Recover image from pool (set min_size)

[Fladi]

Hi there,

beside my problem with the crashed ceph-cluster (see https://forum.proxmox.com/threads/reinstall-proxmox-ceph-node-after-crash.47142/) I have another problem.

I have a separate SSD-Pool with one SSD on each ceph-host. Ceph-1 is still down (see other thread) and the SSD in Ceph-3 seems to be unaccessible. So I only have Ceph-2 with this running.

$ ceph osd pool get ssd6g_lxc min_size
2018-09-16 12:03:10.824751 7fe938580700 0 -- :/1389999952 >> 10.100.210.50:6789/0 pipe(0x7fe93405f760 sd=3 :0 s=1 pgs=0 cs=0 l=1 c=0x7fe93405d450).fault
min_size: 2

So the pool is 3/2 configured and I can't do IO as min-size=2. Unfortunately there is one vm-disk on this pool which is urgently needed.

Is it safe to change min_size to 1?

$ ceph osd pool set data min_size 1

Would I be able to read from the pool afterwards and move image to another pool?

Thanks and br
Tim

 

[Fladi]

Hi,

i recovered the "ohter" server so the pool healed himself with 2 available OSD.

Anyway it would be interesting if this would have worked? Anyone?

br
Tim