def test_attach_volume(self):
vol_dvr = mock.Mock(connection_info={'data': {'volume_id': '1'}})
task = tf_stg.AttachVolume(vol_dvr)
task.execute()
vol_dvr.attach_volume.assert_called_once_with()
task.revert('result', 'flow failures')
vol_dvr.reset_stg_ftsk.assert_called_once_with()
vol_dvr.detach_volume.assert_called_once_with()
# Validate args on taskflow.task.Task instantiation
with mock.patch('taskflow.task.Task.__init__') as tf:
tf_stg.AttachVolume(vol_dvr)
tf.assert_called_once_with(name='attach_vol_1')
def attach_volume(self, context, connection_info, instance, mountpoint,
disk_bus=None, device_type=None, encryption=None):
"""Attach the volume to the instance using the connection_info.
:param context: security context
:param connection_info: Volume connection information from the block
device mapping
:param instance: nova.objects.instance.Instance
:param mountpoint: Unused
:param disk_bus: Unused
:param device_type: Unused
:param encryption: Unused
"""
self._log_operation('attach_volume', instance)
# Define the flow
flow = tf_lf.Flow("attach_volume")
# Build the driver
vol_drv = volume.build_volume_driver(self.adapter, instance,
connection_info)
# Add the volume attach to the flow.
flow.add(tf_stg.AttachVolume(vol_drv))
# Run the flow
tf_base.run(flow, instance=instance)
# The volume connector may have updated the system metadata. Save
# the instance to persist the data. Spawn/destroy auto saves instance,
# but the attach does not. Detach does not need this save - as the
# detach flows do not (currently) modify system metadata. May need
# to revise in the future as volume connectors evolve.
instance.save()
def spawn(self,
context,
instance,
image_meta,
injected_files,
admin_password,
allocations,
network_info=None,
block_device_info=None,
power_on=True,
accel_info=None):
"""Create a new instance/VM/domain on the virtualization platform.
Once this successfully completes, the instance should be
running (power_state.RUNNING).
If this fails, any partial instance should be completely
cleaned up, and the virtualization platform should be in the state
that it was before this call began.
:param context: security context
:param instance: nova.objects.instance.Instance
This function should use the data there to guide
the creation of the new instance.
:param nova.objects.ImageMeta image_meta:
The metadata of the image of the instance.
:param injected_files: User files to inject into instance.
:param admin_password: Administrator password to set in instance.
:param allocations: Information about resources allocated to the
instance via placement, of the form returned by
SchedulerReportClient.get_allocations_for_consumer.
:param network_info: instance network information
:param block_device_info: Information about block devices to be
attached to the instance.
:param power_on: True if the instance should be powered on, False
otherwise
"""
self._log_operation('spawn', instance)
# Define the flow
flow_spawn = tf_lf.Flow("spawn")
# This FeedTask accumulates VIOS storage connection operations to be
# run in parallel. Include both SCSI and fibre channel mappings for
# the scrubber.
stg_ftsk = pvm_par.build_active_vio_feed_task(
self.adapter, xag={pvm_const.XAG.VIO_SMAP, pvm_const.XAG.VIO_FMAP})
flow_spawn.add(
tf_vm.Create(self.adapter, self.host_wrapper, instance, stg_ftsk))
# Create a flow for the IO
flow_spawn.add(
tf_net.PlugVifs(self.virtapi, self.adapter, instance,
network_info))
flow_spawn.add(tf_net.PlugMgmtVif(self.adapter, instance))
# Create the boot image.
flow_spawn.add(
tf_stg.CreateDiskForImg(self.disk_dvr, context, instance,
image_meta))
# Connects up the disk to the LPAR
flow_spawn.add(
tf_stg.AttachDisk(self.disk_dvr, instance, stg_ftsk=stg_ftsk))
# Extract the block devices.
bdms = driver.block_device_info_get_mapping(block_device_info)
# Determine if there are volumes to connect. If so, add a connection
# for each type.
for bdm, vol_drv in self._vol_drv_iter(context,
instance,
bdms,
stg_ftsk=stg_ftsk):
# Connect the volume. This will update the connection_info.
flow_spawn.add(tf_stg.AttachVolume(vol_drv))
# If the config drive is needed, add those steps. Should be done
# after all the other I/O.
if configdrive.required_by(instance):
flow_spawn.add(
tf_stg.CreateAndConnectCfgDrive(self.adapter,
instance,
injected_files,
network_info,
stg_ftsk,
admin_pass=admin_password))
# Add the transaction manager flow at the end of the 'I/O
# connection' tasks. This will run all the connections in parallel.
flow_spawn.add(stg_ftsk)
# Last step is to power on the system.
flow_spawn.add(tf_vm.PowerOn(self.adapter, instance))
# Run the flow.
tf_base.run(flow_spawn, instance=instance)
