[PVE-User] proxmox ceph osd option to move wal to a new device

[Eneko Lacunza]

Hi Marco,

El 12/1/22 a las 14:57, Marco Witte escribió:
> One wal drive was failing. So I replaced it with:
> pveceph osd destroy 17 --cleanup 1
> pveceph osd destroy 18 --cleanup 1
> pveceph osd destroy 19 --cleanup 1
>
> This removed the three disks and removed the osd-wal.
>
> The Drive sdf is the replacement for the failed wal device that above 
> three osds ( sdb, sdc,sdd ) used:
> pveceph osd create /dev/sdb -wal_dev /dev/sdf
> pveceph osd create /dev/sdc -wal_dev /dev/sdf
> pveceph osd create /dev/sdd -wal_dev /dev/sdf
>
> This approach worked fine, but took a lot of time.
>
> So I figured it would be better to change the wal for the existing osd:
> At this state /dev/sdf is completly empty (has no lvm/wiped) and all 
> three osd still use the failing wal device /dev/sdh.
>
> ceph-volume lvm new-wal --osd-id 17 --osd-fsid 
> 01234567-1234-1234-123456789012 --target /dev/sdf
>
> Which obviously fails, because the target should be --target 
> vgname/new_wal
>
> Question part:
> What would be the fast way to make the new device /dev/sdf the wal 
> device, without destroying the osds 17 18 19?
>

I have moved wal/db between physical partitions to increase size in some 
old upgraded clusters.

It should be similar. Try searching "Ceph bluestore db resize". 
Otherwise I can send you my procedure with spanish comments... :)

Cheers

Eneko Lacunza
Zuzendari teknikoa | Director técnico
Binovo IT Human Project

Tel. +34 943 569 206 | https://www.binovo.es
Astigarragako Bidea, 2 - 2º izda. Oficina 10-11, 20180 Oiartzun

https://www.youtube.com/user/CANALBINOVO
https://www.linkedin.com/company/37269706/