f62f08ab7a
This tests creating an external snapshot with VM state (which results in an active overlay over an inactive backing file, which is also the root node of an inactive BlockBackend), re-activating the images and performing some operations to test that the re-activation worked as intended. Signed-off-by: Kevin Wolf <kwolf@redhat.com>
84 lines
2.9 KiB
Python
Executable file
84 lines
2.9 KiB
Python
Executable file
#!/usr/bin/env python
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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.verify_image_format(supported_fmts=['qcow2'])
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iotests.verify_protocol(supported=['file'])
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iotests.verify_platform(['linux'])
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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_log('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()
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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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