[PVE-User] Ceph: Some trouble creating OSD with journal on a sotware raid device...

Marco Gaiarin gaio at sv.lnf.it
Thu Dec 15 12:48:53 CET 2016


Sorry, i came back to this topic because i've done some more tests.

Seems that 'pveceph' tool have some trouble creating OSD with journal
on ''nonstandard'' partition, for examply on a MD device.

A command like:

	pveceph createosd /dev/sde --journal_dev /dev/md4

fail mysteriously (OSD are added to the cluster, out and down, but on
the node even the service get not created, eg, there's nothing to
restart).
Disks get partitioned/formatted (/dev/sde, but also /dev/md4).


If instead i create on the device a GPT partition, for example of type
Linux, i can do:

	pveceph createosd /dev/sde --journal_dev /dev/md4p1

and creation of the OSD work flawlessy, with only a single warning
emitted:

	WARNING:ceph-disk:Journal /dev/md4p1 was not prepared with ceph-disk. Symlinking directly.

But journal work as expected.


I make a note. Thanks.

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