def get_free_devname(device):
if device:
device = ebstool.get_ebs_devname(device)
used_letters = set(row['device'][-1]
for row in Storage.volume_table()
if row['device'] and ( \
row['state'] == 'attached' or ( \
pl.get_instance_type() == 't1.micro' and row['state'] == 'detached')))
with self.letters_lock:
avail_letters = list(set(self.all_letters) - used_letters - self.acquired_letters)
volumes = conn.get_all_volumes(filters={'attachment.instance-id': pl.get_instance_id()})
for volume in volumes:
volume_device = volume.attach_data.device
volume_device = re.sub('\d+', '', volume_device)
try:
avail_letters.remove(volume_device[-1])
except ValueError:
pass
if not device or not (device[-1] in avail_letters) or os.path.exists(device):
letter = firstmatched(
lambda l: not os.path.exists(ebstool.real_devname('/dev/sd%s' % l)), avail_letters
)
if letter:
device = '/dev/sd%s' % letter
self.acquired_letters.add(letter)
else:
raise StorageError('No free letters for block device name remains')
return device
def test_1(self):
v1 = Storage.create(device='/dev/sdo')
v2 = Storage.create(device='/dev/sdm')
table = Storage.volume_table()
self.assertEqual(len(table), 2)
v1row = firstmatched(lambda row: row['device'] == '/dev/sdo', table)
self.assertTrue(v1row)
self.assertEqual(v1row['volume_id'], v1.id)
self.assertEqual(v1row['device'], v1.device)
self.assertEqual(v1row['type'], v1.type)
self.assertEqual(v1row['state'], 'attached')
v2.detach()
table = Storage.volume_table()
self.assertEqual(len(table), 2)
v2row = firstmatched(lambda row: row['device'] == '/dev/sdm', table)
self.assertEqual(v2row['state'], 'detached')
def get_free_devname(device):
if device:
device = ebstool.get_ebs_devname(device)
used_letters = set(row['device'][-1]
for row in Storage.volume_table()
if row['device'] and ( \
row['state'] == 'attached' or ( \
pl.get_instance_type() == 't1.micro' and row['state'] == 'detached')))
with self.letters_lock:
avail_letters = list(
set(self.all_letters) - used_letters -
self.acquired_letters)
volumes = conn.get_all_volumes(
filters={
'attachment.instance-id': pl.get_instance_id()
})
for volume in volumes:
volume_device = volume.attach_data.device
volume_device = re.sub('\d+', '', volume_device)
try:
avail_letters.remove(volume_device[-1])
except ValueError:
pass
if not device or not (device[-1] in avail_letters
) or os.path.exists(device):
letter = firstmatched(
lambda l: not os.path.exists(
ebstool.real_devname('/dev/sd%s' % l)),
avail_letters)
if letter:
device = '/dev/sd%s' % letter
self.acquired_letters.add(letter)
else:
raise StorageError(
'No free letters for block device name remains'
)
return device
