Ceph » ceph-volume

Assuming that `/dev/disk/by-path/pci-0000:00:00.0` is a symlink to `/dev/sda`, and that `/dev/sda` contains a Ceph logical volume, I would expect

```
ceph-volume lvm list /dev/disk/by-path/pci-0000:00:00.0
```

to return the same as

```
ceph-volume lvm list /dev/sda
```

But it doesn't; the former returns `No valid Ceph devices found`, while the latter returns the expected device information.

This has the unfortunate side-effect of breaking Ceph-Ansible idem-potency when `lvm_devices` are specified using `/dev/disk/by-path/*` devices. In that case, the first Ceph-Ansible run works, but second run fails because the playbooks use `ceph-volume lvm list $device` to determine if `$device` is already part of an OSD; because of this issue, they think it isn't and try to add it a second time, which obviously fails.