#!/usr/bin/env python3
# group: rw migration quick
#
# Copyright (C) 2017 Red Hat, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# Creator/Owner: Stefan Hajnoczi <stefanha@redhat.com>
#
# Non-shared storage migration test using NBD server and drive-mirror
import iotests
iotests.script_initialize(supported_fmts=['qcow2', 'qed', 'raw'],
supported_platforms=['linux'])
with iotests.FilePath('source.img') as source_img_path, \
iotests.FilePath('dest.img') as dest_img_path, \
iotests.FilePath('migration.sock', 'nbd.sock', base_dir=iotests.sock_dir) \
as (migration_sock_path, nbd_sock_path), \
iotests.VM('source') as source_vm, \
iotests.VM('dest') as dest_vm:
img_size = '1G'
iotests.qemu_img_pipe('create', '-f', iotests.imgfmt, source_img_path, img_size)
iotests.qemu_img_pipe('create', '-f', iotests.imgfmt, dest_img_path, img_size)
iotests.log('Launching VMs...')
(source_vm.add_drive(source_img_path)
.launch())
(dest_vm.add_drive(dest_img_path)
.add_incoming('unix:{0}'.format(migration_sock_path))
.launch())
source_vm.qmp_log('block-dirty-bitmap-add', node='drive0', name='bitmap0')
iotests.log('Launching NBD server on destination...')
iotests.log(dest_vm.qmp('nbd-server-start', addr={'type': 'unix', 'data': {'path': nbd_sock_path}}))
iotests.log(dest_vm.qmp('nbd-server-add', device='drive0', writable=True))
iotests.log('Starting `drive-mirror` on source...')
iotests.log(source_vm.qmp(
'drive-mirror',
device='drive0',
target='nbd+unix:///drive0?socket={0}'.format(nbd_sock_path),
sync='full',
format='raw', # always raw, the server handles the format
mode='existing',
job_id='mirror-job0'))
iotests.log('Waiting for `drive-mirror` to complete...')
iotests.log(source_vm.event_wait('BLOCK_JOB_READY'),
filters=[iotests.filter_qmp_event])
iotests.log('Starting migration...')
capabilities = [{'capability': 'events', 'state': True},
{'capability': 'dirty-bitmaps', 'state': True}]
source_vm.qmp('migrate-set-capabilities', capabilities=capabilities)
dest_vm.qmp('migrate-set-capabilities', capabilities=capabilities)
iotests.log(source_vm.qmp('migrate', uri='unix:{0}'.format(migration_sock_path)))
source_vm.qmp_log('migrate-start-postcopy')
while True:
event1 = source_vm.event_wait('MIGRATION')
iotests.log(event1, filters=[iotests.filter_qmp_event])
if event1['data']['status'] in ('completed', 'failed'):
iotests.log('Gracefully ending the `drive-mirror` job on source...')
iotests.log(source_vm.qmp('block-job-cancel', device='mirror-job0'))
break
while True:
event2 = source_vm.event_wait('BLOCK_JOB_COMPLETED')
iotests.log(event2, filters=[iotests.filter_qmp_event])
if event2['event'] == 'BLOCK_JOB_COMPLETED':
iotests.log('Stopping the NBD server on destination...')
iotests.log(dest_vm.qmp('nbd-server-stop'))
break
iotests.log('Wait for migration completion on target...')
migr_events = (('MIGRATION', {'data': {'status': 'completed'}}),
('MIGRATION', {'data': {'status': 'failed'}}))
event = dest_vm.events_wait(migr_events)
iotests.log(event, filters=[iotests.filter_qmp_event])
iotests.log('Check bitmaps on source:')
iotests.log(source_vm.qmp('query-block')['return'][0]['dirty-bitmaps'])
iotests.log('Check bitmaps on target:')
iotests.log(dest_vm.qmp('query-block')['return'][0]['dirty-bitmaps'])
