5:14 a.m.
Thank you. And yes, I agree, this needs to occur in a maintenance window and be done very
carefully. :)
My only problem with this method is that I need to *replace* disks in the two servers.
I don't have any empty hard drive bays, so will effectively need to put a host into
maintenance mode, remove the drives, and put new drives in.
I will NOT be touching the OS drives, however, as those are on their own separate RAID
array.
So, essentially, it will need to look something like this:
- Put the cluster into global maintenance mode
- Put 1 host into full maintenance mode / deactivate it
- Stop gluster
- Remove the storage
- Add the new storage & reconfigure
- Start gluster
- Re-add the host to the cluster
Adding the new storage & reconfiguring is the head scratcher for me, given that I
don't have room for the old hard drives + new hard drives at the same time.
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‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐
On Saturday, July 10th, 2021 at 5:55 AM, Strahil Nikolov <hunter86_bg(a)yahoo.com>
wrote:
Hi David,
any storage operation can cause unexpected situations, so always plan
your activites for low traffic hours and test them on your test environment in advance.
I think it's easier if you (command line):
-verify no heals are pending. Not a single one.- set the host to
maintenance over ovirt- remove the third node from gluster volumes (remove-brick replica
2)- umount the bricks on the third node- recreate a smaller LV with '-i maxpct=90
size=512' and mount it with the same options like the rest of the nodes. Usually I use
'noatime,inode64,context=system_u:object_r:glusterd_brick_t:s0'- add this new
brick (add-brick replica 3 arbiter 1) to the volume- wait for the heals to finish
Then repeat again for each volume.
Adding the new disks should be done later.
Best Regards,Strahil Nikolov
> On Sat, Jul 10, 2021 at 3:15, David White via
Users<users(a)ovirt.org> wrote:My current hyperconverged environment is replicating
data across all 3 servers.
> I'm running critically low on disk space, and need to add space.
>
> To that end, I've ordered 8x 800GB ssd drives, and plan to
put 4 drives in 1 server, and 4 drives in the other.
>
> What's my best option for reconfiguring the hyperconverged
cluster, to change gluster storage away from Replica 3 to a Replica 2 / Arbiter model?
> I'd really prefer not to have to reinstall things from scratch, but I'll do
that if I have to.
>
> My most important requirement is that I cannot have any downtime
for my VMs (so I can only reconfigure 1 host at a time).
>
> Sent with ProtonMail Secure Email.
>
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