Comment 5 for bug 1707222

From another bug with the same root cause, a failure might look like this:
Apr 12 07:56:33 ubuntu [CLOUDINIT] util.py[DEBUG]: Running command ['mount', '-o', 'ro,sync', '-t', 'auto', '/dev/sr0', '/tmp/tmpzq70nqyi'] with allowed return codes [0] (shell=False, capture=True)
Apr 12 07:56:33 ubuntu [CLOUDINIT] util.py[DEBUG]: Failed mount of '/dev/sr0' as 'auto': Unexpected error while running command.#012Command: ['mount', '-o', 'ro,sync', '-t', 'auto', '/dev/sr0', '/tmp/tmpzq70nqyi']#012Exit code: 32#012Reason: -#012Stdout: ''#012Stderr: 'mount: mount point /tmp/tmpzq70nqyi does not exist\n'
Apr 12 07:56:33 ubuntu [CLOUDINIT] util.py[DEBUG]: Recursively deleting /tmp/tmpzq70nqyi