2c94e2714c
This is the follow-up patch that was discussed[*] as part of feedback to
qemu-iotest 194.
Changes in this patch:
- Supply 'job-id' parameter to `drive-mirror` invocation.
- Once migration completes, issue QMP `block-job-cancel` command on
the source QEMU to gracefully complete `drive-mirror` operation.
- Once the BLOCK_JOB_COMPLETED event is emitted, stop the NBD server
on the destination QEMU.
- Check for both the events: MIGRATION and BLOCK_JOB_COMPLETED.
With the above, the test will also be (almost) in sync with the
procedure outlined in the document 'live-block-operations.rst'[+]
(section: "QMP invocation for live storage migration with
``drive-mirror`` + NBD").
[*] https://lists.nongnu.org/archive/html/qemu-devel/2017-08/msg04820.html
-- qemu-iotests: add 194 non-shared storage migration test
[+] https://git.qemu.org/gitweb.cgi?p=qemu.git;a=blob;f=docs/interop/live-block-operations.rst
Signed-off-by: Kashyap Chamarthy <kchamart@redhat.com>
Message-Id: <20170829165058.8229-1-kchamart@redhat.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
85 lines
3.4 KiB
Python
Executable File
85 lines
3.4 KiB
Python
Executable File
#!/usr/bin/env python
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#
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# Copyright (C) 2017 Red Hat, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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# Creator/Owner: Stefan Hajnoczi <stefanha@redhat.com>
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#
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# Non-shared storage migration test using NBD server and drive-mirror
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import os
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import atexit
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import iotests
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iotests.verify_platform(['linux'])
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img_size = '1G'
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source_img_path = os.path.join(iotests.test_dir, 'source.img')
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dest_img_path = os.path.join(iotests.test_dir, 'dest.img')
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iotests.qemu_img_pipe('create', '-f', iotests.imgfmt, source_img_path, img_size)
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iotests.qemu_img_pipe('create', '-f', iotests.imgfmt, dest_img_path, img_size)
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iotests.log('Launching VMs...')
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migration_sock_path = os.path.join(iotests.test_dir, 'migration.sock')
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nbd_sock_path = os.path.join(iotests.test_dir, 'nbd.sock')
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source_vm = iotests.VM('source').add_drive(source_img_path)
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dest_vm = (iotests.VM('dest').add_drive(dest_img_path)
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.add_incoming('unix:{0}'.format(migration_sock_path)))
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source_vm.launch()
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atexit.register(source_vm.shutdown)
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dest_vm.launch()
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atexit.register(dest_vm.shutdown)
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iotests.log('Launching NBD server on destination...')
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iotests.log(dest_vm.qmp('nbd-server-start', addr={'type': 'unix', 'data': {'path': nbd_sock_path}}))
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iotests.log(dest_vm.qmp('nbd-server-add', device='drive0', writable=True))
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iotests.log('Starting `drive-mirror` on source...')
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iotests.log(source_vm.qmp(
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'drive-mirror',
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device='drive0',
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target='nbd+unix:///drive0?socket={0}'.format(nbd_sock_path),
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sync='full',
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format='raw', # always raw, the server handles the format
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mode='existing',
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job_id='mirror-job0'))
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iotests.log('Waiting for `drive-mirror` to complete...')
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iotests.log(source_vm.event_wait('BLOCK_JOB_READY'),
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filters=[iotests.filter_qmp_event])
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iotests.log('Starting migration...')
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source_vm.qmp('migrate-set-capabilities',
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capabilities=[{'capability': 'events', 'state': True}])
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dest_vm.qmp('migrate-set-capabilities',
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capabilities=[{'capability': 'events', 'state': True}])
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iotests.log(source_vm.qmp('migrate', uri='unix:{0}'.format(migration_sock_path)))
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while True:
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event1 = source_vm.event_wait('MIGRATION')
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iotests.log(event1, filters=[iotests.filter_qmp_event])
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if event1['data']['status'] in ('completed', 'failed'):
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iotests.log('Gracefully ending the `drive-mirror` job on source...')
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iotests.log(source_vm.qmp('block-job-cancel', device='mirror-job0'))
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break
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while True:
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event2 = source_vm.event_wait('BLOCK_JOB_COMPLETED')
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iotests.log(event2, filters=[iotests.filter_qmp_event])
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if event2['event'] == 'BLOCK_JOB_COMPLETED':
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iotests.log('Stopping the NBD server on destination...')
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iotests.log(dest_vm.qmp('nbd-server-stop'))
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break
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