OK so it sees the pv* commands have a side-effect of dropping the by- dname entries, so when the charm creates the PV and then tries to use it for the VG its disappeared.
ubuntu@node-licetus:~$ sudo pvcreate /dev/disk/by-dname/bcache3 Physical volume "/dev/disk/by-dname/bcache3" successfully created. ubuntu@node-licetus:~$ ls -l /dev/disk/by-dname/ total 0 lrwxrwxrwx 1 root root 13 May 15 06:18 bcache1 -> ../../bcache2 lrwxrwxrwx 1 root root 13 May 15 06:18 bcache2 -> ../../bcache1 lrwxrwxrwx 1 root root 13 May 15 06:18 bcache43 -> ../../bcache3 lrwxrwxrwx 1 root root 13 May 15 06:18 nvme0n1 -> ../../nvme0n1 lrwxrwxrwx 1 root root 15 May 15 06:18 nvme0n1-part1 -> ../../nvme0n1p1 lrwxrwxrwx 1 root root 15 May 15 06:18 nvme0n1-part2 -> ../../nvme0n1p2 lrwxrwxrwx 1 root root 9 May 15 06:18 sda -> ../../sda lrwxrwxrwx 1 root root 10 May 15 06:18 sda-part1 -> ../../sda1 lrwxrwxrwx 1 root root 10 May 15 06:18 sda-part2 -> ../../sda2 lrwxrwxrwx 1 root root 9 May 15 06:18 sdb -> ../../sdb lrwxrwxrwx 1 root root 9 May 15 06:18 sdc -> ../../sdc lrwxrwxrwx 1 root root 9 May 15 06:18 sdd -> ../../sdd -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to lvm2 in Ubuntu. https://bugs.launchpad.net/bugs/1878752 Title: vgcreate fails on /dev/disk/by-dname block devices Status in OpenStack ceph-osd charm: New Status in lvm2 package in Ubuntu: New Bug description: Ubuntu Focal, OpenStack Charmers Next Charms. juju run-action --wait ceph-osd/0 add-disk osd-devices=/dev/disk/by- dname/bcache2 unit-ceph-osd-0: UnitId: ceph-osd/0 id: "5" message: exit status 1 results: ReturnCode: 1 Stderr: | partx: /dev/disk/by-dname/bcache2: failed to read partition table Failed to find physical volume "/dev/bcache1". Failed to find physical volume "/dev/bcache1". Device /dev/disk/by-dname/bcache2 not found. Traceback (most recent call last): File "/var/lib/juju/agents/unit-ceph-osd-0/charm/actions/add-disk", line 79, in <module> request = add_device(request=request, File "/var/lib/juju/agents/unit-ceph-osd-0/charm/actions/add-disk", line 34, in add_device charms_ceph.utils.osdize(device_path, hookenv.config('osd-format'), File "lib/charms_ceph/utils.py", line 1497, in osdize osdize_dev(dev, osd_format, osd_journal, File "lib/charms_ceph/utils.py", line 1570, in osdize_dev cmd = _ceph_volume(dev, File "lib/charms_ceph/utils.py", line 1705, in _ceph_volume cmd.append(_allocate_logical_volume(dev=dev, File "lib/charms_ceph/utils.py", line 1965, in _allocate_logical_volume lvm.create_lvm_volume_group(vg_name, pv_dev) File "hooks/charmhelpers/contrib/storage/linux/lvm.py", line 104, in create_lvm_volume_group check_call(['vgcreate', volume_group, block_device]) File "/usr/lib/python3.8/subprocess.py", line 364, in check_call raise CalledProcessError(retcode, cmd) subprocess.CalledProcessError: Command '['vgcreate', 'ceph-911bc34b-4634-4ebd-a055-876b978d0b0a', '/dev/disk/by-dname/bcache2']' returned non-zero exit status 5. Stdout: |2 Physical volume "/dev/disk/by-dname/bcache2" successfully created. status: failed timing: completed: 2020-05-15 06:04:41 +0000 UTC enqueued: 2020-05-15 06:04:30 +0000 UTC started: 2020-05-15 06:04:39 +0000 UTC The same action on the /dev/bcacheX device succeeds - looks like some sort of behaviour break in Ubuntu. To manage notifications about this bug go to: https://bugs.launchpad.net/charm-ceph-osd/+bug/1878752/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
