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1 #!/usr/bin/env python3 2 # group: rw migration quick 3 # 4 # Copyright (C) 2019 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: Kevin Wolf <kwolf@redhat.com> 20 # 21 # Test migration to file for taking an external snapshot with VM state. 22 23 import iotests 24 import os 25 26 iotests.script_initialize( 27 supported_fmts=['qcow2'], 28 supported_protocols=['file'], 29 supported_platforms=['linux'], 30 ) 31 32 with iotests.FilePath('base') as base_path , \ 33 iotests.FilePath('top') as top_path, \ 34 iotests.VM() as vm: 35 36 iotests.qemu_img_create('-f', iotests.imgfmt, base_path, '64M') 37 38 iotests.log('=== Launch VM ===') 39 vm.add_object('iothread,id=iothread0') 40 vm.add_blockdev('file,filename=%s,node-name=base-file' % (base_path)) 41 vm.add_blockdev('%s,file=base-file,node-name=base-fmt' % (iotests.imgfmt)) 42 vm.add_device('virtio-blk,drive=base-fmt,iothread=iothread0,id=vda') 43 vm.launch() 44 45 vm.enable_migration_events('VM') 46 47 iotests.log('\n=== Migrate to file ===') 48 vm.qmp_log('migrate', uri='exec:cat > /dev/null') 49 50 with iotests.Timeout(3, 'Migration does not complete'): 51 vm.wait_migration('postmigrate') 52 53 iotests.log('\nVM is now stopped:') 54 iotests.log(vm.qmp('query-migrate')['return']['status']) 55 vm.qmp_log('query-status') 56 57 iotests.log('\n=== Create a snapshot of the disk image ===') 58 vm.blockdev_create({ 59 'driver': 'file', 60 'filename': top_path, 61 'size': 0, 62 }) 63 vm.qmp_log('blockdev-add', node_name='top-file', 64 driver='file', filename=top_path, 65 filters=[iotests.filter_qmp_testfiles]) 66 67 vm.blockdev_create({ 68 'driver': iotests.imgfmt, 69 'file': 'top-file', 70 'size': 1024 * 1024, 71 }) 72 vm.qmp_log('blockdev-add', node_name='top-fmt', 73 driver=iotests.imgfmt, file='top-file') 74 75 vm.qmp_log('blockdev-snapshot', node='base-fmt', overlay='top-fmt') 76 77 iotests.log('\n=== Resume the VM and simulate a write request ===') 78 vm.qmp_log('cont') 79 iotests.log(vm.hmp_qemu_io('-d vda/virtio-backend', 'write 4k 4k')) 80 81 iotests.log('\n=== Commit it to the backing file ===') 82 result = vm.qmp_log('block-commit', job_id='job0', auto_dismiss=False, 83 device='top-fmt', top_node='top-fmt', 84 filters=[iotests.filter_qmp_testfiles]) 85 if 'return' in result: 86 vm.run_job('job0')