically detected properly.

Always test properly on a non-prod environment.

Best Regards,
Strahil Nikolov

On Mon, Aug 9, 2021 at 12:52, Mathieu Valois
  wrote:

So that way, the new hosts will copy the data from the already
provisionned vmstore?

Le 09/08/2021 à 11:35, Strahil Nikolov a écrit :
I think that your VMs are already using the Gluster (replica 1
, a.k.a distributed volume).

You might just add the new host via Engine UI, then through
the UI you can create the bricks and modify the volume .

Of course you can go via cli.


Best Regards,
Strahil Nikolov



On Mon, Aug 9, 2021 at 11:32, Mathieu Valois
  wrote:
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Bretteville-sur-Odon
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 Datadocké



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Bureau Caen: Quartier Kœnig - 153, rue Géraldine MOCK - 14760 
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[ovirt-users] Re: Add nodes to single node gluster hyperconverged

2021-08-09 Thread Strahil Nikolov via Users 
I have never managed gluster via the UI, but theoretically it should work from 
there.
Maybe there is a bug.

You can prepare the new bricks (don't forget to "mkfs.xfs -i size=512 
/dev/vg/lv") manually, but it's more error-prone.
Let's see if someone else can confirm that this (UI) behavior is expected or 
not.
Best Regards,Strahil Nikolov
 
 
  On Mon, Aug 9, 2021 at 13:21, Mathieu Valois wrote:
Currently, in the engine UI, the Volume list is empty (maybe it is because I 
don't have the 3 nodes joined the cluster):
 
 Even though the cli volume status shows me one brick:
 
 
# gluster volume status vmstore
 Status of volume: vmstore
 Gluster process TCP Port  RDMA Port  Online  Pid
--
 Brick gluster-ov3.:/gluster_bricks
 /vmstore/vmstore    49154 0  Y   244859
  
 Task Status of Volume vmstore
--
 There are no active volume tasks
 
 
 Le 09/08/2021 à 12:12, Strahil Nikolov a écrit :
  
 
 If the VMs are on the replica 1 volume (and they should),  converting to 
'replica 3' will just copy the data between the nodes. 
  Check in the UI the volume type , brick count, etc. 
  I guess you will need to add the two hosts, which oVirt will automatically 
add them in Gluster Cluster. You can then open the UI and create the bricks and 
change the volume. 
  You can also do it from cli and once adding the hosts, then they will be 
automatically detected properly. 
  Always test properly on a non-prod environment. 
  Best Regards, Strahil Nikolov
 
 
  On Mon, Aug 9, 2021 at 12:52, Mathieu Valois  wrote: 
So that way, the new hosts will copy the data from the already provisionned 
vmstore?
 
 Le 09/08/2021 à 11:35, Strahil Nikolov a écrit :
  
 
   I think that your VMs are already using the Gluster (replica 1 , a.k.a 
distributed volume). 
  You might just add the new host via Engine UI, then through the UI you can 
create the bricks and modify the volume . 
  Of course you can go via cli. 
  
  Best Regards, Strahil Nikolov 
  
 
 
  On Mon, Aug 9, 2021 at 11:32, Mathieu Valois  wrote:   
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[ovirt-users] Re: Add nodes to single node gluster hyperconverged

2021-08-09 Thread Mathieu Valois 
Currently, in the engine UI, the Volume list is empty (maybe it is 
because I don't have the 3 nodes joined the cluster):


Even though the cli volume status shows me one brick:

   # gluster volume status vmstore
   Status of volume: vmstore
   Gluster process TCP Port  RDMA Port
   Online  Pid
   
--
   Brick gluster-ov3.:/gluster_bricks
   /vmstore/vmstore    49154 0 Y   244859

   Task Status of Volume vmstore
   
--
   There are no active volume tasks

Le 09/08/2021 à 12:12, Strahil Nikolov a écrit :
If the VMs are on the replica 1 volume (and they should), converting 
to 'replica 3' will just copy the data between the nodes.


Check in the UI the volume type , brick count, etc.

I guess you will need to add the two hosts, which oVirt will 
automatically add them in Gluster Cluster. You can then open the UI 
and create the bricks and change the volume.


You can also do it from cli and once adding the hosts, then they will 
be automatically detected properly.


Always test properly on a non-prod environment.

Best Regards,
Strahil Nikolov

On Mon, Aug 9, 2021 at 12:52, Mathieu Valois
 wrote:

So that way, the new hosts will copy the data from the already
provisionned vmstore?

Le 09/08/2021 à 11:35, Strahil Nikolov a écrit :
I think that your VMs are already using the Gluster (replica 1 ,
a.k.a distributed volume).

You might just add the new host via Engine UI, then through the UI
you can create the bricks and modify the volume .

Of course you can go via cli.


Best Regards,
Strahil Nikolov



On Mon, Aug 9, 2021 at 11:32, Mathieu Valois
  wrote:
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[ovirt-users] Re: Add nodes to single node gluster hyperconverged

2021-08-09 Thread Strahil Nikolov via Users 
If the VMs are on the replica 1 volume (and they should),  converting to 
'replica 3' will just copy the data between the nodes.
Check in the UI the volume type , brick count, etc.
I guess you will need to add the two hosts, which oVirt will automatically add 
them in Gluster Cluster. You can then open the UI and create the bricks and 
change the volume.
You can also do it from cli and once adding the hosts, then they will be 
automatically detected properly.
Always test properly on a non-prod environment.
Best Regards,Strahil Nikolov
 
 
  On Mon, Aug 9, 2021 at 12:52, Mathieu Valois wrote:
So that way, the new hosts will copy the data from the already provisionned 
vmstore?
 
 Le 09/08/2021 à 11:35, Strahil Nikolov a écrit :
  
 
 I think that your VMs are already using the Gluster (replica 1 , a.k.a 
distributed volume). 
  You might just add the new host via Engine UI, then through the UI you can 
create the bricks and modify the volume . 
  Of course you can go via cli. 
  
  Best Regards, Strahil Nikolov 
  
 
 
  On Mon, Aug 9, 2021 at 11:32, Mathieu Valois  wrote:   
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[ovirt-users] Re: Add nodes to single node gluster hyperconverged

2021-08-09 Thread Mathieu Valois 
So that way, the new hosts will copy the data from the already 
provisionned vmstore?


Le 09/08/2021 à 11:35, Strahil Nikolov a écrit :
I think that your VMs are already using the Gluster (replica 1 , a.k.a 
distributed volume).


You might just add the new host via Engine UI, then through the UI you 
can create the bricks and modify the volume .


Of course you can go via cli.


Best Regards,
Strahil Nikolov



On Mon, Aug 9, 2021 at 11:32, Mathieu Valois
 wrote:
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[ovirt-users] Re: Add nodes to single node gluster hyperconverged

2021-08-09 Thread Strahil Nikolov via Users 
I think that your VMs are already using the Gluster (replica 1 , a.k.a 
distributed volume).
You might just add the new host via Engine UI, then through the UI you can 
create the bricks and modify the volume .
Of course you can go via cli.

Best Regards,Strahil Nikolov

 
 
  On Mon, Aug 9, 2021 at 11:32, Mathieu Valois wrote:   
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[ovirt-users] Re: Add nodes to single node gluster hyperconverged

2021-08-09 Thread Mathieu Valois 

Thank you for your answer.

If I follow what you say, I guess that the engine storage and the VMs 
storage won't be replicated on a replica 3 gluster, as it would be if I 
ran the 3 nodes gluster hyperconverged wizard?


Moreover, I though of such a scenario to add these nodes:

 * manually create the replica 3 gluster volumes (engine, data, vmstore)
 * migrate the VMs to the replicated vmstore volume
 * ensure everything runs fine
 * backup the engine
 * restore the engine on the replicated engine volume

Should that works?

Thank you,

M.

Le 07/08/2021 à 10:46, Strahil Nikolov a écrit :

Yep, that's the whole idea of the single-node setup .
You have to remove the nodes from the old Engine and then add them via 
Engine UI, andible or api.



Best Regards,
Strahil Nikolov

On Fri, Aug 6, 2021 at 19:47, Mathieu Valois
 wrote:
Hi everyone,

is it possible to add nodes to a single node gluster hyperconverged
setup? I have 3 nodes, one has been reinstalled with single node
HE and
VMs migrated on it. How can I add the two other nodes to this setup?

Thank you,

M.
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[ovirt-users] Re: Add nodes to single node gluster hyperconverged

2021-08-07 Thread Strahil Nikolov via Users 
Yep, that's the whole idea of the single-node setup .You have to remove the 
nodes from the old Engine and then add them via Engine UI, andible or api.

Best Regards,Strahil Nikolov
 
 
  On Fri, Aug 6, 2021 at 19:47, Mathieu Valois wrote:   Hi 
everyone,

is it possible to add nodes to a single node gluster hyperconverged 
setup? I have 3 nodes, one has been reinstalled with single node HE and 
VMs migrated on it. How can I add the two other nodes to this setup?

Thank you,

M.
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