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# Copyright (C) 2015-2020 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.
""" Test Arbiter Specific Cases"""
from glusto.core import Glusto as g
from glustolibs.gluster.gluster_base_class import (GlusterBaseClass, runs_on)
from glustolibs.gluster.volume_libs import (
expand_volume, wait_for_volume_process_to_be_online,
verify_all_process_of_volume_are_online, shrink_volume, get_subvols)
from glustolibs.gluster.exceptions import ExecutionError
from glustolibs.io.utils import run_linux_untar
from glustolibs.gluster.heal_libs import (monitor_heal_completion,
is_heal_complete,
is_volume_in_split_brain)
from glustolibs.gluster.glusterdir import mkdir
from glustolibs.gluster.heal_ops import trigger_heal
@runs_on([['replicated', 'distributed-replicated'],
['glusterfs', 'nfs', 'cifs']])
class GlusterArbiterVolumeTypeClass(GlusterBaseClass):
"""Class for testing Volume Type Change from replicated to
Arbitered volume
"""
def setUp(self):
"""
Setup Volume
"""
# Calling GlusterBaseClass setUp
self.get_super_method(self, 'setUp')()
# Set I/O flag to false
self.is_io_running = False
# Setup Volume
g.log.info("Starting to Setup and Mount Volume")
# 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.subvols = get_subvols(self.mnode, self.volname)['volume_subvols']
def tearDown(self):
# Wait for I/O if not completed
if self.is_io_running:
if not self._wait_for_untar_completion():
g.log.error("I/O failed to stop on clients")
# 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)
# Calling GlusterBaseClass tearDown
self.get_super_method(self, 'tearDown')()
# Clearing bricks
for subvol in self.subvols:
for brick in subvol:
g.log.info('Clearing brick %s', brick)
node, brick_path = brick.split(':')
ret, _, err = g.run(node, 'rm -rf %s' % brick_path)
self.assertFalse(ret, err)
g.log.info('Clearing brick %s is successful', brick)
g.log.info('Clearing for all brick is successful')
def _wait_for_untar_completion(self):
"""Wait for untar to complete"""
has_process_stopped = []
for proc in self.io_process:
try:
ret, _, _ = proc.async_communicate()
if not ret:
has_process_stopped.append(False)
has_process_stopped.append(True)
except ValueError:
has_process_stopped.append(True)
return all(has_process_stopped)
def _convert_replicated_to_arbiter_volume(self):
"""
Helper module to convert replicated to arbiter volume.
"""
# pylint: disable=too-many-statements
# Remove brick to reduce the replica count from replica 3
g.log.info("Removing bricks to form replica 2 volume")
ret = shrink_volume(self.mnode, self.volname, replica_num=0)
self.assertTrue(ret, "Failed to remove brick on volume %s"
% self.volname)
g.log.info("Successfully removed brick on volume %s", self.volname)
# Wait for volume processes to be online
g.log.info("Wait for volume processes to be online")
ret = wait_for_volume_process_to_be_online(self.mnode, self.volname)
self.assertTrue(ret, "Volume %s process not online despite waiting "
"for 300 seconds" % self.volname)
g.log.info("Successful in waiting for volume %s processes to be "
"online", self.volname)
# Verifying all bricks online
g.log.info("Verifying volume's all process are online")
ret = verify_all_process_of_volume_are_online(self.mnode, self.volname)
self.assertTrue(ret, "Volume %s : All process are not online"
% self.volname)
g.log.info("Volume %s : All process are online", self.volname)
# Adding the bricks to make arbiter brick
g.log.info("Adding bricks to convert to Arbiter Volume")
replica_arbiter = {'replica_count': 1, 'arbiter_count': 1}
ret = expand_volume(self.mnode, self.volname, self.servers,
self.all_servers_info, force=True,
**replica_arbiter)
self.assertTrue(ret, "Failed to expand the volume %s" % self.volname)
g.log.info("Changing volume to arbiter volume is successful %s",
self.volname)
# Wait for volume processes to be online
g.log.info("Wait for volume processes to be online")
ret = wait_for_volume_process_to_be_online(self.mnode, self.volname)
self.assertTrue(ret, "Failed to wait for volume %s processes "
"to be online" % self.volname)
g.log.info("Successful in waiting for volume %s processes to be "
"online", self.volname)
# Verify volume's all process are online
g.log.info("Verifying volume's all process are online")
ret = verify_all_process_of_volume_are_online(self.mnode, self.volname)
self.assertTrue(ret, "Volume %s : All process are not online"
% self.volname)
g.log.info("Volume %s : All process are online", self.volname)
def test_replicated_to_arbiter_volume(self):
"""
Description:-
Reduce the replica count from replica 3 to arbiter
"""
# pylint: disable=too-many-statements
self._convert_replicated_to_arbiter_volume()
def test_replica_to_arbiter_volume_with_io(self):
"""
Description: Replica 3 to arbiter conversion with ongoing IO's
Steps :
1) Create a replica 3 volume and start volume.
2) Set client side self heal off.
3) Fuse mount the volume.
4) Create directory dir1 and write data.
Example: untar linux tar from the client into the dir1
5) When IO's is running, execute remove-brick command,
and convert replica 3 to replica 2 volume
6) Execute add-brick command and convert to arbiter volume,
provide the path of new arbiter brick.
7) Issue gluster volume heal.
8) Heal should be completed with no files in split-brain.
"""
# pylint: disable=too-many-statements
# Create a dir to start untar
self.linux_untar_dir = "{}/{}".format(self.mounts[0].mountpoint,
"linuxuntar")
ret = mkdir(self.clients[0], self.linux_untar_dir)
self.assertTrue(ret, "Failed to create dir linuxuntar for untar")
# Start linux untar on dir linuxuntar
self.io_process = run_linux_untar(self.clients[0],
self.mounts[0].mountpoint,
dirs=tuple(['linuxuntar']))
self.is_io_running = True
# Convert relicated to arbiter volume
self._convert_replicated_to_arbiter_volume()
# Wait for IO to complete.
ret = self._wait_for_untar_completion()
self.assertFalse(ret, "IO didn't complete or failed on client")
self.is_io_running = False
# Start healing
ret = trigger_heal(self.mnode, self.volname)
self.assertTrue(ret, 'Heal is not started')
g.log.info('Healing is started')
# Monitor heal completion
ret = monitor_heal_completion(self.mnode, self.volname,
timeout_period=3600)
self.assertTrue(ret, 'Heal has not yet completed')
# Check if heal is completed
ret = is_heal_complete(self.mnode, self.volname)
self.assertTrue(ret, 'Heal is not complete')
g.log.info('Heal is completed successfully')
# Check for split-brain
ret = is_volume_in_split_brain(self.mnode, self.volname)
self.assertFalse(ret, 'Volume is in split-brain state')
g.log.info('Volume is not in split-brain state')
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