Device Path Pattern for Block Devices Rejects Legitimate Paths

[Joseph Phillips]

The following log output was observed while working to resolve an unrelated issue:
https://pastebin.canonical.com/p/gVgxVFmJd9/

The regular expression that designates a valid device path expects only the device name in the final segment - in this example that would mean "sdn1" instead of "sdn/sdn1".

This doesn't appear to be an error condition - the device path is simply not stored in state against the device. It should be fixed though.

[Joseph Phillips (manadart)]

Happens with the OCI provider too:

machine-0: 10:29:11 DEBUG juju.worker.diskmanager non matching DEVPATH for "sda1": "/devices/pci0000:00/0000:00:04.0/virtio0/host2/target2:0:0/2:0:0:1/block/sda/sda1"
machine-0: 10:29:11 DEBUG juju.worker.diskmanager non matching DEVPATH for "sda14": "/devices/pci0000:00/0000:00:04.0/virtio0/host2/target2:0:0/2:0:0:1/block/sda/sda14"
machine-0: 10:29:11 DEBUG juju.worker.diskmanager non matching DEVPATH for "sda15": "/devices/pci0000:00/0000:00:04.0/virtio0/host2/target2:0:0/2:0:0:1/block/sda/sda15"

[Harry Pidcock (hpidcock)]

https://github.com/juju/juju/pull/10643