summaryrefslogtreecommitdiffstats
path: root/glustolibs-gluster/glustolibs/gluster/gluster_base_class.py
blob: 73a6c4c1e370ceae90ebef948414efd2e3a3ba1d (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
#  Copyright (C) 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: Module containing GlusterBaseClass which defines all the
        variables necessary for tests.
"""

import unittest
import os
import random
import copy
import datetime
import time
import socket
from glusto.core import Glusto as g
from glustolibs.gluster.exceptions import ConfigError, ExecutionError
from glustolibs.gluster.peer_ops import is_peer_connected, peer_status
from glustolibs.gluster.volume_ops import set_volume_options
from glustolibs.gluster.block_ops import block_delete
from glustolibs.gluster.block_libs import (setup_block, if_block_exists,
                                           get_block_list,
                                           get_block_info)
from glustolibs.gluster.volume_libs import (setup_volume,
                                            cleanup_volume,
                                            log_volume_info_and_status)
from glustolibs.gluster.volume_libs import (
    wait_for_volume_process_to_be_online)
from glustolibs.gluster.samba_libs import share_volume_over_smb
from glustolibs.gluster.nfs_libs import export_volume_through_nfs
from glustolibs.gluster.mount_ops import create_mount_objs
from glustolibs.io.utils import log_mounts_info
from glustolibs.gluster.lib_utils import inject_msg_in_logs


class runs_on(g.CarteTestClass):
    """Decorator providing runs_on capability for standard unittest script"""

    def __init__(self, value):
        # the names of the class attributes set by the runs_on decorator
        self.axis_names = ['volume_type', 'mount_type']

        # the options to replace 'ALL' in selections
        self.available_options = [['distributed', 'replicated',
                                   'distributed-replicated',
                                   'dispersed', 'distributed-dispersed'],
                                  ['glusterfs', 'nfs', 'cifs', 'smb']]

        # these are the volume and mount options to run and set in config
        # what do runs_on_volumes and runs_on_mounts need to be named????
        run_on_volumes = self.available_options[0]
        run_on_mounts = self.available_options[1]
        if 'gluster' in g.config and g.config['gluster']:
            if ('running_on_volumes' in g.config['gluster'] and
                    g.config['gluster']['running_on_volumes']):
                run_on_volumes = g.config['gluster']['running_on_volumes']

            if ('running_on_mounts' in g.config['gluster'] and
                    g.config['gluster']['running_on_mounts']):
                run_on_mounts = g.config['gluster']['running_on_mounts']
        # selections is the above info from the run that is intersected with
        # the limits from the test script
        self.selections = [run_on_volumes, run_on_mounts]

        # value is the limits that are passed in by the decorator
        self.limits = value


class GlusterBaseClass(unittest.TestCase):
    """GlusterBaseClass to be subclassed by Gluster Tests.
    This class reads the config for variable values that will be used in
    gluster tests. If variable values are not specified in the config file,
    the variable are defaulted to specific values.
    """
    # these will be populated by either the runs_on decorator or
    # defaults in setUpClass()
    volume_type = None
    mount_type = None

    @classmethod
    def inject_msg_in_gluster_logs(cls, msg):
        """Inject all the gluster logs on servers, clients with msg

        Args:
            msg (str): Message string to be injected

        Returns:
            bool: True if injecting msg on the log files/dirs is successful.
                False Otherwise.
        """
        _rc = True
        # Inject msg on server gluster logs
        ret = inject_msg_in_logs(cls.servers, log_msg=msg,
                                 list_of_dirs=cls.server_gluster_logs_dirs,
                                 list_of_files=cls.server_gluster_logs_files)
        if not ret:
            _rc = False

        if cls.mount_type is not None and "glusterfs" in cls.mount_type:
            ret = inject_msg_in_logs(
                cls.clients, log_msg=msg,
                list_of_dirs=cls.client_gluster_logs_dirs,
                list_of_files=cls.client_gluster_logs_files)
            if not ret:
                _rc = False
        return _rc

    @classmethod
    def get_ip_from_hostname(cls, nodes):
        """Returns list of IP's for the list of nodes in order.

        Args:
            nodes(list): List of nodes hostnames

        Returns:
            list: List of IP's corresponding to the hostnames of nodes.
        """
        nodes_ips = []
        if isinstance(nodes, str):
            nodes = [nodes]
        for node in nodes:
            try:
                ip = socket.gethostbyname(node)
            except socket.gaierror as e:
                g.log.error("Failed to get the IP of Host: %s : %s", node,
                            e.strerror)
                ip = None
            nodes_ips.append(ip)
        return nodes_ips

    @classmethod
    def validate_peers_are_connected(cls):
        """Validate whether each server in the cluster is connected to
        all other servers in cluster.

        Returns (bool): True if all peers are in connected with other peers.
            False otherwise.
        """
        # Validate if peer is connected from all the servers
        g.log.info("Validating if servers %s are connected from other servers "
                   "in the cluster", cls.servers)
        for server in cls.servers:
            g.log.info("Validate servers %s are in connected from  node %s",
                       cls.servers, server)
            ret = is_peer_connected(server, cls.servers)
            if not ret:
                g.log.error("Some or all servers %s are not in connected "
                            "state from node %s", cls.servers, server)
                return False
            g.log.info("Successfully validated servers %s are all in "
                       "connected state from node %s",
                       cls.servers, server)
        g.log.info("Successfully validated all servers %s are in connected "
                   "state from other servers in the cluster", cls.servers)

        # Peer Status from mnode
        peer_status(cls.mnode)

        return True

    @classmethod
    def setup_volume(cls, volume_create_force=False):
        """Setup the volume:
            - Create the volume, Start volume, Set volume
            options, enable snapshot/quota/tier if specified in the config
            file.
            - Wait for volume processes to be online
            - Export volume as NFS/SMB share if mount_type is NFS or SMB
            - Log volume info and status

        Args:
            volume_create_force(bool): True if create_volume should be
                executed with 'force' option.

        Returns (bool): True if all the steps mentioned in the descriptions
            passes. False otherwise.
        """
        force_volume_create = False
        if volume_create_force or cls.volume_create_force:
            force_volume_create = True

        # Validate peers before setting up volume
        g.log.info("Validate peers before setting up volume ")
        ret = cls.validate_peers_are_connected()
        if not ret:
            g.log.error("Failed to validate peers are in connected state "
                        "before setting up volume")
            return False
        g.log.info("Successfully validated peers are in connected state "
                   "before setting up volume")

        # Setup Volume
        g.log.info("Setting up volume %s", cls.volname)
        ret = setup_volume(mnode=cls.mnode,
                           all_servers_info=cls.all_servers_info,
                           volume_config=cls.volume, force=force_volume_create)
        if not ret:
            g.log.error("Failed to Setup volume %s", cls.volname)
            return False
        g.log.info("Successful in setting up volume %s", cls.volname)

        # Wait for volume processes to be online
        g.log.info("Wait for volume %s processes to be online", cls.volname)
        ret = wait_for_volume_process_to_be_online(cls.mnode, cls.volname)
        if not ret:
            g.log.error("Failed to wait for volume %s processes to "
                        "be online", cls.volname)
            return False
        g.log.info("Successful in waiting for volume %s processes to be "
                   "online", cls.volname)

        # Export/Share the volume based on mount_type
        if cls.mount_type != "glusterfs":
            g.log.info("Export/Sharing the volume %s", cls.volname)
            if "nfs" in cls.mount_type:
                ret = export_volume_through_nfs(
                    mnode=cls.mnode, volname=cls.volname,
                    enable_ganesha=cls.enable_nfs_ganesha)
                if not ret:
                    g.log.error("Failed to export volume %s "
                                "as NFS export", cls.volname)
                    return False
                g.log.info("Successful in exporting the volume %s "
                           "as NFS export", cls.volname)

                # Set NFS-Ganesha specific volume options
                if cls.enable_nfs_ganesha and cls.nfs_ganesha_export_options:
                    g.log.info("Setting NFS-Ganesha export specific "
                               "volume options on volume %s", cls.volname)
                    ret = set_volume_options(
                        mnode=cls.mnode, volname=cls.volname,
                        options=cls.nfs_ganesha_export_options)
                    if not ret:
                        g.log.error("Failed to set NFS-Ganesha "
                                    "export specific options on "
                                    "volume %s", cls.volname)
                        return False
                    g.log.info("Successful in setting NFS-Ganesha export "
                               "specific volume options on volume %s",
                               cls.volname)

            if "smb" in cls.mount_type or "cifs" in cls.mount_type:
                ret = share_volume_over_smb(mnode=cls.mnode,
                                            volname=cls.volname,
                                            smb_users_info=cls.smb_users_info)
                if not ret:
                    g.log.error("Failed to export volume %s "
                                "as SMB Share", cls.volname)
                    return False
                g.log.info("Successful in exporting volume %s as SMB Share",
                           cls.volname)

                # Set SMB share specific volume options
                if cls.smb_share_options:
                    g.log.info("Setting SMB share specific volume options "
                               "on volume %s", cls.volname)
                    ret = set_volume_options(mnode=cls.mnode,
                                             volname=cls.volname,
                                             options=cls.smb_share_options)
                    if not ret:
                        g.log.error("Failed to set SMB share "
                                    "specific options "
                                    "on volume %s", cls.volname)
                        return False
                    g.log.info("Successful in setting SMB share specific "
                               "volume options on volume %s", cls.volname)

        # Log Volume Info and Status
        g.log.info("Log Volume %s Info and Status", cls.volname)
        ret = log_volume_info_and_status(cls.mnode, cls.volname)
        if not ret:
            g.log.error("Logging volume %s info and status failed",
                        cls.volname)
            return False
        g.log.info("Successful in logging volume %s info and status",
                   cls.volname)

        return True

    @classmethod
    def mount_volume(cls, mounts):
        """Mount volume

        Args:
            mounts(list): List of mount_objs

        Returns (bool): True if mounting the volume for a mount obj is
            successful. False otherwise
        """
        g.log.info("Starting to mount volume %s", cls.volname)
        for mount_obj in mounts:
            g.log.info("Mounting volume '%s:%s' on '%s:%s'",
                       mount_obj.server_system, mount_obj.volname,
                       mount_obj.client_system, mount_obj.mountpoint)
            ret = mount_obj.mount()
            if not ret:
                g.log.error("Failed to mount volume '%s:%s' on '%s:%s'",
                            mount_obj.server_system, mount_obj.volname,
                            mount_obj.client_system, mount_obj.mountpoint)
                return False
            else:
                g.log.info("Successful in mounting volume '%s:%s' on "
                           "'%s:%s'", mount_obj.server_system,
                           mount_obj.volname, mount_obj.client_system,
                           mount_obj.mountpoint)
        g.log.info("Successful in mounting all mount objs for the volume %s",
                   cls.volname)

        # Get mounts info
        g.log.info("Get mounts Info:")
        log_mounts_info(mounts)

        return True

    @classmethod
    def setup_volume_and_mount_volume(cls, mounts, volume_create_force=False):
        """Setup the volume and mount the volume

        Args:
            mounts(list): List of mount_objs
            volume_create_force(bool): True if create_volume should be
                executed with 'force' option.

        Returns (bool): True if setting up volume and mounting the volume
            for a mount obj is successful. False otherwise
        """
        # Setup Volume
        _rc = cls.setup_volume(volume_create_force)
        if not _rc:
            return _rc

        # Mount Volume
        _rc = cls.mount_volume(mounts)
        if not _rc:
            return _rc

        return True

    @classmethod
    def unmount_volume(cls, mounts):
        """Unmount all mounts for the volume

        Args:
            mounts(list): List of mount_objs

        Returns (bool): True if unmounting the volume for a mount obj is
            successful. False otherwise
        """
        # Unmount volume
        g.log.info("Starting to UnMount Volume %s", cls.volname)
        for mount_obj in mounts:
            g.log.info("UnMounting volume '%s:%s' on '%s:%s'",
                       mount_obj.server_system, mount_obj.volname,
                       mount_obj.client_system, mount_obj.mountpoint)
            ret = mount_obj.unmount()
            if not ret:
                g.log.error("Failed to unmount volume '%s:%s' on '%s:%s'",
                            mount_obj.server_system, mount_obj.volname,
                            mount_obj.client_system, mount_obj.mountpoint)

                # Get mounts info
                g.log.info("Get mounts Info:")
                log_mounts_info(cls.mounts)

                return False
            else:
                g.log.info("Successful in unmounting volume '%s:%s' on "
                           "'%s:%s'", mount_obj.server_system,
                           mount_obj.volname, mount_obj.client_system,
                           mount_obj.mountpoint)
        g.log.info("Successful in unmounting all mount objs for the volume %s",
                   cls.volname)

        # Get mounts info
        g.log.info("Get mounts Info:")
        log_mounts_info(mounts)

        return True

    @classmethod
    def cleanup_volume(cls):
        """Cleanup the volume

        Returns (bool): True if cleanup volume is successful. False otherwise.
        """
        g.log.info("Cleanup Volume %s", cls.volname)
        ret = cleanup_volume(mnode=cls.mnode, volname=cls.volname)
        if not ret:
            g.log.error("cleanup of volume %s failed", cls.volname)
        else:
            g.log.info("Successfully cleaned-up volume %s", cls.volname)

        # Log Volume Info and Status
        g.log.info("Log Volume %s Info and Status", cls.volname)
        log_volume_info_and_status(cls.mnode, cls.volname)

        return ret

    @classmethod
    def unmount_volume_and_cleanup_volume(cls, mounts):
        """Unmount the volume and cleanup volume

        Args:
            mounts(list): List of mount_objs

        Returns (bool): True if unmounting the volume for the mounts and
            cleaning up volume is successful. False otherwise
        """
        # UnMount Volume
        _rc = cls.unmount_volume(mounts)
        if not _rc:
            return _rc

        # Setup Volume
        _rc = cls.cleanup_volume()
        if not _rc:
            return _rc

        return True

    @classmethod
    def setUpClass(cls):
        """Initialize all the variables necessary for testing Gluster
        """
        # Get all servers
        cls.all_servers = None
        if 'servers' in g.config and g.config['servers']:
            cls.all_servers = g.config['servers']
            cls.servers = cls.all_servers
        else:
            raise ConfigError("'servers' not defined in the global config")

        # Get all clients
        cls.all_clients = None
        if 'clients' in g.config and g.config['clients']:
            cls.all_clients = g.config['clients']
            cls.clients = cls.all_clients
        else:
            raise ConfigError("'clients' not defined in the global config")

        # Get all servers info
        cls.all_servers_info = None
        if 'servers_info' in g.config and g.config['servers_info']:
            cls.all_servers_info = g.config['servers_info']
        else:
            raise ConfigError("'servers_info' not defined in the global "
                              "config")

        # All clients_info
        cls.all_clients_info = None
        if 'clients_info' in g.config and g.config['clients_info']:
            cls.all_clients_info = g.config['clients_info']
        else:
            raise ConfigError("'clients_info' not defined in the global "
                              "config")

        # Set mnode : Node on which gluster commands are executed
        cls.mnode = cls.all_servers[0]

        # Server IP's
        cls.servers_ips = []
        cls.servers_ips = cls.get_ip_from_hostname(cls.servers)

        # SMB Cluster info
        try:
            cls.smb_users_info = (
                g.config['gluster']['cluster_config']['smb']['users_info'])
        except KeyError:
            cls.smb_users_info = {}
            cls.smb_users_info['root'] = {}
            cls.smb_users_info['root']['password'] = 'foobar'
            cls.smb_users_info['root']['acl'] = 'rwx'

        # NFS-Ganesha Cluster info
        try:
            cls.enable_nfs_ganesha = bool(g.config['gluster']['cluster_config']
                                          ['nfs_ganesha']['enable'])
            cls.num_of_nfs_ganesha_nodes = (g.config['gluster']
                                            ['cluster_config']['nfs_ganesha']
                                            ['num_of_nfs_ganesha_nodes'])
            cls.vips = (g.config['gluster']['cluster_config']['nfs_ganesha']
                        ['vips'])
        except KeyError:
            cls.enable_nfs_ganesha = False
            cls.num_of_nfs_ganesha_nodes = None
            cls.vips = []

        # Defining default volume_types configuration.
        cls.default_volume_type_config = {
            'replicated': {
                'type': 'replicated',
                'replica_count': 3,
                'transport': 'tcp'
                },
            'dispersed': {
                'type': 'dispersed',
                'disperse_count': 6,
                'redundancy_count': 2,
                'transport': 'tcp'
                },
            'distributed': {
                'type': 'distributed',
                'dist_count': 4,
                'transport': 'tcp'
                },
            'distributed-replicated': {
                'type': 'distributed-replicated',
                'dist_count': 2,
                'replica_count': 3,
                'transport': 'tcp'
                },
            'distributed-dispersed': {
                'type': 'distributed-dispersed',
                'dist_count': 2,
                'disperse_count': 6,
                'redundancy_count': 2,
                'transport': 'tcp'
                }
            }

        # Check if default volume_type configuration is provided in
        # config yml
        if (g.config.get('gluster') and
                g.config['gluster'].get('volume_types')):
            default_volume_type_from_config = (
                g.config['gluster']['volume_types'])

            for volume_type in default_volume_type_from_config.keys():
                if default_volume_type_from_config[volume_type]:
                    if volume_type in cls.default_volume_type_config:
                        cls.default_volume_type_config[volume_type] = (
                            default_volume_type_from_config[volume_type])

        # Create Volume with force option
        cls.volume_create_force = False
        if (g.config.get('gluster') and
                g.config['gluster'].get('volume_create_force')):
            cls.volume_create_force = (
                g.config['gluster']['volume_create_force'])

        # Default volume options which is applicable for all the volumes
        cls.volume_options = {}
        if (g.config.get('gluster') and
                g.config['gluster'].get('volume_options')):
            cls.volume_options = g.config['gluster']['volume_options']

        # If the volume is exported as SMB Share, then set the following
        # volume options on the share.
        cls.smb_share_options = {}
        if (g.config.get('gluster') and
                g.config['gluster'].get('smb_share_options')):
            cls.smb_share_options = (
                g.config['gluster']['smb_share_options'])

        # If the volume is exported as NFS-Ganesha export,
        # then set the following volume options on the export.
        cls.nfs_ganesha_export_options = {}
        if (g.config.get('gluster') and
                g.config['gluster'].get('nfs_ganesha_export_options')):
            cls.nfs_ganesha_export_options = (
                g.config['gluster']['nfs_ganesha_export_options'])

        # Get the volume configuration.
        cls.volume = {}
        if cls.volume_type:
            found_volume = False
            if 'gluster' in g.config:
                if 'volumes' in g.config['gluster']:
                    for volume in g.config['gluster']['volumes']:
                        if volume['voltype']['type'] == cls.volume_type:
                            cls.volume = copy.deepcopy(volume)
                            found_volume = True
                            break

            if found_volume:
                if 'name' not in cls.volume:
                    cls.volume['name'] = 'testvol_%s' % cls.volume_type

                if 'servers' not in cls.volume:
                    cls.volume['servers'] = cls.all_servers

            if not found_volume:
                try:
                    if g.config['gluster']['volume_types'][cls.volume_type]:
                        cls.volume['voltype'] = (g.config['gluster']
                                                 ['volume_types']
                                                 [cls.volume_type])
                except KeyError:
                    try:
                        cls.volume['voltype'] = (cls.default_volume_type_config
                                                 [cls.volume_type])
                    except KeyError:
                        raise ConfigError("Unable to get configs of volume "
                                          "type: %s", cls.volume_type)
                cls.volume['name'] = 'testvol_%s' % cls.volume_type
                cls.volume['servers'] = cls.all_servers

            # Set volume options
            if 'options' not in cls.volume:
                cls.volume['options'] = cls.volume_options

            # Define Volume Useful Variables.
            cls.volname = cls.volume['name']
            cls.voltype = cls.volume['voltype']['type']
            cls.servers = cls.volume['servers']
            cls.mnode = cls.servers[0]
            cls.vol_options = cls.volume['options']

        # Get the mount configuration.
        cls.mounts = []
        if cls.mount_type:
            cls.mounts_dict_list = []
            found_mount = False
            if 'gluster' in g.config:
                if 'mounts' in g.config['gluster']:
                    for mount in g.config['gluster']['mounts']:
                        if mount['protocol'] == cls.mount_type:
                            temp_mount = {}
                            temp_mount['protocol'] = cls.mount_type
                            if 'volname' in mount and mount['volname']:
                                if mount['volname'] == cls.volname:
                                    temp_mount = copy.deepcopy(mount)
                                else:
                                    continue
                            else:
                                temp_mount['volname'] = cls.volname
                            if ('server' not in mount or
                                    (not mount['server'])):
                                temp_mount['server'] = cls.mnode
                            else:
                                temp_mount['server'] = mount['server']
                            if ('mountpoint' not in mount or
                                    (not mount['mountpoint'])):
                                temp_mount['mountpoint'] = (os.path.join(
                                    "/mnt", '_'.join([cls.volname,
                                                      cls.mount_type])))
                            else:
                                temp_mount['mountpoint'] = mount['mountpoint']
                            if ('client' not in mount or
                                    (not mount['client'])):
                                temp_mount['client'] = (
                                    cls.all_clients_info[
                                        random.choice(
                                            cls.all_clients_info.keys())]
                                    )
                            else:
                                temp_mount['client'] = mount['client']
                            if 'options' in mount and mount['options']:
                                temp_mount['options'] = mount['options']
                            else:
                                temp_mount['options'] = ''
                            cls.mounts_dict_list.append(temp_mount)
                            found_mount = True

            if not found_mount:
                for client in cls.all_clients_info.keys():
                    mount = {
                        'protocol': cls.mount_type,
                        'server': cls.mnode,
                        'volname': cls.volname,
                        'client': cls.all_clients_info[client],
                        'mountpoint': (os.path.join(
                            "/mnt", '_'.join([cls.volname, cls.mount_type]))),
                        'options': ''
                        }
                    cls.mounts_dict_list.append(mount)

            if cls.mount_type == 'cifs' or cls.mount_type == 'smb':
                for mount in cls.mounts_dict_list:
                    if 'smbuser' not in mount:
                        mount['smbuser'] = random.choice(
                            cls.smb_users_info.keys())
                        mount['smbpasswd'] = (
                            cls.smb_users_info[mount['smbuser']]['password'])

            cls.mounts = create_mount_objs(cls.mounts_dict_list)

            # Defining clients from mounts.
            cls.clients = []
            for mount in cls.mounts_dict_list:
                cls.clients.append(mount['client']['host'])
            cls.clients = list(set(cls.clients))

        # Gluster Logs info
        cls.server_gluster_logs_dirs = ["/var/log/glusterfs",
                                        "/var/log/samba"]
        cls.server_gluster_logs_files = ["/var/log/ganesha.log",
                                         "/var/log/ganesha-gfapi.log"]
        if ('gluster' in g.config and
                'server_gluster_logs_info' in g.config['gluster']):
            server_gluster_logs_info = (
                g.config['gluster']['server_gluster_logs_info'])
            if ('dirs' in server_gluster_logs_info and
                    server_gluster_logs_info['dirs']):
                cls.server_gluster_logs_dirs = (
                    server_gluster_logs_info['dirs'])

            if ('files' in server_gluster_logs_info and
                    server_gluster_logs_info['files']):
                cls.server_gluster_logs_files = (
                    server_gluster_logs_info['files'])

        cls.client_gluster_logs_dirs = ["/var/log/glusterfs"]
        cls.client_gluster_logs_files = []
        if ('gluster' in g.config and
                'client_gluster_logs_info' in g.config['gluster']):
            client_gluster_logs_info = (
                g.config['gluster']['client_gluster_logs_info'])
            if ('dirs' in client_gluster_logs_info and
                    client_gluster_logs_info['dirs']):
                cls.client_gluster_logs_dirs = (
                    client_gluster_logs_info['dirs'])

            if ('files' in client_gluster_logs_info and
                    client_gluster_logs_info['files']):
                cls.client_gluster_logs_files = (
                    client_gluster_logs_info['files'])

        # Have a unique string to recognize the test run for logging in
        # gluster logs
        if 'glustotest_run_id' not in g.config:
            g.config['glustotest_run_id'] = (
                datetime.datetime.now().strftime('%H_%M_%d_%m_%Y'))
        cls.glustotest_run_id = g.config['glustotest_run_id']

        msg = "Setupclass: %s : %s" % (cls.__name__, cls.glustotest_run_id)
        g.log.info(msg)
        cls.inject_msg_in_gluster_logs(msg)

        # Log the baseclass variables for debugging purposes
        g.log.debug("GlusterBaseClass Variables:\n %s", cls.__dict__)

    def setUp(self):
        msg = "Starting Test : %s : %s" % (self.id(), self.glustotest_run_id)
        g.log.info(msg)
        self.inject_msg_in_gluster_logs(msg)

    def tearDown(self):
        msg = "Ending Test: %s : %s" % (self.id(), self.glustotest_run_id)
        g.log.info(msg)
        self.inject_msg_in_gluster_logs(msg)

    @classmethod
    def tearDownClass(cls):
        msg = "Teardownclass: %s : %s" % (cls.__name__, cls.glustotest_run_id)
        g.log.info(msg)
        cls.inject_msg_in_gluster_logs(msg)


class GlusterBlockBaseClass(GlusterBaseClass):
    """GlusterBlockBaseClass sets up the volume and blocks.
    """
    @classmethod
    def setup_blocks(cls, blocknames):
        """Create blocks and calls the methods:
        update_block_info_dict and create_client_block_map

        Args:
            blocknames(list): Blocks to be create
        Returns:
            bool: False if block creation is unsuccessful and
            true if all blocks created.

        """
        if not isinstance(blocknames, list):
            blocknames = [blocknames]

        g.log.info("Creating block devices on volume %s", cls.volname)
        for blockname in blocknames:
            each_block = cls.gluster_block_args_info.get(blockname)
            if each_block:
                # Form a dict for keyargs
                block_args_info = {}
                block_args_info['ha'] = each_block['ha']
                block_args_info['auth'] = each_block['auth']
                block_args_info['prealloc'] = each_block['prealloc']
                block_args_info['storage'] = each_block['storage']
                block_args_info['ring-buffer'] = each_block['ring-buffer']

                _rc = setup_block(
                    mnode=cls.mnode,
                    volname=each_block['volname'],
                    blockname=each_block['blockname'],
                    servers=each_block['servers'],
                    size=each_block['size'],
                    **block_args_info)
                if not _rc:
                    g.log.error("Failed to create block on volume "
                                "%s: \n%s", cls.volname, each_block)
                    return False
                g.log.info("Successfully created block on volume "
                           "%s: \n%s", cls.volname, each_block)
            else:
                g.log.error("Unable to get args info for block %s on "
                            "volume %s", blockname, cls.volname)
                return False

        # Check if all the blocks are listed in block list command
        for blockname in blocknames:
            each_block = cls.gluster_block_args_info.get(blockname)
            _rc = if_block_exists(cls.mnode, each_block['volname'], blockname)
            if not _rc:
                return False

        # Update the block info dict
        cls.update_block_info_dict()
        # Create client-block map
        cls.create_client_block_map(cls.blocknames)
        return True

    @classmethod
    def update_block_info_dict(cls):
        """Updates the class's block_info_dict variable
        Calls the gluster-block info command and updates the block info.
        """
        # Get Block dict
        cls.blocknames = get_block_list(cls.mnode, cls.volname)

        if cls.blocknames:
            for blockname in cls.blocknames:
                cls.block_info_dict[blockname] = (get_block_info(cls.mnode,
                                                                 cls.volname,
                                                                 blockname))
                if cls.block_info_dict[blockname] is None:
                    g.log.error("Could not get block info")
                    return False
        # Update total_number_of_blocks
        cls.total_num_of_blocks = len(cls.blocknames)

        # Log the block_info_dict
        g.log.info("Logging Block Info:")
        for key, value in cls.block_info_dict.iteritems():
            g.log.info("Glusto block info: %s\n %s" % (key, value))

        return True

    @classmethod
    def discover_blocks_on_clients(cls, blocknames):
        """Discover blocks on all the clients
        """
        # List all the block devices on clients (Logging)

        if not isinstance(blocknames, list):
            blocknames = [blocknames]

        # results = g.run_parallel(cls.clients, "lsblk -S")
        server_list = []
        for blockname in blocknames:
            block_info = get_block_info(cls.mnode, cls.volname, blockname)
            if block_info:
                servers_to_add = block_info.get("EXPORTED ON")
                for server_ip in servers_to_add:
                    if server_ip not in server_list:
                        server_list.append(server_ip)
            else:
                g.log.error("Failed to get block info for block %s"
                            " on volume %s", blockname, cls.volname)
                return False

        g.log.info("Server list %s", server_list)
        # Discover the block devices from clients
        for client in cls.clients:
            for server in server_list:
                cmd = ("iscsiadm -m discovery -t st -p %s" %
                       server)
                ret, out, err = g.run(client, cmd)
                if ret != 0:
                    g.log.error("Failed to discover blocks on "
                                "client %s: %s", client, err)
                    return False
                g.log.info("Discovered blocks on client %s: %s",
                           client, out)
        return True

    @classmethod
    def get_iqn_of_blocks_on_clients(cls, blocknames):
        """Get iqn number of each block on it's respective client.

        Args:
            blocknames: list
        Returns:
            bool: True if iqn of all blocks is obtained. False otherwise
        """
        if not isinstance(blocknames, list):
            blocknames = [blocknames]
        for blockname in blocknames:

            try:
                block_gbid = cls.block_info_dict[blockname]['GBID']
            except KeyError:
                g.log.error("Failed to get GBID of block %s on volume %s",
                            blockname, cls.volname)
                return False

            try:
                block_mapped_client = (
                    cls.clients_blocks_map[blockname]['client'])
            except KeyError:
                g.log.error("Failed to get the client which mounts the block "
                            "%s on the volume %s", blockname, cls.volname)
                return False

            # Get the servers where the blocks are exported
            server_ip = cls.block_info_dict[blockname]['EXPORTED ON'][0]

            # Get iqn from gbid
            cmd = ("iscsiadm -m discovery -t st -p %s | grep -F %s | "
                   "tail -1 | cut -d ' ' -f2" %
                   (server_ip, block_gbid))

            # Not using async here as if two processes execute the above
            # command at the same time in background, it will cause:
            # 'iscsiadm: Connection to Discovery Address' error
            ret, out, err = g.run(block_mapped_client, cmd)
            if ret != 0:
                g.log.error("Failed to get iqn of block %s on client %s: %s",
                            block_gbid, block_mapped_client, err)
                return False
            g.log.info("Iqn for gbid '%s' on client %s : '%s'",
                       block_gbid, block_mapped_client, out)
            block_iqn = out.strip()
            cls.clients_blocks_map[blockname]['iqn'] = block_iqn

        return True

    @classmethod
    def login_to_iqn_on_clients(cls, blocknames):
        """Login the blocks on their clients/initiator.

        Return:
            Either bool or Execution error.
        """
        if not isinstance(blocknames, list):
            blocknames = [blocknames]

        ret = cls.update_block_info_dict()
        if not ret:
            return False

        result = cls.get_iqn_of_blocks_on_clients(blocknames)
        if not result:
            return False

        # ret_value = True
        # Login to the block from the client
        for blockname in blocknames:
            block_gbid = cls.block_info_dict[blockname]['GBID']
            block_mapped_client = (
                cls.clients_blocks_map[blockname]['client'])

            if not cls.clients_blocks_map[blockname].get('iqn'):
                g.log.error("Iqn info for block %s not there. So can't login",
                            blockname)
                return False

            block_iqn = cls.clients_blocks_map[blockname]['iqn']
            cls.clients_blocks_map[blockname]['logged_in'] = False

            if cls.block_info_dict[blockname]['PASSWORD']:
                block_password = cls.block_info_dict[blockname]['PASSWORD']
                cmd = ("iscsiadm -m node -T %s -o update -n "
                       "node.session.auth.authmethod -v CHAP -n "
                       "node.session.auth.username -v %s -n "
                       "node.session.auth.password -v %s " %
                       (block_iqn, block_gbid, block_password))
                ret, out, err = g.run(block_mapped_client, cmd)
                if ret != 0:
                    g.log.error("Unable to update login credentials for "
                                "iqn %s on %s: %s",
                                block_iqn, block_mapped_client, err)
                    return False
                g.log.info("Credentials for iqn %s updated successfully "
                           "on %s",
                           block_iqn, block_mapped_client)

            # Login to iqn
            if not cls.clients_blocks_map[blockname].get('logged_in'):
                cmd = "iscsiadm -m node -T %s -l" % block_iqn
                ret, out, err = g.run(block_mapped_client, cmd)
                if ret != 0:
                    raise ExecutionError("Failed to login to iqn %s on "
                                         "%s: %s Command o/p: %s ",
                                         block_iqn, block_mapped_client,
                                         err, out)

                g.log.info("Successfully logged in to iqn %s on %s: %s",
                           block_iqn, block_mapped_client, out)
                cls.clients_blocks_map[blockname]['logged_in'] = True

        return True

    @classmethod
    def logout_iqn_on_clients(cls, blocknames):
        """Logout each block from the initiator
        """
        # Convert string or unicode type to list
        if not isinstance(blocknames, list):
            blocknames = [blocknames]

        for blockname in blocknames:
            block_mapped_client = (
                cls.clients_blocks_map[blockname]['client'])
            block_iqn = cls.clients_blocks_map[blockname]['iqn']
            cmd = "iscsiadm -m node -T %s -u" % block_iqn
            ret, out, err = g.run(block_mapped_client, cmd)
            if ret != 0:
                g.log.error("Failed to logout of iqn %s on %s: %s"
                            " Command o/p: %s",
                            block_iqn, block_mapped_client, err, out)
                return False
            g.log.info("Successfully logged out of iqn %s on %s: %s",
                       block_iqn, block_mapped_client, out)

        return True

    @classmethod
    def get_mpath_of_iqn_on_clients(cls, blocknames):
        """Get mpath of the logged in blocks

        Return:
            True if successful and execution error if getting mpath fails.
        """
        # Get the mpath for iqn
        # Donot forget to install 'sg3_utils'
        # Convert string or unicode type to list
        if not isinstance(blocknames, list):
            blocknames = [blocknames]

        for blockname in blocknames:
            block_gbid = cls.block_info_dict[blockname]['GBID']
            block_mapped_client = cls.clients_blocks_map[blockname]['client']
            block_iqn = cls.clients_blocks_map[blockname]['iqn']
            if not cls.clients_blocks_map[blockname].get('mpath'):
                cmd = ("for i in `/dev/mapper/mpath*` ; do "
                       "sg_inq -i $i | grep %s > /dev/null ; "
                       "if [[ $? -eq 0 ]] ; then  echo $i ; fi ; done" %
                       (block_gbid))
                ret, out, err = g.run(block_mapped_client, cmd)
                if ret != 0:
                    raise ExecutionError("Failed to get mpath for iqn %s on "
                                         "client %s: %s", block_iqn,
                                         block_mapped_client, err)
                block_mpath = out.strip()
                g.log.info("Successfully got mpath '%s' for iqn '%s' on "
                           "client %s", block_mpath, block_iqn,
                           block_mapped_client)
                cls.clients_blocks_map[blockname]['mpath'] = block_mpath
                time.sleep(1)

        return True

    @classmethod
    def create_client_block_map(cls, blocknames):
        """
        Mapping a single block to a client.
        Select a client randomly from the list
        """
        if not isinstance(blocknames, list):
            blocknames = [blocknames]

        tmp_client_list = cls.clients[:]
        for blockname in blocknames:
            if blockname not in cls.clients_blocks_map:
                if len(tmp_client_list) == 0:
                    tmp_client_list = cls.clients[:]
                client_to_map = random.choice(tmp_client_list)
                tmp_client_list.remove(client_to_map)
                cls.clients_blocks_map[blockname] = {
                    'client': client_to_map,
                    'iqn': '',
                    'logged_in': False,
                    'mpath': '',
                    'is_formatted': False,
                    'is_mounted': False,
                    }
        g.log.info("Blocks mapped to clients. Each block is mapped to a  "
                   "randomly selected client")
        for blockname in blocknames:
            g.log.info("Block %s mapped to %s", blockname,
                       cls.clients_blocks_map[blockname]['client'])

    @classmethod
    def mount_blocks(cls, blocknames, filesystem='xfs'):
        """Mount the blocks on their clients
        """
        if not isinstance(blocknames, list):
            blocknames = [blocknames]
        # Discover the block on client
        ret = cls.discover_blocks_on_clients(blocknames)
        if not ret:
            return False

        for blockname in blocknames:
            if not cls.clients_blocks_map[blockname]['logged_in']:

                # Login inside the block on client
                ret = cls.login_to_iqn_on_clients(blockname)
                if not ret:
                    return False

                # time.sleep added because the path /dev/mapper/mapth*
                # is getting read even before the logging is completed.
                time.sleep(2)
                # Get mpath of block on it's client
                ret = cls.get_mpath_of_iqn_on_clients(blockname)
                if not ret:
                    return False

            # make fs
            block_mpath = cls.clients_blocks_map[blockname]['mpath']
            block_mapped_client = cls.clients_blocks_map[blockname]['client']
            if not cls.clients_blocks_map[blockname].get('is_formatted'):
                cmd = "mkfs.%s -f %s" % (filesystem, block_mpath)
                ret, out, err = g.run(block_mapped_client, cmd)
                if ret != 0:
                    raise ExecutionError("Failed to make fs on %s on client "
                                         "%s: %s", block_mpath,
                                         block_mapped_client, err)
                g.log.info("Successfully created fs on %s on client %s: %s",
                           block_mpath, block_mapped_client, out)
                cls.clients_blocks_map[blockname]['is_formatted'] = True

            # mount the block
            if not cls.clients_blocks_map[blockname].get('is_mounted'):
                temp_mount = {
                    'protocol': 'xfs',
                    'client': {
                        'host': cls.clients_blocks_map[blockname]['client'],
                            },
                    'volname': cls.clients_blocks_map[blockname]['mpath'],
                    'mountpoint': "/mnt/%s" % blockname
                    }
                mount_obj = create_mount_objs([temp_mount]).pop()

                g.log.info("Mount Obj %s", mount_obj)
                g.log.info("Mounting the device %s on %s:%s" %
                           (mount_obj.volname, mount_obj.client_system,
                            mount_obj.mountpoint))

                # The function is_mounted will give an error in log file:
                # "Missing arguments for mount"
                # Because this is also used for mounting glusterfs volumes and
                # a server name is needed But here mounting does not
                # require a server name and therefore the argument check
                # for server fails and an error is reported in the log file.
                # But that will not affect the block mounting.
                # So, we can live with it for now.
                ret = mount_obj.mount()
                if not ret:
                    raise ExecutionError("Unable to mount the "
                                         "device %s on %s:%s" %
                                         (mount_obj.volname,
                                          mount_obj.client_system,
                                          mount_obj.mountpoint))
                g.log.info("Successfully mounted the device %s on %s:%s" %
                           (mount_obj.volname, mount_obj.client_system,
                            mount_obj.mountpoint))
                cls.mount_blocks_list.append(mount_obj)
                cls.clients_blocks_map[blockname]['is_mounted'] = True

        return True

    @classmethod
    def setup_block_mount_block(cls, blocknames):
        """Create and mount the blocks
        """
        # Setup block
        g.log.info("Setting up blocks")
        ret = cls.setup_blocks(blocknames)
        if not ret:
            raise ExecutionError("Failed to setup blocks")
        g.log.info("Successful in setting up blocks")

        # Mount Blocks
        g.log.info("Mounting the blocks on initiator nodes")
        ret = cls.mount_blocks(blocknames)
        if not ret:
            raise ExecutionError("Failed to mount the blocks of volume %s",
                                 cls.volname)
        g.log.info("Successful in mounting the blocks of the volume %s",
                   cls.volname)

        return True

    @classmethod
    def get_block_args_info_from_config(cls):
        """Created the dict gluster_block_args_info which helps in
        providing block information during block creation
        """
        # Get gluster block info from config file
        if g.config.get('gluster_block_args_info'):
            cls.gluster_block_args_info = {}
            blocks_count = 0
            each_block_info = g.config['gluster_block_args_info']
            # for i, each_block_info in enumerate(
            # g.config['gluster_block_args_info']):
            # volname
            block_on_volume = cls.volname
            if each_block_info.get('volname'):
                block_on_volume = each_block_info['volname']

            # Block name
            block_base_name = "gluster_block"
            if each_block_info.get('blockname'):
                block_base_name = each_block_info['blockname']

            # servers
            block_servers = cls.servers
            if each_block_info.get('servers'):
                block_servers = each_block_info['servers']
                if not filter(None, block_servers):
                    block_servers = cls.servers

            # Block size
            block_size = "1GiB"
            if each_block_info.get('size'):
                block_size = each_block_info['size']

            # HA
            block_ha = 3
            if each_block_info.get('ha'):
                block_ha = each_block_info['ha']

            # auth
            block_auth = None
            if each_block_info.get('auth'):
                block_auth = each_block_info['auth']

            # prealloc
            block_prealloc = None
            if each_block_info.get('prealloc'):
                block_prealloc = each_block_info['prealloc']

            # ring-buffer
            block_ring_buffer = None
            if each_block_info.get('ring-buffer'):
                block_ring_buffer = each_block_info['ring-buffer']

            # Number of blocks
            num_of_blocks = 1
            if each_block_info.get('num_of_blocks'):
                num_of_blocks = int(each_block_info['num_of_blocks'])

            # for count in range(blocks_count,num_of_blocks +blocks_count):
            for count in range(blocks_count, num_of_blocks):
                # blocks_count = int(count) + i

                if block_ha:
                    selected_block_servers = random.sample(block_servers,
                                                           block_ha)
                else:
                    selected_block_servers = random.choice(block_servers)

                block_name = "_".join([block_base_name,
                                       str(count + 1)])

                cls.gluster_block_args_info[block_name] = (
                    {'volname': block_on_volume,
                     'blockname': block_name,
                     'servers': cls.get_ip_from_hostname(
                         selected_block_servers),
                     'size': block_size,
                     'ha': block_ha,
                     'auth': block_auth,
                     'prealloc': block_prealloc,
                     'storage': None,
                     'ring-buffer': block_ring_buffer}
                    )

        for key in cls.gluster_block_args_info.keys():
            value = cls.gluster_block_args_info[key]
            g.log.info("Gluster-Block args info: %s\n %s" % (key, value))

    @classmethod
    def setUpClass(cls, setup_vol=True, setup_blk=True, mount_blk=True):
        """Setup volume, create blocks, mount the blocks if specified.
        """
        GlusterBaseClass.setUpClass.im_func(cls)

        cls.mount_blocks_list = []
        cls.total_num_of_blocks = 0
        cls.block_info_dict = {}
        cls.clients_blocks_map = {}
        cls.blocknames = []

        # Default gluster block info
        cls.gluster_block_args_info = {
            'gluster_block_%d' % (cls.total_num_of_blocks + 1): {
                'volname': cls.volname,
                'blockname': 'gluster_block_%d'
                             % (cls.total_num_of_blocks + 1),
                'servers': random.sample(cls.servers_ips, 2),
                'size': '1GiB',
                'ha': 2,
                'auth': None,
                'prealloc': None,
                'storage': None,
                'ring-buffer': None
                }
            }

        if g.config.get('gluster_block_args_info'):
            cls.get_block_args_info_from_config()

    @classmethod
    def tearDownClass(cls, umount_blocks=True, cleanup_blocks=True,
                      cleanup_vol=True, unlink_storage="yes"):
        """Teardown the mounts, deletes blocks, gluster volume.
        """
        # Unmount volume
        if umount_blocks:
            _rc = True
            g.log.info("Starting to UnMount Blocks")
            for mount_obj in cls.mount_blocks_list:
                ret = mount_obj.unmount()
                if not ret:
                    g.log.error("Unable to unmount block '%s on cleint %s "
                                "at %s'",
                                mount_obj.volname, mount_obj.client_system,
                                mount_obj.mountpoint)
                    _rc = False
            if not _rc:
                raise ExecutionError("Unmount of all mounts are not "
                                     "successful")
            else:
                g.log.info("Successful in unmounting volume on all clients")
        else:
            g.log.info("Not Unmounting the Volume as 'umount_vol' is set "
                       "to %s", umount_blocks)

        # Logout the blocks
        for blockname in cls.clients_blocks_map:
            block_iqn = cls.clients_blocks_map[blockname]['iqn']
            block_mapped_client = (
                cls.clients_blocks_map[blockname]['client'])
            g.log.info("Logging out iqn %s on client %s", block_iqn,
                       block_mapped_client)
            cmd = "iscsiadm -m node -T %s -u" % block_iqn
            ret, out, err = g.run(block_mapped_client, cmd)
            if ret != 0:
                raise ExecutionError("Failed to logout iqn %s on client %s "
                                     ":%s", block_iqn, block_mapped_client,
                                     err)
            g.log.info("Successfully logged out iqn %s on client %s: %s",
                       block_iqn, block_mapped_client, out)

        # Restarting multipathd on all clients
        g.log.info("Restarting multipathd on all clients")
        cmd = "service multipathd restart && service multipathd status"
        results = g.run_parallel(cls.clients, cmd)
        for client in results:
            ret, out, err = results[client]
            if ret != 0:
                raise ExecutionError("Failed to restart multipathd on "
                                     "client %s: %s", client, err)
            g.log.info("Successfully restarted multipathd on client %s: %s",
                       client, out)

        # Cleanup blocks
        if cleanup_blocks:
            blocknames = get_block_list(cls.mnode, cls.volname)
            if blocknames:
                g.log.info("Listing blocks before deleting:\n%s",
                           '\n'.join(blocknames))
                for blockname in blocknames:
                    ret, out, err = block_delete(cls.mnode, cls.volname,
                                                 blockname, unlink_storage)
                    if ret != 0:
                        raise ExecutionError("Failed to delete the block "
                                             "%s on volume %s", blockname,
                                             cls.volname)
                    g.log.info("Successfully deleted the block %s on "
                               "volume %s", blockname, cls.volname)

        # Cleanup volume
        if cleanup_vol:
            g.log.info("Cleanup Volume %s", cls.volname)
            ret = cleanup_volume(mnode=cls.mnode, volname=cls.volname)
            if not ret:
                raise ExecutionError("cleanup volume %s failed", cls.volname)
            else:
                g.log.info("Successfully cleaned-up volume")
        else:
            g.log.info("Not Cleaning-Up volume as 'cleanup_vol' is %s",
                       cleanup_vol)

        GlusterBaseClass.tearDownClass.im_func(cls)