summaryrefslogtreecommitdiff
path: root/scripts/wsrep_sst_mariabackup.sh
blob: a3fc4b78718b6d8def474c12d35cd29d20b0241e (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
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
#!/usr/bin/env bash

set -ue

# Copyright (C) 2017-2022 MariaDB
# Copyright (C) 2013 Percona 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; version 2 of the License.
#
# 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; see the file COPYING. If not, write to the
# Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston
# MA  02110-1335  USA.

# Documentation:
# https://mariadb.com/kb/en/mariabackup-overview/
# Make sure to read that before proceeding!

OS="$(uname)"

. $(dirname "$0")/wsrep_sst_common
wsrep_check_datadir

ealgo=""
eformat=""
ekey=""
ekeyfile=""
encrypt=0
ssyslog=""
ssystag=""
BACKUP_PID=""
tcert=""
tcap=""
tpem=""
tkey=""
tmode=""
sockopt=""
progress=""
ttime=0
totime=0
lsn=""
ecmd=""
rlimit=""
# Initially
stagemsg="$WSREP_SST_OPT_ROLE"
cpat=""
speciald=1
ib_home_dir=""
ib_log_dir=""
ib_undo_dir=""

sfmt=""
strmcmd=""
tfmt=""
tcmd=""
payload=0
pvformat="-F '%N => Rate:%r Avg:%a Elapsed:%t %e Bytes: %b %p'"
pvopts="-f -i 10 -N $WSREP_SST_OPT_ROLE"
STATDIR=""
uextra=0
disver=""

tmpopts=""
itmpdir=""
xtmpdir=""

scomp=""
sdecomp=""

ssl_dhparams=""

compress='none'
compress_chunk=""
compress_threads=""

backup_threads=""

encrypt_threads=""
encrypt_chunk=""

readonly SECRET_TAG='secret'
readonly TOTAL_TAG='secret /total'

# Required for backup locks
# For backup locks it is 1 sent by joiner
sst_ver=1

if [ -n "$(commandex pv)" ] && pv --help | grep -qw -F -- '-F'; then
    pvopts="$pvopts $pvformat"
fi
pcmd="pv $pvopts"
declare -a RC

BACKUP_BIN=$(commandex 'mariabackup')
if [ -z "$BACKUP_BIN" ]; then
    wsrep_log_error 'mariabackup binary not found in path'
    exit 42
fi

DATA="$WSREP_SST_OPT_DATA"
INFO_FILE='xtrabackup_galera_info'
IST_FILE='xtrabackup_ist'
MAGIC_FILE="$DATA/$INFO_FILE"

INNOAPPLYLOG="$DATA/mariabackup.prepare.log"
INNOMOVELOG="$DATA/mariabackup.move.log"
INNOBACKUPLOG="$DATA/mariabackup.backup.log"

timeit()
{
    local stage="$1"
    shift
    local cmd="$@"
    local x1 x2 took extcode

    if [ $ttime -eq 1 ]; then
        x1=$(date +%s)
        wsrep_log_info "Evaluating $cmd"
        eval "$cmd"
        extcode=$?
        x2=$(date +%s)
        took=$(( x2-x1 ))
        wsrep_log_info "NOTE: $stage took $took seconds"
        totime=$(( totime+took ))
    else
        wsrep_log_info "Evaluating $cmd"
        eval "$cmd"
        extcode=$?
    fi
    return $extcode
}

get_keys()
{
    # $encrypt -eq 1 is for internal purposes only
    if [ $encrypt -ge 2 -o $encrypt -eq -1 ]; then
        return
    fi

    if [ $encrypt -eq 0 ]; then
        if [ -n "$ealgo" -o -n "$ekey" -o -n "$ekeyfile" ]; then
            wsrep_log_error "Options for encryption are specified," \
                            "but encryption itself is disabled. SST may fail."
        fi
        return
    fi

    if [ "$sfmt" = 'tar' ]; then
        wsrep_log_info "NOTE: key-based encryption (encrypt=1)" \
                       "cannot be enabled with tar format"
        encrypt=-1
        return
    fi

    wsrep_log_info "Key based encryption enabled in my.cnf"

    if [ -z "$ealgo" ]; then
        wsrep_log_error "FATAL: Encryption algorithm empty from my.cnf, bailing out"
        exit 3
    fi

    if [ -z "$ekey" -a ! -r "$ekeyfile" ]; then
        wsrep_log_error "FATAL: Either key must be specified" \
                        "or keyfile must be readable"
        exit 3
    fi

    if [ "$eformat" = 'openssl' ]; then
        get_openssl
        if [ -z "$OPENSSL_BINARY" ]; then
            wsrep_log_error "If encryption using the openssl is enabled," \
                            "then you need to install openssl"
            exit 2
        fi
        ecmd="'$OPENSSL_BINARY' enc -$ealgo"
        if "$OPENSSL_BINARY" enc -help 2>&1 | grep -qw -F -- '-pbkdf2'; then
            ecmd="$ecmd -pbkdf2"
        elif "$OPENSSL_BINARY" enc -help 2>&1 | grep -qw -F -- '-iter'; then
            ecmd="$ecmd -iter 1"
        elif "$OPENSSL_BINARY" enc -help 2>&1 | grep -qw -F -- '-md'; then
            ecmd="$ecmd -md sha256"
        fi
        if [ -z "$ekey" ]; then
            ecmd="$ecmd -kfile '$ekeyfile'"
        else
            ecmd="$ecmd -k '$ekey'"
        fi
    elif [ "$eformat" = 'xbcrypt' ]; then
        if [ -z "$(commandex xbcrypt)" ]; then
            wsrep_log_error "If encryption using the xbcrypt is enabled," \
                            "then you need to install xbcrypt"
            exit 2
        fi
        wsrep_log_info "NOTE: xbcrypt-based encryption," \
                       "supported only from Xtrabackup 2.1.4"
        if [ -z "$ekey" ]; then
            ecmd="xbcrypt --encrypt-algo='$ealgo' --encrypt-key-file='$ekeyfile'"
        else
            ecmd="xbcrypt --encrypt-algo='$ealgo' --encrypt-key='$ekey'"
        fi
        if [ -n "$encrypt_threads" ]; then
            ecmd="$ecmd --encrypt-threads=$encrypt_threads"
        fi
        if [ -n "$encrypt_chunk" ]; then
            ecmd="$ecmd --encrypt-chunk-size=$encrypt_chunk"
        fi
    else
        wsrep_log_error "Unknown encryption format='$eformat'"
        exit 2
    fi

    [ "$WSREP_SST_OPT_ROLE" = 'joiner' ] && ecmd="$ecmd -d"

    stagemsg="$stagemsg-XB-Encrypted"
}

get_transfer()
{
    if [ "$tfmt" = 'nc' ]; then
        wsrep_log_info "Using netcat as streamer"
        wsrep_check_programs nc
        tcmd='nc'
        if [ "$WSREP_SST_OPT_ROLE" = 'joiner' ]; then
            if nc -h 2>&1 | grep -q -F 'ncat'; then
                wsrep_log_info "Using Ncat as streamer"
                tcmd="$tcmd -l"
            elif nc -h 2>&1 | grep -qw -F -- '-d'; then
                wsrep_log_info "Using Debian netcat as streamer"
                tcmd="$tcmd -dl"
                if [ $WSREP_SST_OPT_HOST_IPv6 -eq 1 ]; then
                    # When host is not explicitly specified (when only the port
                    # is specified) netcat can only bind to an IPv4 address if
                    # the "-6" option is not explicitly specified:
                    tcmd="$tcmd -6"
                fi
            else
                wsrep_log_info "Using traditional netcat as streamer"
                tcmd="$tcmd -l -p"
            fi
            tcmd="$tcmd $SST_PORT"
        else
            # Check to see if netcat supports the '-N' flag.
            # -N Shutdown the network socket after EOF on stdin
            # If it supports the '-N' flag, then we need to use the '-N'
            # flag, otherwise the transfer will stay open after the file
            # transfer and cause the command to timeout.
            # Older versions of netcat did not need this flag and will
            # return an error if the flag is used.
            if nc -h 2>&1 | grep -qw -F -- '-N'; then
                tcmd="$tcmd -N"
                wsrep_log_info "Using nc -N"
            fi
            # netcat doesn't understand [] around IPv6 address
            if nc -h 2>&1 | grep -q -F 'ncat'; then
                wsrep_log_info "Using Ncat as streamer"
            elif nc -h 2>&1 | grep -qw -F -- '-d'; then
                wsrep_log_info "Using Debian netcat as streamer"
            else
                wsrep_log_info "Using traditional netcat as streamer"
                tcmd="$tcmd -q0"
            fi
            tcmd="$tcmd $WSREP_SST_OPT_HOST_UNESCAPED $SST_PORT"
        fi
    else
        tfmt='socat'

        wsrep_log_info "Using socat as streamer"
        wsrep_check_programs socat

        if [ -n "$sockopt" ]; then
            sockopt=$(trim_string "$sockopt" ',')
            if [ -n "$sockopt" ]; then
                sockopt=",$sockopt"
            fi
        fi

        # Add an option for ipv6 if needed:
        if [ $WSREP_SST_OPT_HOST_IPv6 -eq 1 ]; then
            # If sockopt contains 'pf=ip6' somewhere in the middle,
            # this will not interfere with socat, but exclude the trivial
            # cases when sockopt contains 'pf=ip6' as prefix or suffix:
            if [ "$sockopt" = "${sockopt#,pf=ip6}" -a \
                 "$sockopt" = "${sockopt%,pf=ip6}" ]
            then
                sockopt=",pf=ip6$sockopt"
            fi
        fi

        if [ $encrypt -lt 2 ]; then
            if [ "$WSREP_SST_OPT_ROLE" = 'joiner' ]; then
                tcmd="socat -u TCP-LISTEN:$SST_PORT,reuseaddr$sockopt stdio"
            else
                tcmd="socat -u stdio TCP:$REMOTEIP:$SST_PORT$sockopt"
            fi
            return
        fi

        if ! socat -V | grep -q -F 'WITH_OPENSSL 1'; then
            wsrep_log_error "******** FATAL ERROR ************************************************ "
            wsrep_log_error "* Encryption requested, but socat is not OpenSSL enabled (encrypt=$encrypt) *"
            wsrep_log_error "********************************************************************* "
            exit 2
        fi

        local action='Decrypting'
        if [ "$WSREP_SST_OPT_ROLE" = 'joiner' ]; then
            tcmd="socat -u openssl-listen:$SST_PORT,reuseaddr"
        else
            tcmd="socat -u stdio openssl-connect:$REMOTEIP:$SST_PORT"
            action='Encrypting'
        fi

        if [ "${sockopt#*,dhparam=}" != "$sockopt" ]; then
            if [ -z "$ssl_dhparams" ]; then
                # Determine the socat version
                SOCAT_VERSION=$(socat -V 2>&1 | \
                                grep -m1 -owE '[0-9]+(\.[0-9]+)+' | \
                                head -n1 || :)
                if [ -z "$SOCAT_VERSION" ]; then
                    wsrep_log_error "******** FATAL ERROR ******************"
                    wsrep_log_error "* Cannot determine the socat version. *"
                    wsrep_log_error "***************************************"
                    exit 2
                fi
                if ! check_for_version "$SOCAT_VERSION" '1.7.3'; then
                    # socat versions < 1.7.3 will have 512-bit dhparams (too small)
                    # so create 2048-bit dhparams and send that as a parameter:
                    check_for_dhparams
                fi
            fi
            if [ -n "$ssl_dhparams" ]; then
                tcmd="$tcmd,dhparam='$ssl_dhparams'"
            fi
        fi

        CN_option=",commonname=''"

        if [ $encrypt -eq 2 ]; then
            wsrep_log_info \
                "Using openssl based encryption with socat: with crt and pem"
            if [ -z "$tpem" -o -z "$tcert$tcap" ]; then
                wsrep_log_error \
                    "Both PEM file and CRT file (or path) are required"
                exit 22
            fi
            verify_ca_matches_cert "$tpem" "$tcert" "$tcap"
            tcmd="$tcmd,cert='$tpem'"
            if [ -n "$tcert" ]; then
                tcmd="$tcmd,cafile='$tcert'"
            fi
            if [ -n "$tcap" ]; then
                tcmd="$tcmd,capath='$tcap'"
            fi
            stagemsg="$stagemsg-OpenSSL-Encrypted-2"
            wsrep_log_info "$action with cert='$tpem', ca='$tcert', capath='$tcap'"
        elif [ $encrypt -eq 3 -o $encrypt -eq 4 ]; then
            wsrep_log_info \
                "Using openssl based encryption with socat: with key and crt"
            if [ -z "$tpem" -o -z "$tkey" ]; then
                wsrep_log_error "Both the certificate file (or path) and" \
                                "the key file are required"
                exit 22
            fi
            verify_cert_matches_key "$tpem" "$tkey"
            stagemsg="$stagemsg-OpenSSL-Encrypted-3"
            if [ -z "$tcert$tcap" ]; then
                if [ $encrypt -eq 4 ]; then
                    wsrep_log_error \
                        "Peer certificate file (or path) required if encrypt=4"
                    exit 22
                fi
                # no verification
                CN_option=""
                tcmd="$tcmd,cert='$tpem',key='$tkey',verify=0"
                wsrep_log_info \
                    "$action with cert='$tpem', key='$tkey', verify=0"
            else
                # CA verification
                verify_ca_matches_cert "$tpem" "$tcert" "$tcap"
                if [ -n "$WSREP_SST_OPT_REMOTE_USER" ]; then
                    CN_option=",commonname='$WSREP_SST_OPT_REMOTE_USER'"
                elif [ "$WSREP_SST_OPT_ROLE" = 'joiner' -o $encrypt -eq 4 ]
                then
                    CN_option=",commonname=''"
                elif is_local_ip "$WSREP_SST_OPT_HOST_UNESCAPED"; then
                    CN_option=',commonname=localhost'
                else
                    CN_option=",commonname='$WSREP_SST_OPT_HOST_UNESCAPED'"
                fi
                tcmd="$tcmd,cert='$tpem',key='$tkey'"
                if [ -n "$tcert" ]; then
                    tcmd="$tcmd,cafile='$tcert'"
                fi
                if [ -n "$tcap" ]; then
                    tcmd="$tcmd,capath='$tcap'"
                fi
                wsrep_log_info "$action with cert='$tpem', key='$tkey'," \
                               "ca='$tcert', capath='$tcap'"
            fi
        else
            wsrep_log_info "Unknown encryption mode: encrypt=$encrypt"
            exit 22
        fi

        tcmd="$tcmd$CN_option$sockopt"

        if [ "$WSREP_SST_OPT_ROLE" = 'joiner' ]; then
            tcmd="$tcmd stdio"
        fi
    fi
}

get_footprint()
{
    pushd "$WSREP_SST_OPT_DATA" 1>/dev/null
    payload=$(find . -regex '.*\.ibd$\|.*\.MYI$\|.*\.MYD$\|.*ibdata1$' \
              -type f -print0 | du --files0-from=- --block-size=1 -c -s | \
              awk 'END { print $1 }')
    if [ "$compress" != 'none' ]; then
        # QuickLZ has around 50% compression ratio
        # When compression/compaction used, the progress is only an approximate.
        payload=$(( payload*1/2 ))
    fi
    popd 1>/dev/null
    pcmd="$pcmd -s $payload"
    adjust_progress
}

adjust_progress()
{
    if [ -z "$(commandex pv)" ]; then
        wsrep_log_error "pv not found in path: $PATH"
        wsrep_log_error "Disabling all progress/rate-limiting"
        pcmd=""
        rlimit=""
        progress=""
        return
    fi

    if [ -n "$progress" -a "$progress" != '1' ]; then
        if [ -e "$progress" ]; then
            pcmd="$pcmd 2>>'$progress'"
        else
            pcmd="$pcmd 2>'$progress'"
        fi
    elif [ -z "$progress" -a -n "$rlimit" ]; then
            # When rlimit is non-zero
            pcmd='pv -q'
    fi

    if [ -n "$rlimit" -a "$WSREP_SST_OPT_ROLE" = 'donor' ]; then
        wsrep_log_info "Rate-limiting SST to $rlimit"
        pcmd="$pcmd -L \$rlimit"
    fi
}

encgroups='--mysqld|sst|xtrabackup'

read_cnf()
{
    sfmt=$(parse_cnf sst streamfmt 'mbstream')
    tfmt=$(parse_cnf sst transferfmt 'socat')

    encrypt=$(parse_cnf "$encgroups" 'encrypt' 0)
    tmode=$(parse_cnf "$encgroups" 'ssl-mode' 'DISABLED' | \
            tr '[[:lower:]]' '[[:upper:]]')

    case "$tmode" in
    'VERIFY_IDENTITY'|'VERIFY_CA'|'REQUIRED'|'DISABLED')
        ;;
    *)
        wsrep_log_error "Unrecognized ssl-mode option: '$tmode'"
        exit 22 # EINVAL
        ;;
    esac

    if [ $encrypt -eq 0 -o $encrypt -ge 2 ]; then
        if [ "$tmode" != 'DISABLED' -o $encrypt -ge 2 ]; then
            check_server_ssl_config
        fi
        if [ "$tmode" != 'DISABLED' ]; then
            if [ 0 -eq $encrypt -a -n "$tpem" -a -n "$tkey" ]
            then
                encrypt=3 # enable cert/key SSL encyption
                # avoid CA verification if not set explicitly:
                # nodes may happen to have different CA if self-generated,
                # zeroing up tcert and tcap does the trick:
                if [ "${tmode#VERIFY}" = "$tmode" ]; then
                    tcert=""
                    tcap=""
                fi
            fi
        fi
    elif [ $encrypt -eq 1 ]; then
        ealgo=$(parse_cnf "$encgroups" 'encrypt-algo')
        eformat=$(parse_cnf "$encgroups" 'encrypt-format' 'openssl')
        ekey=$(parse_cnf "$encgroups" 'encrypt-key')
        # The keyfile should be read only when the key
        # is not specified or empty:
        if [ -z "$ekey" ]; then
            ekeyfile=$(parse_cnf "$encgroups" 'encrypt-key-file')
        fi
    fi

    wsrep_log_info "SSL configuration: CA='$tcert', CAPATH='$tcap'," \
                   "CERT='$tpem', KEY='$tkey', MODE='$tmode'," \
                   "encrypt='$encrypt'"

    sockopt=$(parse_cnf sst sockopt "")
    progress=$(parse_cnf sst progress "")
    ttime=$(parse_cnf sst time 0)
    cpat='.*\.pem$\|.*galera\.cache$\|.*sst_in_progress$\|.*\.sst$\|.*gvwstate\.dat$\|.*grastate\.dat$\|.*\.err$\|.*\.log$\|.*RPM_UPGRADE_MARKER$\|.*RPM_UPGRADE_HISTORY$'
    [ "$OS" = 'FreeBSD' ] && cpat=$(echo "$cpat" | sed 's/\\|/|/g')
    cpat=$(parse_cnf sst cpat "$cpat")
    scomp=$(parse_cnf sst compressor "")
    sdecomp=$(parse_cnf sst decompressor "")

    rlimit=$(parse_cnf sst rlimit "")
    uextra=$(parse_cnf sst use-extra 0)
    speciald=$(parse_cnf sst sst-special-dirs 1)
    iopts=$(parse_cnf sst inno-backup-opts "")
    iapts=$(parse_cnf sst inno-apply-opts "")
    impts=$(parse_cnf sst inno-move-opts "")
    stimeout=$(parse_cnf sst sst-initial-timeout 300)
    ssyslog=$(parse_cnf sst sst-syslog 0)
    ssystag=$(parse_cnf mysqld_safe syslog-tag "${SST_SYSLOG_TAG:-}")
    ssystag="$ssystag-"
    sstlogarchive=$(parse_cnf sst sst-log-archive 1)
    sstlogarchivedir=""
    if [ $sstlogarchive -ne 0 ]; then
        sstlogarchivedir=$(parse_cnf sst sst-log-archive-dir \
                           '/tmp/sst_log_archive')
        if [ -n "$sstlogarchivedir" ]; then
            sstlogarchivedir=$(trim_dir "$sstlogarchivedir")
        fi
    fi

    if [ $speciald -eq 0 ]; then
        wsrep_log_error \
            "sst-special-dirs equal to 0 is not supported, falling back to 1"
        speciald=1
    fi

    if [ $ssyslog -ne -1 ]; then
        ssyslog=$(in_config 'mysqld_safe' 'syslog')
    fi

    if [ "$WSREP_SST_OPT_ROLE" = 'donor' ]; then
        compress=$(parse_cnf "$encgroups" 'compress' 'none')
        if [ "$compress" != 'none' ]; then
            compress_chunk=$(parse_cnf "$encgroups" 'compress-chunk-size')
            compress_threads=$(parse_cnf "$encgroups" 'compress-threads')
        fi
    fi

    backup_threads=$(parse_cnf "$encgroups" 'backup-threads')

    if [ "$eformat" = 'xbcrypt' ]; then
        encrypt_threads=$(parse_cnf "$encgroups" 'encrypt-threads')
        encrypt_chunk=$(parse_cnf "$encgroups" 'encrypt-chunk-size')
    fi
}

get_stream()
{
    if [ "$sfmt" = 'mbstream' -o "$sfmt" = 'xbstream' ]; then
        sfmt='mbstream'
        local STREAM_BIN=$(commandex "$sfmt")
        if [ -z "$STREAM_BIN" ]; then
            wsrep_log_error "Streaming with $sfmt, but $sfmt not found in path"
            exit 42
        fi
        if [ "$WSREP_SST_OPT_ROLE" = 'joiner' ]; then
            strmcmd="'$STREAM_BIN' -x"
        else
            strmcmd="'$STREAM_BIN' -c '$INFO_FILE'"
        fi
    else
        sfmt='tar'
        if [ "$WSREP_SST_OPT_ROLE" = 'joiner' ]; then
            strmcmd='tar xfi -'
        else
            strmcmd="tar cf - '$INFO_FILE'"
        fi
    fi
    wsrep_log_info "Streaming with $sfmt"
}

cleanup_at_exit()
{
    # Since this is invoked just after exit NNN
    local estatus=$?
    if [ $estatus -ne 0 ]; then
        wsrep_log_error "Cleanup after exit with status: $estatus"
    fi

    [ "$(pwd)" != "$OLD_PWD" ] && cd "$OLD_PWD"

    if [ $estatus -ne 0 ]; then
        wsrep_log_error "Removing $MAGIC_FILE file due to signal"
        [ -f "$MAGIC_FILE" ] && rm -f "$MAGIC_FILE" || :
    fi

    if [ "$WSREP_SST_OPT_ROLE" = 'joiner' ]; then
        wsrep_log_info "Removing the sst_in_progress file"
        wsrep_cleanup_progress_file
    else
        if [ -n "$BACKUP_PID" ]; then
            if check_pid "$BACKUP_PID" 1; then
                wsrep_log_error \
                    "mariabackup process is still running. Killing..."
                cleanup_pid $CHECK_PID "$BACKUP_PID"
            fi
        fi
        [ -f "$DATA/$IST_FILE" ] && rm -f "$DATA/$IST_FILE" || :
    fi

    if [ -n "$progress" -a -p "$progress" ]; then
        wsrep_log_info "Cleaning up fifo file: $progress"
        rm -f "$progress" || :
    fi

    wsrep_log_info "Cleaning up temporary directories"

    if [ "$WSREP_SST_OPT_ROLE" = 'joiner' ]; then
        [ -n "$STATDIR" -a -d "$STATDIR" ] && rm -rf "$STATDIR" || :
    else
        [ -n "$xtmpdir" -a -d "$xtmpdir" ] && rm -rf "$xtmpdir" || :
        [ -n "$itmpdir" -a -d "$itmpdir" ] && rm -rf "$itmpdir" || :
    fi

    # Final cleanup
    pgid=$(ps -o pgid= $$ 2>/dev/null | grep -o -E '[0-9]+' || :)

    # This means no setsid done in mysqld.
    # We don't want to kill mysqld here otherwise.
    if [ -n "$pgid" ]; then
        if [ $$ -eq $pgid ]; then
            # This means a signal was delivered to the process.
            # So, more cleanup.
            if [ $estatus -ge 128 ]; then
                kill -KILL -- -$$ || :
            fi
        fi
    fi

    if [ -n "${SST_PID:-}" ]; then
        [ -f "$SST_PID" ] && rm -f "$SST_PID" || :
    fi

    exit $estatus
}

setup_ports()
{
    SST_PORT="$WSREP_SST_OPT_PORT"
    if [ "$WSREP_SST_OPT_ROLE" = 'donor' ]; then
        REMOTEIP="$WSREP_SST_OPT_HOST"
        lsn="$WSREP_SST_OPT_LSN"
        sst_ver="$WSREP_SST_OPT_SST_VER"
    fi
}

#
# Waits ~30 seconds for socat or nc to open the port and
# then reports ready, regardless of timeout.
#
wait_for_listen()
{
    for i in {1..150}; do
        if check_port "" "$SST_PORT" 'socat|nc'; then
            break
        fi
        sleep 0.2
    done
    echo "ready $ADDR:$SST_PORT/$MODULE/$lsn/$sst_ver"
}

check_extra()
{
    local use_socket=1
    if [ $uextra -eq 1 ]; then
        local thread_handling=$(parse_cnf '--mysqld' 'thread-handling')
        if [ "$thread_handling" = 'pool-of-threads' ]; then
            local eport=$(parse_cnf '--mysqld' 'extra-port')
            if [ -n "$eport" ]; then
                # mariabackup works only locally.
                # Hence, setting host to 127.0.0.1 unconditionally:
                wsrep_log_info "SST through extra_port $eport"
                INNOEXTRA="$INNOEXTRA --host=127.0.0.1 --port=$eport"
                use_socket=0
            else
                wsrep_log_error "Extra port $eport null, failing"
                exit 1
            fi
        else
            wsrep_log_info "Thread pool not set, ignore the option use_extra"
        fi
    fi
    if [ $use_socket -eq 1 -a -n "$WSREP_SST_OPT_SOCKET" ]; then
        INNOEXTRA="$INNOEXTRA --socket='$WSREP_SST_OPT_SOCKET'"
    fi
}

recv_joiner()
{
    local dir="$1"
    local msg="$2"
    local tmt=$3
    local checkf=$4
    local wait=$5

    if [ ! -d "$dir" ]; then
        # This indicates that IST is in progress
        return
    fi

    local ltcmd="$tcmd"
    if [ $tmt -gt 0 ]; then
        if [ -n "$(commandex timeout)" ]; then
            if timeout --help | grep -qw -F -- '-k'; then
                ltcmd="timeout -k $(( tmt+10 )) $tmt $tcmd"
            else
                ltcmd="timeout -s9 $tmt $tcmd"
            fi
        fi
    fi

    if [ $wait -ne 0 ]; then
        wait_for_listen &
    fi

    cd "$dir"
    set +e
    timeit "$msg" "$ltcmd | $strmcmd; RC=( "\${PIPESTATUS[@]}" )"
    set -e
    cd "$OLD_PWD"

    if [ ${RC[0]} -eq 124 ]; then
        wsrep_log_error "Possible timeout in receiving first data from" \
                        "donor in gtid stage: exit codes: ${RC[@]}"
        exit 32
    fi

    for ecode in "${RC[@]}"; do
        if [ $ecode -ne 0 ]; then
            wsrep_log_error "Error while getting data from donor node:" \
                            "exit codes: ${RC[@]}"
            exit 32
        fi
    done

    if [ $checkf -eq 1 ]; then
        if [ ! -r "$MAGIC_FILE" ]; then
            # this message should cause joiner to abort:
            wsrep_log_error "receiving process ended without creating" \
                            "magic file ($MAGIC_FILE)"
            wsrep_log_info "Contents of datadir:"
            wsrep_log_info $(ls -l "$dir/"*)
            exit 32
        fi
        # Select the "secret" tag whose value does not start
        # with a slash symbol. All new tags must to start with
        # the space and the slash symbol after the word "secret" -
        # to be removed by older versions of the SST scripts:
        SECRET=$(grep -m1 -E "^$SECRET_TAG[[:space:]]+[^/]" \
                      -- "$MAGIC_FILE" || :)
        # Check donor supplied secret:
        SECRET=$(trim_string "${SECRET#$SECRET_TAG}")
        if [ "$SECRET" != "$MY_SECRET" ]; then
            wsrep_log_error "Donor does not know my secret!"
            wsrep_log_info "Donor: '$SECRET', my: '$MY_SECRET'"
            exit 32
        fi
    fi
}

send_donor()
{
    local dir="$1"
    local msg="$2"

    cd "$dir"
    set +e
    timeit "$msg" "$strmcmd | $tcmd; RC=( "\${PIPESTATUS[@]}" )"
    set -e
    cd "$OLD_PWD"

    for ecode in "${RC[@]}"; do
        if [ $ecode -ne 0 ]; then
            wsrep_log_error "Error while sending data to joiner node:" \
                            "exit codes: ${RC[@]}"
            exit 32
        fi
    done
}

monitor_process()
{
    local sst_stream_pid=$1

    while :; do
        if ! ps -p "$WSREP_SST_OPT_PARENT" >/dev/null 2>&1; then
            wsrep_log_error \
                "Parent mysqld process (PID: $WSREP_SST_OPT_PARENT)" \
                "terminated unexpectedly."
            kill -- -"$WSREP_SST_OPT_PARENT"
            exit 32
        fi
        if ! ps -p "$sst_stream_pid" >/dev/null 2>&1; then
            break
        fi
        sleep 0.1
    done
}

[ -f "$MAGIC_FILE" ] && rm -f "$MAGIC_FILE"

read_cnf
setup_ports

if "$BACKUP_BIN" --help 2>/dev/null | grep -qw -F -- '--version-check'; then
    disver=' --no-version-check'
fi

OLD_PWD="$(pwd)"

if [ -n "$DATA" -a "$DATA" != '.' ]; then
    [ ! -d "$DATA" ] && mkdir -p "$DATA"
    cd "$DATA"
fi
DATA_DIR="$(pwd)"

cd "$OLD_PWD"

if [ $ssyslog -eq 1 ]; then
    if [ -n "$(commandex logger)" ]; then
        wsrep_log_info "Logging all stderr of SST/mariabackup to syslog"

        exec 2> >(logger -p daemon.err -t ${ssystag}wsrep-sst-$WSREP_SST_OPT_ROLE)

        wsrep_log_error()
        {
            logger -p daemon.err -t ${ssystag}wsrep-sst-$WSREP_SST_OPT_ROLE "$@"
        }

        wsrep_log_info()
        {
            logger -p daemon.info -t ${ssystag}wsrep-sst-$WSREP_SST_OPT_ROLE "$@"
        }
    else
        wsrep_log_error "logger not in path: $PATH. Ignoring"
    fi
    INNOAPPLY="2>&1 | logger -p daemon.err -t ${ssystag}innobackupex-apply"
    INNOMOVE="2>&1 | logger -p daemon.err -t ${ssystag}innobackupex-move"
    INNOBACKUP="2> >(logger -p daemon.err -t ${ssystag}innobackupex-backup)"
else
    if [ $sstlogarchive -eq 1 ]
    then
        ARCHIVETIMESTAMP=$(date '+%Y.%m.%d-%H.%M.%S.%N')

        if [ -n "$sstlogarchivedir" ]; then
            if [ ! -d "$sstlogarchivedir" ]; then
                if ! mkdir -p "$sstlogarchivedir"; then
                    sstlogarchivedir=""
                    wsrep_log_warning \
                        "Unable to create '$sstlogarchivedir' directory"
                fi
            elif [ ! -w "$sstlogarchivedir" ]; then
                sstlogarchivedir=""
                wsrep_log_warning \
                    "The '$sstlogarchivedir' directory is not writtable"
            fi
        fi

        if [ -e "$INNOAPPLYLOG" ]; then
            if [ -n "$sstlogarchivedir" ]; then
                newfile=$(basename "$INNOAPPLYLOG")
                newfile="$sstlogarchivedir/$newfile.$ARCHIVETIMESTAMP"
            else
                newfile="$INNOAPPLYLOG.$ARCHIVETIMESTAMP"
            fi
            wsrep_log_info "Moving '$INNOAPPLYLOG' to '$newfile'"
            mv "$INNOAPPLYLOG" "$newfile" && gzip "$newfile" || \
                wsrep_log_warning "Failed to archive log file ('$newfile')"
        fi

        if [ -e "$INNOMOVELOG" ]; then
            if [ -n "$sstlogarchivedir" ]; then
                newfile=$(basename "$INNOMOVELOG")
                newfile="$sstlogarchivedir/$newfile.$ARCHIVETIMESTAMP"
            else
                newfile="$INNOMOVELOG.$ARCHIVETIMESTAMP"
            fi
            wsrep_log_info "Moving '$INNOMOVELOG' to '$newfile'"
            mv "$INNOMOVELOG" "$newfile" && gzip "$newfile" || \
                wsrep_log_warning "Failed to archive log file ('$newfile')"
        fi

        if [ -e "$INNOBACKUPLOG" ]; then
            if [ -n "$sstlogarchivedir" ]; then
                newfile=$(basename "$INNOBACKUPLOG")
                newfile="$sstlogarchivedir/$newfile.$ARCHIVETIMESTAMP"
            else
                newfile="$INNOBACKUPLOG.$ARCHIVETIMESTAMP"
            fi
            wsrep_log_info "Moving '$INNOBACKUPLOG' to '$newfile'"
            mv "$INNOBACKUPLOG" "$newfile" && gzip "$newfile" || \
                wsrep_log_warning "Failed to archive log file ('$newfile')"
        fi
    fi
    INNOAPPLY="> '$INNOAPPLYLOG' 2>&1"
    INNOMOVE="> '$INNOMOVELOG' 2>&1"
    INNOBACKUP="2> '$INNOBACKUPLOG'"
fi

setup_commands()
{
    local mysqld_args=""
    if [ -n "$WSREP_SST_OPT_MYSQLD" ]; then
        mysqld_args=" --mysqld-args $WSREP_SST_OPT_MYSQLD"
    fi
    local recovery=""
    if [ -n "$INNODB_FORCE_RECOVERY" ]; then
        recovery=" --innodb-force-recovery=$INNODB_FORCE_RECOVERY"
    fi
    INNOAPPLY="$BACKUP_BIN --prepare$disver$recovery${iapts:+ }$iapts$INNOEXTRA --target-dir='$DATA' --datadir='$DATA'$mysqld_args $INNOAPPLY"
    INNOMOVE="$BACKUP_BIN$WSREP_SST_OPT_CONF --move-back$disver${impts:+ }$impts$INNOEXTRA --force-non-empty-directories --target-dir='$DATA' --datadir='${TDATA:-$DATA}' $INNOMOVE"
    INNOBACKUP="$BACKUP_BIN$WSREP_SST_OPT_CONF --backup$disver${iopts:+ }$iopts$tmpopts$INNOEXTRA --galera-info --stream=$sfmt --target-dir='$itmpdir' --datadir='$DATA'$mysqld_args $INNOBACKUP"
}

get_stream
get_transfer

if [ "$WSREP_SST_OPT_ROLE" = 'donor' ]; then

    trap cleanup_at_exit EXIT

    if [ $WSREP_SST_OPT_BYPASS -eq 0 ]
    then
        if [ -z "$sst_ver" ]; then
            wsrep_log_error "Upgrade joiner to 5.6.21 or higher for backup locks support"
            wsrep_log_error "The joiner is not supported for this version of donor"
            exit 93
        fi

        tmpdir=$(parse_cnf "$encgroups" 'tmpdir')
        if [ -z "$tmpdir" ]; then
            xtmpdir="$(mktemp -d)"
        elif [ "$OS" = 'Linux' ]; then
            xtmpdir=$(mktemp '-d' "--tmpdir=$tmpdir")
        else
            xtmpdir=$(TMPDIR="$tmpdir"; mktemp '-d')
        fi

        wsrep_log_info "Using '$xtmpdir' as mariabackup temporary directory"
        tmpopts=" --tmpdir='$xtmpdir'"

        itmpdir="$(mktemp -d)"
        wsrep_log_info "Using '$itmpdir' as mariabackup working directory"

        usrst=0
        if [ -n "$WSREP_SST_OPT_USER" ]; then
           INNOEXTRA="$INNOEXTRA --user='$WSREP_SST_OPT_USER'"
           usrst=1
        fi

        if [ -n "$WSREP_SST_OPT_PSWD" ]; then
            export MYSQL_PWD="$WSREP_SST_OPT_PSWD"
        elif [ $usrst -eq 1 ]; then
            # Empty password, used for testing, debugging etc.
            unset MYSQL_PWD
        fi

        check_extra

        wsrep_log_info "Streaming GTID file before SST"

        # Store donor's wsrep GTID (state ID) and wsrep_gtid_domain_id
        # (separated by a space).
        echo "$WSREP_SST_OPT_GTID $WSREP_SST_OPT_GTID_DOMAIN_ID" > "$MAGIC_FILE"

        if [ -n "$WSREP_SST_OPT_REMOTE_PSWD" ]; then
            # Let joiner know that we know its secret
            echo "$SECRET_TAG $WSREP_SST_OPT_REMOTE_PSWD" >> "$MAGIC_FILE"
        fi

        ttcmd="$tcmd"

        if [ -n "$scomp" ]; then
            tcmd="$scomp | $tcmd"
        fi

        get_keys
        if [ $encrypt -eq 1 ]; then
            tcmd="$ecmd | $tcmd"
        fi

        send_donor "$DATA" "$stagemsg-gtid"

        # Restore the transport commmand to its original state
        tcmd="$ttcmd"

        if [ -n "$progress" ]; then
            get_footprint
            tcmd="$pcmd | $tcmd"
        elif [ -n "$rlimit" ]; then
            adjust_progress
            tcmd="$pcmd | $tcmd"
        fi

        wsrep_log_info "Sleeping before data transfer for SST"
        sleep 10

        wsrep_log_info "Streaming the backup to joiner at $REMOTEIP:$SST_PORT"

        # Add compression to the head of the stream (if specified)
        if [ -n "$scomp" ]; then
            tcmd="$scomp | $tcmd"
        fi

        # Add encryption to the head of the stream (if specified)
        if [ $encrypt -eq 1 ]; then
            tcmd="$ecmd | $tcmd"
        fi

        iopts="--databases-exclude='lost+found'${iopts:+ }$iopts"

        if [ ${FORCE_FTWRL:-0} -eq 1 ]; then
            wsrep_log_info "Forcing FTWRL due to environment variable" \
                           "FORCE_FTWRL equal to $FORCE_FTWRL"
            iopts="--no-backup-locks${iopts:+ }$iopts"
        fi

        # if compression is enabled for backup files, then add the
        # appropriate options to the mariabackup command line:
        if [ "$compress" != 'none' ]; then
            iopts="--compress${compress:+=$compress}${iopts:+ }$iopts"
            if [ -n "$compress_threads" ]; then
                iopts="--compress-threads=$compress_threads${iopts:+ }$iopts"
            fi
            if [ -n "$compress_chunk" ]; then
                iopts="--compress-chunk-size=$compress_chunk${iopts:+ }$iopts"
            fi
        fi

        if [ -n "$backup_threads" ]; then
            iopts="--parallel=$backup_threads${iopts:+ }$iopts"
        fi

        max_binlogs=$(parse_cnf "$encgroups" 'sst-max-binlogs')
        if [ -n "$max_binlogs" ]; then
            iopts="--sst-max-binlogs=$max_binlogs${iopts:+ }$iopts"
        fi

        setup_commands

        set +e
        timeit "$stagemsg-SST" "$INNOBACKUP | $tcmd; RC=( "\${PIPESTATUS[@]}" )"
        set -e

        if [ ${RC[0]} -ne 0 ]; then
            wsrep_log_error "mariabackup finished with error: ${RC[0]}." \
                            "Check syslog or '$INNOBACKUPLOG' for details"
            exit 22
        elif [ ${RC[$(( ${#RC[@]}-1 ))]} -eq 1 ]; then
            wsrep_log_error "$tcmd finished with error: ${RC[1]}"
            exit 22
        fi

        # mariabackup implicitly writes PID to fixed location in $xtmpdir
        BACKUP_PID="$xtmpdir/xtrabackup_pid"

    else # BYPASS FOR IST

        wsrep_log_info "Bypassing the SST for IST"
        echo "continue" # now server can resume updating data

        # Store donor's wsrep GTID (state ID) and wsrep_gtid_domain_id
        # (separated by a space).
        echo "$WSREP_SST_OPT_GTID $WSREP_SST_OPT_GTID_DOMAIN_ID" > "$MAGIC_FILE"
        echo "1" > "$DATA/$IST_FILE"

        if [ -n "$scomp" ]; then
            tcmd="$scomp | $tcmd"
        fi

        get_keys
        if [ $encrypt -eq 1 ]; then
            tcmd="$ecmd | $tcmd"
        fi

        strmcmd="$strmcmd '$IST_FILE'"

        send_donor "$DATA" "$stagemsg-IST"

    fi

    echo "done $WSREP_SST_OPT_GTID"
    wsrep_log_info "Total time on donor: $totime seconds"

else # joiner

    [ -e "$SST_PROGRESS_FILE" ] && \
        wsrep_log_info "Stale sst_in_progress file: $SST_PROGRESS_FILE"
    [ -n "$SST_PROGRESS_FILE" ] && touch "$SST_PROGRESS_FILE"

    # if no command line argument and INNODB_DATA_HOME_DIR environment
    # variable is not set, try to get it from the my.cnf:
    if [ -z "$INNODB_DATA_HOME_DIR" ]; then
        INNODB_DATA_HOME_DIR=$(parse_cnf '--mysqld' 'innodb-data-home-dir')
        INNODB_DATA_HOME_DIR=$(trim_dir "$INNODB_DATA_HOME_DIR")
    fi

    if [ -n "$INNODB_DATA_HOME_DIR" -a "$INNODB_DATA_HOME_DIR" != '.' ]; then
        # handle both relative and absolute paths:
        cd "$DATA"
        [ ! -d "$INNODB_DATA_HOME_DIR" ] && mkdir -p "$INNODB_DATA_HOME_DIR"
        cd "$INNODB_DATA_HOME_DIR"
        ib_home_dir="$(pwd)"
        cd "$OLD_PWD"
    fi

    # if no command line argument and INNODB_LOG_GROUP_HOME is not set,
    # then try to get it from the my.cnf:
    if [ -z "$INNODB_LOG_GROUP_HOME" ]; then
        INNODB_LOG_GROUP_HOME=$(parse_cnf '--mysqld' 'innodb-log-group-home-dir')
        INNODB_LOG_GROUP_HOME=$(trim_dir "$INNODB_LOG_GROUP_HOME")
    fi

    if [ -n "$INNODB_LOG_GROUP_HOME" -a "$INNODB_LOG_GROUP_HOME" != '.' ]; then
        # handle both relative and absolute paths:
        cd "$DATA"
        [ ! -d "$INNODB_LOG_GROUP_HOME" ] && mkdir -p "$INNODB_LOG_GROUP_HOME"
        cd "$INNODB_LOG_GROUP_HOME"
        ib_log_dir="$(pwd)"
        cd "$OLD_PWD"
    fi

    # if no command line argument and INNODB_UNDO_DIR is not set,
    # then try to get it from the my.cnf:
    if [ -z "$INNODB_UNDO_DIR" ]; then
        INNODB_UNDO_DIR=$(parse_cnf '--mysqld' 'innodb-undo-directory')
        INNODB_UNDO_DIR=$(trim_dir "$INNODB_UNDO_DIR")
    fi

    if [ -n "$INNODB_UNDO_DIR" -a "$INNODB_UNDO_DIR" != '.' ]; then
        # handle both relative and absolute paths:
        cd "$DATA"
        [ ! -d "$INNODB_UNDO_DIR" ] && mkdir -p "$INNODB_UNDO_DIR"
        cd "$INNODB_UNDO_DIR"
        ib_undo_dir="$(pwd)"
        cd "$OLD_PWD"
    fi

    if [ -n "$backup_threads" ]; then
        impts="--parallel=$backup_threads${impts:+ }$impts"
    fi

    SST_PID="$WSREP_SST_OPT_DATA/wsrep_sst.pid"

    # give some time for previous SST to complete:
    check_round=0
    while check_pid "$SST_PID" 0; do
        wsrep_log_info "previous SST is not completed, waiting for it to exit"
        check_round=$(( check_round + 1 ))
        if [ $check_round -eq 10 ]; then
            wsrep_log_error "previous SST script still running."
            exit 114 # EALREADY
        fi
        sleep 1
    done

    trap simple_cleanup EXIT
    echo $$ > "$SST_PID"

    stagemsg='Joiner-Recv'

    MODULE="${WSREP_SST_OPT_MODULE:-xtrabackup_sst}"

    [ -f "$DATA/$IST_FILE" ] && rm -f "$DATA/$IST_FILE"

    # May need xtrabackup_checkpoints later on
    [ -f "$DATA/xtrabackup_binary" ]      && rm -f "$DATA/xtrabackup_binary"
    [ -f "$DATA/xtrabackup_galera_info" ] && rm -f "$DATA/xtrabackup_galera_info"

    ADDR="$WSREP_SST_OPT_HOST"

    if [ "${tmode#VERIFY}" != "$tmode" ]; then
        # backward-incompatible behavior:
        CN=""
        if [ -n "$tpem" ]; then
            # find out my Common Name
            get_openssl
            if [ -z "$OPENSSL_BINARY" ]; then
                wsrep_log_error \
                    'openssl not found but it is required for authentication'
                exit 42
            fi
            CN=$("$OPENSSL_BINARY" x509 -noout -subject -in "$tpem" | \
                 tr ',' '\n' | grep -F 'CN =' | cut -d '=' -f2 | sed s/^\ // | \
                 sed s/\ %//)
        fi
        MY_SECRET="$(wsrep_gen_secret)"
        # Add authentication data to address
        ADDR="$CN:$MY_SECRET@$ADDR"
    else
        MY_SECRET="" # for check down in recv_joiner()
    fi

    trap cleanup_at_exit EXIT

    if [ -n "$progress" ]; then
        adjust_progress
        tcmd="$tcmd | $pcmd"
    fi

    get_keys
    if [ $encrypt -eq 1 ]; then
        strmcmd="$ecmd | $strmcmd"
    fi

    if [ -n "$sdecomp" ]; then
        strmcmd="$sdecomp | $strmcmd"
    fi

    check_sockets_utils

    STATDIR="$(mktemp -d)"
    MAGIC_FILE="$STATDIR/$INFO_FILE"

    recv_joiner "$STATDIR" "$stagemsg-gtid" $stimeout 1 1

    if ! ps -p "$WSREP_SST_OPT_PARENT" >/dev/null 2>&1; then
        wsrep_log_error "Parent mysqld process (PID: $WSREP_SST_OPT_PARENT)" \
                        "terminated unexpectedly."
        exit 32
    fi

    if [ ! -r "$STATDIR/$IST_FILE" ]; then

        if [ -d "$DATA/.sst" ]; then
            wsrep_log_info \
                "WARNING: Stale temporary SST directory:" \
                "'$DATA/.sst' from previous state transfer, removing..."
            rm -rf "$DATA/.sst"
        fi
        mkdir -p "$DATA/.sst"
        (recv_joiner "$DATA/.sst" "$stagemsg-SST" 0 0 0) &
        jpid=$!
        wsrep_log_info "Proceeding with SST"

        get_binlog

        if [ -n "$WSREP_SST_OPT_BINLOG" ]; then
            binlog_dir=$(dirname "$WSREP_SST_OPT_BINLOG")
            binlog_base=$(basename "$WSREP_SST_OPT_BINLOG")
            binlog_index="$WSREP_SST_OPT_BINLOG_INDEX"
            cd "$DATA"
            wsrep_log_info "Cleaning the old binary logs"
            # If there is a file with binlogs state, delete it:
            [ -f "$binlog_base.state" ] && rm -f "$binlog_base.state" >&2
            # Clean up the old binlog files and index:
            if [ -f "$binlog_index" ]; then
                while read bin_file || [ -n "$bin_file" ]; do
                    rm -f "$bin_file" >&2 || :
                done < "$binlog_index"
                rm -f "$binlog_index" >&2
            fi
            if [ -n "$binlog_dir" -a "$binlog_dir" != '.' -a \
                 -d "$binlog_dir" ]
            then
                cd "$binlog_dir"
                if [ "$(pwd)" != "$DATA_DIR" ]; then
                    wsrep_log_info \
                       "Cleaning the binlog directory '$binlog_dir' as well"
                fi
            fi
            rm -f "$binlog_base".[0-9]* >&2 || :
            cd "$OLD_PWD"
        fi

        wsrep_log_info \
            "Cleaning the existing datadir and innodb-data/log directories"
        if [ "$OS" = 'FreeBSD' ]; then
            find -E ${ib_home_dir:+"$ib_home_dir"} \
                    ${ib_undo_dir:+"$ib_undo_dir"} \
                    ${ib_log_dir:+"$ib_log_dir"} \
                    "$DATA" -mindepth 1 -prune -regex "$cpat" \
                    -o -exec rm -rf {} >&2 \+
        else
            find ${ib_home_dir:+"$ib_home_dir"} \
                 ${ib_undo_dir:+"$ib_undo_dir"} \
                 ${ib_log_dir:+"$ib_log_dir"} \
                 "$DATA" -mindepth 1 -prune -regex "$cpat" \
                 -o -exec rm -rf {} >&2 \+
        fi

        TDATA="$DATA"
        DATA="$DATA/.sst"

        MAGIC_FILE="$DATA/$INFO_FILE"
        wsrep_log_info "Waiting for SST streaming to complete!"
        monitor_process $jpid

        if [ ! -s "$DATA/xtrabackup_checkpoints" ]; then
            wsrep_log_error "xtrabackup_checkpoints missing," \
                            "failed mariabackup/SST on donor"
            exit 2
        fi

        # Compact backups are not supported by mariabackup
        if grep -qw -F 'compact = 1' "$DATA/xtrabackup_checkpoints"; then
            wsrep_log_info "Index compaction detected"
            wsrel_log_error "Compact backups are not supported by mariabackup"
            exit 2
        fi

        qpfiles=$(find "$DATA" -maxdepth 1 -type f -name '*.qp' -print -quit)
        if [ -n "$qpfiles" ]; then
            wsrep_log_info "Compressed qpress files found"

            if [ -z "$(commandex qpress)" ]; then
                wsrep_log_error "qpress utility not found in the path"
                exit 22
            fi

            get_proc

            dcmd="xargs -n 2 qpress -dT$nproc"

            if [ -n "$progress" ] && \
               pv --help | grep -qw -F -- '--line-mode'
            then
                count=$(find "$DATA" -type f -name '*.qp' | wc -l)
                count=$(( count*2 ))
                pvopts="-f -s $count -l -N Decompression"
                if pv --help | grep -qw -F -- '-F'; then
                    pvopts="$pvopts -F '%N => Rate:%r Elapsed:%t %e Progress: [%b/$count]'"
                fi
                pcmd="pv $pvopts"
                adjust_progress
                dcmd="$pcmd | $dcmd"
            fi

            # Decompress the qpress files
            wsrep_log_info "Decompression with $nproc threads"
            timeit 'Joiner-Decompression' \
                   "find '$DATA' -type f -name '*.qp' -printf '%p\n%h\n' | \
                   $dcmd"
            extcode=$?

            if [ $extcode -eq 0 ]; then
                wsrep_log_info "Removing qpress files after decompression"
                find "$DATA" -type f -name '*.qp' -delete
                if [ $? -ne 0 ]; then
                    wsrep_log_error \
                        "Something went wrong with deletion of qpress files." \
                        "Investigate"
                fi
            else
                wsrep_log_error "Decompression failed. Exit code: $extcode"
                exit 22
            fi
        fi

        wsrep_log_info "Preparing the backup at $DATA"
        setup_commands
        timeit 'mariabackup prepare stage' "$INNOAPPLY"
        if [ $? -ne 0 ]; then
            wsrep_log_error "mariabackup apply finished with errors." \
                            "Check syslog or '$INNOAPPLYLOG' for details."
            exit 22
        fi

        if [ -n "$WSREP_SST_OPT_BINLOG" ]; then
            cd "$DATA"
            binlogs=""
            if [ -f 'xtrabackup_binlog_info' ]; then
                NL=$'\n'
                while read bin_string || [ -n "$bin_string" ]; do
                    bin_file=$(echo "$bin_string" | cut -f1)
                    if [ -f "$bin_file" ]; then
                        binlogs="$binlogs${binlogs:+$NL}$bin_file"
                    fi
                done < 'xtrabackup_binlog_info'
            else
                binlogs=$(ls -d -1 "$binlog_base".[0-9]* 2>/dev/null || :)
            fi
            cd "$DATA_DIR"
            if [ -n "$binlog_dir" -a "$binlog_dir" != '.' ]; then
                [ ! -d "$binlog_dir" ] && mkdir -p "$binlog_dir"
            fi
            index_dir=$(dirname "$binlog_index");
            if [ -n "$index_dir" -a "$index_dir" != '.' ]; then
                [ ! -d "$index_dir" ] && mkdir -p "$index_dir"
            fi
            if [ -n "$binlogs" ]; then
                wsrep_log_info "Moving binary logs to $binlog_dir"
                echo "$binlogs" | \
                while read bin_file || [ -n "$bin_file" ]; do
                    mv "$DATA/$bin_file" "$binlog_dir"
                    echo "$binlog_dir${binlog_dir:+/}$bin_file" >> "$binlog_index"
                done
            fi
            cd "$OLD_PWD"
        fi

        MAGIC_FILE="$TDATA/$INFO_FILE"

        wsrep_log_info "Moving the backup to $TDATA"
        timeit 'mariabackup move stage' "$INNOMOVE"
        if [ $? -eq 0 ]; then
            wsrep_log_info "Move successful, removing $DATA"
            rm -rf "$DATA"
            DATA="$TDATA"
        else
            wsrep_log_error "Move failed, keeping '$DATA' for further diagnosis"
            wsrep_log_error "Check syslog or '$INNOMOVELOG' for details"
            exit 22
        fi

    else

        wsrep_log_info "'$IST_FILE' received from donor: Running IST"
        if [ $WSREP_SST_OPT_BYPASS -eq 0 ]; then
            readonly WSREP_SST_OPT_BYPASS=1
            readonly WSREP_TRANSFER_TYPE='IST'
        fi

    fi

    if [ ! -r "$MAGIC_FILE" ]; then
        wsrep_log_error "SST magic file '$MAGIC_FILE' not found/readable"
        exit 2
    fi

    # Remove special tags from the magic file, and from the output:
    coords=$(grep -v -E "^$SECRET_TAG[[:space:]]" -- "$MAGIC_FILE")
    wsrep_log_info "Galera co-ords from recovery: $coords"
    echo "$coords" # Output : UUID:seqno wsrep_gtid_domain_id

    wsrep_log_info "Total time on joiner: $totime seconds"
fi

wsrep_log_info "$WSREP_METHOD $WSREP_TRANSFER_TYPE completed on $WSREP_SST_OPT_ROLE"
exit 0