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path: root/tests/functional/glusterd/test_add_brick.py
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#  Copyright (C) 2016-2017  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.

import random
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.volume_libs import setup_volume, cleanup_volume
from glustolibs.gluster.volume_ops import (get_volume_list)
from glustolibs.gluster.brick_ops import add_brick
from glustolibs.gluster.lib_utils import form_bricks_list
from glustolibs.gluster.rebalance_ops import rebalance_start
from glustolibs.gluster.brick_libs import delete_bricks


@runs_on([['distributed-replicated'], ['glusterfs']])
class TestVolumeCreate(GlusterBaseClass):

    @classmethod
    def setUpClass(cls):

        # Calling GlusterBaseClass setUpClass
        cls.get_super_method(cls, 'setUpClass')()

        # check whether peers are in connected state
        if not cls.validate_peers_are_connected():
            raise ExecutionError("Peers are not in connected state")

    def tearDown(self):

        # clean up all volumes
        vol_list = get_volume_list(self.mnode)
        if vol_list is None:
            raise ExecutionError("Failed to get the volume list")

        for volume in vol_list:
            if not cleanup_volume(self.mnode, volume):
                raise ExecutionError("Unable to delete volume % s" % volume)
            g.log.info("Volume deleted successfully : %s", volume)

        # Checking brick dir and cleaning it.
        ret = delete_bricks(self.bricks_list)
        if not ret:
            raise ExecutionError("Failed to delete the brick dirs.")
        g.log.info("Successfully cleaned all the brick dirs.")

        self.get_super_method(self, 'tearDown')()

    def test_add_brick_functionality(self):

        # create and start volume
        self.assertTrue(
            setup_volume(self.mnode, self.all_servers_info, self.volume),
            "Failed to create and start volume %s" % self.volname)
        g.log.info("Volume created and started successfully")

        # form bricks list to test add brick functionality
        replica_count_of_volume = self.volume['voltype']['replica_count']
        num_of_bricks = 4 * replica_count_of_volume
        self.bricks_list = form_bricks_list(self.mnode, self.volname,
                                            num_of_bricks,
                                            self.servers,
                                            self.all_servers_info)
        self.assertIsNotNone(self.bricks_list, "Bricks list is None")

        # Try to add a single brick to volume, which should fail as it is a
        # replicated volume, we should pass multiple of replica count number
        # of bricks
        self.assertNotEqual(
            add_brick(self.mnode, self.volname, self.bricks_list[0])[0], 0,
            "Expected: It should fail to add a single brick to a replicated "
            "volume. Actual: Successfully added single brick to volume")
        g.log.info("Failed to add a single brick to replicated volume "
                   "(as expected)")

        # add brick replica count number of bricks in which one is a
        # non existing brick (not using the brick used in the earlier test)
        kwargs = {'replica_count': replica_count_of_volume}
        bricks_to_add = self.bricks_list[1:replica_count_of_volume + 1]
        # make one of the bricks a non-existing one (randomly)
        random_index = random.randint(0, replica_count_of_volume - 1)
        bricks_to_add[random_index] += "/non_existing_brick"

        self.assertNotEqual(
            add_brick(self.mnode, self.volname, bricks_to_add, **kwargs)[0], 0,
            "Expected: It should fail to add a non existing brick to volume. "
            "Actual: Successfully added a non existing brick to volume")
        g.log.info("Failed to add a non existing brick to volume "
                   "(as expected)")

        # add a brick from a node which is not a part of the cluster
        # (not using bricks used in earlier tests)
        bricks_to_add = self.bricks_list[replica_count_of_volume + 1:
                                         (2 * replica_count_of_volume) + 1]
        # change one (random) brick's node name to a non existent node
        random_index = random.randint(0, replica_count_of_volume - 1)
        brick_to_change = bricks_to_add[random_index].split(":")
        brick_to_change[0] = "abc.def.ghi.jkl"
        bricks_to_add[random_index] = ":".join(brick_to_change)
        self.assertNotEqual(
            add_brick(self.mnode, self.volname, bricks_to_add, **kwargs)[0], 0,
            "Expected: It should fail to add brick from a node which is not "
            "part of a cluster. Actual: Successfully added bricks from node "
            "which is not a part of cluster to volume")
        g.log.info("Failed to add bricks from node which is not a part of "
                   "cluster to volume (as expected)")

        # add correct number of valid bricks, it should succeed
        # (not using bricks used in earlier tests)
        bricks_to_add = self.bricks_list[(2 * replica_count_of_volume) + 1:
                                         (3 * replica_count_of_volume) + 1]
        self.assertEqual(
            add_brick(self.mnode, self.volname, bricks_to_add, **kwargs)[0], 0,
            "Failed to add the bricks to the volume")
        g.log.info("Successfully added bricks to volume")

        # Perform rebalance start operation
        self.assertEqual(rebalance_start(self.mnode, self.volname)[0], 0,
                         "Rebalance start failed")