qemu

FORK: QEMU emulator
git clone https://git.neptards.moe/neptards/qemu.git
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      1 #!/usr/bin/env python3
      2 # group: rw migration quick
      3 #
      4 # Copyright (C) 2017 Red Hat, Inc.
      5 #
      6 # This program is free software; you can redistribute it and/or modify
      7 # it under the terms of the GNU General Public License as published by
      8 # the Free Software Foundation; either version 2 of the License, or
      9 # (at your option) any later version.
     10 #
     11 # This program is distributed in the hope that it will be useful,
     12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
     13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     14 # GNU General Public License for more details.
     15 #
     16 # You should have received a copy of the GNU General Public License
     17 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
     18 #
     19 # Creator/Owner: Stefan Hajnoczi <stefanha@redhat.com>
     20 #
     21 # Non-shared storage migration test using NBD server and drive-mirror
     22 
     23 import iotests
     24 
     25 iotests.script_initialize(supported_fmts=['qcow2', 'qed', 'raw'],
     26                           supported_platforms=['linux'])
     27 
     28 with iotests.FilePath('source.img') as source_img_path, \
     29      iotests.FilePath('dest.img') as dest_img_path, \
     30      iotests.FilePath('migration.sock', 'nbd.sock', base_dir=iotests.sock_dir) \
     31         as (migration_sock_path, nbd_sock_path), \
     32      iotests.VM('source') as source_vm, \
     33      iotests.VM('dest') as dest_vm:
     34 
     35     img_size = '1G'
     36     iotests.qemu_img_create('-f', iotests.imgfmt, source_img_path, img_size)
     37     iotests.qemu_img_create('-f', iotests.imgfmt, dest_img_path, img_size)
     38 
     39     iotests.log('Launching VMs...')
     40     (source_vm.add_drive(source_img_path)
     41               .launch())
     42     (dest_vm.add_drive(dest_img_path)
     43             .add_incoming('unix:{0}'.format(migration_sock_path))
     44             .launch())
     45 
     46     source_vm.qmp_log('block-dirty-bitmap-add', node='drive0', name='bitmap0')
     47 
     48     iotests.log('Launching NBD server on destination...')
     49     iotests.log(dest_vm.qmp('nbd-server-start', addr={'type': 'unix', 'data': {'path': nbd_sock_path}}))
     50     iotests.log(dest_vm.qmp('nbd-server-add', device='drive0', writable=True))
     51 
     52     iotests.log('Starting `drive-mirror` on source...')
     53     iotests.log(source_vm.qmp(
     54                   'drive-mirror',
     55                   device='drive0',
     56                   target='nbd+unix:///drive0?socket={0}'.format(nbd_sock_path),
     57                   sync='full',
     58                   format='raw', # always raw, the server handles the format
     59                   mode='existing',
     60                   job_id='mirror-job0'))
     61 
     62     iotests.log('Waiting for `drive-mirror` to complete...')
     63     iotests.log(source_vm.event_wait('BLOCK_JOB_READY'),
     64                 filters=[iotests.filter_qmp_event])
     65 
     66     iotests.log('Starting migration...')
     67     capabilities = [{'capability': 'events', 'state': True},
     68                     {'capability': 'dirty-bitmaps', 'state': True}]
     69     source_vm.qmp('migrate-set-capabilities', capabilities=capabilities)
     70     dest_vm.qmp('migrate-set-capabilities', capabilities=capabilities)
     71     iotests.log(source_vm.qmp('migrate', uri='unix:{0}'.format(migration_sock_path)))
     72 
     73     source_vm.qmp_log('migrate-start-postcopy')
     74 
     75     while True:
     76         event1 = source_vm.event_wait('MIGRATION')
     77         iotests.log(event1, filters=[iotests.filter_qmp_event])
     78         if event1['data']['status'] in ('completed', 'failed'):
     79             iotests.log('Gracefully ending the `drive-mirror` job on source...')
     80             iotests.log(source_vm.qmp('block-job-cancel', device='mirror-job0'))
     81             break
     82 
     83     while True:
     84         event2 = source_vm.event_wait('BLOCK_JOB_COMPLETED')
     85         iotests.log(event2, filters=[iotests.filter_qmp_event])
     86         if event2['event'] == 'BLOCK_JOB_COMPLETED':
     87             iotests.log('Stopping the NBD server on destination...')
     88             iotests.log(dest_vm.qmp('nbd-server-stop'))
     89             break
     90 
     91     iotests.log('Wait for migration completion on target...')
     92     migr_events = (('MIGRATION', {'data': {'status': 'completed'}}),
     93                    ('MIGRATION', {'data': {'status': 'failed'}}))
     94     event = dest_vm.events_wait(migr_events)
     95     iotests.log(event, filters=[iotests.filter_qmp_event])
     96 
     97     iotests.log('Check bitmaps on source:')
     98     iotests.log(source_vm.qmp('query-block')['return'][0]['inserted']['dirty-bitmaps'])
     99 
    100     iotests.log('Check bitmaps on target:')
    101     iotests.log(dest_vm.qmp('query-block')['return'][0]['inserted']['dirty-bitmaps'])