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# Copyright (C) 2016-2018 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.
""" Description:
Test Cases in this module tests the self heal daemon process.
"""
import time
from glusto.core import Glusto as g
from glustolibs.gluster.exceptions import ExecutionError
from glustolibs.gluster.gluster_base_class import GlusterBaseClass, runs_on
from glustolibs.gluster.brick_libs import (
bring_bricks_offline, bring_bricks_online,
select_volume_bricks_to_bring_offline, get_online_bricks_list)
from glustolibs.gluster.heal_libs import (get_self_heal_daemon_pid,
is_shd_daemonized,
monitor_heal_completion,
is_heal_complete)
from glustolibs.gluster.heal_ops import get_heal_info_summary
from glustolibs.io.utils import validate_io_procs
@runs_on([['replicated', 'distributed-replicated'],
['glusterfs', 'cifs', 'nfs']])
class SelfHealDaemonProcessTestsWithHealing(GlusterBaseClass):
"""
SelfHealDaemonProcessTestsWithHealing contains tests which verifies the
self-heal daemon process with healing.
"""
def setUp(self):
"""
setup volume, mount volume and initialize necessary variables
which is used in tests
"""
# calling GlusterBaseClass setUpClass
self.get_super_method(self, 'setUp')()
# Setup Volume and Mount Volume
g.log.info("Starting to Setup Volume and Mount Volume")
ret = self.setup_volume_and_mount_volume(mounts=self.mounts)
if not ret:
raise ExecutionError("Failed to Setup_Volume and Mount_Volume")
g.log.info("Successful in Setup Volume and Mount Volume")
# Verfiy glustershd process releases its parent process
g.log.info("Verifying Self Heal Daemon process is daemonized")
ret = is_shd_daemonized(self.servers)
if not ret:
raise ExecutionError("Self Heal Daemon process was still"
" holding parent process.")
g.log.info("Self Heal Daemon processes are online")
def tearDown(self):
"""
Clean up the volume and umount volume from client
"""
# stopping the volume
g.log.info("Starting to Unmount Volume and Cleanup Volume")
ret = self.unmount_volume_and_cleanup_volume(mounts=self.mounts)
if not ret:
raise ExecutionError("Failed to Unmount Volume and Cleanup Volume")
g.log.info("Successful in Unmount Volume and Cleanup Volume")
# calling GlusterBaseClass tearDown
self.get_super_method(self, 'tearDown')()
def test_existing_glustershd_should_take_care_of_self_healing(self):
"""
Test Script which verifies that the existing glustershd should take
care of self healing
* Create and start the Replicate volume
* Check the glustershd processes - Note the pids
* Bring down the One brick ( lets say brick1) without affecting
the cluster
* Create 1000 files on volume
* bring the brick1 up which was killed in previous steps
* check the heal info - proactive self healing should start
* Bring down brick1 again
* wait for 60 sec and brought up the brick1
* Check the glustershd processes - pids should be different
* Monitor the heal till its complete
"""
# pylint: disable=too-many-locals,too-many-lines,too-many-statements
nodes = self.servers
# check the self-heal daemon process
g.log.info("Starting to get self-heal daemon process on "
"nodes %s", nodes)
ret, pids = get_self_heal_daemon_pid(nodes)
self.assertTrue(ret, ("Either No self heal daemon process found or "
"more than One self heal daemon process "
"found : %s" % pids))
g.log.info("Successful in getting Single self heal daemon process"
" on all nodes %s", nodes)
glustershd_pids = pids
# select the bricks to bring offline
g.log.info("Selecting bricks to brought offline for volume %s",
self.volname)
bricks_to_bring_offline = \
select_volume_bricks_to_bring_offline(self.mnode,
self.volname)
g.log.info("Brick List to bring offline : %s",
bricks_to_bring_offline)
# Bring down the selected bricks
g.log.info("Going to bring down the brick process "
"for %s", bricks_to_bring_offline)
ret = bring_bricks_offline(self.volname, bricks_to_bring_offline)
self.assertTrue(ret, ("Failed to bring down the bricks. Please "
"check the log file for more details."))
g.log.info("Brought down the brick process "
"for %s successfully", bricks_to_bring_offline)
# get the bricks which are running
g.log.info("getting the brick list which are online")
online_bricks = get_online_bricks_list(self.mnode, self.volname)
g.log.info("Online Bricks for volume %s : %s",
self.volname, online_bricks)
# write 1MB files to the mounts
g.log.info("Starting IO on all mounts...")
g.log.info("mounts: %s", self.mounts)
all_mounts_procs = []
cmd = ("for i in `seq 1 1000`; "
"do dd if=/dev/urandom of=%s/file_$i "
"bs=1M count=1; "
"done"
% self.mounts[0].mountpoint)
g.log.info(cmd)
proc = g.run_async(self.mounts[0].client_system, cmd,
user=self.mounts[0].user)
all_mounts_procs.append(proc)
# Validate IO
self.assertTrue(
validate_io_procs(all_mounts_procs, self.mounts),
"IO failed on some of the clients"
)
# check the heal info
g.log.info("Get the pending heal info for the volume %s",
self.volname)
heal_info = get_heal_info_summary(self.mnode, self.volname)
g.log.info("Successfully got heal info for the volume %s",
self.volname)
g.log.info("Heal Info for volume %s : %s", self.volname, heal_info)
# Bring bricks online
g.log.info("Bring bricks: %s online", bricks_to_bring_offline)
ret = bring_bricks_online(self.mnode, self.volname,
bricks_to_bring_offline, 'glusterd_restart')
self.assertTrue(ret, ("Failed to bring bricks: %s online"
% bricks_to_bring_offline))
g.log.info("Successfully brought all bricks: %s online",
bricks_to_bring_offline)
# Wait for 90 sec to start self healing
g.log.info('Waiting for 90 sec to start self healing')
time.sleep(90)
# check the heal info
g.log.info("Get the pending heal info for the volume %s",
self.volname)
heal_info_after_brick_online = get_heal_info_summary(self.mnode,
self.volname)
g.log.info("Successfully got heal info for the volume %s",
self.volname)
g.log.info("Heal Info for volume %s : %s",
self.volname, heal_info_after_brick_online)
# check heal pending is decreased
flag = False
for brick in online_bricks:
if int(heal_info_after_brick_online[brick]['numberOfEntries'])\
< int(heal_info[brick]['numberOfEntries']):
flag = True
break
self.assertTrue(flag, "Pro-active self heal is not started")
g.log.info("Pro-active self heal is started")
# bring down bricks again
g.log.info("Going to bring down the brick process "
"for %s", bricks_to_bring_offline)
ret = bring_bricks_offline(self.volname, bricks_to_bring_offline)
self.assertTrue(ret, ("Failed to bring down the bricks. Please "
"check the log file for more details."))
g.log.info("Brought down the brick process "
"for %s successfully", bricks_to_bring_offline)
# wait for 60 sec and brought up the brick again
g.log.info('waiting for 60 sec and brought up the brick again')
time.sleep(60)
g.log.info("Bring bricks: %s online", bricks_to_bring_offline)
ret = bring_bricks_online(self.mnode, self.volname,
bricks_to_bring_offline, 'glusterd_restart')
self.assertTrue(ret, ("Failed to bring bricks: %s online"
% bricks_to_bring_offline))
g.log.info("Successfully brought all bricks: %s online",
bricks_to_bring_offline)
# Verfiy glustershd process releases its parent process
ret = is_shd_daemonized(nodes)
self.assertTrue(ret, ("Either No self heal daemon process found or "
"more than One self heal daemon process found"))
# check the self-heal daemon process
g.log.info("Starting to get self-heal daemon process on "
"nodes %s", nodes)
ret, pids = get_self_heal_daemon_pid(nodes)
self.assertTrue(ret, ("Either No self heal daemon process found or "
"more than One self heal daemon process "
"found : %s" % pids))
g.log.info("Successful in getting Single self heal daemon process"
" on all nodes %s", nodes)
shd_pids_after_bricks_online = pids
# compare the glustershd pids
self.assertNotEqual(glustershd_pids,
shd_pids_after_bricks_online,
("self heal daemon process are same before and "
"after bringing up bricks online"))
g.log.info("EXPECTED : self heal daemon process are different before "
"and after bringing up bricks online")
# wait for heal to complete
g.log.info("Monitoring the heal.....")
ret = monitor_heal_completion(self.mnode, self.volname)
self.assertTrue(ret, ("Heal is not completed on volume %s"
% self.volname))
g.log.info("Heal Completed on volume %s", self.volname)
# 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')
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