Re: Almost there - trying to recover cephfs from power outage

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Thanks Dan! The recovery is now complete!


On 9/21/22 00:43, Dan van der Ster wrote:
Hi Jorge,

There was an older procedure before the --recover flag.
You can find that here:
    https://github.com/ceph/ceph/pull/42295/files
It was the result of this tracker: https://tracker.ceph.com/issues/51341

Also, here was the change which added the --recover flag:
https://tracker.ceph.com/issues/51716
There you can see the old process described again.

Good luck,

Dan


On Tue, Sep 20, 2022 at 9:00 PM Jorge Garcia <jgarcia@xxxxxxxxxxxx> wrote:
I have been trying to recover our ceph cluster from a power outage. I
was able to recover most of the cluster using the data from the OSDs.
But the MDS maps were gone, and now I'm trying to recover that. I was
looking around and found a section in the Quincy manual titled
RECOVERING THE FILE SYSTEM AFTER CATASTROPHIC MONITOR STORE LOSS. It
talks about using the following command:

    ceph fs new <fs_name> <metadata_pool> <data_pool> --force --recover

The problem is that we're running Nautilus, and it seems that the
"--recover" flag doesn't exist yet. Are we out of luck? At the moment,
the cluster has only one mds (currently reporting as standby) and one
cephfs filesystem (currently not enabled, according to "ceph fs ls").

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