def volume_in_mapping(self, mount_device, block_device_info):
block_device_list = [block_device.strip_dev(vol['mount_device'])
for vol in
driver.block_device_info_get_mapping(
block_device_info)]
swap = driver.block_device_info_get_swap(block_device_info)
if driver.swap_is_usable(swap):
block_device_list.append(
block_device.strip_dev(swap['device_name']))
block_device_list += [block_device.strip_dev(
ephemeral['device_name'])
for ephemeral in
driver.block_device_info_get_ephemerals(block_device_info)]
LOG.debug("block_device_list %s", block_device_list)
return block_device.strip_dev(mount_device) in block_device_list
def get_root_info(virt_type, image_meta, root_bdm, disk_bus, cdrom_bus,
root_device_name=None):
# NOTE (ndipanov): This is a hack to avoid considering an image
# BDM with local target, as we don't support them
# yet. Only applies when passed non-driver format
no_root_bdm = (not root_bdm or (
root_bdm.get('source_type') == 'image' and
root_bdm.get('destination_type') == 'local'))
if no_root_bdm:
if image_meta.get('disk_format') == 'iso':
root_device_bus = cdrom_bus
root_device_type = 'cdrom'
else:
root_device_bus = disk_bus
root_device_type = 'disk'
if root_device_name:
root_device_bus = get_disk_bus_for_disk_dev(virt_type,
root_device_name)
else:
root_device_name = find_disk_dev_for_disk_bus({}, root_device_bus)
return {'bus': root_device_bus,
'type': root_device_type,
'dev': block_device.strip_dev(root_device_name),
'boot_index': '1'}
else:
if not get_device_name(root_bdm) and root_device_name:
root_bdm = root_bdm.copy()
root_bdm['device_name'] = root_device_name
return get_info_from_bdm(virt_type, image_meta,
root_bdm, {}, disk_bus)
def get_info_from_bdm(virt_type,
image_meta,
bdm,
mapping=None,
disk_bus=None,
dev_type=None,
allowed_types=None,
assigned_devices=None):
mapping = mapping or {}
allowed_types = allowed_types or SUPPORTED_DEVICE_TYPES
device_name = block_device.strip_dev(get_device_name(bdm))
bdm_type = bdm.get('device_type') or dev_type
if bdm_type not in allowed_types:
bdm_type = 'disk'
bdm_bus = bdm.get('disk_bus') or disk_bus
if not is_disk_bus_valid_for_virt(virt_type, bdm_bus):
if device_name:
bdm_bus = get_disk_bus_for_disk_dev(virt_type, device_name)
else:
bdm_bus = get_disk_bus_for_device_type(virt_type, image_meta,
bdm_type)
if not device_name:
if assigned_devices:
padded_mapping = {dev: {'dev': dev} for dev in assigned_devices}
padded_mapping.update(mapping)
else:
padded_mapping = mapping
device_name = find_disk_dev_for_disk_bus(padded_mapping, bdm_bus)
bdm_info = {'bus': bdm_bus, 'dev': device_name, 'type': bdm_type}
bdm_format = bdm.get('guest_format')
if bdm_format:
bdm_info.update({'format': bdm_format})
boot_index = bdm.get('boot_index')
if boot_index is not None and boot_index >= 0:
# NOTE(ndipanov): libvirt starts ordering from 1, not 0
bdm_info['boot_index'] = str(boot_index + 1)
return bdm_info
def get_info_from_bdm(virt_type, image_meta, bdm,
mapping=None, disk_bus=None,
dev_type=None, allowed_types=None,
assigned_devices=None):
mapping = mapping or {}
allowed_types = allowed_types or SUPPORTED_DEVICE_TYPES
device_name = block_device.strip_dev(get_device_name(bdm))
bdm_type = bdm.get('device_type') or dev_type
if bdm_type not in allowed_types:
bdm_type = 'disk'
bdm_bus = bdm.get('disk_bus') or disk_bus
if not is_disk_bus_valid_for_virt(virt_type, bdm_bus):
if device_name:
bdm_bus = get_disk_bus_for_disk_dev(virt_type, device_name)
else:
bdm_bus = get_disk_bus_for_device_type(virt_type, image_meta,
bdm_type)
if not device_name:
if assigned_devices:
padded_mapping = {dev: {'dev': dev} for dev in assigned_devices}
padded_mapping.update(mapping)
else:
padded_mapping = mapping
device_name = find_disk_dev_for_disk_bus(padded_mapping, bdm_bus)
bdm_info = {'bus': bdm_bus,
'dev': device_name,
'type': bdm_type}
bdm_format = bdm.get('guest_format')
if bdm_format:
bdm_info.update({'format': bdm_format})
boot_index = bdm.get('boot_index')
if boot_index is not None and boot_index >= 0:
# NOTE(ndipanov): libvirt starts ordering from 1, not 0
bdm_info['boot_index'] = str(boot_index + 1)
return bdm_info
def get_root_info(virt_type,
image_meta,
root_bdm,
disk_bus,
cdrom_bus,
root_device_name=None):
# NOTE (ndipanov): This is a hack to avoid considering an image
# BDM with local target, as we don't support them
# yet. Only applies when passed non-driver format
no_root_bdm = (not root_bdm
or (root_bdm.get('source_type') == 'image'
and root_bdm.get('destination_type') == 'local'))
if no_root_bdm:
if image_meta.get('disk_format') == 'iso':
root_device_bus = cdrom_bus
root_device_type = 'cdrom'
else:
root_device_bus = disk_bus
root_device_type = 'disk'
if root_device_name:
root_device_bus = get_disk_bus_for_disk_dev(
virt_type, root_device_name)
else:
root_device_name = find_disk_dev_for_disk_bus({}, root_device_bus)
return {
'bus': root_device_bus,
'type': root_device_type,
'dev': block_device.strip_dev(root_device_name),
'boot_index': '1'
}
else:
if not get_device_name(root_bdm) and root_device_name:
root_bdm = root_bdm.copy()
root_bdm['device_name'] = root_device_name
return get_info_from_bdm(virt_type, image_meta, root_bdm, {}, disk_bus)
def get_disk_mapping(virt_type,
instance,
disk_bus,
cdrom_bus,
image_meta,
block_device_info=None,
rescue=False):
"""Determine how to map default disks to the virtual machine.
This is about figuring out whether the default 'disk',
'disk.local', 'disk.swap' and 'disk.config' images have
been overridden by the block device mapping.
Returns the guest disk mapping for the devices.
"""
inst_type = instance.get_flavor()
mapping = {}
pre_assigned_device_names = \
[block_device.strip_dev(get_device_name(bdm)) for bdm in itertools.chain(
driver.block_device_info_get_ephemerals(block_device_info),
[driver.block_device_info_get_swap(block_device_info)],
driver.block_device_info_get_mapping(block_device_info))
if get_device_name(bdm)]
if rescue:
rescue_info = get_next_disk_info(mapping, disk_bus, boot_index=1)
mapping['disk.rescue'] = rescue_info
mapping['root'] = rescue_info
os_info = get_next_disk_info(mapping, disk_bus)
mapping['disk'] = os_info
return mapping
# NOTE (ndipanov): root_bdm can be None when we boot from image
# as there is no driver represenation of local targeted images
# and they will not be in block_device_info list.
root_bdm = block_device.get_root_bdm(
driver.block_device_info_get_mapping(block_device_info))
root_device_name = block_device.strip_dev(
driver.block_device_info_get_root(block_device_info))
root_info = get_root_info(virt_type, image_meta, root_bdm, disk_bus,
cdrom_bus, root_device_name)
mapping['root'] = root_info
# NOTE (ndipanov): This implicitly relies on image->local BDMs not
# being considered in the driver layer - so missing
# bdm with boot_index 0 means - use image, unless it was
# overridden. This can happen when using legacy syntax and
# no root_device_name is set on the instance.
if not root_bdm and not block_device.volume_in_mapping(
root_info['dev'], block_device_info):
mapping['disk'] = root_info
default_eph = has_default_ephemeral(instance, disk_bus, block_device_info,
mapping)
if default_eph:
mapping['disk.local'] = default_eph
for idx, eph in enumerate(
driver.block_device_info_get_ephemerals(block_device_info)):
eph_info = get_info_from_bdm(
virt_type,
image_meta,
eph,
mapping,
disk_bus,
assigned_devices=pre_assigned_device_names)
mapping[get_eph_disk(idx)] = eph_info
update_bdm(eph, eph_info)
swap = driver.block_device_info_get_swap(block_device_info)
if swap and swap.get('swap_size', 0) > 0:
swap_info = get_info_from_bdm(virt_type, image_meta, swap, mapping,
disk_bus)
mapping['disk.swap'] = swap_info
update_bdm(swap, swap_info)
elif inst_type['swap'] > 0:
swap_info = get_next_disk_info(mapping, disk_bus)
if not block_device.volume_in_mapping(swap_info['dev'],
block_device_info):
mapping['disk.swap'] = swap_info
block_device_mapping = driver.block_device_info_get_mapping(
block_device_info)
for vol in block_device_mapping:
vol_info = get_info_from_bdm(
virt_type,
image_meta,
vol,
mapping,
assigned_devices=pre_assigned_device_names)
mapping[block_device.prepend_dev(vol_info['dev'])] = vol_info
update_bdm(vol, vol_info)
if configdrive.required_by(instance):
device_type = get_config_drive_type()
disk_bus = get_disk_bus_for_device_type(virt_type,
image_meta,
device_type,
instance=instance)
config_info = get_next_disk_info(mapping,
disk_bus,
device_type,
last_device=True)
mapping['disk.config'] = config_info
return mapping
def test_strip_dev(self):
self.assertEqual(block_device.strip_dev('/dev/sda'), 'sda')
self.assertEqual(block_device.strip_dev('sda'), 'sda')
def get_disk_mapping(virt_type, instance,
disk_bus, cdrom_bus,
image_meta,
block_device_info=None,
rescue=False):
"""Determine how to map default disks to the virtual machine.
This is about figuring out whether the default 'disk',
'disk.local', 'disk.swap' and 'disk.config' images have
been overridden by the block device mapping.
Returns the guest disk mapping for the devices.
"""
inst_type = instance.get_flavor()
mapping = {}
pre_assigned_device_names = \
[block_device.strip_dev(get_device_name(bdm)) for bdm in itertools.chain(
driver.block_device_info_get_ephemerals(block_device_info),
[driver.block_device_info_get_swap(block_device_info)],
driver.block_device_info_get_mapping(block_device_info))
if get_device_name(bdm)]
if rescue:
rescue_info = get_next_disk_info(mapping,
disk_bus, boot_index=1)
mapping['disk.rescue'] = rescue_info
mapping['root'] = rescue_info
os_info = get_next_disk_info(mapping,
disk_bus)
mapping['disk'] = os_info
return mapping
# NOTE (ndipanov): root_bdm can be None when we boot from image
# as there is no driver represenation of local targeted images
# and they will not be in block_device_info list.
root_bdm = block_device.get_root_bdm(
driver.block_device_info_get_mapping(block_device_info))
root_device_name = block_device.strip_dev(
driver.block_device_info_get_root(block_device_info))
root_info = get_root_info(virt_type, image_meta, root_bdm,
disk_bus, cdrom_bus, root_device_name)
mapping['root'] = root_info
# NOTE (ndipanov): This implicitly relies on image->local BDMs not
# being considered in the driver layer - so missing
# bdm with boot_index 0 means - use image, unless it was
# overridden. This can happen when using legacy syntax and
# no root_device_name is set on the instance.
if not root_bdm and not block_device.volume_in_mapping(root_info['dev'],
block_device_info):
mapping['disk'] = root_info
default_eph = has_default_ephemeral(instance, disk_bus, block_device_info,
mapping)
if default_eph:
mapping['disk.local'] = default_eph
for idx, eph in enumerate(driver.block_device_info_get_ephemerals(
block_device_info)):
eph_info = get_info_from_bdm(
virt_type, image_meta, eph, mapping, disk_bus,
assigned_devices=pre_assigned_device_names)
mapping[get_eph_disk(idx)] = eph_info
update_bdm(eph, eph_info)
swap = driver.block_device_info_get_swap(block_device_info)
if swap and swap.get('swap_size', 0) > 0:
swap_info = get_info_from_bdm(virt_type, image_meta,
swap, mapping, disk_bus)
mapping['disk.swap'] = swap_info
update_bdm(swap, swap_info)
elif inst_type['swap'] > 0:
swap_info = get_next_disk_info(mapping,
disk_bus)
if not block_device.volume_in_mapping(swap_info['dev'],
block_device_info):
mapping['disk.swap'] = swap_info
block_device_mapping = driver.block_device_info_get_mapping(
block_device_info)
for vol in block_device_mapping:
vol_info = get_info_from_bdm(
virt_type, image_meta, vol, mapping,
assigned_devices=pre_assigned_device_names)
mapping[block_device.prepend_dev(vol_info['dev'])] = vol_info
update_bdm(vol, vol_info)
if configdrive.required_by(instance):
device_type = get_config_drive_type()
disk_bus = get_disk_bus_for_device_type(virt_type,
image_meta,
device_type,
instance=instance)
config_info = get_next_disk_info(mapping,
disk_bus,
device_type,
last_device=True)
mapping['disk.config'] = config_info
return mapping
