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# Copyright (C) 2021 Red Hat, Inc. <http://www.redhat.com>
#
# 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
# 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, write to the Free Software Foundation, Inc.,
# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
from glusto.core import Glusto as g
from glustolibs.gluster.gluster_base_class import GlusterBaseClass, runs_on
from glustolibs.gluster.exceptions import ExecutionError
from glustolibs.gluster.rebalance_ops import (
rebalance_start, wait_for_rebalance_to_complete)
from glustolibs.gluster.volume_libs import expand_volume
from glustolibs.io.utils import collect_mounts_arequal
@runs_on([['distributed', 'distributed-replicated'],
['glusterfs']])
class TestRebalanceMultipleExpansions(GlusterBaseClass):
def setUp(self):
self.get_super_method(self, 'setUp')()
# Setup Volume
if not self.setup_volume_and_mount_volume([self.mounts[0]]):
raise ExecutionError("Failed to Setup and mount volume")
self.first_client = self.mounts[0].client_system
def tearDown(self):
# Unmount and clean volume
if not self.unmount_volume_and_cleanup_volume([self.mounts[0]]):
raise ExecutionError("Failed to Cleanup Volume")
# Calling GlusterBaseClass tearDown
self.get_super_method(self, 'tearDown')()
def test_rebalance_multiple_expansions(self):
"""
Test case:
1. Create a volume, start it and mount it
2. Create some file on mountpoint
3. Collect arequal checksum on mount point pre-rebalance
4. Do the following 3 times:
5. Expand the volume
6. Start rebalance and wait for it to finish
7. Collect arequal checksum on mount point post-rebalance
and compare with value from step 3
"""
# Create some file on mountpoint
cmd = ("cd %s; for i in {1..500} ; do "
"dd if=/dev/urandom of=file$i bs=10M count=1; done"
% self.mounts[0].mountpoint)
ret, _, _ = g.run(self.first_client, cmd)
self.assertEqual(ret, 0, "IO failed on volume %s"
% self.volname)
# Collect arequal checksum before rebalance
arequal_checksum_before = collect_mounts_arequal(self.mounts[0])
for _ in range(3):
# Add brick to volume
ret = expand_volume(self.mnode, self.volname, self.servers,
self.all_servers_info)
self.assertTrue(ret, "Failed to add brick on volume %s"
% self.volname)
# Trigger rebalance and wait for it to complete
ret, _, _ = rebalance_start(self.mnode, self.volname,
force=True)
self.assertEqual(ret, 0, "Failed to start rebalance on "
"volume %s" % self.volname)
# Wait for rebalance to complete
ret = wait_for_rebalance_to_complete(self.mnode, self.volname,
timeout=1200)
self.assertTrue(ret, "Rebalance is not yet complete on the volume "
"%s" % self.volname)
g.log.info("Rebalance successfully completed")
# Collect arequal checksum after rebalance
arequal_checksum_after = collect_mounts_arequal(self.mounts[0])
# Check for data loss by comparing arequal before and after
# rebalance
self.assertEqual(arequal_checksum_before, arequal_checksum_after,
"arequal checksum is NOT MATCHNG")
g.log.info("arequal checksum is SAME")
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