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