Mounting/Mapping commands:
`rbd device map data_pool/data_pool_image_1 --id rbd_user --keyring
/etc/ceph/ceph.client.rbd_user.keyring`
`mount /dev/rbd0 /mountpoint/rbd_data`
data_pool is showing up in a lsblk command as mapped to /dev/rbd0:
~~~
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
rbd0 252:0 0 8T 0 disk
~~~
*Yes, its an 8 TB "disk" - lot of space for bulk files - in truth, its
probably "overkill" but if you've got that much space... :-)
On 05/02/2024 17:43, Curt wrote:
Out of curiosity, how are you mapping the rbd? Have you tried using
guestmount?
I'm just spitballing, I have no experience with your issue, so
probably not much help or useful.
On Mon, 5 Feb 2024, 10:05 duluxoz, <duluxoz@xxxxxxxxx> wrote:
~~~
Hello,
I think that /dev/rbd* devices are flitered "out" or not filter
"in" by the fiter
option in the devices section of /etc/lvm/lvm.conf.
So pvscan (pvs, vgs and lvs) don't look at your device.
~~~
Hi Gilles,
So the lvm filter from the lvm.conf file is set to the default of
`filter = [ "a|.*|" ]`, so that's accept every block device, so no
luck there :-(
~~~
For Ceph based LVM volumes, you would do this to import:
Map every one of the RBDs to the host
Include this in /etc/lvm/lvm.conf:
types = [ "rbd", 1024 ]
pvscan
vgscan
pvs
vgs
If you see the VG:
vgimportclone -n <make a name for VG> /dev/rbd0 /dev/rbd1 ... --import
Now you should be able to vgchange -a y <your VG> and see the LVs
~~~
Hi Alex,
Did the above as you suggested - the rbd devices (3 of them, none
of which were originally part of an lvm on the ceph servers - at
least, not set up manually by me) still do not show up using
pvscan, etc.
So I still can't mount any of them (not without re-creating a fs,
anyway, and thus losing the data I'm trying to read/import) - they
all return the same error message (see original post).
Anyone got any other ideas? <hopeful tone in voice> :-)
Cheers
Dulux-Oz
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