def get_config(self, connection_info, disk_info):
"""Returns xml for libvirt."""
conf = vconfig.LibvirtConfigGuestDisk()
conf.driver_name = libvirt_utils.pick_disk_driver_name(
self.connection._host.get_version(), self.is_block_dev)
conf.source_device = disk_info['type']
conf.driver_format = "raw"
conf.driver_cache = "none"
conf.target_dev = disk_info['dev']
conf.target_bus = disk_info['bus']
conf.serial = connection_info.get('serial')
# Support for block size tuning
data = {}
if 'data' in connection_info:
data = connection_info['data']
if 'logical_block_size' in data:
conf.logical_block_size = data['logical_block_size']
if 'physical_block_size' in data:
conf.physical_block_size = data['physical_block_size']
# Extract rate_limit control parameters
if 'qos_specs' in data and data['qos_specs']:
tune_opts = [
'total_bytes_sec', 'read_bytes_sec', 'write_bytes_sec',
'total_iops_sec', 'read_iops_sec', 'write_iops_sec'
]
specs = data['qos_specs']
if isinstance(specs, dict):
for k, v in six.iteritems(specs):
if k in tune_opts:
new_key = 'disk_' + k
setattr(conf, new_key, v)
else:
LOG.warn(
_LW('Unknown content in connection_info/'
'qos_specs: %s'), specs)
# TODO(jahei): Maybe we should add a shareable flag to
# the volume. But I am not sure whether we need it. In
# my test, it is ok without this flag. Let's get back to
# this part when something goes wrong.
# Extract access_mode control parameters
if 'access_mode' in data and data['access_mode']:
access_mode = data['access_mode']
if access_mode in ('ro', 'rw'):
conf.readonly = access_mode == 'ro'
else:
LOG.error(
_LE('Unknown content in '
'connection_info/access_mode: %s'), access_mode)
raise exception.InvalidVolumeAccessMode(
access_mode=access_mode)
return conf
def get_config(self, connection_info, disk_info):
"""Returns xml for libvirt."""
conf = vconfig.LibvirtConfigGuestDisk()
conf.source_device = disk_info['type']
conf.driver_format = "raw"
conf.driver_cache = "none"
conf.target_dev = disk_info['dev']
conf.target_bus = disk_info['bus']
conf.serial = connection_info.get('serial')
if CONF.libvirt.virt_type in ('qemu', 'kvm'):
# the QEMU backend supports multiple backends, so tell libvirt
# which one to use
conf.driver_name = 'qemu'
# Support for block size tuning
data = {}
if 'data' in connection_info:
data = connection_info['data']
if 'logical_block_size' in data:
conf.logical_block_size = data['logical_block_size']
if 'physical_block_size' in data:
conf.physical_block_size = data['physical_block_size']
# Extract rate_limit control parameters
if 'qos_specs' in data and data['qos_specs']:
tune_opts = [
'total_bytes_sec', 'read_bytes_sec', 'write_bytes_sec',
'total_iops_sec', 'read_iops_sec', 'write_iops_sec',
'read_bytes_sec_max', 'read_iops_sec_max',
'write_bytes_sec_max', 'write_iops_sec_max',
'total_bytes_sec_max', 'total_iops_sec_max', 'size_iops_sec'
]
specs = data['qos_specs']
if isinstance(specs, dict):
for k, v in specs.items():
if k in tune_opts:
new_key = 'disk_' + k
setattr(conf, new_key, v)
else:
LOG.warning(
'Unknown content in connection_info/'
'qos_specs: %s', specs)
# Extract access_mode control parameters
if 'access_mode' in data and data['access_mode']:
access_mode = data['access_mode']
if access_mode in ('ro', 'rw'):
conf.readonly = access_mode == 'ro'
else:
LOG.error(
'Unknown content in '
'connection_info/access_mode: %s', access_mode)
raise exception.InvalidVolumeAccessMode(
access_mode=access_mode)
# Configure usage of discard
if data.get('discard', False) is True:
conf.driver_discard = 'unmap'
# NOTE(melwitt): We set the device address unit number manually in the
# case of the virtio-scsi controller, in order to allow attachment of
# up to 256 devices. So, we should only be setting the address tag
# if we intend to set the unit number. Otherwise, we will let libvirt
# handle autogeneration of the address tag.
# See https://bugs.launchpad.net/nova/+bug/1792077 for details.
if disk_info['bus'] == 'scsi' and 'unit' in disk_info:
# The driver is responsible to create the SCSI controller
# at index 0.
conf.device_addr = vconfig.LibvirtConfigGuestDeviceAddressDrive()
conf.device_addr.controller = 0
# In order to allow up to 256 disks handled by one
# virtio-scsi controller, the device addr should be
# specified.
conf.device_addr.unit = disk_info['unit']
if connection_info.get('multiattach', False):
# Note that driver_cache should be disabled (none) when using
# a shareable disk.
conf.shareable = True
volume_id = driver_block_device.get_volume_id(connection_info)
volume_secret = None
if volume_id:
volume_secret = self.host.find_secret('volume', volume_id)
if volume_secret:
conf.encryption = vconfig.LibvirtConfigGuestDiskEncryption()
secret = vconfig.LibvirtConfigGuestDiskEncryptionSecret()
secret.type = 'passphrase'
secret.uuid = volume_secret.UUIDString()
conf.encryption.format = 'luks'
conf.encryption.secret = secret
return conf
