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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 random import choice
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.brick_ops import add_brick
from glustolibs.gluster.brick_libs import get_all_bricks
from glustolibs.gluster.glusterfile import get_fattr
from glustolibs.gluster.rebalance_ops import (rebalance_start,
wait_for_fix_layout_to_complete)
from glustolibs.gluster.volume_libs import (form_bricks_list_to_add_brick,
replace_brick_from_volume)
@runs_on([['distributed-replicated', 'distributed-arbiter'], ['glusterfs']])
class TestAddBrickReplaceBrickFixLayout(GlusterBaseClass):
def setUp(self):
self.get_super_method(self, 'setUp')()
# Changing dist_count to 3
self.volume['voltype']['dist_count'] = 3
# 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.first_client = self.mounts[0].client_system
def tearDown(self):
# 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 _replace_a_old_added_brick(self, brick_to_be_replaced):
"""Replace a old brick from the volume"""
ret = replace_brick_from_volume(self.mnode, self.volname,
self.servers, self.all_servers_info,
src_brick=brick_to_be_replaced)
self.assertTrue(ret, "Failed to replace brick %s "
% brick_to_be_replaced)
g.log.info("Successfully replaced brick %s", brick_to_be_replaced)
def _check_trusted_glusterfs_dht_on_all_bricks(self):
"""Check trusted.glusterfs.dht xattr on the backend bricks"""
bricks = get_all_bricks(self.mnode, self.volname)
fattr_value = []
for brick_path in bricks:
node, path = brick_path.split(":")
ret = get_fattr(node, "{}".format(path), "trusted.glusterfs.dht")
fattr_value += [ret]
self.assertEqual(len(set(fattr_value)), 4,
"Value of trusted.glusterfs.dht is not as expected")
g.log.info("Successfully checked value of trusted.glusterfs.dht.")
def test_add_brick_replace_brick_fix_layout(self):
"""
Test case:
1. Create a volume, start it and mount it.
2. Create files and dirs on the mount point.
3. Add bricks to the volume.
4. Replace 2 old bricks to the volume.
5. Trigger rebalance fix layout and wait for it to complete.
6. Check layout on all the bricks through trusted.glusterfs.dht.
"""
# Create directories with some files on mount point
cmd = ("cd %s; for i in {1..10}; do mkdir dir$i; for j in {1..5};"
" do dd if=/dev/urandom of=dir$i/file$j bs=1M count=1; done;"
" done" % self.mounts[0].mountpoint)
ret, _, _ = g.run(self.first_client, cmd)
self.assertFalse(ret, "Failed to create dirs and files.")
# Orginal brick list before add brick
brick_list = get_all_bricks(self.mnode, self.volname)
self.assertIsNotNone(brick_list, "Empty present brick list")
# Add bricks to the volume
add_brick_list = form_bricks_list_to_add_brick(
self.mnode, self.volname, self.servers, self.all_servers_info)
self.assertIsNotNone(add_brick_list, "Empty add brick list")
ret, _, _ = add_brick(self.mnode, self.volname, add_brick_list)
self.assertFalse(ret, "Failed to add bricks to the volume")
g.log.info("Successfully added bricks to the volume")
# Replace 2 old bricks to the volume
for _ in range(0, 2):
brick = choice(brick_list)
self._replace_a_old_added_brick(brick)
brick_list.remove(brick)
# Start rebalance and wait for it to complete
ret, _, _ = rebalance_start(self.mnode, self.volname, fix_layout=True)
self.assertFalse(ret, "Failed to start rebalance on volume")
ret = wait_for_fix_layout_to_complete(self.mnode, self.volname,
timeout=800)
self.assertTrue(ret, "Rebalance failed on volume")
# Check layout on all the bricks through trusted.glusterfs.dht
self._check_trusted_glusterfs_dht_on_all_bricks()
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