def db_lookup_disk(conn, device):
"""Looks up a disk from the disks database.
:param device: The device to search
"""
print("{}: LookupDisk: disks query for: {}".format(dt.isoformat(dt.now()), device), file=sys.stderr)
try:
result = r.db('wanwipe').table('disks').get_all(get_disk_serial(device), index='serial_no').run(conn)
for document in result: # Look over the returned documents. There should only be one, serial_no is unique.
print("{}: LookupDisk: disks query found a matching document: {}".format(dt.isoformat(dt.now()), document), file=sys.stderr)
return document.get('id') # Always return the current disk, skipping the below.
print("{}: LookupDisk: couldn't find that disk. Creating new disk.".format(dt.isoformat(dt.now())), file=sys.stderr) # We didn't return above, so...
return db_register_disk(conn, device) # Register the disk with the disks database.
except RqlRuntimeError as kaboom:
print("{}: LookupDisk: disks lookup failed somehow: {}".format(dt.isoformat(dt.now()), kaboom), file=sys.stderr)
def db_register_disk(conn, device):
"""Permanently stores a disk to the disks database.
:param device: The device to add
"""
# First we must populate basic information for the disk.
try:
inserted = r.db('wanwipe').table('disks').insert(
{
'serial_no': get_disk_serial(device),
'device_name': device,
'device_node': "/dev/{}".format(device),
'host_ip': get_global_ip(),
'boot_id': get_boot_id(),
'machine_id': get_dbus_machine_id()
}
).run(conn)
print("{}: RegisterDisk: disk created: {}".format(dt.isoformat(dt.now()), inserted['generated_keys'][0]), file=sys.stderr)
return inserted['generated_keys'][0]
except RqlRuntimeError as kaboom:
print("{}: RegisterDisk: disk creation failed somehow: {}".format(dt.isoformat(dt.now()), kaboom), file=sys.stderr)