Replace Journal

[Martin Wilderoth <martin.wilderoth@xxxxxxxxxx>]

I have a ceph cluster and I will change my journal devices to new SSD's.

In some instructions of doing this they refer to a journal file (link to UUID of journal )

In my OSD folder this journal don’t exist.

This instructions is renaming the UUID of new device to the old UUID not to break anything.

i was planning to use the command ceph-osd --mkjournal and update the ceph.conf accordingly.

Do I need to take care of my missing journal symlink, i think it is a symlink ?

Why is it there, and how is it used ?.

I actually don’t remember the command i used to create the disk but it's some years ago and i doubt i used ceph-disk.

I found the following process in this list, that seemed good. But its still not clear to me if i can skip this journal link ?

set noout
stop the osds
flush the journal
replace journal SSDs
recreate journal partitions
update ceph.conf to reflect new journal device names
recreate the journal (for the existing osds)
start the osds
unset noout

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