| 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 | require_hmp=True, |
| 31 | ) |
| 32 | |
| 33 | with iotests.FilePath('base') as base_path , \ |
| 34 | iotests.FilePath('top') as top_path, \ |
| 35 | iotests.VM() as vm: |
| 36 | |
| 37 | iotests.qemu_img_create('-f', iotests.imgfmt, base_path, '64M') |
| 38 | |
| 39 | iotests.log('=== Launch VM ===') |
| 40 | vm.add_object('iothread,id=iothread0') |
| 41 | vm.add_blockdev('file,filename=%s,node-name=base-file' % (base_path)) |
| 42 | vm.add_blockdev('%s,file=base-file,node-name=base-fmt' % (iotests.imgfmt)) |
| 43 | vm.add_device('virtio-blk,drive=base-fmt,iothread=iothread0,id=vda') |
| 44 | vm.launch() |
| 45 | |
| 46 | vm.enable_migration_events('VM') |
| 47 | |
| 48 | iotests.log('\n=== Migrate to file ===') |
| 49 | vm.qmp_log('migrate', uri='exec:cat > /dev/null') |
| 50 | |
| 51 | with iotests.Timeout(3, 'Migration does not complete'): |
| 52 | vm.wait_migration('postmigrate') |
| 53 | |
| 54 | iotests.log('\nVM is now stopped:') |
| 55 | iotests.log(vm.qmp('query-migrate')['return']['status']) |
| 56 | vm.qmp_log('query-status') |
| 57 | |
| 58 | iotests.log('\n=== Create a snapshot of the disk image ===') |
| 59 | vm.blockdev_create({ |
| 60 | 'driver': 'file', |
| 61 | 'filename': top_path, |
| 62 | 'size': 0, |
| 63 | }) |
| 64 | vm.qmp_log('blockdev-add', node_name='top-file', |
| 65 | driver='file', filename=top_path, |
| 66 | filters=[iotests.filter_qmp_testfiles]) |
| 67 | |
| 68 | vm.blockdev_create({ |
| 69 | 'driver': iotests.imgfmt, |
| 70 | 'file': 'top-file', |
| 71 | 'size': 1024 * 1024, |
| 72 | }) |
| 73 | vm.qmp_log('blockdev-add', node_name='top-fmt', |
| 74 | driver=iotests.imgfmt, file='top-file') |
| 75 | |
| 76 | vm.qmp_log('blockdev-snapshot', node='base-fmt', overlay='top-fmt') |
| 77 | |
| 78 | iotests.log('\n=== Resume the VM and simulate a write request ===') |
| 79 | vm.qmp_log('cont') |
| 80 | iotests.log(vm.hmp_qemu_io('-d vda/virtio-backend', 'write 4k 4k')) |
| 81 | |
| 82 | iotests.log('\n=== Commit it to the backing file ===') |
| 83 | result = vm.qmp_log('block-commit', job_id='job0', auto_dismiss=False, |
| 84 | device='top-fmt', top_node='top-fmt', |
| 85 | filters=[iotests.filter_qmp_testfiles]) |
| 86 | if 'return' in result: |
| 87 | vm.run_job('job0') |