# Copyright (C) 2020 Red Hat, Inc. # # 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. # pylint: disable=too-many-statements, too-many-locals 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, wait_for_bricks_to_be_online) from glustolibs.misc.misc_libs import upload_scripts from glustolibs.gluster.volume_ops import set_volume_options from glustolibs.io.utils import validate_io_procs from glustolibs.gluster.heal_libs import is_volume_in_split_brain from glustolibs.gluster.volume_libs import get_subvols @runs_on([['arbiter', 'distributed-arbiter'], ['glusterfs']]) class TestSplitBrain(GlusterBaseClass): @classmethod def setUpClass(cls): # Calling GlusterBaseClass setUpClass cls.get_super_method(cls, 'setUpClass')() # Upload io scripts for running IO on mounts 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 %s" % cls.clients) # Setup Volume and Mount Volume ret = cls.setup_volume_and_mount_volume(cls.mounts, True) if not ret: raise ExecutionError("Failed to Setup_Volume and Mount_Volume") @classmethod def tearDownClass(cls): """ Cleanup Volume """ ret = cls.unmount_volume_and_cleanup_volume(cls.mounts) if not ret: raise ExecutionError("Failed to create volume") cls.get_super_method(cls, 'tearDownClass')() def _bring_bricks_online(self): """ Bring bricks online and monitor heal completion """ # Bring bricks online ret = bring_bricks_online( self.mnode, self.volname, self.bricks_to_bring_offline, bring_bricks_online_methods=['volume_start_force']) self.assertTrue(ret, 'Failed to bring bricks online') # Wait for volume processes to be online ret = wait_for_bricks_to_be_online(self.mnode, self.volname) self.assertTrue(ret, ("Failed to wait for volume {} processes to " "be online".format(self.volname))) def test_split_brain(self): """ Description: Create split-brain on files and check if IO's fail - Disable self-heal and cluster-quorum-type - Get the bricks from the volume - Write IO and validate IO - Bring 1st set of brick offline(1 Data brick and arbiter brick) - Write IO and validate IO - Bring 2nd set of bricks offline(1 Data brick and arbiter brick) - Write IO and validate IO - Check volume is in split-brain - Write IO and validate IO - should fail - Enable self-heal and cluster-quorum-type - Write IO and validate IO - should fail """ # Disable self-heal and cluster-quorum-type options = {"self-heal-daemon": "off", "cluster.quorum-type": "none"} ret = set_volume_options(self.mnode, self.volname, options) self.assertTrue(ret, ("Unable to set volume option %s for " "volume %s" % (options, self.volname))) # Get the bricks from the volume sub_vols = get_subvols(self.mnode, self.volname) self.bricks_to_bring_offline = list(sub_vols['volume_subvols'][0]) # Write IO's write_cmd = ("/usr/bin/env python %s create_files -f 1 " "--base-file-name test_file --fixed-file-size 1k %s" % (self.script_upload_path, self.mounts[0].mountpoint)) ret, _, _ = g.run(self.mounts[0].client_system, write_cmd) # Bring 1st set of brick offline(1 Data brick and arbiter brick) for bricks in ((0, -1), (1, -1)): down_bricks = [] for brick in bricks: down_bricks.append(self.bricks_to_bring_offline[brick]) ret = bring_bricks_offline(self.volname, down_bricks) self.assertTrue(ret, 'Failed to bring bricks {} offline'. format(down_bricks)) proc = g.run_async(self.mounts[0].client_system, write_cmd) # Validate I/O self.assertTrue( validate_io_procs([proc], self.mounts), "IO failed on some of the clients" ) # Bring bricks online self._bring_bricks_online() # Check volume is in split-brain ret = is_volume_in_split_brain(self.mnode, self.volname) self.assertTrue(ret, "unable to create split-brain scenario") g.log.info("Successfully created split brain scenario") # Write IO's proc2 = g.run_async(self.mounts[0].client_system, write_cmd) # Validate I/O self.assertFalse( validate_io_procs([proc2], self.mounts), "IO passed on split-brain" ) g.log.info("Expected - IO's failed due to split-brain") # Enable self-heal and cluster-quorum-type options = {"self-heal-daemon": "on", "cluster.quorum-type": "auto"} ret = set_volume_options(self.mnode, self.volname, options) self.assertTrue(ret, ("Unable to set volume option %s for " "volume %s" % (options, self.volname))) # Write IO's proc3 = g.run_async(self.mounts[0].client_system, write_cmd) # Validate I/O self.assertFalse( validate_io_procs([proc3], self.mounts), "IO passed on split-brain" ) g.log.info("Expected - IO's failed due to split-brain")