def get_device_name_for_instance(context, instance, bdms, device):
"""Validates (or generates) a device name for instance.
If device is not set, it will generate a unique device appropriate
for the instance. It uses the block device mapping table to find
valid device names. If the device name is valid but applicable to
a different backend (for example /dev/vdc is specified but the
backend uses /dev/xvdc), the device name will be converted to the
appropriate format.
"""
req_prefix = None
req_letter = None
if device:
try:
req_prefix, req_letter = block_device.match_device(device)
except (TypeError, AttributeError, ValueError):
raise exception.InvalidDevicePath(path=device)
mappings = block_device.instance_block_mapping(instance, bdms)
try:
prefix = block_device.match_device(mappings['root'])[0]
except (TypeError, AttributeError, ValueError):
raise exception.InvalidDevicePath(path=mappings['root'])
# NOTE(vish): remove this when xenapi is setting default_root_device
if driver.compute_driver_matches('xenapi.XenAPIDriver'):
prefix = '/dev/xvd'
if req_prefix != prefix:
LOG.debug(_("Using %(prefix)s instead of %(req_prefix)s"),
{'prefix': prefix, 'req_prefix': req_prefix})
used_letters = set()
for device_path in mappings.itervalues():
letter = block_device.strip_prefix(device_path)
# NOTE(vish): delete numbers in case we have something like
# /dev/sda1
letter = re.sub("\d+", "", letter)
used_letters.add(letter)
# NOTE(vish): remove this when xenapi is properly setting
# default_ephemeral_device and default_swap_device
if driver.compute_driver_matches('xenapi.XenAPIDriver'):
instance_type = flavors.extract_flavor(instance)
if instance_type['ephemeral_gb']:
used_letters.add('b')
if instance_type['swap']:
used_letters.add('c')
if not req_letter:
req_letter = _get_unused_letter(used_letters)
if req_letter in used_letters:
raise exception.DevicePathInUse(path=device)
device_name = prefix + req_letter
return device_name
def get_next_device_name(instance, device_name_list,
root_device_name=None, device=None):
"""Validates (or generates) a device name for instance.
If device is not set, it will generate a unique device appropriate
for the instance. It uses the root_device_name (if provided) and
the list of used devices to find valid device names. If the device
name is valid but applicable to a different backend (for example
/dev/vdc is specified but the backend uses /dev/xvdc), the device
name will be converted to the appropriate format.
"""
req_prefix = None
req_letter = None
if device:
try:
req_prefix, req_letter = block_device.match_device(device)
except (TypeError, AttributeError, ValueError):
raise exception.InvalidDevicePath(path=device)
if not root_device_name:
root_device_name = block_device.DEFAULT_ROOT_DEV_NAME
try:
prefix = block_device.match_device(
block_device.prepend_dev(root_device_name))[0]
except (TypeError, AttributeError, ValueError):
raise exception.InvalidDevicePath(path=root_device_name)
# NOTE(vish): remove this when xenapi is setting default_root_device
if driver.is_xenapi():
prefix = '/dev/xvd'
if req_prefix != prefix:
LOG.debug("Using %(prefix)s instead of %(req_prefix)s",
{'prefix': prefix, 'req_prefix': req_prefix})
used_letters = set()
for device_path in device_name_list:
letter = block_device.get_device_letter(device_path)
used_letters.add(letter)
# NOTE(vish): remove this when xenapi is properly setting
# default_ephemeral_device and default_swap_device
if driver.is_xenapi():
flavor = instance.get_flavor()
if flavor.ephemeral_gb:
used_letters.add('b')
if flavor.swap:
used_letters.add('c')
if not req_letter:
req_letter = _get_unused_letter(used_letters)
if req_letter in used_letters:
raise exception.DevicePathInUse(path=device)
return prefix + req_letter
def get_next_device_name(instance, device_name_list, root_device_name=None, device=None):
"""Validates (or generates) a device name for instance.
If device is not set, it will generate a unique device appropriate
for the instance. It uses the root_device_name (if provided) and
the list of used devices to find valid device names. If the device
name is valid but applicable to a different backend (for example
/dev/vdc is specified but the backend uses /dev/xvdc), the device
name will be converted to the appropriate format.
"""
req_prefix = None
req_letter = None
if device:
try:
req_prefix, req_letter = block_device.match_device(device)
except (TypeError, AttributeError, ValueError):
raise exception.InvalidDevicePath(path=device)
if not root_device_name:
root_device_name = block_device.DEFAULT_ROOT_DEV_NAME
try:
prefix = block_device.match_device(root_device_name)[0]
except (TypeError, AttributeError, ValueError):
raise exception.InvalidDevicePath(path=root_device_name)
# NOTE(vish): remove this when xenapi is setting default_root_device
if driver.compute_driver_matches("xenapi.XenAPIDriver"):
prefix = "/dev/xvd"
if req_prefix != prefix:
LOG.debug("Using %(prefix)s instead of %(req_prefix)s", {"prefix": prefix, "req_prefix": req_prefix})
used_letters = set()
for device_path in device_name_list:
letter = block_device.strip_prefix(device_path)
# NOTE(vish): delete numbers in case we have something like
# /dev/sda1
letter = re.sub("\d+", "", letter)
used_letters.add(letter)
# NOTE(vish): remove this when xenapi is properly setting
# default_ephemeral_device and default_swap_device
if driver.compute_driver_matches("xenapi.XenAPIDriver"):
flavor = flavors.extract_flavor(instance)
if flavor["ephemeral_gb"]:
used_letters.add("b")
if flavor["swap"]:
used_letters.add("c")
if not req_letter:
req_letter = _get_unused_letter(used_letters)
if req_letter in used_letters:
raise exception.DevicePathInUse(path=device)
return prefix + req_letter
def get_device_name_for_instance(context, instance, bdms, device):
"""Validates (or generates) a device name for instance.
If device is not set, it will generate a unique device appropriate
for the instance. It uses the block device mapping table to find
valid device names. If the device name is valid but applicable to
a different backend (for example /dev/vdc is specified but the
backend uses /dev/xvdc), the device name will be converted to the
appropriate format.
"""
req_prefix = None
req_letter = None
if device:
try:
req_prefix, req_letter = block_device.match_device(device)
except (TypeError, AttributeError, ValueError):
raise exception.InvalidDevicePath(path=device)
mappings = block_device.instance_block_mapping(instance, bdms)
try:
prefix = block_device.match_device(mappings['root'])[0]
except (TypeError, AttributeError, ValueError):
raise exception.InvalidDevicePath(path=mappings['root'])
# NOTE(vish): remove this when xenapi is setting default_root_device
if driver.compute_driver_matches('xenapi.XenAPIDriver'):
prefix = '/dev/xvd'
if req_prefix != prefix:
LOG.debug(_("Using %(prefix)s instead of %(req_prefix)s") % locals())
used_letters = set()
for device_path in mappings.itervalues():
letter = block_device.strip_prefix(device_path)
# NOTE(vish): delete numbers in case we have something like
# /dev/sda1
letter = re.sub("\d+", "", letter)
used_letters.add(letter)
# NOTE(vish): remove this when xenapi is properly setting
# default_ephemeral_device and default_swap_device
if driver.compute_driver_matches('xenapi.XenAPIDriver'):
instance_type = instance_types.extract_instance_type(instance)
if instance_type['ephemeral_gb']:
used_letters.add('b')
if instance_type['swap']:
used_letters.add('c')
if not req_letter:
req_letter = _get_unused_letter(used_letters)
if req_letter in used_letters:
raise exception.DevicePathInUse(path=device)
device_name = prefix + req_letter
return device_name
def get_device_name_for_instance(context, instance, device):
"""Validates (or generates) a device name for instance.
If device is not set, it will generate a unique device appropriate
for the instance. It uses the block device mapping table to find
valid device names. If the device name is valid but applicable to
a different backend (for example /dev/vdc is specified but the
backend uses /dev/xvdc), the device name will be converted to the
appropriate format.
"""
req_prefix = None
req_letters = None
if device:
try:
req_prefix, req_letters = block_device.match_device(device)
except (TypeError, AttributeError, ValueError):
raise exception.InvalidDevicePath(path=device)
bdms = db.block_device_mapping_get_all_by_instance(context,
instance['uuid'])
mappings = block_device.instance_block_mapping(instance, bdms)
try:
prefix = block_device.match_device(mappings['root'])[0]
except (TypeError, AttributeError, ValueError):
raise exception.InvalidDevicePath(path=mappings['root'])
# NOTE(vish): remove this when xenapi is setting default_root_device
if (FLAGS.connection_type == 'xenapi' or
FLAGS.compute_driver.endswith('xenapi.XenAPIDriver')):
prefix = '/dev/xvd'
if req_prefix != prefix:
LOG.debug(_("Using %(prefix)s instead of %(req_prefix)s") % locals())
letters_list = []
for _name, device in mappings.iteritems():
letter = block_device.strip_prefix(device)
# NOTE(vish): delete numbers in case we have something like
# /dev/sda1
letter = re.sub("\d+", "", letter)
letters_list.append(letter)
used_letters = set(letters_list)
# NOTE(vish): remove this when xenapi is properly setting
# default_ephemeral_device and default_swap_device
if (FLAGS.connection_type == 'xenapi' or
FLAGS.compute_driver.endswith('xenapi.XenAPIDriver')):
instance_type_id = instance['instance_type_id']
instance_type = instance_types.get_instance_type(instance_type_id)
if instance_type['ephemeral_gb']:
used_letters.update('b')
if instance_type['swap']:
used_letters.update('c')
if not req_letters:
req_letters = _get_unused_letters(used_letters)
if req_letters in used_letters:
raise exception.DevicePathInUse(path=device)
return prefix + req_letters
def attach_volume(self, context, instance, volume_id, device=None,
disk_bus=None, device_type=None):
"""Attach an existing volume to an existing instance."""
if device and not block_device.match_device(device):
raise exception.InvalidDevicePath(path=device)
volume = self.volume_api.get(context, volume_id)
self.volume_api.check_attach(context, volume, instance=instance)
return self._call_to_cells(context, instance, 'attach_volume',
volume_id, device, disk_bus, device_type)
def get_device_name_for_instance(context, instance, device):
"""Validates (or generates) a device name for instance.
If device is not set, it will generate a unique device appropriate
for the instance. It uses the block device mapping table to find
valid device names. If the device name is valid but applicable to
a different backend (for example /dev/vdc is specified but the
backend uses /dev/xvdc), the device name will be converted to the
appropriate format.
"""
req_prefix = None
req_letters = None
if device:
try:
req_prefix, req_letters = block_device.match_device(device)
except (TypeError, AttributeError, ValueError):
raise exception.InvalidDevicePath(path=device)
bdms = db.block_device_mapping_get_all_by_instance(context,
instance['uuid'])
mappings = block_device.instance_block_mapping(instance, bdms)
try:
prefix = block_device.match_device(mappings['root'])[0]
except (TypeError, AttributeError, ValueError):
raise exception.InvalidDevicePath(path=mappings['root'])
if req_prefix != prefix:
LOG.debug(_("Using %(prefix)s instead of %(req_prefix)s") % locals())
letters_list = []
for _name, device in mappings.iteritems():
letter = block_device.strip_prefix(device)
# NOTE(vish): delete numbers in case we have something like
# /dev/sda1
letter = re.sub("\d+", "", letter)
letters_list.append(letter)
used_letters = set(letters_list)
if not req_letters:
req_letters = _get_unused_letters(used_letters)
if req_letters in used_letters:
raise exception.DevicePathInUse(path=device)
return prefix + req_letters
def attach_volume(self, context, instance, volume_id, device=None):
"""Attach an existing volume to an existing instance."""
if device and not block_device.match_device(device):
raise exception.InvalidDevicePath(path=device)
try:
volume = self.volume_api.get(context, volume_id)
self.volume_api.check_attach(context, volume, instance=instance)
except Exception:
with excutils.save_and_reraise_exception():
self.db.block_device_mapping_destroy_by_instance_and_device(
context, instance['uuid'], device)
return self._call_to_cells(context, instance, 'attach_volume',
volume_id, device)
def attach_volume(self, context, instance, volume_id, device=None):
"""Attach an existing volume to an existing instance."""
if device and not block_device.match_device(device):
raise exception.InvalidDevicePath(path=device)
try:
volume = self.volume_api.get(context, volume_id)
self.volume_api.check_attach(context, volume, instance=instance)
except Exception:
with excutils.save_and_reraise_exception():
self.db.block_device_mapping_destroy_by_instance_and_device(
context, instance['uuid'], device)
return self._call_to_cells(context, instance, 'attach_volume',
volume_id, device)
def get_device_name_for_instance(context, instance, device):
"""Validates (or generates) a device name for instance.
If device is not set, it will generate a unique device appropriate
for the instance. It uses the block device mapping table to find
valid device names. If the device name is valid but applicable to
a different backend (for example /dev/vdc is specified but the
backend uses /dev/xvdc), the device name will be converted to the
appropriate format.
"""
req_prefix = None
req_letters = None
if device:
try:
req_prefix, req_letters = block_device.match_device(device)
except (TypeError, AttributeError, ValueError):
raise exception.InvalidDevicePath(path=device)
bdms = db.block_device_mapping_get_all_by_instance(context,
instance['uuid'])
mappings = block_device.instance_block_mapping(instance, bdms)
try:
prefix = block_device.match_device(mappings['root'])[0]
except (TypeError, AttributeError, ValueError):
raise exception.InvalidDevicePath(path=mappings['root'])
if req_prefix != prefix:
LOG.debug(_("Using %(prefix)s instead of %(req_prefix)s") % locals())
letters_list = []
for _name, device in mappings.iteritems():
letter = block_device.strip_prefix(device)
# NOTE(vish): delete numbers in case we have something like
# /dev/sda1
letter = re.sub("\d+", "", letter)
letters_list.append(letter)
used_letters = set(letters_list)
if not req_letters:
req_letters = _get_unused_letters(used_letters)
if req_letters in used_letters:
raise exception.DevicePathInUse(path=device)
return prefix + req_letters
def attach_volume(self, context, instance, volume_id, device=None):
"""Attach an existing volume to an existing instance."""
if device and not block_device.match_device(device):
raise exception.InvalidDevicePath(path=device)
device = self.compute_rpcapi.reserve_block_device_name(
context, device=device, instance=instance, volume_id=volume_id
)
try:
volume = self.volume_api.get(context, volume_id)
self.volume_api.check_attach(context, volume, instance=instance)
except Exception:
with excutils.save_and_reraise_exception():
self.db.block_device_mapping_destroy_by_instance_and_device(context, instance["uuid"], device)
self._cast_to_cells(context, instance, "attach_volume", volume_id, device)
def attach_volume(self,
context,
instance,
volume_id,
device=None,
disk_bus=None,
device_type=None):
"""Attach an existing volume to an existing instance."""
if device and not block_device.match_device(device):
raise exception.InvalidDevicePath(path=device)
volume = self.volume_api.get(context, volume_id)
self.volume_api.check_attach(context, volume, instance=instance)
return self._call_to_cells(context, instance, 'attach_volume',
volume_id, device, disk_bus, device_type)
def get_next_device_name(instance,
device_name_list,
root_device_name=None,
device=None):
"""Validates (or generates) a device name for instance.
If device is not set, it will generate a unique device appropriate
for the instance. It uses the root_device_name (if provided) and
the list of used devices to find valid device names. If the device
name is valid but applicable to a different backend (for example
/dev/vdc is specified but the backend uses /dev/xvdc), the device
name will be converted to the appropriate format.
"""
req_prefix = None
req_letter = None
if device:
try:
req_prefix, req_letter = block_device.match_device(device)
except (TypeError, AttributeError, ValueError):
raise exception.InvalidDevicePath(path=device)
if not root_device_name:
root_device_name = block_device.DEFAULT_ROOT_DEV_NAME
try:
prefix = block_device.match_device(root_device_name)[0]
except (TypeError, AttributeError, ValueError):
raise exception.InvalidDevicePath(path=root_device_name)
# NOTE(vish): remove this when xenapi is setting default_root_device
if driver.compute_driver_matches('xenapi.XenAPIDriver'):
prefix = '/dev/xvd'
if req_prefix != prefix:
LOG.debug(_("Using %(prefix)s instead of %(req_prefix)s"), {
'prefix': prefix,
'req_prefix': req_prefix
})
used_letters = set()
for device_path in device_name_list:
letter = block_device.strip_prefix(device_path)
# NOTE(vish): delete numbers in case we have something like
# /dev/sda1
letter = re.sub("\d+", "", letter)
used_letters.add(letter)
# NOTE(vish): remove this when xenapi is properly setting
# default_ephemeral_device and default_swap_device
if driver.compute_driver_matches('xenapi.XenAPIDriver'):
flavor = flavors.extract_flavor(instance)
if flavor['ephemeral_gb']:
used_letters.add('b')
if flavor['swap']:
used_letters.add('c')
if not req_letter:
req_letter = _get_unused_letter(used_letters)
if req_letter in used_letters:
raise exception.DevicePathInUse(path=device)
return prefix + req_letter