Hey Cephers,
The big picture is, that I am trying to migrate a DB to a different
DB-Device. I used to do this many times on Ubuntu 22.04 and Reef. With
Ubuntu 24.04 and Squid however, I am facing a "permission denied"
scenario, that I do not understand. It seems like the "cephadm shell"
container is missing permissions to interact with /dev/ceph-* lvs.
Our setup is containerized with Docker and deployed with cephadm.
From within "cephadm shell":
"ls -alh
/dev/ceph-0bafc014-2bc6-4ecf-96a2-80b2dd414ad2/osd-block-91ae2955-577a-4722-8548-5e78372f065
0
ls: cannot access
'/dev/ceph-0bafc014-2bc6-4ecf-96a2-80b2dd414ad2/osd-block-91ae2955-577a-4722-8548-5e78372f0650':
No such file or directory"
From root on the same host:
"ls -alh
/dev/ceph-0bafc014-2bc6-4ecf-96a2-80b2dd414ad2/osd-block-91ae2955-577a-4722-8548-5e78372f0650
lrwxrwxrwx 1 root root 7 Jun 25 17:12
/dev/ceph-0bafc014-2bc6-4ecf-96a2-80b2dd414ad2/osd-block-91ae2955-577a-4722-8548-5e78372f0650
-> ../dm-3"
The container just cannot "see" the lv-device.
Something like
"ceph-volume lvm activate 1 91ae2955-577a-4722-8548-5e78372f0650"
will then just fail with:
```
Running command: /usr/bin/ceph-authtool --gen-print-key
Running command: /usr/bin/ceph-authtool --gen-print-key
Running command: /usr/bin/chown -R ceph:ceph /var/lib/ceph/osd/ceph-1
Running command: /usr/bin/ceph-bluestore-tool --cluster=ceph
prime-osd-dir --dev
/dev/ceph-0bafc014-2bc6-4ecf-96a2-80b2dd414ad2/osd-block-91ae2955-577a-4722-8548-5e78372f0650
--path /var/lib/ceph/osd/ceph-1 --no-mon-config
stderr: failed to read label for
/dev/ceph-0bafc014-2bc6-4ecf-96a2-80b2dd414ad2/osd-block-91ae2955-577a-4722-8548-5e78372f0650:
(1) *Operation not permitted*
stderr: 2026-06-29T15:57:48.848+0000 7e8959bbca80 -1
bdev(0x5d2610965800
/dev/ceph-0bafc014-2bc6-4ecf-96a2-80b2dd414ad2/osd-block-91ae2955-577a-4722-8548-5e78372f0650)
open stat got: (1) Operation not permitted
--> RuntimeError: command returned non-zero exit status: 1
```
Has anyone had this problem and solved it?
Is the recommended way to install ceph utilities like ceph-volume on the
host instead using the toolkit from the cephadm shell?
Best
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