diff options
Diffstat (limited to 'ironic_python_agent/raid_utils.py')
| -rw-r--r-- | ironic_python_agent/raid_utils.py | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/ironic_python_agent/raid_utils.py b/ironic_python_agent/raid_utils.py index 3d5f260f..84c6941f 100644 --- a/ironic_python_agent/raid_utils.py +++ b/ironic_python_agent/raid_utils.py @@ -267,10 +267,44 @@ def get_next_free_raid_device(): name = f'/dev/md{idx}' if name not in names: return name - raise errors.SoftwareRAIDError("No free md (RAID) devices are left") +def get_volume_name_of_raid_device(raid_device): + """Get the volume name of a RAID device + + :param raid_device: A Software RAID block device name. + :returns: volume name of the device, or None + """ + if not raid_device: + return None + try: + out, _ = utils.execute('mdadm', '--detail', raid_device, + use_standard_locale=True) + except processutils.ProcessExecutionError as e: + LOG.warning('Could not retrieve the volume name of %(dev)s: %(err)s', + {'dev': raid_device, 'err': e}) + return None + lines = out.splitlines() + for line in lines: + if re.search(r'Name', line) is not None: + split_array = line.split(':') + # expecting format: + # Name : <host>:name (optional comment) + if len(split_array) == 3: + candidate = split_array[2] + else: + return None + # if name is followed by some other text + # such as (local to host <domain>) remove + # everything after " " + if " " in candidate: + candidate = candidate.split(" ")[0] + volume_name = candidate + return volume_name + return None + + # TODO(rg): handle PreP boot parts relocation as well def prepare_boot_partitions_for_softraid(device, holders, efi_part, target_boot_mode): |