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# Copyright (C) 2020 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.glusterfile import get_md5sum
from glustolibs.gluster.volume_libs import get_subvols, shrink_volume
from glustolibs.gluster.dht_test_utils import find_hashed_subvol
from glustolibs.io.utils import validate_io_procs, wait_for_io_to_complete
@runs_on([['distributed-replicated', 'distributed-dispersed',
'distributed-arbiter', 'distributed'], ['glusterfs']])
class TestRemoveBrickWithOpenFD(GlusterBaseClass):
def setUp(self):
self.get_super_method(self, 'setUp')()
# Creating Volume and mounting the volume
ret = self.setup_volume_and_mount_volume([self.mounts[0]])
if not ret:
raise ExecutionError("Volume creation or mount failed: %s"
% self.volname)
self.is_copy_running = False
def tearDown(self):
# If I/O processes are running wait from them to complete
if self.is_copy_running:
if not wait_for_io_to_complete(self.list_of_io_processes,
self.mounts):
raise ExecutionError("Failed to wait for I/O to complete")
# Unmounting and cleaning volume
ret = self.unmount_volume_and_cleanup_volume([self.mounts[0]])
if not ret:
raise ExecutionError("Unable to delete volume %s" % self.volname)
self.get_super_method(self, 'tearDown')()
def test_remove_brick_with_open_fd(self):
"""
Test case:
1. Create volume, start it and mount it.
2. Open file datafile on mount point and start copying /etc/passwd
line by line(Make sure that the copy is slow).
3. Start remove-brick of the subvol to which has datafile is hashed.
4. Once remove-brick is complete compare the checksum of /etc/passwd
and datafile.
"""
# Open file datafile on mount point and start copying /etc/passwd
# line by line
ret, out, _ = g.run(self.mounts[0].client_system,
"cat /etc/passwd | wc -l")
self.assertFalse(ret, "Failed to get number of lines of /etc/passwd")
cmd = ("cd {}; exec 30<> datafile ;for i in `seq 1 {}`; do "
"head -n $i /etc/passwd | tail -n 1 >> datafile; sleep 10; done"
.format(self.mounts[0].mountpoint, out.strip()))
self.list_of_io_processes = [
g.run_async(self.mounts[0].client_system, cmd)]
self.is_copy_running = True
# Start remove-brick of the subvol to which has datafile is hashed
subvols = get_subvols(self.mnode, self.volname)['volume_subvols']
number = find_hashed_subvol(subvols, "/", 'datafile')[1]
ret = shrink_volume(self.mnode, self.volname, subvol_num=number)
self.assertTrue(ret, "Failed to remove-brick from volume")
g.log.info("Remove-brick rebalance successful")
# Validate if I/O was successful or not.
ret = validate_io_procs(self.list_of_io_processes, self.mounts)
self.assertTrue(ret, "IO failed on some of the clients")
self.is_copy_running = False
# Compare md5checksum of /etc/passwd and datafile
md5_of_orginal_file = get_md5sum(self.mounts[0].client_system,
'/etc/passwd')
self.assertIsNotNone(md5_of_orginal_file,
'Unable to get md5 checksum of orignial file')
md5_of_copied_file = get_md5sum(
self.mounts[0].client_system, '{}/datafile'.format(
self.mounts[0].mountpoint))
self.assertIsNotNone(md5_of_copied_file,
'Unable to get md5 checksum of copied file')
self.assertEqual(md5_of_orginal_file.split(" ")[0],
md5_of_copied_file.split(" ")[0],
"md5 checksum of original and copied file didn't"
" match")
g.log.info("md5 checksum of original and copied files are same")
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