AFAIK in case of dm-crypt luks (as default) ceph-disk keeps particular OSD
partition\partitions key in ceph mon attributes and uses OSD partition uuid
as an ID for this key.
So you can get all your keys running:
/usr/bin/ceph config-key ls
You'll get something like:
[
...
"dm-crypt/osd/50250ade-500a-44c4-8a47-00224d76594a/luks",
"dm-crypt/osd/940b5b1c-5926-4aa5-8cd7-ce2f22371d6a/luks",
"dm-crypt/osd/dd28c6ba-c101-4874-bc1c-401b34cb2f9b/luks",
...
]
These uuid are partition uuids.
You can check your *OSD* partition uuid and get particular key as:
# change path to your OSD (*not journal*) partition path
OSD_PATH=/dev/sdXN
OSD_UUID=`blkid -s PARTUUID -o value $OSD_PATH`
/usr/bin/ceph config-key get dm-crypt/osd/$OSD_UUID/luks
2017-09-08 18:18 GMT+05:00 M Ranga Swami Reddy <swamire...@gmail.com>:
> when I create dmcrypted jounral using cryptsetup command, its asking
> for passphase? Can I use passphase as empty?
>
> On Wed, Sep 6, 2017 at 11:23 PM, M Ranga Swami Reddy
> <swamire...@gmail.com> wrote:
> > Thank you. Iam able to replace the dmcrypt journal successfully.
> >
> > On Sep 5, 2017 18:14, "David Turner" <drakonst...@gmail.com> wrote:
> >>
> >> Did the journal drive fail during operation? Or was it taken out during
> >> pre-failure. If it fully failed, then most likely you can't guarantee
> the
> >> consistency of the underlying osds. In this case, you just put the
> affected
> >> osds and add them back in as new osds.
> >>
> >> In the case of having good data on the osds, you follow the standard
> >> process of closing the journal, create the new partition, set up all of
> the
> >> partition metadata so that the ceph udev rules will know what the
> journal
> >> is, and just create a new dmcrypt volume on it. I would recommend using
> the
> >> same uuid as the old journal so that you don't need to update the
> symlinks
> >> and such on the osd. After everything is done, run the journal create
> >> command for the osd and start the osd.
> >>
> >>
> >> On Tue, Sep 5, 2017, 2:47 AM M Ranga Swami Reddy <swamire...@gmail.com>
> >> wrote:
> >>>
> >>> Hello,
> >>> How to replace an OSD's journal created with dmcrypt, from one drive
> >>> to another drive, in case of current journal drive failed.
> >>>
> >>> Thanks
> >>> Swami
> >>> _______________________________________________
> >>> ceph-users mailing list
> >>> ceph-users@lists.ceph.com
> >>> http://lists.ceph.com/listinfo.cgi/ceph-users-ceph.com
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