[ceph-users] Filestore to Bluestore migration question

Hector Martin hector at marcansoft.com
Mon Nov 5 08:08:10 PST 2018

On 11/6/18 12:42 AM, Hayashida, Mami wrote:
> Additional info -- I know that /var/lib/ceph/osd/ceph-{60..69} are not
> mounted at this point (i.e.  mount | grep ceph-60, and 61-69, returns
> nothing.).  They don't show up when I run "df", either.
This is expected. ceph-volume with BlueStore does not use any filesystem
at all, but rather stores its metadata in LVM tags. When the OSDs are
activated, a ramdisk (tmpfs) is mounted on /var/lib/ceph/osd/* and then
the minimal files to start a BlueStore OSD are created from the LVM tags.

The dev-sdh1.device errors sound like systemd is still trying to mount
the old OSDs, which used disk partitions. Look in /etc/fstab and in
/etc/systemd/system for any references to those filesystems and get rid
of them. /dev/sdh1 and company no longer exist, and nothing should
reference them.

Hector Martin (hector at marcansoft.com)
Public Key: https://mrcn.st/pub

More information about the ceph-users mailing list