[SOLVED] LXC move disk to another container at Ceph

[CvH]

Hello,

I have a LXC container that includes several disks (mount points) from different ceph pools.
Now we want to move a disk to another LXC container (disk includes just files from a smb share).
So basically LXC (100) vm-100-disk-3 -> LXC (200) vm-200-disk-3.

Backup Restore is not really a option (size/timewise).

I could edit the /etc/pve/lxc/100.conf and remove the disk.
Additionally add it at 200.conf mp3: pool_hdd:vm-100-disk-3,mp=/somewhere,size=20T.
Adding a different ID-Disk to a LXC sounds rather wrong to me and it might create problems at the future.

Is there a handy way in doing it ? Search didn't find anything reasonable, or I looked for the wrong terms

 

[Alwin]

Adding a different ID-Disk to a LXC sounds rather wrong to me and it might create problems at the future.

Yup, it will create problems. Best also rename the image to match the VMID as well.

 

[CvH]

rename the image

never done such things before at ceph level, so forgive me stupid questions

is that the way to go ? ceph fs mv old.disk new.disk

 

[Alwin]

is that the way to go ? ceph fs mv old.disk new.disk

Please see the ceph docs. If things go wrong, you will need to know your way around.
https://docs.ceph.com/en/nautilus/man/8/rbd/

 

[CvH]

tx for pointer

just for the record, that worked for me
rbd -p my_pool_name mv vm-100-disk-3 vm-200-disk-3