The immediate cause of the problem is that the osd's "commit_op_seq" file is
reading back '0',
which is invalid; it's created with an initial value of 1. Try removing the
osd data dir
(/var/lib/ceph/osd/ceph-0) completely and let it be recreated; perhaps
something got there somehow by mistake.
Well it looks like commit_op_seq was never created properly:
$ ls /var/lib/ceph/osd/ceph-0/current/
total 4.0K
drwxr-xr-x 1 root root 26 Oct 14 17:40 .
drwxrwx--- 1 root root 74 Oct 14 17:40 ..
-rw-r--r-- 1 root root 0 Oct 14 17:40 commit_op_seq
But how do I delete it to start again?
$ rm -rf current/
rm: cannot remove `current': Directory not empty
$ ls current/
total 4.0K
drwxr-xr-x 1 root root 0 Oct 15 09:16 .
drwxrwx--- 1 root root 26 Oct 15 09:16 ..
This is on a brand new btrfs filesystem mounted in /var/lib/ceph/osd/ceph-0.
I created it with this:
$ mkfs.btrfs -L data -s 4096 /dev/sda1
Did I do something wrong?
Thanks,
Adam.
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