Hmm.... right as I said that, I just had a thought. I DO have a "backup" server in place (that I haven't even started using yet), that currently has some empty hard drive bays.
It would take some extra work, but I could use that 4th backup server as a temporary staging ground to begin building the new Gluster configuration. Once I have that server + 2 of my production servers rebuilt properly, I could then simply remove and replace this "backup" server with my 3rd server in the cluster. So this effectively means that I have 2 servers that I can take down completely at a single time to rebuild gluster, instead of just 1. I think that simplifies things. Sent with ProtonMail Secure Email. ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ On Saturday, July 10th, 2021 at 6:14 AM, David White <dmwhite...@protonmail.com> wrote: > 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. > > Sent with ProtonMail Secure Email. > > ‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐ > > On Saturday, July 10th, 2021 at 5:55 AM, Strahil Nikolov > <hunter86...@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@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. > > > > > > _______________________________________________ > > > > > > Users mailing list -- users@ovirt.org > > > > > > To unsubscribe send an email to users-le...@ovirt.org > > > > > > Privacy Statement: https://www.ovirt.org/privacy-policy.html > > > > > > oVirt Code of Conduct: > > > https://www.ovirt.org/community/about/community-guidelines/ > > > > > > List Archives: > > > https://lists.ovirt.org/archives/list/users@ovirt.org/message/YHEAXRUNA2RDJRYE74AOHND2QKLM3TAU/
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