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#  Copyright (C) 2016-2020  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.

""" Description:
        Test Cases in this module tests the client side quorum.
"""
from time import sleep

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.volume_libs import get_subvols
from glustolibs.misc.misc_libs import upload_scripts
from glustolibs.gluster.volume_ops import (set_volume_options,
                                           reset_volume_option)
from glustolibs.gluster.brick_libs import (bring_bricks_offline,
                                           bring_bricks_online)
from glustolibs.io.utils import (validate_io_procs,
                                 is_io_procs_fail_with_error)


@runs_on([['replicated', 'distributed-replicated'],
          ['glusterfs']])
class ClientSideQuorumTestsWithSingleVolumeCross3(GlusterBaseClass):
    """
    ClientSideQuorumTestsWithSingleVolumeCross3 contains tests which
    verifies the client side quorum Test Cases with cross 3 volume.
    """
    @classmethod
    def setUpClass(cls):
        """
        Upload the necessary scripts to run tests.
        """
        # calling GlusterBaseClass setUpClass
        cls.get_super_method(cls, 'setUpClass')()

        # Upload io scripts for running IO on mounts
        g.log.info("Upload io scripts to clients %s for running IO on "
                   "mounts", cls.clients)
        cls.script_upload_path = ("/usr/share/glustolibs/io/scripts/"
                                  "file_dir_ops.py")
        ret = upload_scripts(cls.clients, cls.script_upload_path)
        if not ret:
            raise ExecutionError("Failed to upload IO scripts to clients")

    def setUp(self):
        """
        setUp method for every test
        """
        # calling GlusterBaseClass setUp
        self.get_super_method(self, 'setUp')()

        # Setup Volume and Mount Volume
        g.log.info("Starting to Setup Volume %s", self.volname)
        ret = self.setup_volume_and_mount_volume(self.mounts)
        if not ret:
            raise ExecutionError("Failed to Setup_Volume and Mount_Volume")
        g.log.info("Successful in Setup Volume and Mount Volume")

    def tearDown(self):
        """
        tearDown for every test
        """

        # Reset the volume options set inside the test
        g.log.info("Reset the volume options")
        vol_options = ['cluster.self-heal-daemon', 'cluster.quorum-type',
                       'cluster.quorum-count']
        for opt in vol_options:
            ret, _, _ = reset_volume_option(self.mnode, self.volname, opt)
            if ret != 0:
                raise ExecutionError("Failed to reset the volume option %s"
                                     % opt)
            sleep(2)
        g.log.info("Successfully reset the volume options")

        # 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_client_side_quorum_with_fixed_for_cross3(self):
        """
        Test Script to verify the Client Side Quorum with fixed
        for cross 3 volume

        * Disable self heal daemom
        * set cluster.quorum-type to fixed.
        * start I/O( write and read )from the mount point - must succeed
        * Bring down brick1
        * start I/0 ( write and read ) - must succeed
        * Bring down brick2
        * start I/0 ( write and read ) - must succeed
        * set the cluster.quorum-count to 1
        * start I/0 ( write and read ) - must succeed
        * set the cluster.quorum-count to 2
        * start I/0 ( write and read ) - read and write will fail
        * bring back the brick1 online
        * start I/0 ( write and read ) - must succeed
        * Bring back brick2 online
        * start I/0 ( write and read ) - must succeed
        * set cluster.quorum-type to auto
        * start I/0 ( write and read ) - must succeed
        * Bring down brick1 and brick2
        * start I/0 ( write and read ) - read and write will fail
        * set the cluster.quorum-count to 1
        * start I/0 ( write and read ) - read and write will fail
        * set the cluster.quorum-count to 3
        * start I/0 ( write and read ) - read and write will fail
        * set the quorum-type to none
        * start I/0 ( write and read ) - must succeed

        """
        # pylint: disable=too-many-locals,too-many-statements,too-many-branches
        # Disable self heal daemon
        options = {"cluster.self-heal-daemon": "off"}
        g.log.info("setting %s for the volume %s", options, self.volname)
        ret = set_volume_options(self.mnode, self.volname, options)
        self.assertTrue(ret, ("Unable to set %s for volume %s"
                              % (options, self.volname)))
        g.log.info("Successfully set %s for volume %s", options, self.volname)

        # set cluster.quorum-type to fixed
        options = {"cluster.quorum-type": "fixed"}
        g.log.info("setting %s for the volume %s", options, self.volname)
        ret = set_volume_options(self.mnode, self.volname, options)
        self.assertTrue(ret, ("Unable to set %s for volume %s"
                              % (options, self.volname)))
        g.log.info("Successfully set %s for volume %s", options, self.volname)

        # start I/O( write ) - must succeed
        all_mounts_procs = []
        g.log.info("Starting IO on mountpoint %s", self.mounts[0].mountpoint)
        cmd = ("/usr/bin/env python %s create_files "
               "-f 10 --base-file-name file %s" % (
                   self.script_upload_path,
                   self.mounts[0].mountpoint))
        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 mountpoint %s"
                        % self.mounts[0].mountpoint)

        # read the file
        g.log.info("Start reading files on %s", self.mounts[0].mountpoint)
        all_mounts_procs = []
        cmd = "/usr/bin/env python %s read %s" % (
            self.script_upload_path,
            self.mounts[0].mountpoint)
        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),
                        "Reads failed on some of the clients")

        # get the subvolumes
        g.log.info("Starting to get sub-volumes for volume %s", self.volname)
        subvols_dict = get_subvols(self.mnode, self.volname)
        num_subvols = len(subvols_dict['volume_subvols'])
        g.log.info("Number of subvolumes in volume %s:", num_subvols)

        # bring down brick1 for all the subvolumes
        offline_brick1_from_replicasets = []
        for i in range(0, num_subvols):
            subvol_brick_list = subvols_dict['volume_subvols'][i]
            g.log.info("sub-volume %s brick list : %s",
                       i, subvol_brick_list)
            brick_to_bring_offline1 = subvol_brick_list[0]
            g.log.info("Going to bring down the brick process "
                       "for %s", brick_to_bring_offline1)
            ret = bring_bricks_offline(self.volname, brick_to_bring_offline1)
            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", brick_to_bring_offline1)
            offline_brick1_from_replicasets.append(brick_to_bring_offline1)

        # start I/0 ( write and read ) - must succeed
        g.log.info("Starting IO on mountpoint %s", self.mounts[0].mountpoint)
        all_mounts_procs = []
        cmd = ("/usr/bin/env python %s create_files "
               "-f 10 --base-file-name testfile %s" % (
                   self.script_upload_path,
                   self.mounts[0].mountpoint))
        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 mountpoint %s"
                        % self.mounts[0].mountpoint)

        # read the file
        g.log.info("Start reading files on mountpoint %s",
                   self.mounts[0].mountpoint)
        all_mounts_procs = []
        cmd = "/usr/bin/env python %s read %s" % (
            self.script_upload_path,
            self.mounts[0].mountpoint)
        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),
                        "Reads failed on mountpoint %s"
                        % self.mounts[0].mountpoint)

        # bring down brick2 for all the subvolumes
        offline_brick2_from_replicasets = []
        for i in range(0, num_subvols):
            subvol_brick_list = subvols_dict['volume_subvols'][i]
            g.log.info("sub-volume %s brick list : %s", i, subvol_brick_list)
            brick_to_bring_offline2 = subvol_brick_list[1]
            g.log.info("Going to bring down the brick process "
                       "for %s", brick_to_bring_offline2)
            ret = bring_bricks_offline(self.volname, brick_to_bring_offline2)
            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", brick_to_bring_offline2)
            offline_brick2_from_replicasets.append(brick_to_bring_offline2)

        # start I/0 ( write and read ) - must succeed
        g.log.info("Starting IO on mountpoint %s", self.mounts[0].mountpoint)
        all_mounts_procs = []
        cmd = ("/usr/bin/env python %s create_files "
               "-f 10 --base-file-name newfile %s" % (
                   self.script_upload_path,
                   self.mounts[0].mountpoint))
        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 mountpoint %s"
                        % self.mounts[0].mountpoint)

        # read the file
        g.log.info("Start reading files on mountpoint %s",
                   self.mounts[0].mountpoint)
        all_mounts_procs = []
        cmd = "/usr/bin/env python %s read %s" % (
            self.script_upload_path,
            self.mounts[0].mountpoint)
        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),
                        "Reads failed on mountpoint %s"
                        % self.mounts[0].mountpoint)

        # set the cluster.quorum-count to 1
        options = {"cluster.quorum-count": "1"}
        g.log.info("setting %s for the volume %s", options, self.volname)
        ret = set_volume_options(self.mnode, self.volname, options)
        self.assertTrue(ret, "Unable to set %s for volume %s"
                        % (options, self.volname))
        g.log.info("Successfully set %s for volume %s", options, self.volname)

        # start I/0 ( write and read ) - must succeed
        g.log.info("Starting IO on mountpoint %s", self.mounts[0].mountpoint)
        all_mounts_procs = []
        cmd = ("/usr/bin/env python %s create_files "
               "-f 10 --base-file-name filename %s" % (
                   self.script_upload_path,
                   self.mounts[0].mountpoint))
        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 mountpoint %s"
                        % self.mounts[0].mountpoint)

        # read the file
        g.log.info("Start reading files on mountpoint %s",
                   self.mounts[0].mountpoint)
        all_mounts_procs = []
        cmd = "/usr/bin/env python %s read %s" % (
            self.script_upload_path,
            self.mounts[0].mountpoint)
        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),
                        "Reads failed on mountpoint %s"
                        % self.mounts[0].mountpoint)

        # set the cluster.quorum-count to 2
        options = {"cluster.quorum-count": "2"}
        g.log.info("setting %s for the volume %s", options, self.volname)
        ret = set_volume_options(self.mnode, self.volname, options)
        self.assertTrue(ret, ("Unable to set %s for volume %s"
                              % (options, self.volname)))
        g.log.info("Successfully set %s for volume %s", options, self.volname)

        # start I/0 ( write and read ) - read and write will fail
        g.log.info("Starting IO on mountpoint %s", self.mounts[0].mountpoint)
        all_mounts_procs = []
        cmd = ("dd if=/dev/urandom of=%s/test_file bs=1M count=1"
               % self.mounts[0].mountpoint)
        proc = g.run_async(self.mounts[0].client_system, cmd,
                           user=self.mounts[0].user)
        all_mounts_procs.append(proc)

        # Validate IO
        g.log.info("Validating whether IO failed with "
                   "Transport endpoint is not connected")
        ret, _ = is_io_procs_fail_with_error(self, all_mounts_procs,
                                             self.mounts, self.mount_type)
        self.assertTrue(ret, ("Unexpected Error and IO successful"
                              " on not connected transport endpoint"))
        g.log.info("EXPECTED: Transport endpoint is not connected"
                   " while creating file")

        # read the file
        g.log.info("Start reading files on mountpoint %s",
                   self.mounts[0].mountpoint)
        all_mounts_procs = []
        cmd = ("cat %s/file1.txt" % self.mounts[0].mountpoint)
        proc = g.run_async(self.mounts[0].client_system, cmd,
                           user=self.mounts[0].user)
        all_mounts_procs.append(proc)

        # Validate IO
        g.log.info("Validating whether IO failed with "
                   "Transport endpoint is not connected")
        ret, _ = is_io_procs_fail_with_error(self, all_mounts_procs,
                                             self.mounts, self.mount_type)
        self.assertTrue(ret, ("Unexpected error and IO successful"
                              " on not connected transport endpoint"))
        g.log.info("EXPECTED: Transport endpoint is not connected"
                   " while reading file")

        # bring back the brick1 online for all subvolumes
        g.log.info("bringing up the brick : %s online",
                   offline_brick1_from_replicasets)
        ret = bring_bricks_online(
            self.mnode, self.volname, offline_brick1_from_replicasets,
            bring_bricks_online_methods='glusterd_restart')
        self.assertTrue(ret, ("Failed to brought the brick %s online"
                              % offline_brick1_from_replicasets))
        g.log.info("Successfully brought the brick %s online",
                   offline_brick1_from_replicasets)

        # start I/0 ( write and read ) - must succeed
        g.log.info("Starting IO on mountpoint %s", self.mounts[0].mountpoint)
        all_mounts_procs = []
        cmd = ("/usr/bin/env python %s create_files "
               "-f 10 --base-file-name newfilename %s" % (
                   self.script_upload_path,
                   self.mounts[0].mountpoint))
        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 mountpoint %s"
                        % self.mounts[0].mountpoint)

        # read the file
        g.log.info("Start reading files on mountpoint %s",
                   self.mounts[0].mountpoint)
        all_mounts_procs = []
        cmd = "/usr/bin/env python %s read %s" % (
            self.script_upload_path,
            self.mounts[0].mountpoint)
        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),
                        "Reads failed on mountpoint %s"
                        % self.mounts[0].mountpoint)

        # Bring back brick2 online
        g.log.info("bringing up the brick : %s online",
                   offline_brick2_from_replicasets)
        ret = bring_bricks_online(
            self.mnode, self.volname, offline_brick2_from_replicasets,
            bring_bricks_online_methods='glusterd_restart')
        self.assertTrue(ret, ("Failed to brought the brick %s online"
                              % offline_brick2_from_replicasets))
        g.log.info("Successfully brought the brick %s online",
                   offline_brick2_from_replicasets)

        # start I/0 ( write and read ) - must succeed
        g.log.info("Starting IO on mountpoint %s", self.mounts[0].mountpoint)
        all_mounts_procs = []
        cmd = ("/usr/bin/env python %s create_files "
               "-f 10 --base-file-name textfile %s" % (
                   self.script_upload_path,
                   self.mounts[0].mountpoint))
        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 mountpoint %s"
                        % self.mounts[0].mountpoint)

        # read the file
        g.log.info("Start reading files on mountpoint %s",
                   self.mounts[0].mountpoint)
        all_mounts_procs = []
        cmd = "/usr/bin/env python %s read %s" % (
            self.script_upload_path,
            self.mounts[0].mountpoint)
        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),
                        "Reads failed on mountpoint %s"
                        % self.mounts[0].mountpoint)

        # set cluster.quorum-type to auto
        options = {"cluster.quorum-type": "auto"}
        g.log.info("setting %s for the volume %s", options, self.volname)
        ret = set_volume_options(self.mnode, self.volname, options)
        self.assertTrue(ret, ("Unable to set %s for volume %s"
                              % (options, self.volname)))
        g.log.info("Successfully set %s for volume %s", options, self.volname)

        # start I/0 ( write and read ) - must succeed
        g.log.info("Starting IO on mountpoint %s", self.mounts[0].mountpoint)
        all_mounts_procs = []
        cmd = ("/usr/bin/env python %s create_files "
               "-f 10 --base-file-name newtextfile %s" % (
                   self.script_upload_path,
                   self.mounts[0].mountpoint))
        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 mountpoint %s"
                        % self.mounts[0].mountpoint)

        # read the file
        g.log.info("Start reading files on mountpoint %s",
                   self.mounts[0].mountpoint)
        all_mounts_procs = []
        cmd = "/usr/bin/env python %s read %s" % (
            self.script_upload_path,
            self.mounts[0].mountpoint)
        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),
                        "Reads failed on mountpoint %s"
                        % self.mounts[0].mountpoint)

        # bring down brick1 and brick2 for all the subvolumes
        for i in range(0, num_subvols):
            subvol_brick_list = subvols_dict['volume_subvols'][i]
            g.log.info("sub-volume %s brick list : %s", i, subvol_brick_list)
            bricks_to_bring_offline = subvol_brick_list[0:2]
            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)

        # start I/0 ( write and read ) - read and write will fail
        all_mounts_procs = []
        g.log.info("Start creating file on mountpoint %s",
                   self.mounts[0].mountpoint)
        cmd = ("dd if=/dev/urandom of=%s/new_test_file bs=1M count=1"
               % self.mounts[0].mountpoint)
        proc = g.run_async(self.mounts[0].client_system, cmd,
                           user=self.mounts[0].user)
        all_mounts_procs.append(proc)

        # Validate IO
        g.log.info("Validating whether IO failed with "
                   "Transport endpoint is not connected")
        ret, _ = is_io_procs_fail_with_error(self, all_mounts_procs,
                                             self.mounts, self.mount_type)
        self.assertTrue(ret, ("Unexpected error and IO successful"
                              " on not connected transport endpoint"))
        g.log.info("EXPECTED: Transport endpoint is not connected"
                   " while creating files")

        # read the file
        g.log.info("Start reading files on mountpoint %s",
                   self.mounts[0].mountpoint)
        all_mounts_procs = []
        g.log.info("Starting reading file")
        cmd = ("cat %s/file1.txt" % self.mounts[0].mountpoint)
        proc = g.run_async(self.mounts[0].client_system, cmd,
                           user=self.mounts[0].user)
        all_mounts_procs.append(proc)

        # Validate IO
        g.log.info("Validating whether IO failed with "
                   "Transport endpoint is not connected")
        ret, _ = is_io_procs_fail_with_error(self, all_mounts_procs,
                                             self.mounts, self.mount_type)
        self.assertTrue(ret, ("Unexpected error and IO successful"
                              " on not connected transport endpoint"))
        g.log.info("EXPECTED: Transport endpoint is not connected"
                   " while reading file")

        # set the cluster.quorum-count to 1
        options = {"cluster.quorum-count": "1"}
        g.log.info("setting %s for the volume %s", options, self.volname)
        ret = set_volume_options(self.mnode, self.volname, options)
        self.assertTrue(ret, "Unable to set %s for volume %s"
                        % (options, self.volname))
        g.log.info("Successfully set %s for volume %s", options, self.volname)

        # start I/0 ( write and read ) - read and write will fail
        g.log.info("Start creating files on mountpoint %s",
                   self.mounts[0].mountpoint)
        all_mounts_procs = []
        cmd = ("dd if=/dev/urandom of=%s/new_test_file bs=1M count=1"
               % self.mounts[0].mountpoint)
        proc = g.run_async(self.mounts[0].client_system, cmd,
                           user=self.mounts[0].user)
        all_mounts_procs.append(proc)

        # Validate IO
        g.log.info("Validating whether IO failed with "
                   "Transport endpoint is not connected")
        ret, _ = is_io_procs_fail_with_error(self, all_mounts_procs,
                                             self.mounts, self.mount_type)
        self.assertTrue(ret, ("Unexpected error and IO successful"
                              " on not connected transport endpoint"))
        g.log.info("EXPECTED: Transport endpoint is not connected"
                   " while creating files")

        # read the file
        g.log.info("Start reading files on mountpoint %s",
                   self.mounts[0].mountpoint)
        all_mounts_procs = []
        cmd = ("cat %s/file1.txt" % self.mounts[0].mountpoint)
        proc = g.run_async(self.mounts[0].client_system, cmd,
                           user=self.mounts[0].user)
        all_mounts_procs.append(proc)

        # Validate IO
        g.log.info("Validating whether IO failed with "
                   "Transport endpoint is not connected")
        ret, _ = is_io_procs_fail_with_error(self, all_mounts_procs,
                                             self.mounts, self.mount_type)
        self.assertTrue(ret, ("Unexpected error and IO successful"
                              " on not connected transport endpoint"))
        g.log.info("EXPECTED: Transport endpoint is not connected"
                   " while reading file")

        # set the cluster.quorum-count to 3
        options = {"cluster.quorum-count": "3"}
        g.log.info("setting %s for the volume %s", options, self.volname)
        ret = set_volume_options(self.mnode, self.volname, options)
        self.assertTrue(ret, "Unable to set %s for volume %s"
                        % (options, self.volname))
        g.log.info("Successfully set %s for volume %s", options, self.volname)

        # start I/0 ( write and read ) - read and write will fail
        g.log.info("Start creating files on mountpoint %s",
                   self.mounts[0].mountpoint)
        all_mounts_procs = []
        cmd = ("dd if=/dev/urandom of=%s/new_test_file bs=1M count=1"
               % self.mounts[0].mountpoint)
        proc = g.run_async(self.mounts[0].client_system, cmd,
                           user=self.mounts[0].user)
        all_mounts_procs.append(proc)

        # Validate IO
        g.log.info("Validating whether IO failed with "
                   "Transport endpoint is not connected")
        ret, _ = is_io_procs_fail_with_error(self, all_mounts_procs,
                                             self.mounts, self.mount_type)
        self.assertTrue(ret, ("Unexpected error and IO successful"
                              " on not connected transport endpoint"))
        g.log.info("EXPECTED: Transport endpoint is not connected"
                   " while creating files")

        # read the file
        g.log.info("Start reading files on mountpoint %s",
                   self.mounts[0].mountpoint)
        all_mounts_procs = []
        cmd = ("cat %s/file1.txt" % self.mounts[0].mountpoint)
        proc = g.run_async(self.mounts[0].client_system, cmd,
                           user=self.mounts[0].user)
        all_mounts_procs.append(proc)

        # Validate IO
        g.log.info("Validating whether IO failed with "
                   "Transport endpoint is not connected")
        ret, _ = is_io_procs_fail_with_error(self, all_mounts_procs,
                                             self.mounts, self.mount_type)
        self.assertTrue(ret, ("Unexpected error and IO successful"
                              " on not connected transport endpoint"))
        g.log.info("EXPECTED: Transport endpoint is not connected"
                   " while reading file")

        # set the quorum-type to none
        options = {"cluster.quorum-type": "none"}
        g.log.info("setting %s for the volume %s", options, self.volname)
        ret = set_volume_options(self.mnode, self.volname, options)
        self.assertTrue(ret, "Unable to set %s for volume %s"
                        % (options, self.volname))
        g.log.info("Successfully set %s for volume %s",
                   options, self.volname)

        # start I/0 ( write and read ) - must succeed
        g.log.info("Starting IO on mountpoint %s", self.mounts[0].mountpoint)
        all_mounts_procs = []
        cmd = ("/usr/bin/env python %s create_files "
               "-f 10 --base-file-name lastfile %s" % (
                   self.script_upload_path,
                   self.mounts[0].mountpoint))
        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 mountpoint %s"
                        % self.mounts[0].mountpoint)

        # read the file
        g.log.info("Start reading files on mountpoint %s",
                   self.mounts[0].mountpoint)
        all_mounts_procs = []
        cmd = "/usr/bin/env python %s read %s" % (
            self.script_upload_path,
            self.mounts[0].mountpoint)
        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),
                        "Reads failed on mountpoint %s"
                        % self.mounts[0].mountpoint)