86 lines
2.9 KiB
Python
Executable file
86 lines
2.9 KiB
Python
Executable file
#!/usr/bin/env python3
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# group: rw migration quick
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#
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# Copyright (C) 2019 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: Kevin Wolf <kwolf@redhat.com>
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#
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# Test migration to file for taking an external snapshot with VM state.
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import iotests
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import os
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iotests.script_initialize(
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supported_fmts=['qcow2'],
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supported_protocols=['file'],
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supported_platforms=['linux'],
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)
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with iotests.FilePath('base') as base_path , \
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iotests.FilePath('top') as top_path, \
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iotests.VM() as vm:
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iotests.qemu_img_create('-f', iotests.imgfmt, base_path, '64M')
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iotests.log('=== Launch VM ===')
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vm.add_object('iothread,id=iothread0')
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vm.add_blockdev('file,filename=%s,node-name=base-file' % (base_path))
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vm.add_blockdev('%s,file=base-file,node-name=base-fmt' % (iotests.imgfmt))
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vm.add_device('virtio-blk,drive=base-fmt,iothread=iothread0,id=vda')
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vm.launch()
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vm.enable_migration_events('VM')
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iotests.log('\n=== Migrate to file ===')
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vm.qmp_log('migrate', uri='exec:cat > /dev/null')
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with iotests.Timeout(3, 'Migration does not complete'):
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vm.wait_migration('postmigrate')
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iotests.log('\nVM is now stopped:')
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iotests.log(vm.qmp('query-migrate')['return']['status'])
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vm.qmp_log('query-status')
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iotests.log('\n=== Create a snapshot of the disk image ===')
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vm.blockdev_create({
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'driver': 'file',
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'filename': top_path,
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'size': 0,
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})
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vm.qmp_log('blockdev-add', node_name='top-file',
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driver='file', filename=top_path,
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filters=[iotests.filter_qmp_testfiles])
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vm.blockdev_create({
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'driver': iotests.imgfmt,
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'file': 'top-file',
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'size': 1024 * 1024,
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})
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vm.qmp_log('blockdev-add', node_name='top-fmt',
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driver=iotests.imgfmt, file='top-file')
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vm.qmp_log('blockdev-snapshot', node='base-fmt', overlay='top-fmt')
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iotests.log('\n=== Resume the VM and simulate a write request ===')
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vm.qmp_log('cont')
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iotests.log(vm.hmp_qemu_io('-d vda/virtio-backend', 'write 4k 4k'))
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iotests.log('\n=== Commit it to the backing file ===')
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result = vm.qmp_log('block-commit', job_id='job0', auto_dismiss=False,
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device='top-fmt', top_node='top-fmt',
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filters=[iotests.filter_qmp_testfiles])
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if 'return' in result:
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vm.run_job('job0')
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