throttle: test that snapshots move the throttling configuration

#!/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'])

.

----------------------------------------------------------------------

Ran 1 tests

OK

093 auto

094 rw auto quick

095 rw auto quick

096 rw auto quick

097 rw auto backing

098 rw auto backing quick

099 rw auto quick