def test_symlink_is_removed_on_scope_exit(self):
runner = mock.Mock()
target = "/tmp/filename"
symlink = "_symlink"
with files.RemoteSymlink(runner, target, symlink):
pass
self.assertCalledOnce(runner.run)
self.assertCalledOnce(runner.run_ignoring_errors)
def test_symlink_does_nothing_if_target_file_is_none(self):
runner = mock.Mock()
target = None
symlink = "_symlink"
with files.RemoteSymlink(runner, target, symlink):
pass
runner.run.assert_not_called()
runner.run_ignoring_errors.assert_not_called()
def run(self, info=None, **kwargs):
new_id, instance = list(info[utils.INSTANCES_TYPE].items())[0]
old_id = instance['old_id']
dst_compute = self.dst_cloud.resources[utils.COMPUTE_RESOURCE]
src_compute = self.src_cloud.resources[utils.COMPUTE_RESOURCE]
dst_compute.change_status('active', instance_id=new_id)
dst_instance = dst_compute.get_instance(new_id)
src_instance = src_compute.get_instance(old_id)
# do not attempt to live migrate inactive instances
if src_instance.status.lower() not in ['active', 'verify_resize']:
LOG.debug(
"Skipping live migration of VM '%s', because it's "
"inactive", src_instance.name)
return
src_host = instance_host(src_instance)
dst_host = instance_host(dst_instance)
src_runner = remote_runner.RemoteRunner(src_host, CONF.src.ssh_user)
dst_runner = remote_runner.RemoteRunner(dst_host, CONF.dst.ssh_user)
src_libvirt = libvirt.Libvirt(src_runner)
dst_libvirt = libvirt.Libvirt(dst_runner)
src_virsh_name = instance_libvirt_name(src_instance)
dst_virsh_name = instance_libvirt_name(dst_instance)
src_vm_xml = src_libvirt.get_xml(src_virsh_name)
dst_vm_xml = dst_libvirt.get_xml(dst_virsh_name)
src_vm_xml.disk_file = dst_vm_xml.disk_file
src_vm_xml.serial_file = dst_vm_xml.serial_file
src_vm_xml.console_file = dst_vm_xml.console_file
src_vm_xml.interfaces = dst_vm_xml.interfaces
dst_backing_file = dst_libvirt.get_backing_file(new_id)
src_backing_file = src_libvirt.get_backing_file(old_id)
migration_backing_file = os.path.join(
libvirt.nova_instances_path, '_base',
'migration_disk_{}'.format(old_id))
timeout = CONF.migrate.boot_timeout
dst_compute.wait_for_status(new_id,
dst_compute.get_status,
'active',
timeout=timeout)
with files.RemoteTempFile(src_runner,
"migrate-{}".format(old_id),
src_vm_xml.dump()) as migration_file,\
files.RemoteSymlink(src_runner,
src_backing_file,
migration_backing_file),\
files.RemoteSymlink(dst_runner,
dst_backing_file,
migration_backing_file),\
ubuntu.StopNovaCompute(dst_runner),\
libvirt.QemuBackingFileMover(src_libvirt.runner,
migration_backing_file,
old_id):
destroyer = libvirt.DestNovaInstanceDestroyer(
dst_libvirt, dst_compute, dst_virsh_name, dst_instance.id)
try:
destroyer.do()
src_libvirt.live_migrate(src_virsh_name, dst_host,
migration_file.filename)
except remote_runner.RemoteExecutionError:
destroyer.undo()
finally:
dst_libvirt.move_backing_file(dst_backing_file, new_id)