Hello,
I have a problem with our (dead) Ceph-Cluster: The configuration seems
to be gone (deleted / overwritten) and all monitors are gone aswell.
However, we do not have (up-to-date) backups for all VMs (used with
Proxmox) and we would like to recover them from "raw" OSDs only (we have
all OSDs mounted on one Storage Server). Restoring the cluster itself
seems impossible.
To recover the VM images I tried to write a simple tool that:
1) searches all OSDs for udata files
2) Sorts them by Image ID
3) Sorts them by "position" / offset
4) Assembles the 4MB blocks to a single file using dd
(See: https://gitlab.lbader.de/kryptur/ceph-recovery/tree/master )
However, for many (nearly all) images there are missing blocks (empty
parts I guess). So I created a 4MB block of Null-Bytes for each missing
parts.
The problem is that the created Image is not usable. fdisk detects
partitions correctly, but we cannot access the data in any way.
Is there another way to recover the data without having any (working)
ceph tools?
Greetings and Merry Christmas :)
Lennart
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