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#!/usr/bin/env python
#
# Test that snapshots move the throttling configuration to the active
# layer
#
# Copyright (C) 2015 Igalia, S.L.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
import iotests
import os
class TestLiveSnapshot(iotests.QMPTestCase):
base_img = os.path.join(iotests.test_dir, 'base.img')
target_img = os.path.join(iotests.test_dir, 'target.img')
group = 'mygroup'
iops = 6000
iops_size = 1024
def setUp(self):
opts = []
opts.append('node-name=base')
opts.append('throttling.group=%s' % self.group)
opts.append('throttling.iops-total=%d' % self.iops)
opts.append('throttling.iops-size=%d' % self.iops_size)
iotests.qemu_img('create', '-f', iotests.imgfmt, self.base_img, '100M')
self.vm = iotests.VM().add_drive(self.base_img, ','.join(opts))
self.vm.launch()
def tearDown(self):
self.vm.shutdown()
os.remove(self.base_img)
os.remove(self.target_img)
def checkConfig(self, active_layer):
result = self.vm.qmp('query-named-block-nodes')
for r in result['return']:
if r['node-name'] == active_layer:
self.assertEqual(r['group'], self.group)
self.assertEqual(r['iops'], self.iops)
self.assertEqual(r['iops_size'], self.iops_size)
else:
self.assertFalse(r.has_key('group'))
self.assertEqual(r['iops'], 0)
self.assertFalse(r.has_key('iops_size'))
def testSnapshot(self):
self.checkConfig('base')
self.vm.qmp('blockdev-snapshot-sync',
node_name = 'base',
snapshot_node_name = 'target',
snapshot_file = self.target_img,
format = iotests.imgfmt)
self.checkConfig('target')
if __name__ == '__main__':
iotests.main(supported_fmts=['qcow2'])
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