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9dd003a998
We are going to drop group file. Define group in tests as a preparatory
step.
The patch is generated by
cd tests/qemu-iotests
grep '^[0-9]\{3\} ' group | while read line; do
file=$(awk '{print $1}' <<< "$line");
groups=$(sed -e 's/^... //' <<< "$line");
awk "NR==2{print \"# group: $groups\"}1" $file > tmp;
cat tmp > $file;
done
Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20210116134424.82867-7-vsementsov@virtuozzo.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
263 lines
9.1 KiB
Python
Executable File
263 lines
9.1 KiB
Python
Executable File
#!/usr/bin/env python3
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# group: rw migration
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#
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# Tests for dirty bitmaps postcopy migration.
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#
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# Copyright (c) 2016-2017 Virtuozzo International GmbH. All rights reserved.
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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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import os
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import iotests
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from iotests import qemu_img
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debug = False
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disk_a = os.path.join(iotests.test_dir, 'disk_a')
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disk_b = os.path.join(iotests.test_dir, 'disk_b')
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size = '256G'
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fifo = os.path.join(iotests.test_dir, 'mig_fifo')
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granularity = 512
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nb_bitmaps = 15
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GiB = 1024 * 1024 * 1024
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discards1 = (
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(0, GiB),
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(2 * GiB + 512 * 5, 512),
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(3 * GiB + 512 * 5, 512),
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(100 * GiB, GiB)
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)
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discards2 = (
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(3 * GiB + 512 * 8, 512),
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(4 * GiB + 512 * 8, 512),
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(50 * GiB, GiB),
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(100 * GiB + GiB // 2, GiB)
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)
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def apply_discards(vm, discards):
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for d in discards:
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vm.hmp_qemu_io('drive0', 'discard {} {}'.format(*d))
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def event_seconds(event):
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return event['timestamp']['seconds'] + \
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event['timestamp']['microseconds'] / 1000000.0
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def event_dist(e1, e2):
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return event_seconds(e2) - event_seconds(e1)
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def check_bitmaps(vm, count):
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result = vm.qmp('query-block')
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if count == 0:
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assert 'dirty-bitmaps' not in result['return'][0]
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else:
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assert len(result['return'][0]['dirty-bitmaps']) == count
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class TestDirtyBitmapPostcopyMigration(iotests.QMPTestCase):
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def tearDown(self):
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if debug:
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self.vm_a_events += self.vm_a.get_qmp_events()
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self.vm_b_events += self.vm_b.get_qmp_events()
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for e in self.vm_a_events:
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e['vm'] = 'SRC'
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for e in self.vm_b_events:
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e['vm'] = 'DST'
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events = (self.vm_a_events + self.vm_b_events)
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events = [(e['timestamp']['seconds'],
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e['timestamp']['microseconds'],
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e['vm'],
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e['event'],
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e.get('data', '')) for e in events]
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for e in sorted(events):
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print('{}.{:06} {} {} {}'.format(*e))
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self.vm_a.shutdown()
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self.vm_b.shutdown()
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os.remove(disk_a)
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os.remove(disk_b)
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os.remove(fifo)
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def setUp(self):
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os.mkfifo(fifo)
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qemu_img('create', '-f', iotests.imgfmt, disk_a, size)
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qemu_img('create', '-f', iotests.imgfmt, disk_b, size)
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self.vm_a = iotests.VM(path_suffix='a').add_drive(disk_a,
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'discard=unmap')
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self.vm_b = iotests.VM(path_suffix='b').add_drive(disk_b,
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'discard=unmap')
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self.vm_b.add_incoming("exec: cat '" + fifo + "'")
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self.vm_a.launch()
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self.vm_b.launch()
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# collect received events for debug
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self.vm_a_events = []
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self.vm_b_events = []
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def start_postcopy(self):
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""" Run migration until RESUME event on target. Return this event. """
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for i in range(nb_bitmaps):
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result = self.vm_a.qmp('block-dirty-bitmap-add', node='drive0',
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name='bitmap{}'.format(i),
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granularity=granularity,
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persistent=True)
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self.assert_qmp(result, 'return', {})
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result = self.vm_a.qmp('x-debug-block-dirty-bitmap-sha256',
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node='drive0', name='bitmap0')
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empty_sha256 = result['return']['sha256']
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apply_discards(self.vm_a, discards1)
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result = self.vm_a.qmp('x-debug-block-dirty-bitmap-sha256',
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node='drive0', name='bitmap0')
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self.discards1_sha256 = result['return']['sha256']
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# Check, that updating the bitmap by discards works
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assert self.discards1_sha256 != empty_sha256
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# We want to calculate resulting sha256. Do it in bitmap0, so, disable
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# other bitmaps
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for i in range(1, nb_bitmaps):
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result = self.vm_a.qmp('block-dirty-bitmap-disable', node='drive0',
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name='bitmap{}'.format(i))
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self.assert_qmp(result, 'return', {})
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apply_discards(self.vm_a, discards2)
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result = self.vm_a.qmp('x-debug-block-dirty-bitmap-sha256',
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node='drive0', name='bitmap0')
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self.all_discards_sha256 = result['return']['sha256']
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# Now, enable some bitmaps, to be updated during migration
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for i in range(2, nb_bitmaps, 2):
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result = self.vm_a.qmp('block-dirty-bitmap-enable', node='drive0',
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name='bitmap{}'.format(i))
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self.assert_qmp(result, 'return', {})
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caps = [{'capability': 'dirty-bitmaps', 'state': True},
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{'capability': 'events', 'state': True}]
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result = self.vm_a.qmp('migrate-set-capabilities', capabilities=caps)
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self.assert_qmp(result, 'return', {})
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result = self.vm_b.qmp('migrate-set-capabilities', capabilities=caps)
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self.assert_qmp(result, 'return', {})
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result = self.vm_a.qmp('migrate', uri='exec:cat>' + fifo)
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self.assert_qmp(result, 'return', {})
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result = self.vm_a.qmp('migrate-start-postcopy')
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self.assert_qmp(result, 'return', {})
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event_resume = self.vm_b.event_wait('RESUME')
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self.vm_b_events.append(event_resume)
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return event_resume
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def test_postcopy_success(self):
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event_resume = self.start_postcopy()
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# enabled bitmaps should be updated
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apply_discards(self.vm_b, discards2)
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match = {'data': {'status': 'completed'}}
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event_complete = self.vm_b.event_wait('MIGRATION', match=match)
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self.vm_b_events.append(event_complete)
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# take queued event, should already been happened
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event_stop = self.vm_a.event_wait('STOP')
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self.vm_a_events.append(event_stop)
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downtime = event_dist(event_stop, event_resume)
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postcopy_time = event_dist(event_resume, event_complete)
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assert downtime * 10 < postcopy_time
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if debug:
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print('downtime:', downtime)
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print('postcopy_time:', postcopy_time)
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# check that there are no bitmaps stored on source
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self.vm_a_events += self.vm_a.get_qmp_events()
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self.vm_a.shutdown()
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self.vm_a.launch()
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check_bitmaps(self.vm_a, 0)
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# check that bitmaps are migrated and persistence works
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check_bitmaps(self.vm_b, nb_bitmaps)
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self.vm_b.shutdown()
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# recreate vm_b, so there is no incoming option, which prevents
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# loading bitmaps from disk
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self.vm_b = iotests.VM(path_suffix='b').add_drive(disk_b)
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self.vm_b.launch()
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check_bitmaps(self.vm_b, nb_bitmaps)
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# Check content of migrated bitmaps. Still, don't waste time checking
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# every bitmap
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for i in range(0, nb_bitmaps, 5):
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result = self.vm_b.qmp('x-debug-block-dirty-bitmap-sha256',
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node='drive0', name='bitmap{}'.format(i))
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sha = self.discards1_sha256 if i % 2 else self.all_discards_sha256
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self.assert_qmp(result, 'return/sha256', sha)
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def test_early_shutdown_destination(self):
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self.start_postcopy()
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self.vm_b_events += self.vm_b.get_qmp_events()
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self.vm_b.shutdown()
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# recreate vm_b, so there is no incoming option, which prevents
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# loading bitmaps from disk
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self.vm_b = iotests.VM(path_suffix='b').add_drive(disk_b)
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self.vm_b.launch()
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check_bitmaps(self.vm_b, 0)
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# Bitmaps will be lost if we just shutdown the vm, as they are marked
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# to skip storing to disk when prepared for migration. And that's
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# correct, as actual data may be modified in target vm, so we play
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# safe.
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# Still, this mark would be taken away if we do 'cont', and bitmaps
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# become persistent again. (see iotest 169 for such behavior case)
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result = self.vm_a.qmp('query-status')
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assert not result['return']['running']
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self.vm_a_events += self.vm_a.get_qmp_events()
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self.vm_a.shutdown()
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self.vm_a.launch()
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check_bitmaps(self.vm_a, 0)
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def test_early_kill_source(self):
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self.start_postcopy()
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self.vm_a_events = self.vm_a.get_qmp_events()
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self.vm_a.kill()
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self.vm_a.launch()
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match = {'data': {'status': 'completed'}}
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e_complete = self.vm_b.event_wait('MIGRATION', match=match)
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self.vm_b_events.append(e_complete)
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check_bitmaps(self.vm_a, 0)
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check_bitmaps(self.vm_b, 0)
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if __name__ == '__main__':
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iotests.main(supported_fmts=['qcow2'])
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