Merge branch 'tempesta-tech-sysprg/MDEV-17835' into 10.3bb-10.3-MDEV-17835

16 files changed, 277 insertions, 1972 deletions

diff --git a/.gitignore b/.gitignore
index 3f28c0fb66b..859551d62a0 100644
--- a/.gitignore
+++ b/.gitignore
@@ -128,8 +128,6 @@ scripts/wsrep_sst_mysqldump
 scripts/wsrep_sst_rsync
 scripts/wsrep_sst_rsync_wan
 scripts/wsrep_sst_mariabackup
-scripts/wsrep_sst_xtrabackup
-scripts/wsrep_sst_xtrabackup-v2
 scripts/maria_add_gis_sp.sql
 scripts/maria_add_gis_sp_bootstrap.sql
 scripts/galera_new_cluster
diff --git a/Docs/README-wsrep b/Docs/README-wsrep
index 6bb329e9396..02642e80efb 100644
--- a/Docs/README-wsrep
+++ b/Docs/README-wsrep
@@ -137,7 +137,7 @@ Additional packages to consider (if not yet installed):
    * galera (multi-master replication provider, https://launchpad.net/galera)
    * MySQL-client-community (for connecting to server and mysqldump-based SST)
    * rsync (for rsync-based SST)
-   * xtrabackup and nc (for xtrabackup-based SST)
+   * mariabackup and nc (for mariabackup-based SST)
 
 2.2 Upgrade system tables.
 
@@ -380,14 +380,14 @@ to join or start a cluster.
 wsrep_sst_method=rsync
    What method to use to copy database state to a newly joined node. Supported
    methods:
-   - mysqldump:  slow (except for small datasets) but allows for upgrade
-                 between major MySQL versions or InnoDB features.
-   - rsync:      much faster on large datasets (default).
-   - rsync_wan:  same as rsync but with deltaxfer to minimize network traffic.
-   - xtrabackup: very fast and practically non-blocking SST method based on
-                 Percona's xtrabackup tool.
-
-   (for xtrabackup to work the following settings must be present in my.cnf
+   - mysqldump:   slow (except for small datasets) but allows for upgrade
+                  between major MySQL versions or InnoDB features.
+   - rsync:       much faster on large datasets (default).
+   - rsync_wan:   same as rsync but with deltaxfer to minimize network traffic.
+   - mariabackup: very fast and practically non-blocking SST method based on
+                  mariabackup tool (enhanced version of Percona's xtrabackup).
+
+   (for mariabackup to work the following settings must be present in my.cnf
     on all nodes:
       [mysqld]
       wsrep_sst_auth=root:<root password>
diff --git a/mysql-test/suite/galera/r/galera_autoinc_sst_mariabackup.result b/mysql-test/suite/galera/r/galera_autoinc_sst_mariabackup.result
index d0fac1e3d14..91f45c93257 100644
--- a/mysql-test/suite/galera/r/galera_autoinc_sst_mariabackup.result
+++ b/mysql-test/suite/galera/r/galera_autoinc_sst_mariabackup.result
@@ -1,4 +1,6 @@
 connection node_1;
+connection node_2;
+connection node_1;
 CREATE TABLE t1 (f1 INTEGER PRIMARY KEY AUTO_INCREMENT) ENGINE=InnoDB;
 CREATE PROCEDURE p1 ()
 BEGIN
diff --git a/mysql-test/suite/galera/r/galera_ist_innodb_flush_logs.result b/mysql-test/suite/galera/r/galera_ist_innodb_flush_logs.result
new file mode 100644
index 00000000000..481a85711be
--- /dev/null
+++ b/mysql-test/suite/galera/r/galera_ist_innodb_flush_logs.result
@@ -0,0 +1,204 @@
+Performing State Transfer on a server that has been killed and restarted
+connection node_1;
+CREATE TABLE t1 (f1 CHAR(255)) ENGINE=InnoDB;
+SET AUTOCOMMIT=OFF;
+START TRANSACTION;
+INSERT INTO t1 VALUES ('node1_committed_before');
+INSERT INTO t1 VALUES ('node1_committed_before');
+INSERT INTO t1 VALUES ('node1_committed_before');
+INSERT INTO t1 VALUES ('node1_committed_before');
+INSERT INTO t1 VALUES ('node1_committed_before');
+COMMIT;
+connection node_2;
+SET AUTOCOMMIT=OFF;
+START TRANSACTION;
+INSERT INTO t1 VALUES ('node2_committed_before');
+INSERT INTO t1 VALUES ('node2_committed_before');
+INSERT INTO t1 VALUES ('node2_committed_before');
+INSERT INTO t1 VALUES ('node2_committed_before');
+INSERT INTO t1 VALUES ('node2_committed_before');
+COMMIT;
+Killing server ...
+connection node_1;
+SET AUTOCOMMIT=OFF;
+START TRANSACTION;
+INSERT INTO t1 VALUES ('node1_committed_during');
+INSERT INTO t1 VALUES ('node1_committed_during');
+INSERT INTO t1 VALUES ('node1_committed_during');
+INSERT INTO t1 VALUES ('node1_committed_during');
+INSERT INTO t1 VALUES ('node1_committed_during');
+COMMIT;
+START TRANSACTION;
+INSERT INTO t1 VALUES ('node1_to_be_committed_after');
+INSERT INTO t1 VALUES ('node1_to_be_committed_after');
+INSERT INTO t1 VALUES ('node1_to_be_committed_after');
+INSERT INTO t1 VALUES ('node1_to_be_committed_after');
+INSERT INTO t1 VALUES ('node1_to_be_committed_after');
+connect node_1a_galera_st_kill_slave, 127.0.0.1, root, , test, $NODE_MYPORT_1;
+SET AUTOCOMMIT=OFF;
+START TRANSACTION;
+INSERT INTO t1 VALUES ('node1_to_be_rollbacked_after');
+INSERT INTO t1 VALUES ('node1_to_be_rollbacked_after');
+INSERT INTO t1 VALUES ('node1_to_be_rollbacked_after');
+INSERT INTO t1 VALUES ('node1_to_be_rollbacked_after');
+INSERT INTO t1 VALUES ('node1_to_be_rollbacked_after');
+connection node_2;
+Performing --wsrep-recover ...
+Starting server ...
+Using --wsrep-start-position when starting mysqld ...
+SET AUTOCOMMIT=OFF;
+START TRANSACTION;
+INSERT INTO t1 VALUES ('node2_committed_after');
+INSERT INTO t1 VALUES ('node2_committed_after');
+INSERT INTO t1 VALUES ('node2_committed_after');
+INSERT INTO t1 VALUES ('node2_committed_after');
+INSERT INTO t1 VALUES ('node2_committed_after');
+COMMIT;
+connection node_1;
+INSERT INTO t1 VALUES ('node1_to_be_committed_after');
+INSERT INTO t1 VALUES ('node1_to_be_committed_after');
+INSERT INTO t1 VALUES ('node1_to_be_committed_after');
+INSERT INTO t1 VALUES ('node1_to_be_committed_after');
+INSERT INTO t1 VALUES ('node1_to_be_committed_after');
+COMMIT;
+SET AUTOCOMMIT=OFF;
+START TRANSACTION;
+INSERT INTO t1 VALUES ('node1_committed_after');
+INSERT INTO t1 VALUES ('node1_committed_after');
+INSERT INTO t1 VALUES ('node1_committed_after');
+INSERT INTO t1 VALUES ('node1_committed_after');
+INSERT INTO t1 VALUES ('node1_committed_after');
+COMMIT;
+connection node_1a_galera_st_kill_slave;
+INSERT INTO t1 VALUES ('node1_to_be_rollbacked_after');
+INSERT INTO t1 VALUES ('node1_to_be_rollbacked_after');
+INSERT INTO t1 VALUES ('node1_to_be_rollbacked_after');
+INSERT INTO t1 VALUES ('node1_to_be_rollbacked_after');
+INSERT INTO t1 VALUES ('node1_to_be_rollbacked_after');
+ROLLBACK;
+SELECT COUNT(*) = 35 FROM t1;
+COUNT(*) = 35
+1
+SELECT COUNT(*) = 0 FROM (SELECT COUNT(*) AS c, f1 FROM t1 GROUP BY f1 HAVING c NOT IN (5, 10)) AS a1;
+COUNT(*) = 0
+1
+COMMIT;
+SET AUTOCOMMIT=ON;
+connection node_1;
+SELECT COUNT(*) = 35 FROM t1;
+COUNT(*) = 35
+1
+SELECT COUNT(*) = 0 FROM (SELECT COUNT(*) AS c, f1 FROM t1 GROUP BY f1 HAVING c NOT IN (5, 10)) AS a1;
+COUNT(*) = 0
+1
+DROP TABLE t1;
+COMMIT;
+SET AUTOCOMMIT=ON;
+Performing State Transfer on a server that has been killed and restarted
+while a DDL was in progress on it
+connection node_1;
+CREATE TABLE t1 (f1 CHAR(255)) ENGINE=InnoDB;
+SET AUTOCOMMIT=OFF;
+START TRANSACTION;
+INSERT INTO t1 VALUES ('node1_committed_before');
+INSERT INTO t1 VALUES ('node1_committed_before');
+INSERT INTO t1 VALUES ('node1_committed_before');
+INSERT INTO t1 VALUES ('node1_committed_before');
+INSERT INTO t1 VALUES ('node1_committed_before');
+connection node_2;
+START TRANSACTION;
+INSERT INTO t1 VALUES ('node2_committed_before');
+INSERT INTO t1 VALUES ('node2_committed_before');
+INSERT INTO t1 VALUES ('node2_committed_before');
+INSERT INTO t1 VALUES ('node2_committed_before');
+INSERT INTO t1 VALUES ('node2_committed_before');
+COMMIT;
+SET GLOBAL debug_dbug = 'd,sync.alter_opened_table';
+connection node_1;
+ALTER TABLE t1 ADD COLUMN f2 INTEGER;
+connection node_2;
+SET wsrep_sync_wait = 0;
+Killing server ...
+connection node_1;
+SET AUTOCOMMIT=OFF;
+START TRANSACTION;
+INSERT INTO t1 (f1) VALUES ('node1_committed_during');
+INSERT INTO t1 (f1) VALUES ('node1_committed_during');
+INSERT INTO t1 (f1) VALUES ('node1_committed_during');
+INSERT INTO t1 (f1) VALUES ('node1_committed_during');
+INSERT INTO t1 (f1) VALUES ('node1_committed_during');
+COMMIT;
+START TRANSACTION;
+INSERT INTO t1 (f1) VALUES ('node1_to_be_committed_after');
+INSERT INTO t1 (f1) VALUES ('node1_to_be_committed_after');
+INSERT INTO t1 (f1) VALUES ('node1_to_be_committed_after');
+INSERT INTO t1 (f1) VALUES ('node1_to_be_committed_after');
+INSERT INTO t1 (f1) VALUES ('node1_to_be_committed_after');
+connect node_1a_galera_st_kill_slave_ddl, 127.0.0.1, root, , test, $NODE_MYPORT_1;
+SET AUTOCOMMIT=OFF;
+START TRANSACTION;
+INSERT INTO t1 (f1) VALUES ('node1_to_be_rollbacked_after');
+INSERT INTO t1 (f1) VALUES ('node1_to_be_rollbacked_after');
+INSERT INTO t1 (f1) VALUES ('node1_to_be_rollbacked_after');
+INSERT INTO t1 (f1) VALUES ('node1_to_be_rollbacked_after');
+INSERT INTO t1 (f1) VALUES ('node1_to_be_rollbacked_after');
+connection node_2;
+Performing --wsrep-recover ...
+connection node_2;
+Starting server ...
+Using --wsrep-start-position when starting mysqld ...
+SET AUTOCOMMIT=OFF;
+START TRANSACTION;
+INSERT INTO t1 (f1) VALUES ('node2_committed_after');
+INSERT INTO t1 (f1) VALUES ('node2_committed_after');
+INSERT INTO t1 (f1) VALUES ('node2_committed_after');
+INSERT INTO t1 (f1) VALUES ('node2_committed_after');
+INSERT INTO t1 (f1) VALUES ('node2_committed_after');
+COMMIT;
+connection node_1;
+INSERT INTO t1 (f1) VALUES ('node1_to_be_committed_after');
+INSERT INTO t1 (f1) VALUES ('node1_to_be_committed_after');
+INSERT INTO t1 (f1) VALUES ('node1_to_be_committed_after');
+INSERT INTO t1 (f1) VALUES ('node1_to_be_committed_after');
+INSERT INTO t1 (f1) VALUES ('node1_to_be_committed_after');
+COMMIT;
+SET AUTOCOMMIT=OFF;
+START TRANSACTION;
+INSERT INTO t1 (f1) VALUES ('node1_committed_after');
+INSERT INTO t1 (f1) VALUES ('node1_committed_after');
+INSERT INTO t1 (f1) VALUES ('node1_committed_after');
+INSERT INTO t1 (f1) VALUES ('node1_committed_after');
+INSERT INTO t1 (f1) VALUES ('node1_committed_after');
+COMMIT;
+connection node_1a_galera_st_kill_slave_ddl;
+INSERT INTO t1 (f1) VALUES ('node1_to_be_rollbacked_after');
+INSERT INTO t1 (f1) VALUES ('node1_to_be_rollbacked_after');
+INSERT INTO t1 (f1) VALUES ('node1_to_be_rollbacked_after');
+INSERT INTO t1 (f1) VALUES ('node1_to_be_rollbacked_after');
+INSERT INTO t1 (f1) VALUES ('node1_to_be_rollbacked_after');
+ROLLBACK;
+SELECT COUNT(*) = 2 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 't1';
+COUNT(*) = 2
+1
+SELECT COUNT(*) = 35 FROM t1;
+COUNT(*) = 35
+1
+SELECT COUNT(*) = 0 FROM (SELECT COUNT(*) AS c, f1 FROM t1 GROUP BY f1 HAVING c NOT IN (5, 10)) AS a1;
+COUNT(*) = 0
+1
+COMMIT;
+SET AUTOCOMMIT=ON;
+connection node_1;
+SELECT COUNT(*) = 2 FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME = 't1';
+COUNT(*) = 2
+1
+SELECT COUNT(*) = 35 FROM t1;
+COUNT(*) = 35
+1
+SELECT COUNT(*) = 0 FROM (SELECT COUNT(*) AS c, f1 FROM t1 GROUP BY f1 HAVING c NOT IN (5, 10)) AS a1;
+COUNT(*) = 0
+1
+DROP TABLE t1;
+COMMIT;
+SET AUTOCOMMIT=ON;
+SET GLOBAL debug_dbug = $debug_orig;
diff --git a/mysql-test/suite/galera/t/galera_autoinc_sst_mariabackup.cnf b/mysql-test/suite/galera/t/galera_autoinc_sst_mariabackup.cnf
index 7e557717744..bd6bf9d4f98 100644
--- a/mysql-test/suite/galera/t/galera_autoinc_sst_mariabackup.cnf
+++ b/mysql-test/suite/galera/t/galera_autoinc_sst_mariabackup.cnf
@@ -9,4 +9,3 @@ wsrep_provider_options='base_port=@mysqld.1.#galera_port;gcache.size=1;pc.ignore
 
 [mysqld.2]
 wsrep_provider_options='base_port=@mysqld.2.#galera_port;gcache.size=1;pc.ignore_sb=true'
-
diff --git a/mysql-test/suite/galera/t/galera_autoinc_sst_mariabackup.test b/mysql-test/suite/galera/t/galera_autoinc_sst_mariabackup.test
index 731059dc584..9d5f821a170 100644
--- a/mysql-test/suite/galera/t/galera_autoinc_sst_mariabackup.test
+++ b/mysql-test/suite/galera/t/galera_autoinc_sst_mariabackup.test
@@ -8,6 +8,10 @@
 --source include/have_innodb.inc
 --source include/have_mariabackup.inc
 
+--let $node_1=node_1
+--let $node_2=node_2
+--source include/auto_increment_offset_save.inc
+
 --connection node_1
 --let $connection_id = `SELECT CONNECTION_ID()`
 
@@ -94,3 +98,7 @@ DROP TABLE t1;
 
 CALL mtr.add_suppression("gcs_caused\\(\\) returned -1 \\(Operation not permitted\\)");
 CALL mtr.add_suppression("WSREP: Action message in non-primary configuration from member 0");
+
+--let $node_1=node_1a
+--let $node_2=node_2a
+--source include/auto_increment_offset_restore.inc
diff --git a/mysql-test/suite/galera/t/galera_ist_innodb_flush_logs.cnf b/mysql-test/suite/galera/t/galera_ist_innodb_flush_logs.cnf
new file mode 100644
index 00000000000..7979b23e085
--- /dev/null
+++ b/mysql-test/suite/galera/t/galera_ist_innodb_flush_logs.cnf
@@ -0,0 +1,13 @@
+!include ../galera_2nodes.cnf
+
+[mysqld]
+wsrep_sst_method=mariabackup
+wsrep_sst_auth=root:
+
+innodb_flush_log_at_trx_commit=0
+
+[mysqld.1]
+wsrep_provider_options='base_port=@mysqld.1.#galera_port;pc.ignore_sb=true'
+
+[mysqld.2]
+wsrep_provider_options='base_port=@mysqld.2.#galera_port;pc.ignore_sb=true'
diff --git a/mysql-test/suite/galera/t/galera_ist_innodb_flush_logs.test b/mysql-test/suite/galera/t/galera_ist_innodb_flush_logs.test
new file mode 100644
index 00000000000..fd362a26840
--- /dev/null
+++ b/mysql-test/suite/galera/t/galera_ist_innodb_flush_logs.test
@@ -0,0 +1,13 @@
+#
+# This test performs server kill and IST while innodb_flush_logs_on_trx_commit = 0
+# This confirms that IST can properly catch up even in the face of relaxed single-node durability
+#
+#
+
+--source include/big_test.inc
+--source include/galera_cluster.inc
+--source include/have_innodb.inc
+--source include/have_mariabackup.inc
+
+--source suite/galera/include/galera_st_kill_slave.inc
+--source suite/galera/include/galera_st_kill_slave_ddl.inc
diff --git a/mysql-test/suite/galera/t/galera_ist_mariabackup_innodb_flush_logs.test b/mysql-test/suite/galera/t/galera_ist_mariabackup_innodb_flush_logs.test
index 07838702deb..fd362a26840 100644
--- a/mysql-test/suite/galera/t/galera_ist_mariabackup_innodb_flush_logs.test
+++ b/mysql-test/suite/galera/t/galera_ist_mariabackup_innodb_flush_logs.test
@@ -7,6 +7,7 @@
 --source include/big_test.inc
 --source include/galera_cluster.inc
 --source include/have_innodb.inc
+--source include/have_mariabackup.inc
 
 --source suite/galera/include/galera_st_kill_slave.inc
 --source suite/galera/include/galera_st_kill_slave_ddl.inc
diff --git a/mysql-test/suite/sys_vars/r/wsrep_sst_method_basic.result b/mysql-test/suite/sys_vars/r/wsrep_sst_method_basic.result
index cbdac640c36..51f167b8f47 100644
--- a/mysql-test/suite/sys_vars/r/wsrep_sst_method_basic.result
+++ b/mysql-test/suite/sys_vars/r/wsrep_sst_method_basic.result
@@ -33,6 +33,10 @@ SET @@global.wsrep_sst_method="xtrabackup-v2";
 SELECT @@global.wsrep_sst_method;
 @@global.wsrep_sst_method
 xtrabackup-v2
+SET @@global.wsrep_sst_method="mariabackup";
+SELECT @@global.wsrep_sst_method;
+@@global.wsrep_sst_method
+mariabackup
 SET @@global.wsrep_sst_method=default;
 SELECT @@global.wsrep_sst_method;
 @@global.wsrep_sst_method
diff --git a/mysql-test/suite/sys_vars/t/wsrep_sst_method_basic.test b/mysql-test/suite/sys_vars/t/wsrep_sst_method_basic.test
index 3f40a3922dd..be038eb4baf 100644
--- a/mysql-test/suite/sys_vars/t/wsrep_sst_method_basic.test
+++ b/mysql-test/suite/sys_vars/t/wsrep_sst_method_basic.test
@@ -23,10 +23,15 @@ SET @@global.wsrep_sst_method=rsync;
 SELECT @@global.wsrep_sst_method;
 SET @@global.wsrep_sst_method=mysqldump;
 SELECT @@global.wsrep_sst_method;
+# The xtrabackup and xtrabackup-v2 methods are obsolete,
+# but we can still select them (they will be automatically
+# replaced to mariabackup):
 SET @@global.wsrep_sst_method=xtrabackup;
 SELECT @@global.wsrep_sst_method;
 SET @@global.wsrep_sst_method="xtrabackup-v2";
 SELECT @@global.wsrep_sst_method;
+SET @@global.wsrep_sst_method="mariabackup";
+SELECT @@global.wsrep_sst_method;
 SET @@global.wsrep_sst_method=default;
 SELECT @@global.wsrep_sst_method;
 
diff --git a/scripts/CMakeLists.txt b/scripts/CMakeLists.txt
index 464c00d57da..901a774be4b 100644
--- a/scripts/CMakeLists.txt
+++ b/scripts/CMakeLists.txt
@@ -274,8 +274,6 @@ ELSE()
     SET(WSREP_SCRIPTS
       wsrep_sst_mysqldump
       wsrep_sst_rsync
-      wsrep_sst_xtrabackup
-      wsrep_sst_xtrabackup-v2
       wsrep_sst_mariabackup
     )
     # The following script is sourced from other SST scripts, so it should
diff --git a/scripts/wsrep_sst_xtrabackup-v2.sh b/scripts/wsrep_sst_xtrabackup-v2.sh
deleted file mode 100644
index 2de384806b2..00000000000
--- a/scripts/wsrep_sst_xtrabackup-v2.sh
+++ /dev/null
@@ -1,1260 +0,0 @@
-#!/bin/bash -ue
-# 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  02110-1301  USA.
-
-# Documentation: http://www.percona.com/doc/percona-xtradb-cluster/manual/xtrabackup_sst.html 
-# Make sure to read that before proceeding!
-
-
-
-
-. $(dirname $0)/wsrep_sst_common
-
-ealgo=""
-ekey=""
-ekeyfile=""
-encrypt=0
-nproc=1
-ecode=0
-ssyslog=""
-ssystag=""
-XTRABACKUP_PID=""
-tca=""
-tcert=""
-tkey=""
-sockopt=""
-progress=""
-ttime=0
-totime=0
-ecmd=""
-rlimit=""
-# Initially
-stagemsg="${WSREP_SST_OPT_ROLE}"
-cpat=""
-ib_home_dir=""
-ib_log_dir=""
-ib_undo_dir=""
-
-sfmt="tar"
-strmcmd=""
-tfmt=""
-tcmd=""
-rebuild=0
-rebuildcmd=""
-payload=0
-pvformat="-F '%N => Rate:%r Avg:%a Elapsed:%t %e Bytes: %b %p' "
-pvopts="-f  -i 10 -N $WSREP_SST_OPT_ROLE "
-STATDIR=""
-uextra=0
-disver=""
-
-tmpopts=""
-itmpdir=""
-xtmpdir=""
-
-scomp=""
-sdecomp=""
-ssl_dhparams=""
-
-ssl_cert=""
-ssl_ca=""
-ssl_key=""
-
-if pv --help 2>/dev/null | grep -q FORMAT;then
-    pvopts+=$pvformat
-fi
-pcmd="pv $pvopts"
-declare -a RC
-
-INNOBACKUPEX_BIN=innobackupex
-DATA="${WSREP_SST_OPT_DATA}"
-INFO_FILE="xtrabackup_galera_info"
-IST_FILE="xtrabackup_ist"
-MAGIC_FILE="${DATA}/${INFO_FILE}"
-
-# Setting the path for ss and ip
-export PATH="/usr/sbin:/sbin:$PATH"
-
-OS=$(uname)
-
-if ! which lsof > /dev/null; then
-    wsrep_log_error "lsof tool not found in PATH! Make sure you have it installed."
-    exit 2 # ENOENT
-fi
-
-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 || $encrypt -eq -1 ]];then 
-        return 
-    fi
-
-    if [[ $encrypt -eq 0 ]];then 
-        if $MY_PRINT_DEFAULTS xtrabackup | grep -q encrypt;then
-            wsrep_log_error "Unexpected option combination. SST may fail. Refer to http://www.percona.com/doc/percona-xtradb-cluster/manual/xtrabackup_sst.html "
-        fi
-        return
-    fi
-
-    if [[ $sfmt == 'tar' ]];then
-        wsrep_log_info "NOTE: Xtrabackup-based encryption - encrypt=1 - cannot be enabled with tar format"
-        encrypt=-1
-        return
-    fi
-
-    wsrep_log_info "Xtrabackup based encryption enabled in my.cnf - Supported only from Xtrabackup 2.1.4"
-
-    if [[ -z $ealgo ]];then
-        wsrep_log_error "FATAL: Encryption algorithm empty from my.cnf, bailing out"
-        exit 3
-    fi
-
-    if [[ -z $ekey && ! -r $ekeyfile ]];then
-        wsrep_log_error "FATAL: Either key or keyfile must be readable"
-        exit 3
-    fi
-
-    if [[ -z $ekey ]];then
-        ecmd="xbcrypt --encrypt-algo=$ealgo --encrypt-key-file=$ekeyfile"
-    else
-        wsrep_log_warning "Using the 'encrypt-key' option causes the encryption key"
-        wsrep_log_warning "to be set via the command-line and is considered insecure."
-        wsrep_log_warning "It is recommended to use the 'encrypt-key-file' option instead."
-
-        ecmd="xbcrypt --encrypt-algo=$ealgo --encrypt-key=$ekey"
-    fi
-
-    if [[ "$WSREP_SST_OPT_ROLE" == "joiner" ]];then
-        ecmd+=" -d"
-    fi
-
-    stagemsg+="-XB-Encrypted"
-}
-
-#
-# If the ssl_dhparams variable is already set, uses that as a source
-# of dh parameters for OpenSSL. Otherwise, looks for dhparams.pem in the
-# datadir, and creates it there if it can't find the file.
-# No input parameters
-#
-check_for_dhparams()
-{
-    if [[ -z "$ssl_dhparams" ]]; then
-        if ! [[ -r "$DATA/dhparams.pem" ]]; then
-            wsrep_check_programs openssl
-            wsrep_log_info "Could not find dhparams file, creating $DATA/dhparams.pem"
-
-            if ! openssl dhparam -out "$DATA/dhparams.pem" 2048 >/dev/null 2>&1
-            then
-                wsrep_log_error "******** FATAL ERROR ********************************* "
-                wsrep_log_error "* Could not create the dhparams.pem file with OpenSSL. "
-                wsrep_log_error "****************************************************** "
-                exit 22
-            fi
-        fi
-        ssl_dhparams="$DATA/dhparams.pem"
-    fi
-}
-
-#
-# verifies that the certificate matches the private key
-# doing this will save us having to wait for a timeout that would
-# otherwise occur.
-#
-# 1st param: path to the cert
-# 2nd param: path to the private key
-#
-verify_cert_matches_key()
-{
-    local cert_path=$1
-    local key_path=$2
-
-    wsrep_check_programs openssl diff
-
-    # generate the public key from the cert and the key
-    # they should match (otherwise we can't create an SSL connection)
-    if ! diff <(openssl x509 -in "$cert_path" -pubkey -noout) <(openssl rsa -in "$key_path" -pubout 2>/dev/null) >/dev/null 2>&1
-    then
-        wsrep_log_error "******** FATAL ERROR ************************* "
-        wsrep_log_error "* The certifcate and private key do not match. "
-        wsrep_log_error "* Please check your certificate and key files. "
-        wsrep_log_error "********************************************** "
-        exit 22
-    fi
-}
-
-# Checks to see if the file exists
-# If the file does not exist (or cannot be read), issues an error
-# and exits
-#
-# 1st param: file name to be checked (for read access)
-# 2nd param: 1st error message (header)
-# 3rd param: 2nd error message (footer, optional)
-#
-verify_file_exists()
-{
-    local file_path=$1
-    local error_message1=$2
-    local error_message2=$3
-
-    if ! [[ -r "$file_path" ]]; then
-        wsrep_log_error "******** FATAL ERROR ************************* "
-        wsrep_log_error "* $error_message1 "
-        wsrep_log_error "* Could not find/access : $file_path "
-
-        if ! [[ -z "$error_message2" ]]; then
-            wsrep_log_error "* $error_message2 "
-        fi
-
-        wsrep_log_error "********************************************** "
-        exit 22
-    fi
-}
-
-get_transfer()
-{
-    TSST_PORT=${WSREP_SST_OPT_PORT:-4444}
-
-    if [[ $tfmt == 'nc' ]];then
-        wsrep_check_programs nc
-
-        if [[ $encrypt -eq 2 || $encrypt -eq 3 || $encrypt -eq 4 ]]; then
-            wsrep_log_error "******** FATAL ERROR *********************** "
-            wsrep_log_error "* Using SSL encryption (encrypt= 2, 3, or 4) "
-            wsrep_log_error "* is not supported when using nc(netcat).    "
-            wsrep_log_error "******************************************** "
-            exit 22
-        fi
-
-        wsrep_log_info "Using netcat as streamer"
-        if [[ "$WSREP_SST_OPT_ROLE"  == "joiner" ]];then
-            if nc -h 2>&1 | grep -q ncat; then
-                # Ncat
-                tcmd="nc $sockopt -l ${TSST_PORT}"
-            elif nc -h 2>&1 | grep -q -- '-d\>';then
-                # Debian netcat
-                tcmd="nc $sockopt -dl ${TSST_PORT}"
-            else
-                # traditional netcat
-                tcmd="nc $sockopt -l -p ${TSST_PORT}"
-            fi
-        else
-            if nc -h 2>&1 | grep -q ncat;then
-                # Ncat
-                tcmd="nc ${WSREP_SST_OPT_HOST_UNESCAPED} ${TSST_PORT}"
-            elif nc -h 2>&1 | grep -q -- '-d\>';then
-                # Debian netcat
-                tcmd="nc ${WSREP_SST_OPT_HOST_UNESCAPED} ${TSST_PORT}"
-            else
-                # traditional netcat
-                tcmd="nc -q0 ${WSREP_SST_OPT_HOST_UNESCAPED} ${TSST_PORT}"
-            fi
-        fi
-    else
-        tfmt='socat'
-        wsrep_log_info "Using socat as streamer"
-        wsrep_check_programs socat
-
-        donor_extra=""
-        joiner_extra=""
-        if [[ $encrypt -eq 2 || $encrypt -eq 3 || $encrypt -eq 4 ]]; then
-            if ! socat -V | grep -q WITH_OPENSSL; then
-                wsrep_log_error "******** FATAL ERROR ****************** "
-                wsrep_log_error "* socat is not openssl enabled.         "
-                wsrep_log_error "* Unable to encrypt SST communications. "
-                wsrep_log_error "*************************************** "
-                exit 2
-            fi
-
-            # Determine the socat version
-            SOCAT_VERSION=`socat -V 2>&1 | grep -oe '[0-9]\.[0-9][\.0-9]*' | head -n1`
-            if [[ -z "$SOCAT_VERSION" ]]; then
-                wsrep_log_error "******** FATAL ERROR **************** "
-                wsrep_log_error "* Cannot determine the socat version. "
-                wsrep_log_error "************************************* "
-                exit 2
-            fi
-
-            # socat versions < 1.7.3 will have 512-bit dhparams (too small)
-            #       so create 2048-bit dhparams and send that as a parameter
-            # socat version >= 1.7.3, checks to see if the peername matches the hostname
-            #       set commonname="" to disable the peername checks
-            #
-            if ! check_for_version "$SOCAT_VERSION" "1.7.3"; then
-                if [[ "$WSREP_SST_OPT_ROLE"  == "joiner" ]]; then
-                    # dhparams check (will create ssl_dhparams if needed)
-                    check_for_dhparams
-                    joiner_extra=",dhparam=$ssl_dhparams"
-                fi
-            fi
-            if check_for_version "$SOCAT_VERSION" "1.7.3"; then
-                donor_extra=',commonname=""'
-            fi
-        fi
-
-        if [[ $encrypt -eq 2 ]]; then
-            wsrep_log_warning "**** WARNING **** encrypt=2 is deprecated and will be removed in a future release"
-            wsrep_log_info "Using openssl based encryption with socat: with crt and ca"
-
-            verify_file_exists "$tcert" "Both certificate and CA files are required." \
-                                        "Please check the 'tcert' option.           "
-            verify_file_exists "$tca" "Both certificate and CA files are required." \
-                                      "Please check the 'tca' option.             "
-
-            stagemsg+="-OpenSSL-Encrypted-2"
-            if [[ "$WSREP_SST_OPT_ROLE"  == "joiner" ]];then
-                wsrep_log_info "Decrypting with CERT: $tcert, CA: $tca"
-                tcmd="socat -u openssl-listen:${TSST_PORT},reuseaddr,cert=${tcert},cafile=${tca}${joiner_extra}${sockopt} stdio"
-            else
-                wsrep_log_info "Encrypting with CERT: $tcert, CA: $tca"
-                tcmd="socat -u stdio openssl-connect:${WSREP_SST_OPT_HOST}:${TSST_PORT},cert=${tcert},cafile=${tca}${donor_extra}${sockopt}"
-            fi
-        elif [[ $encrypt -eq 3 ]];then
-            wsrep_log_warning "**** WARNING **** encrypt=3 is deprecated and will be removed in a future release"
-            wsrep_log_info "Using openssl based encryption with socat: with key and crt"
-
-            verify_file_exists "$tcert" "Both certificate and key files are required." \
-                                        "Please check the 'tcert' option.            "
-            verify_file_exists "$tkey" "Both certificate and key files are required." \
-                                       "Please check the 'tkey' option.             "
-
-            stagemsg+="-OpenSSL-Encrypted-3"
-            if [[ "$WSREP_SST_OPT_ROLE"  == "joiner" ]];then
-                wsrep_log_info "Decrypting with CERT: $tcert, KEY: $tkey"
-                tcmd="socat -u openssl-listen:${TSST_PORT},reuseaddr,cert=${tcert},key=${tkey},verify=0${joiner_extra}${sockopt} stdio"
-            else
-                wsrep_log_info "Encrypting with CERT: $tcert, KEY: $tkey"
-                tcmd="socat -u stdio openssl-connect:${WSREP_SST_OPT_HOST}:${TSST_PORT},cert=${tcert},key=${tkey},verify=0${sockopt}"
-            fi
-        elif [[ $encrypt -eq 4 ]]; then
-            wsrep_log_info "Using openssl based encryption with socat: with key, crt, and ca"
-
-            verify_file_exists "$ssl_ca" "CA, certificate, and key files are required." \
-                                         "Please check the 'ssl-ca' option.           "
-            verify_file_exists "$ssl_cert" "CA, certificate, and key files are required." \
-                                           "Please check the 'ssl-cert' option.         "
-            verify_file_exists "$ssl_key" "CA, certificate, and key files are required." \
-                                          "Please check the 'ssl-key' option.          "
-
-            # Check to see that the key matches the cert
-            verify_cert_matches_key $ssl_cert $ssl_key
-
-            stagemsg+="-OpenSSL-Encrypted-4"
-            if [[ "$WSREP_SST_OPT_ROLE"  == "joiner" ]]; then
-                wsrep_log_info "Decrypting with CERT: $ssl_cert, KEY: $ssl_key, CA: $ssl_ca"
-                tcmd="socat -u openssl-listen:${TSST_PORT},reuseaddr,cert=${ssl_cert},key=${ssl_key},cafile=${ssl_ca},verify=1${joiner_extra}${sockopt} stdio"
-            else
-                wsrep_log_info "Encrypting with CERT: $ssl_cert, KEY: $ssl_key, CA: $ssl_ca"
-                tcmd="socat -u stdio openssl-connect:${WSREP_SST_OPT_HOST}:${TSST_PORT},cert=${ssl_cert},key=${ssl_key},cafile=${ssl_ca},verify=1${donor_extra}${sockopt}"
-            fi
-
-        else
-            if [[ $encrypt -eq 1 ]]; then
-                wsrep_log_warning "**** WARNING **** encrypt=1 is deprecated and will be removed in a future release"
-            fi
-
-            if [[ "$WSREP_SST_OPT_ROLE"  == "joiner" ]]; then
-                tcmd="socat -u TCP-LISTEN:${TSST_PORT},reuseaddr${sockopt} stdio"
-            else
-                tcmd="socat -u stdio TCP:${WSREP_SST_OPT_HOST}:${TSST_PORT}${sockopt}"
-            fi
-        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 $MY_PRINT_DEFAULTS xtrabackup | grep -q -- "--compress";then 
-        # QuickLZ has around 50% compression ratio
-        # When compression/compaction used, the progress is only an approximate.
-        payload=$(( payload*1/2 ))
-    fi
-    popd 1>/dev/null
-    pcmd+=" -s $payload"
-    adjust_progress
-}
-
-adjust_progress()
-{
-
-    if ! command -v pv >/dev/null;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 && $progress != '1' ]];then 
-        if [[ -e $progress ]];then 
-            pcmd+=" 2>>$progress"
-        else 
-            pcmd+=" 2>$progress"
-        fi
-    elif [[ -z $progress && -n $rlimit  ]];then 
-            # When rlimit is non-zero
-            pcmd="pv -q"
-    fi 
-
-    if [[ -n $rlimit && "$WSREP_SST_OPT_ROLE"  == "donor" ]];then
-        wsrep_log_info "Rate-limiting SST to $rlimit"
-        pcmd+=" -L \$rlimit"
-    fi
-}
-
-read_cnf()
-{
-    sfmt=$(parse_cnf sst streamfmt "xbstream")
-    tfmt=$(parse_cnf sst transferfmt "socat")
-    tca=$(parse_cnf sst tca "")
-    tcert=$(parse_cnf sst tcert "")
-    tkey=$(parse_cnf sst tkey "")
-    encrypt=$(parse_cnf sst encrypt 0)
-    sockopt=$(parse_cnf sst sockopt "")
-    progress=$(parse_cnf sst progress "")
-    rebuild=$(parse_cnf sst rebuild 0)
-    ttime=$(parse_cnf sst time 0)
-    if [ "${OS}" = "FreeBSD" ]; then
-        cpat=$(parse_cnf sst cpat '.*\.pem$|.*init\.ok$|.*galera\.cache$|.*sst_in_progress$|.*\.sst$|.*gvwstate\.dat$|.*grastate\.dat$|.*\.err$|.*\.log$|.*RPM_UPGRADE_MARKER$|.*RPM_UPGRADE_HISTORY$')
-    else
-        cpat=$(parse_cnf sst cpat '.*\.pem$\|.*init\.ok$\|.*galera\.cache$\|.*sst_in_progress$\|.*\.sst$\|.*gvwstate\.dat$\|.*grastate\.dat$\|.*\.err$\|.*\.log$\|.*RPM_UPGRADE_MARKER$\|.*RPM_UPGRADE_HISTORY$')
-    fi
-    ealgo=$(parse_cnf xtrabackup encrypt "")
-    ekey=$(parse_cnf xtrabackup encrypt-key "")
-    ekeyfile=$(parse_cnf xtrabackup encrypt-key-file "")
-    scomp=$(parse_cnf sst compressor "")
-    sdecomp=$(parse_cnf sst decompressor "")
-
-
-    # Refer to http://www.percona.com/doc/percona-xtradb-cluster/manual/xtrabackup_sst.html 
-    if [[ -z $ealgo ]];then
-        ealgo=$(parse_cnf sst encrypt-algo "")
-        ekey=$(parse_cnf sst encrypt-key "")
-        ekeyfile=$(parse_cnf sst encrypt-key-file "")
-    fi
-
-    # Pull the parameters needed for encrypt=4
-    ssl_ca=$(parse_cnf sst ssl-ca "")
-    if [[ -z "$ssl_ca" ]]; then
-        ssl_ca=$(parse_cnf --mysqld ssl-ca "")
-    fi
-    ssl_cert=$(parse_cnf sst ssl-cert "")
-    if [[ -z "$ssl_cert" ]]; then
-        ssl_cert=$(parse_cnf --mysqld ssl-cert "")
-    fi
-    ssl_key=$(parse_cnf sst ssl-key "")
-    if [[ -z "$ssl_key" ]]; then
-        ssl_key=$(parse_cnf --mysqld ssl-key "")
-    fi
-
-    rlimit=$(parse_cnf sst rlimit "")
-    uextra=$(parse_cnf sst use-extra 0)
-    iopts=$(parse_cnf sst inno-backup-opts "")
-    iapts=$(parse_cnf sst inno-apply-opts "")
-    impts=$(parse_cnf sst inno-move-opts "")
-    stimeout=$(parse_cnf sst sst-initial-timeout 100)
-    ssyslog=$(parse_cnf sst sst-syslog 0)
-    ssystag=$(parse_cnf mysqld_safe syslog-tag "${SST_SYSLOG_TAG:-}")
-    ssystag+="-"
-
-    if [[ $ssyslog -ne -1 ]];then 
-        if $MY_PRINT_DEFAULTS mysqld_safe | grep -q -- "--syslog";then
-            ssyslog=1
-        fi
-    fi
-}
-
-get_stream()
-{
-    if [[ $sfmt == 'xbstream' ]];then 
-        wsrep_log_info "Streaming with xbstream"
-        if [[ "$WSREP_SST_OPT_ROLE"  == "joiner" ]];then
-            strmcmd="xbstream -x"
-        else
-            strmcmd="xbstream -c \${INFO_FILE}"
-        fi
-    else
-        sfmt="tar"
-        wsrep_log_info "Streaming with tar"
-        if [[ "$WSREP_SST_OPT_ROLE"  == "joiner" ]];then
-            strmcmd="tar xfi - "
-        else
-            strmcmd="tar cf - \${INFO_FILE} "
-        fi
-
-    fi
-}
-
-get_proc()
-{
-    set +e
-    nproc=$(grep -c processor /proc/cpuinfo)
-    [[ -z $nproc || $nproc -eq 0 ]] && nproc=1
-    set -e
-}
-
-sig_joiner_cleanup()
-{
-    wsrep_log_error "Removing $MAGIC_FILE file due to signal"
-    rm -f "$MAGIC_FILE"
-}
-
-cleanup_joiner()
-{
-    # Since this is invoked just after exit NNN
-    local estatus=$?
-    if [[ $estatus -ne 0 ]];then 
-        wsrep_log_error "Cleanup after exit with status:$estatus"
-    elif [ "${WSREP_SST_OPT_ROLE}" = "joiner" ];then
-        wsrep_log_info "Removing the sst_in_progress file"
-        wsrep_cleanup_progress_file
-    fi
-    if [[ -n $progress && -p $progress ]];then 
-        wsrep_log_info "Cleaning up fifo file $progress"
-        rm $progress
-    fi
-    if [[ -n ${STATDIR:-} ]];then 
-       [[ -d $STATDIR ]] && rm -rf $STATDIR
-    fi
-
-    # Final cleanup 
-    pgid=$(ps -o pgid= $$ | grep -o '[0-9]*')
-
-    # This means no setsid done in mysqld.
-    # We don't want to kill mysqld here otherwise.
-    if [[ $$ -eq $pgid ]];then
-
-        # This means a signal was delivered to the process.
-        # So, more cleanup. 
-        if [[ $estatus -ge 128 ]];then 
-            kill -KILL -$$ || true
-        fi
-
-    fi
-
-    exit $estatus
-}
-
-check_pid()
-{
-    local pid_file="$1"
-    [ -r "$pid_file" ] && ps -p $(cat "$pid_file") >/dev/null 2>&1
-}
-
-cleanup_donor()
-{
-    # Since this is invoked just after exit NNN
-    local estatus=$?
-    if [[ $estatus -ne 0 ]];then 
-        wsrep_log_error "Cleanup after exit with status:$estatus"
-    fi
-
-    if [[ -n ${XTRABACKUP_PID:-} ]];then 
-        if check_pid $XTRABACKUP_PID
-        then
-            wsrep_log_error "xtrabackup process is still running. Killing... "
-            kill_xtrabackup
-        fi
-
-    fi
-    rm -f ${DATA}/${IST_FILE} || true
-
-    if [[ -n $progress && -p $progress ]];then 
-        wsrep_log_info "Cleaning up fifo file $progress"
-        rm -f $progress || true
-    fi
-
-    wsrep_log_info "Cleaning up temporary directories"
-
-    if [[ -n $xtmpdir ]];then 
-       [[ -d $xtmpdir ]] &&  rm -rf $xtmpdir || true
-    fi
-
-    if [[ -n $itmpdir ]];then 
-       [[ -d $itmpdir ]] &&  rm -rf $itmpdir || true
-    fi
-
-    # Final cleanup 
-    pgid=$(ps -o pgid= $$ | grep -o '[0-9]*')
-
-    # This means no setsid done in mysqld.
-    # We don't want to kill mysqld here otherwise.
-    if [[ $$ -eq $pgid ]];then
-
-        # This means a signal was delivered to the process.
-        # So, more cleanup. 
-        if [[ $estatus -ge 128 ]];then 
-            kill -KILL -$$ || true
-        fi
-
-    fi
-
-    exit $estatus
-
-}
-
-kill_xtrabackup()
-{
-    local PID=$(cat $XTRABACKUP_PID)
-    [ -n "$PID" -a "0" != "$PID" ] && kill $PID && (kill $PID && kill -9 $PID) || :
-    wsrep_log_info "Removing xtrabackup pid file $XTRABACKUP_PID"
-    rm -f "$XTRABACKUP_PID" || true
-}
-
-# waits ~1 minute for nc/socat to open the port and then reports ready
-# (regardless of timeout)
-wait_for_listen()
-{
-    local HOST=$1
-    local PORT=$2
-    local MODULE=$3
-    local LSOF_OUT
-
-    for i in {1..300}
-    do
-        LSOF_OUT=$(lsof -sTCP:LISTEN -i TCP:${PORT} -a -c nc -c socat -F c 2> /dev/null || :)
-        [ -n "${LSOF_OUT}" ] && break
-        sleep 0.2
-    done
-
-    echo "ready ${HOST}:${PORT}/${MODULE}//${WSREP_SST_OPT_SST_VER:-1}"
-}
-
-check_extra()
-{
-    local use_socket=1
-    if [[ $uextra -eq 1 ]];then 
-        if [ $(parse_cnf --mysqld thread-handling) = 'pool-of-threads'];then
-            local eport=$(parse_cnf --mysqld extra-port)
-            if [[ -n $eport ]];then 
-                # Xtrabackup works only locally.
-                # Hence, setting host to 127.0.0.1 unconditionally. 
-                wsrep_log_info "SST through extra_port $eport"
-                INNOEXTRA+=" --host=127.0.0.1 --port=$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 [[ $use_socket -eq 1 ]] && [[ -n "${WSREP_SST_OPT_SOCKET}" ]];then
-        INNOEXTRA+=" --socket=${WSREP_SST_OPT_SOCKET}"
-    fi
-}
-
-recv_joiner()
-{
-    local dir=$1
-    local msg=$2 
-    local tmt=$3
-    local checkf=$4
-    local ltcmd
-
-    if [[ ! -d ${dir} ]];then
-        # This indicates that IST is in progress
-        return
-    fi
-
-    pushd ${dir} 1>/dev/null
-    set +e
-
-    if [[ $tmt -gt 0 ]] && command -v timeout >/dev/null;then
-        if timeout --help | grep -q -- '-k';then 
-            ltcmd="timeout -k $(( tmt+10 )) $tmt $tcmd"
-        else 
-            ltcmd="timeout -s9 $tmt $tcmd"
-        fi
-        timeit "$msg" "$ltcmd | $strmcmd; RC=( "\${PIPESTATUS[@]}" )"
-    else 
-        timeit "$msg" "$tcmd | $strmcmd; RC=( "\${PIPESTATUS[@]}" )"
-    fi
-
-    set -e
-    popd 1>/dev/null 
-
-    if [[ ${RC[0]} -eq 124 ]];then 
-        wsrep_log_error "Possible timeout in receving first data from donor in gtid stage"
-        exit 32
-    fi
-
-    for ecode in "${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 [[ $checkf -eq 1 && ! -r "${MAGIC_FILE}" ]];then
-        # this message should cause joiner to abort
-        wsrep_log_error "xtrabackup process ended without creating '${MAGIC_FILE}'"
-        wsrep_log_info "Contents of datadir" 
-        wsrep_log_info "$(ls -l ${dir}/*)"
-        exit 32
-    fi
-}
-
-
-send_donor()
-{
-    local dir=$1
-    local msg=$2 
-
-    pushd ${dir} 1>/dev/null
-    set +e
-    timeit "$msg" "$strmcmd | $tcmd; RC=( "\${PIPESTATUS[@]}" )"
-    set -e
-    popd 1>/dev/null 
-
-
-    for ecode in "${RC[@]}";do 
-        if [[ $ecode -ne 0 ]];then 
-            wsrep_log_error "Error while getting data from donor node: " \
-                            "exit codes: ${RC[@]}"
-            exit 32
-        fi
-    done
-
-}
-
-# Returns the version string in a standardized format
-# Input "1.2.3" => echoes "010203"
-# Wrongly formatted values => echoes "000000"
-normalize_version()
-{
-    local major=0
-    local minor=0
-    local patch=0
-
-    # Only parses purely numeric version numbers, 1.2.3 
-    # Everything after the first three values are ignored
-    if [[ $1 =~ ^([0-9]+)\.([0-9]+)\.?([0-9]*)([\.0-9])*$ ]]; then
-        major=${BASH_REMATCH[1]}
-        minor=${BASH_REMATCH[2]}
-        patch=${BASH_REMATCH[3]}
-    fi
-
-    printf %02d%02d%02d $major $minor $patch
-}
-
-# Compares two version strings
-# The first parameter is the version to be checked
-# The second parameter is the minimum version required
-# Returns 1 (failure) if $1 >= $2, 0 (success) otherwise
-check_for_version()
-{
-    local local_version_str="$( normalize_version $1 )"
-    local required_version_str="$( normalize_version $2 )"
-
-    if [[ "$local_version_str" < "$required_version_str" ]]; then
-        return 1
-    else
-        return 0
-    fi
-}
-
-monitor_process()
-{
-    local sst_stream_pid=$1
-
-    while true ; do
-
-        if ! ps --pid "${WSREP_SST_OPT_PARENT}" &>/dev/null; then
-            wsrep_log_error "Parent mysqld process (PID:${WSREP_SST_OPT_PARENT}) terminated unexpectedly." 
-            kill -- -"${WSREP_SST_OPT_PARENT}"
-            exit 32
-        fi
-
-        if ! ps --pid "${sst_stream_pid}" &>/dev/null; then 
-            break
-        fi
-
-        sleep 0.1
-
-    done
-}
-
-
-wsrep_check_programs "$INNOBACKUPEX_BIN"
-
-# check the version, we require XB-2.4 to ensure that we can pass the
-# datadir via the command-line option
-XB_REQUIRED_VERSION="2.3.5"
-
-XB_VERSION=`$INNOBACKUPEX_BIN --version 2>&1 | grep -oe '[0-9]\.[0-9][\.0-9]*' | head -n1`
-if [[ -z $XB_VERSION ]]; then
-    wsrep_log_error "FATAL: Cannot determine the $INNOBACKUPEX_BIN version. Needs xtrabackup-$XB_REQUIRED_VERSION or higher to perform SST"
-    exit 2
-fi
-
-if ! check_for_version $XB_VERSION $XB_REQUIRED_VERSION; then
-    wsrep_log_error "FATAL: The $INNOBACKUPEX_BIN version is $XB_VERSION. Needs xtrabackup-$XB_REQUIRED_VERSION or higher to perform SST"
-    exit 2
-fi
-
-
-rm -f "${MAGIC_FILE}"
-
-if [[ ! ${WSREP_SST_OPT_ROLE} == 'joiner' && ! ${WSREP_SST_OPT_ROLE} == 'donor' ]];then 
-    wsrep_log_error "Invalid role ${WSREP_SST_OPT_ROLE}"
-    exit 22
-fi
-
-read_cnf
-
-if ${INNOBACKUPEX_BIN} /tmp --help 2>/dev/null | grep -q -- '--version-check'; then 
-    disver="--no-version-check"
-fi
-
-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 "
-fi
-
-
-INNOEXTRA=""
-
-if [[ $ssyslog -eq 1 ]];then 
-
-    if ! command -v logger >/dev/null;then
-        wsrep_log_error "logger not in path: $PATH. Ignoring"
-    else
-
-        wsrep_log_info "Logging all stderr of SST/Innobackupex 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 "$@" 
-        }
-
-        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 ${ssystag}innobackupex-backup)"
-    fi
-
-else 
-    INNOAPPLY="&>\${DATA}/innobackup.prepare.log"
-    INNOMOVE="&>\${DATA}/innobackup.move.log"
-    INNOBACKUP="2>\${DATA}/innobackup.backup.log"
-fi
-
-get_stream
-get_transfer
-
-INNODB_DATA_HOME_DIR=${INNODB_DATA_HOME_DIR:-""}
-# Try to set INNODB_DATA_HOME_DIR from the command line:
-if [ ! -z "$INNODB_DATA_HOME_DIR_ARG" ]; then
-    INNODB_DATA_HOME_DIR=$INNODB_DATA_HOME_DIR_ARG
-fi
-# if INNODB_DATA_HOME_DIR env. variable is not set, try to get it from my.cnf
-if [ -z "$INNODB_DATA_HOME_DIR" ]; then
-    INNODB_DATA_HOME_DIR=$(parse_cnf mysqld$WSREP_SST_OPT_SUFFIX_VALUE innodb-data-home-dir '')
-fi
-if [ -z "$INNODB_DATA_HOME_DIR" ]; then
-    INNODB_DATA_HOME_DIR=$(parse_cnf --mysqld innodb-data-home-dir "")
-fi
-if [ ! -z "$INNODB_DATA_HOME_DIR" ]; then
-   INNOEXTRA+=" --innodb-data-home-dir=$INNODB_DATA_HOME_DIR"
-fi
-
-if [ -n "$INNODB_DATA_HOME_DIR" ]; then
-    # handle both relative and absolute paths
-    INNODB_DATA_HOME_DIR=$(cd $DATA; mkdir -p "$INNODB_DATA_HOME_DIR"; cd $INNODB_DATA_HOME_DIR; pwd -P)
-else
-    # default to datadir
-    INNODB_DATA_HOME_DIR=$(cd $DATA; pwd -P)
-fi
-
-INNOAPPLY="${INNOBACKUPEX_BIN} $disver $iapts \$INNOEXTRA --apply-log \$rebuildcmd \${DATA} ${INNOAPPLY}"
-INNOMOVE="${INNOBACKUPEX_BIN} ${WSREP_SST_OPT_CONF} $disver $impts  --move-back --force-non-empty-directories \${DATA} ${INNOMOVE}"
-INNOBACKUP="${INNOBACKUPEX_BIN} ${WSREP_SST_OPT_CONF} $disver $iopts \$tmpopts \$INNOEXTRA --galera-info --stream=\$sfmt \$itmpdir ${INNOBACKUP}"
-
-if [ "$WSREP_SST_OPT_ROLE" = "donor" ]
-then
-    trap cleanup_donor EXIT
-
-    if [ $WSREP_SST_OPT_BYPASS -eq 0 ]
-    then
-        usrst=0
-        if [[ -z $WSREP_SST_OPT_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
-
-        if [[ -z $(parse_cnf --mysqld tmpdir "") && -z $(parse_cnf xtrabackup tmpdir "") ]];then 
-            xtmpdir=$(mktemp -d)
-            tmpopts=" --tmpdir=$xtmpdir "
-            wsrep_log_info "Using $xtmpdir as xtrabackup temporary directory"
-        fi
-
-        itmpdir=$(mktemp -d)
-        wsrep_log_info "Using $itmpdir as innobackupex temporary directory"
-
-        if [[ -n "${WSREP_SST_OPT_USER:-}" && "$WSREP_SST_OPT_USER" != "(null)" ]]; then
-           INNOEXTRA+=" --user=$WSREP_SST_OPT_USER"
-           usrst=1
-        fi
-
-        if [ -n "${WSREP_SST_OPT_PSWD:-}" ]; then
-           INNOEXTRA+=" --password=$WSREP_SST_OPT_PSWD"
-        elif [[ $usrst -eq 1 ]];then
-           # Empty password, used for testing, debugging etc.
-           INNOEXTRA+=" --password="
-        fi
-
-        get_keys
-        check_extra
-
-        wsrep_log_info "Streaming GTID file before SST"
-
-        # Store donor's wsrep GTID (state ID) and wsrep_gtid_domain_id
-        # (separated by a space).
-        echo "${WSREP_SST_OPT_GTID} ${WSREP_SST_OPT_GTID_DOMAIN_ID}" > "${MAGIC_FILE}"
-
-        ttcmd="$tcmd"
-
-        if [[ $encrypt -eq 1 ]];then
-            if [[ -n $scomp ]];then 
-                tcmd=" \$ecmd | $scomp | $tcmd "
-            else 
-                tcmd=" \$ecmd | $tcmd "
-            fi
-        elif [[ -n $scomp ]];then 
-            tcmd=" $scomp | $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 ${WSREP_SST_OPT_HOST} ${WSREP_SST_OPT_PORT:-4444}"
-
-        # 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 | $tcmd "
-        fi
-
-        set +e
-        timeit "${stagemsg}-SST" "$INNOBACKUP | $tcmd; RC=( "\${PIPESTATUS[@]}" )"
-        set -e
-
-        if [ ${RC[0]} -ne 0 ]; then
-          wsrep_log_error "${INNOBACKUPEX_BIN} finished with error: ${RC[0]}. " \
-                          "Check ${DATA}/innobackup.backup.log"
-          exit 22
-        elif [[ ${RC[$(( ${#RC[@]}-1 ))]} -eq 1 ]];then 
-          wsrep_log_error "$tcmd finished with error: ${RC[1]}"
-          exit 22
-        fi
-
-        # innobackupex implicitly writes PID to fixed location in $xtmpdir
-        XTRABACKUP_PID="$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}"
-        get_keys
-        if [[ $encrypt -eq 1 ]];then
-            if [[ -n $scomp ]];then 
-                tcmd=" \$ecmd | $scomp | $tcmd "
-            else
-                tcmd=" \$ecmd | $tcmd "
-            fi
-        elif [[ -n $scomp ]];then 
-            tcmd=" $scomp | $tcmd "
-        fi
-        strmcmd+=" \${IST_FILE}"
-
-        send_donor $DATA "${stagemsg}-IST"
-
-    fi
-
-    echo "done ${WSREP_SST_OPT_GTID}"
-    wsrep_log_info "Total time on donor: $totime seconds"
-
-elif [ "${WSREP_SST_OPT_ROLE}" = "joiner" ]
-then
-    [[ -e $SST_PROGRESS_FILE ]] && wsrep_log_info "Stale sst_in_progress file: $SST_PROGRESS_FILE"
-    [[ -n $SST_PROGRESS_FILE ]] && touch $SST_PROGRESS_FILE
-
-    ib_home_dir=$INNODB_DATA_HOME_DIR
-    ib_log_dir=$(parse_cnf --mysqld innodb-log-group-home-dir "")
-    ib_undo_dir=$(parse_cnf --mysqld innodb-undo-directory "")
-
-    stagemsg="Joiner-Recv"
-
-    sencrypted=1
-    nthreads=1
-
-    MODULE="xtrabackup_sst"
-
-    rm -f "${DATA}/${IST_FILE}"
-
-    # May need xtrabackup_checkpoints later on
-    rm -f ${DATA}/xtrabackup_binary ${DATA}/xtrabackup_galera_info  ${DATA}/xtrabackup_logfile
-
-    wait_for_listen ${WSREP_SST_OPT_HOST} ${WSREP_SST_OPT_PORT:-4444} ${MODULE} &
-
-    trap sig_joiner_cleanup HUP PIPE INT TERM
-    trap cleanup_joiner EXIT
-
-    if [[ -n $progress ]];then 
-        adjust_progress
-        tcmd+=" | $pcmd"
-    fi
-
-    get_keys
-    if [[ $encrypt -eq 1 && $sencrypted -eq 1 ]];then
-        if [[ -n $sdecomp ]];then 
-            strmcmd=" $sdecomp | \$ecmd | $strmcmd"
-        else 
-            strmcmd=" \$ecmd | $strmcmd"
-        fi
-    elif [[ -n $sdecomp ]];then 
-            strmcmd=" $sdecomp | $strmcmd"
-    fi
-
-    STATDIR=$(mktemp -d)
-    MAGIC_FILE="${STATDIR}/${INFO_FILE}"
-    recv_joiner $STATDIR  "${stagemsg}-gtid" $stimeout 1
-
-
-    if ! ps -p ${WSREP_SST_OPT_PARENT} &>/dev/null
-    then
-        wsrep_log_error "Parent mysqld process (PID:${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) &
-        jpid=$!
-        wsrep_log_info "Proceeding with SST"
-
-
-        wsrep_log_info "Cleaning the existing datadir and innodb-data/log directories"
-        if [ "${OS}" = "FreeBSD" ]; then
-            find -E $ib_home_dir $ib_log_dir $ib_undo_dir $DATA -mindepth 1 -prune -regex $cpat -o -exec rm -rfv {} 1>&2 \+
-        else
-            find $ib_home_dir $ib_log_dir $ib_undo_dir $DATA -mindepth 1 -prune -regex $cpat -o -exec rm -rfv {} 1>&2 \+
-        fi
-
-        tempdir=$(parse_cnf --mysqld log-bin "")
-        if [[ -n ${tempdir:-} ]];then
-            binlog_dir=$(dirname $tempdir)
-            binlog_file=$(basename $tempdir)
-            if [[ -n ${binlog_dir:-} && $binlog_dir != '.' && $binlog_dir != $DATA ]];then
-                pattern="$binlog_dir/$binlog_file\.[0-9]+$"
-                wsrep_log_info "Cleaning the binlog directory $binlog_dir as well"
-                find $binlog_dir -maxdepth 1 -type f -regex $pattern -exec rm -fv {} 1>&2 \+ || true
-                rm $binlog_dir/*.index || true
-            fi
-        fi
-
-
-
-        TDATA=${DATA}
-        DATA="${DATA}/.sst"
-
-
-        MAGIC_FILE="${DATA}/${INFO_FILE}"
-        wsrep_log_info "Waiting for SST streaming to complete!"
-        monitor_process $jpid
-
-        get_proc
-
-        if [[ ! -s ${DATA}/xtrabackup_checkpoints ]];then 
-            wsrep_log_error "xtrabackup_checkpoints missing, failed innobackupex/SST on donor"
-            exit 2
-        fi
-
-        # Rebuild indexes for compact backups
-        if grep -q 'compact = 1' ${DATA}/xtrabackup_checkpoints;then 
-            wsrep_log_info "Index compaction detected"
-            rebuild=1
-        fi
-
-        if [[ $rebuild -eq 1 ]];then 
-            nthreads=$(parse_cnf xtrabackup rebuild-threads $nproc)
-            wsrep_log_info "Rebuilding during prepare with $nthreads threads"
-            rebuildcmd="--rebuild-indexes --rebuild-threads=$nthreads"
-        fi
-
-        if test -n "$(find ${DATA} -maxdepth 1 -type f -name '*.qp' -print -quit)";then
-
-            wsrep_log_info "Compressed qpress files found"
-
-            if ! command -v qpress >/dev/null;then
-                wsrep_log_error "qpress not found in path: $PATH"
-                exit 22
-            fi
-
-            if [[ -n $progress ]] && pv --help | grep -q 'line-mode';then
-                count=$(find ${DATA} -type f -name '*.qp' | wc -l)
-                count=$(( count*2 ))
-                if pv --help | grep -q FORMAT;then 
-                    pvopts="-f -s $count -l -N Decompression -F '%N => Rate:%r Elapsed:%t %e Progress: [%b/$count]'"
-                else 
-                    pvopts="-f -s $count -l -N Decompression"
-                fi
-                pcmd="pv $pvopts"
-                adjust_progress
-                dcmd="$pcmd | xargs -n 2 qpress -T${nproc}d"
-            else 
-                dcmd="xargs -n 2 qpress -T${nproc}d"
-            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
-
-
-        if  [[ ! -z $WSREP_SST_OPT_BINLOG ]];then
-
-            BINLOG_DIRNAME=$(dirname $WSREP_SST_OPT_BINLOG)
-            BINLOG_FILENAME=$(basename $WSREP_SST_OPT_BINLOG)
-
-            # To avoid comparing data directory and BINLOG_DIRNAME 
-            mv $DATA/${BINLOG_FILENAME}.* $BINLOG_DIRNAME/ 2>/dev/null || true
-
-            pushd $BINLOG_DIRNAME &>/dev/null
-            for bfiles in $(ls -1 ${BINLOG_FILENAME}.[0-9]*);do
-                echo ${BINLOG_DIRNAME}/${bfiles} >> ${BINLOG_FILENAME}.index
-            done
-            popd &> /dev/null
-
-        fi
-
-        wsrep_log_info "Preparing the backup at ${DATA}"
-        timeit "Xtrabackup prepare stage" "$INNOAPPLY"
-
-        if [ $? -ne 0 ];
-        then
-            wsrep_log_error "${INNOBACKUPEX_BIN} apply finished with errors. Check ${DATA}/innobackup.prepare.log" 
-            exit 22
-        fi
-
-        MAGIC_FILE="${TDATA}/${INFO_FILE}"
-        set +e
-        rm $TDATA/innobackup.prepare.log $TDATA/innobackup.move.log
-        set -e
-        wsrep_log_info "Moving the backup to ${TDATA}"
-        timeit "Xtrabackup move stage" "$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 ${DATA}/innobackup.move.log for details"
-            exit 22
-        fi
-
-
-    else 
-        wsrep_log_info "${IST_FILE} received from donor: Running IST"
-    fi
-
-    if [[ ! -r ${MAGIC_FILE} ]];then 
-        wsrep_log_error "SST magic file ${MAGIC_FILE} not found/readable"
-        exit 2
-    fi
-    wsrep_log_info "Galera co-ords from recovery: $(cat ${MAGIC_FILE})"
-    cat "${MAGIC_FILE}" # Output : UUID:seqno wsrep_gtid_domain_id
-    wsrep_log_info "Total time on joiner: $totime seconds"
-fi
-
-exit 0
diff --git a/scripts/wsrep_sst_xtrabackup.sh b/scripts/wsrep_sst_xtrabackup.sh
deleted file mode 100644
index 41ed4485de5..00000000000
--- a/scripts/wsrep_sst_xtrabackup.sh
+++ /dev/null
@@ -1,692 +0,0 @@
-#!/bin/bash -ue
-# 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  02110-1301  USA.
-
-# Optional dependencies and options documented here: http://www.percona.com/doc/percona-xtradb-cluster/manual/xtrabackup_sst.html 
-# Make sure to read that before proceeding!
-
-
-
-
-. $(dirname $0)/wsrep_sst_common
-
-ealgo=""
-ekey=""
-ekeyfile=""
-encrypt=0
-nproc=1
-ecode=0
-XTRABACKUP_PID=""
-tcert=""
-tpem=""
-sockopt=""
-progress=""
-ttime=0
-totime=0
-lsn="${WSREP_SST_OPT_LSN}"
-incremental=0
-ecmd=""
-rlimit=""
-
-sfmt="tar"
-strmcmd=""
-tfmt=""
-tcmd=""
-rebuild=0
-rebuildcmd=""
-payload=0
-pvformat="-F '%N => Rate:%r Avg:%a Elapsed:%t %e Bytes: %b %p' "
-pvopts="-f  -i 10 -N $WSREP_SST_OPT_ROLE "
-uextra=0
-
-if pv --help 2>/dev/null | grep -q FORMAT;then
-    pvopts+=$pvformat
-fi
-pcmd="pv $pvopts"
-declare -a RC
-
-INNOBACKUPEX_BIN=innobackupex
-DATA="${WSREP_SST_OPT_DATA}"
-INFO_FILE="xtrabackup_galera_info"
-IST_FILE="xtrabackup_ist"
-MAGIC_FILE="${DATA}/${INFO_FILE}"
-
-# Setting the path for ss and ip
-export PATH="/usr/sbin:/sbin:$PATH"
-
-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()
-{
-    if [[ $encrypt -eq 2 ]];then 
-        return 
-    fi
-
-    if [[ $encrypt -eq 0 ]];then 
-        if $MY_PRINT_DEFAULTS xtrabackup | grep -q encrypt;then
-            wsrep_log_error "Unexpected option combination. SST may fail. Refer to http://www.percona.com/doc/percona-xtradb-cluster/manual/xtrabackup_sst.html "
-        fi
-        return
-    fi
-
-    if [[ $sfmt == 'tar' ]];then
-        wsrep_log_info "NOTE: Xtrabackup-based encryption - encrypt=1 - cannot be enabled with tar format"
-        encrypt=0
-        return
-    fi
-
-    wsrep_log_info "Xtrabackup based encryption enabled in my.cnf - Supported only from Xtrabackup 2.1.4"
-
-    if [[ -z $ealgo ]];then
-        wsrep_log_error "FATAL: Encryption algorithm empty from my.cnf, bailing out"
-        exit 3
-    fi
-
-    if [[ -z $ekey && ! -r $ekeyfile ]];then
-        wsrep_log_error "FATAL: Either key or keyfile must be readable"
-        exit 3
-    fi
-
-    if [[ -z $ekey ]];then
-        ecmd="xbcrypt --encrypt-algo=$ealgo --encrypt-key-file=$ekeyfile"
-    else
-        ecmd="xbcrypt --encrypt-algo=$ealgo --encrypt-key=$ekey"
-    fi
-
-    if [[ "$WSREP_SST_OPT_ROLE" == "joiner" ]];then
-        ecmd+=" -d"
-    fi
-}
-
-get_transfer()
-{
-    TSST_PORT=${WSREP_SST_OPT_PORT:-4444}
-
-    if [[ $tfmt == 'nc' ]];then
-        wsrep_check_programs nc
-        wsrep_log_info "Using netcat as streamer"
-        if [[ "$WSREP_SST_OPT_ROLE"  == "joiner" ]];then
-            if nc -h 2>&1 | grep -q ncat;then 
-                # Ncat
-                tcmd="nc -l ${TSST_PORT}"
-            elif nc -h 2>&1 | grep -q -- '-d\>';then
-                # Debian netcat
-                tcmd="nc -dl ${TSST_PORT}"
-            else
-                # traditional netcat
-                tcmd="nc -l -p ${TSST_PORT}"
-            fi
-        else
-            if nc -h 2>&1 | grep -q ncat;then
-                # Ncat
-                tcmd="nc ${REMOTEIP} ${TSST_PORT}"
-            elif nc -h 2>&1 | grep -q -- '-d\>';then
-                # Debian netcat
-                tcmd="nc ${REMOTEIP} ${TSST_PORT}"
-            else
-                # traditional netcat
-                tcmd="nc -q0 ${REMOTEIP} ${TSST_PORT}"
-            fi
-        fi
-    else
-        tfmt='socat'
-        wsrep_check_programs socat
-        wsrep_log_info "Using socat as streamer"
-
-        if [[ $encrypt -eq 2 ]] && ! socat -V | grep -q OPENSSL;then 
-            wsrep_log_info "NOTE: socat is not openssl enabled, falling back to plain transfer"
-            encrypt=0
-        fi
-
-        if [[ $encrypt -eq 2 ]];then 
-            wsrep_log_info "Using openssl based encryption with socat"
-            if [[ -z $tpem || -z $tcert ]];then 
-                wsrep_log_error "Both PEM and CRT files required"
-                exit 22
-            fi
-            if [[ "$WSREP_SST_OPT_ROLE"  == "joiner" ]];then
-                wsrep_log_info "Decrypting with PEM $tpem, CA: $tcert"
-                tcmd="socat -u openssl-listen:${TSST_PORT},reuseaddr,cert=$tpem,cafile=${tcert}${sockopt} stdio"
-            else
-                wsrep_log_info "Encrypting with PEM $tpem, CA: $tcert"
-                tcmd="socat -u stdio openssl-connect:${WSREP_SST_OPT_HOST}:${TSST_PORT},cert=$tpem,cafile=${tcert}${sockopt}"
-            fi
-        else 
-            if [[ "$WSREP_SST_OPT_ROLE"  == "joiner" ]];then
-                tcmd="socat -u TCP-LISTEN:${TSST_PORT},reuseaddr${sockopt} stdio"
-            else
-                tcmd="socat -u stdio TCP:${WSREP_SST_OPT_HOST}:${TSST_PORT}${sockopt}"
-            fi
-        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 $MY_PRINT_DEFAULTS xtrabackup | grep -q -- "--compress";then 
-        # QuickLZ has around 50% compression ratio
-        # When compression/compaction used, the progress is only an approximate.
-        payload=$(( payload*1/2 ))
-    fi
-    popd 1>/dev/null
-    pcmd+=" -s $payload"
-    adjust_progress
-}
-
-adjust_progress()
-{
-    if [[ -n $progress && $progress != '1' ]];then 
-        if [[ -e $progress ]];then 
-            pcmd+=" 2>>$progress"
-        else 
-            pcmd+=" 2>$progress"
-        fi
-    elif [[ -z $progress && -n $rlimit  ]];then 
-            # When rlimit is non-zero
-            pcmd="pv -q"
-    fi 
-
-    if [[ -n $rlimit && "$WSREP_SST_OPT_ROLE"  == "donor" ]];then
-        wsrep_log_info "Rate-limiting SST to $rlimit"
-        pcmd+=" -L \$rlimit"
-    fi
-}
-
-read_cnf()
-{
-    sfmt=$(parse_cnf sst streamfmt "tar")
-    tfmt=$(parse_cnf sst transferfmt "socat")
-    tcert=$(parse_cnf sst tca "")
-    tpem=$(parse_cnf sst tcert "")
-    encrypt=$(parse_cnf sst encrypt 0)
-    sockopt=$(parse_cnf sst sockopt "")
-    progress=$(parse_cnf sst progress "")
-    rebuild=$(parse_cnf sst rebuild 0)
-    ttime=$(parse_cnf sst time 0)
-    incremental=$(parse_cnf sst incremental 0)
-    ealgo=$(parse_cnf xtrabackup encrypt "")
-    ekey=$(parse_cnf xtrabackup encrypt-key "")
-    ekeyfile=$(parse_cnf xtrabackup encrypt-key-file "")
-
-    # Refer to http://www.percona.com/doc/percona-xtradb-cluster/manual/xtrabackup_sst.html 
-    if [[ -z $ealgo ]];then
-        ealgo=$(parse_cnf sst encrypt-algo "")
-        ekey=$(parse_cnf sst encrypt-key "")
-        ekeyfile=$(parse_cnf sst encrypt-key-file "")
-    fi
-    rlimit=$(parse_cnf sst rlimit "")
-    uextra=$(parse_cnf sst use_extra 0)
-}
-
-get_stream()
-{
-    if [[ $sfmt == 'xbstream' ]];then 
-        wsrep_log_info "Streaming with xbstream"
-        if [[ "$WSREP_SST_OPT_ROLE"  == "joiner" ]];then
-            strmcmd="xbstream -x"
-        else
-            strmcmd="xbstream -c \${INFO_FILE} \${IST_FILE}"
-        fi
-    else
-        sfmt="tar"
-        wsrep_log_info "Streaming with tar"
-        if [[ "$WSREP_SST_OPT_ROLE"  == "joiner" ]];then
-            strmcmd="tar xfi - --recursive-unlink -h"
-        else
-            strmcmd="tar cf - \${INFO_FILE} \${IST_FILE}"
-        fi
-
-    fi
-}
-
-get_proc()
-{
-    set +e
-    nproc=$(grep -c processor /proc/cpuinfo)
-    [[ -z $nproc || $nproc -eq 0 ]] && nproc=1
-    set -e
-}
-
-sig_joiner_cleanup()
-{
-    wsrep_log_error "Removing $MAGIC_FILE file due to signal"
-    rm -f "$MAGIC_FILE"
-}
-
-cleanup_joiner()
-{
-    # 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
-    if [ "${WSREP_SST_OPT_ROLE}" = "joiner" ];then
-        wsrep_log_info "Removing the sst_in_progress file"
-        wsrep_cleanup_progress_file
-    fi
-    if [[ -n $progress && -p $progress ]];then 
-        wsrep_log_info "Cleaning up fifo file $progress"
-        rm $progress
-    fi
-}
-
-check_pid()
-{
-    local pid_file="$1"
-    [ -r "$pid_file" ] && ps -p $(cat "$pid_file") >/dev/null 2>&1
-}
-
-cleanup_donor()
-{
-    # 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
-
-    if [[ -n $XTRABACKUP_PID ]];then 
-        if check_pid $XTRABACKUP_PID
-        then
-            wsrep_log_error "xtrabackup process is still running. Killing... "
-            kill_xtrabackup
-        fi
-
-        rm -f $XTRABACKUP_PID 
-    fi
-    rm -f ${DATA}/${IST_FILE}
-
-    if [[ -n $progress && -p $progress ]];then 
-        wsrep_log_info "Cleaning up fifo file $progress"
-        rm $progress
-    fi
-}
-
-kill_xtrabackup()
-{
-    local PID=$(cat $XTRABACKUP_PID)
-    [ -n "$PID" -a "0" != "$PID" ] && kill $PID && (kill $PID && kill -9 $PID) || :
-    rm -f "$XTRABACKUP_PID"
-}
-
-# waits ~10 seconds for nc to open the port and then reports ready
-# (regardless of timeout)
-wait_for_listen()
-{
-    local PORT=$1
-    local ADDR=$2
-    local MODULE=$3
-    for i in {1..50}
-    do
-        ss -p state listening "( sport = :$PORT )" | grep -qE 'socat|nc' && break
-        sleep 0.2
-    done
-    if [[ $incremental -eq 1 ]];then 
-        echo "ready ${ADDR}/${MODULE}/$lsn"
-    else 
-    echo "ready ${ADDR}/${MODULE}"
-    fi
-}
-
-check_extra()
-{
-    local use_socket=1
-    if [[ $uextra -eq 1 ]];then 
-        if [ $(parse_cnf --mysqld thread-handling) = 'pool-of-threads'];then
-            local eport=$(parse_cnf --mysqld extra-port)
-            if [[ -n $eport ]];then 
-                # Xtrabackup works only locally.
-                # Hence, setting host to 127.0.0.1 unconditionally. 
-                wsrep_log_info "SST through extra_port $eport"
-                INNOEXTRA+=" --host=127.0.0.1 --port=$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 [[ $use_socket -eq 1 ]] && [[ -n "${WSREP_SST_OPT_SOCKET}" ]];then
-        INNOEXTRA+=" --socket=${WSREP_SST_OPT_SOCKET}"
-    fi
-}
-
-wsrep_check_programs "innobackupex"
-
-rm -f "${MAGIC_FILE}"
-
-if [[ ! ${WSREP_SST_OPT_ROLE} == 'joiner' && ! ${WSREP_SST_OPT_ROLE} == 'donor' ]];then 
-    wsrep_log_error "Invalid role ${WSREP_SST_OPT_ROLE}"
-    exit 22
-fi
-
-read_cnf
-get_stream
-get_transfer
-
-INNOEXTRA=""
-INNOAPPLY="${INNOBACKUPEX_BIN} ${WSREP_SST_OPT_CONF} --apply-log \$rebuildcmd \${DATA} &>\${DATA}/innobackup.prepare.log"
-INNOBACKUP="${INNOBACKUPEX_BIN} ${WSREP_SST_OPT_CONF} \$INNOEXTRA --galera-info --stream=\$sfmt \${TMPDIR} 2>\${DATA}/innobackup.backup.log"
-
-if [ "$WSREP_SST_OPT_ROLE" = "donor" ]
-then
-    trap cleanup_donor EXIT
-
-    if [ $WSREP_SST_OPT_BYPASS -eq 0 ]
-    then
-        usrst=0
-        TMPDIR="${TMPDIR:-/tmp}"
-
-        if [[ -n "${WSREP_SST_OPT_USER:-}" && "$WSREP_SST_OPT_USER" != "(null)" ]]; then
-           INNOEXTRA+=" --user=$WSREP_SST_OPT_USER"
-           usrst=1
-        fi
-
-        if [ -n "${WSREP_SST_OPT_PSWD:-}" ]; then
-           INNOEXTRA+=" --password=$WSREP_SST_OPT_PSWD"
-        elif [[ $usrst -eq 1 ]];then
-           # Empty password, used for testing, debugging etc.
-           INNOEXTRA+=" --password="
-        fi
-
-        get_keys
-        if [[ $encrypt -eq 1 ]];then
-            if [[ -n $ekey ]];then
-                INNOEXTRA+=" --encrypt=$ealgo --encrypt-key=$ekey "
-            else 
-                INNOEXTRA+=" --encrypt=$ealgo --encrypt-key-file=$ekeyfile "
-            fi
-        fi
-
-        if [[ -n $lsn ]];then 
-                INNOEXTRA+=" --incremental --incremental-lsn=$lsn "
-        fi
-
-        check_extra
-
-        wsrep_log_info "Streaming the backup to joiner at ${WSREP_SST_OPT_HOST} ${WSREP_SST_OPT_PORT}"
-
-        if [[ -n $progress ]];then 
-            get_footprint
-            tcmd="$pcmd | $tcmd"
-        elif [[ -n $rlimit ]];then 
-            adjust_progress
-            tcmd="$pcmd | $tcmd"
-        fi
-
-        set +e
-        timeit "Donor-Transfer" "$INNOBACKUP | $tcmd; RC=( "\${PIPESTATUS[@]}" )"
-        set -e
-
-        if [ ${RC[0]} -ne 0 ]; then
-          wsrep_log_error "${INNOBACKUPEX_BIN} finished with error: ${RC[0]}. " \
-                          "Check ${DATA}/innobackup.backup.log"
-          exit 22
-        elif [[ ${RC[$(( ${#RC[@]}-1 ))]} -eq 1 ]];then 
-          wsrep_log_error "$tcmd finished with error: ${RC[1]}"
-          exit 22
-        fi
-
-        # innobackupex implicitly writes PID to fixed location in ${TMPDIR}
-        XTRABACKUP_PID="${TMPDIR}/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}"
-        get_keys
-        pushd ${DATA} 1>/dev/null
-        set +e
-        if [[ $encrypt -eq 1 ]];then
-            tcmd=" $ecmd | $tcmd"
-        fi
-        timeit "Donor-IST-Unencrypted-transfer" "$strmcmd | $tcmd; RC=( "\${PIPESTATUS[@]}" )"
-        set -e
-        popd 1>/dev/null
-
-        for ecode in "${RC[@]}";do 
-            if [[ $ecode -ne 0 ]];then 
-                wsrep_log_error "Error while streaming data to joiner node: " \
-                                "exit codes: ${RC[@]}"
-                exit 1
-            fi
-        done
-    fi
-
-    echo "done ${WSREP_SST_OPT_GTID}"
-    wsrep_log_info "Total time on donor: $totime seconds"
-
-elif [ "${WSREP_SST_OPT_ROLE}" = "joiner" ]
-then
-    [[ -e $SST_PROGRESS_FILE ]] && wsrep_log_info "Stale sst_in_progress file: $SST_PROGRESS_FILE"
-    touch $SST_PROGRESS_FILE
-
-    if [[ ! -e ${DATA}/ibdata1 ]];then 
-        incremental=0
-    fi
-
-    if [[ $incremental -eq 1 ]];then 
-        wsrep_log_info "Incremental SST enabled"
-        #lsn=$(/pxc/bin/mysqld $WSREP_SST_OPT_CONF  --basedir=/pxc  --wsrep-recover 2>&1 | grep -o 'log sequence number .*' | cut -d " " -f 4 | head -1)
-        lsn=$(grep to_lsn xtrabackup_checkpoints | cut -d= -f2 | tr -d ' ')
-        wsrep_log_info "Recovered LSN: $lsn"
-    fi
-
-    sencrypted=1
-    nthreads=1
-
-    MODULE="xtrabackup_sst"
-
-    # May need xtrabackup_checkpoints later on
-    rm -f ${DATA}/xtrabackup_binary ${DATA}/xtrabackup_galera_info  ${DATA}/xtrabackup_logfile
-
-    ADDR="${WSREP_SST_OPT_HOST}:${WSREP_SST_OPT_PORT:-4444}"
-
-    wait_for_listen ${WSREP_SST_OPT_PORT:-4444} ${ADDR} ${MODULE} &
-
-    trap sig_joiner_cleanup HUP PIPE INT TERM
-    trap cleanup_joiner EXIT
-
-    if [[ -n $progress ]];then 
-        adjust_progress
-        tcmd+=" | $pcmd"
-    fi
-
-    if [[ $incremental -eq 1 ]];then 
-        BDATA=$DATA
-        DATA=$(mktemp -d)
-        MAGIC_FILE="${DATA}/${INFO_FILE}"
-    fi
-
-    get_keys
-    set +e
-    if [[ $encrypt -eq 1 && $sencrypted -eq 1 ]];then
-        strmcmd=" $ecmd | $strmcmd"
-    fi
-
-    pushd ${DATA} 1>/dev/null
-    timeit "Joiner-Recv-Unencrypted" "$tcmd | $strmcmd; RC=( "\${PIPESTATUS[@]}" )"
-    popd 1>/dev/null 
-
-    set -e
-
-    if [[ $sfmt == 'xbstream' ]];then 
-        # Special handling till lp:1193240 is fixed"
-        if [[ ${RC[$(( ${#RC[@]}-1 ))]} -eq 1 ]];then 
-            wsrep_log_error "Xbstream failed"
-            wsrep_log_error "Data directory ${DATA} may not be empty: lp:1193240" \
-                            "Manual intervention required in that case"
-            exit 32
-        fi
-    fi
-
-    wait %% # join for wait_for_listen thread
-
-    for ecode in "${RC[@]}";do 
-        if [[ $ecode -ne 0 ]];then 
-            wsrep_log_error "Error while getting data from donor node: " \
-                            "exit codes: ${RC[@]}"
-            exit 32
-        fi
-    done
-
-    if [ ! -r "${MAGIC_FILE}" ]
-    then
-        # this message should cause joiner to abort
-        wsrep_log_error "xtrabackup process ended without creating '${MAGIC_FILE}'"
-        wsrep_log_info "Contents of datadir" 
-        wsrep_log_info "$(ls -l ${DATA}/**/*)"
-        exit 32
-    fi
-
-    if ! ps -p ${WSREP_SST_OPT_PARENT} &>/dev/null
-    then
-        wsrep_log_error "Parent mysqld process (PID:${WSREP_SST_OPT_PARENT}) terminated unexpectedly." 
-        exit 32
-    fi
-
-    if [ ! -r "${DATA}/${IST_FILE}" ]
-    then
-        wsrep_log_info "Proceeding with SST"
-        wsrep_log_info "Removing existing ib_logfile files"
-        if [[ $incremental -ne 1 ]];then 
-            rm -f ${DATA}/ib_logfile*
-        else
-            rm -f ${BDATA}/ib_logfile*
-        fi
-
-        get_proc
-
-        # Rebuild indexes for compact backups
-        if grep -q 'compact = 1' ${DATA}/xtrabackup_checkpoints;then 
-            wsrep_log_info "Index compaction detected"
-            rebuild=1
-        fi
-
-        if [[ $rebuild -eq 1 ]];then 
-            nthreads=$(parse_cnf xtrabackup rebuild-threads $nproc)
-            wsrep_log_info "Rebuilding during prepare with $nthreads threads"
-            rebuildcmd="--rebuild-indexes --rebuild-threads=$nthreads"
-        fi
-
-        if test -n "$(find ${DATA} -maxdepth 1 -type f -name '*.qp' -print -quit)";then
-
-            wsrep_log_info "Compressed qpress files found"
-
-            if ! command -v qpress >/dev/null;then
-                wsrep_log_error "qpress not found in path: $PATH"
-                exit 22
-            fi
-
-            if [[ -n $progress ]] && pv --help | grep -q 'line-mode';then
-                count=$(find ${DATA} -type f -name '*.qp' | wc -l)
-                count=$(( count*2 ))
-                if pv --help | grep -q FORMAT;then 
-                    pvopts="-f -s $count -l -N Decompression -F '%N => Rate:%r Elapsed:%t %e Progress: [%b/$count]'"
-                else 
-                    pvopts="-f -s $count -l -N Decompression"
-                fi
-                pcmd="pv $pvopts"
-                adjust_progress
-                dcmd="$pcmd | xargs -n 2 qpress -T${nproc}d"
-            else 
-                dcmd="xargs -n 2 qpress -T${nproc}d"
-            fi
-
-            wsrep_log_info "Removing existing ibdata1 file"
-            rm -f ${DATA}/ibdata1
-
-            # Decompress the qpress files 
-            wsrep_log_info "Decompression with $nproc threads"
-            timeit "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
-
-        if [[ $incremental -eq 1 ]];then 
-            # Added --ibbackup=xtrabackup_55 because it fails otherwise citing connection issues.
-            INNOAPPLY="${INNOBACKUPEX_BIN} ${WSREP_SST_OPT_CONF} \
-                --ibbackup=xtrabackup_55 --apply-log $rebuildcmd --redo-only $BDATA --incremental-dir=${DATA} &>>${BDATA}/innobackup.prepare.log"
-        fi
-
-        wsrep_log_info "Preparing the backup at ${DATA}"
-        timeit "Xtrabackup prepare stage" "$INNOAPPLY"
-
-        if [[ $incremental -eq 1 ]];then 
-            wsrep_log_info "Cleaning up ${DATA} after incremental SST"
-            [[ -d ${DATA} ]] && rm -rf ${DATA}
-            DATA=$BDATA
-        fi
-
-        if [ $? -ne 0 ];
-        then
-            wsrep_log_error "${INNOBACKUPEX_BIN} finished with errors. Check ${DATA}/innobackup.prepare.log" 
-            exit 22
-        fi
-    else 
-        wsrep_log_info "${IST_FILE} received from donor: Running IST"
-    fi
-
-    if [[ ! -r ${MAGIC_FILE} ]];then
-        wsrep_log_error "SST magic file ${MAGIC_FILE} not found/readable"
-        exit 2
-    fi
-
-    cat "${MAGIC_FILE}" # Output : UUID:seqno wsrep_gtid_domain_id
-    wsrep_log_info "Total time on joiner: $totime seconds"
-fi
-
-exit 0
diff --git a/sql/wsrep_sst.cc b/sql/wsrep_sst.cc
index e648a7f4c69..7a542ab88f1 100644
--- a/sql/wsrep_sst.cc
+++ b/sql/wsrep_sst.cc
@@ -803,6 +803,7 @@ ssize_t wsrep_sst_prepare (void** msg)
 {
   const char* addr_in=  NULL;
   const char* addr_out= NULL;
+  const char* method;
 
   if (!strcmp(wsrep_sst_method, WSREP_SST_SKIP))
   {
@@ -861,7 +862,8 @@ ssize_t wsrep_sst_prepare (void** msg)
   }
 
   ssize_t addr_len= -ENOSYS;
-  if (!strcmp(wsrep_sst_method, WSREP_SST_MYSQLDUMP))
+  method = wsrep_sst_method;
+  if (!strcmp(method, WSREP_SST_MYSQLDUMP))
   {
     addr_len= sst_prepare_mysqldump (addr_in, &addr_out);
     if (addr_len < 0) unireg_abort(1);
@@ -871,6 +873,13 @@ ssize_t wsrep_sst_prepare (void** msg)
     /*! A heuristic workaround until we learn how to stop and start engines */
     if (SE_initialized)
     {
+      if (!strcmp(method, WSREP_SST_XTRABACKUP) ||
+          !strcmp(method, WSREP_SST_XTRABACKUPV2))
+      {
+         WSREP_WARN("The %s SST method is deprecated, so it is automatically "
+                    "replaced by %s", method, WSREP_SST_MARIABACKUP);
+         method = WSREP_SST_MARIABACKUP;
+      }
       // we already did SST at initializaiton, now engines are running
       // sql_print_information() is here because the message is too long
       // for WSREP_INFO.
@@ -880,28 +889,28 @@ ssize_t wsrep_sst_prepare (void** msg)
                  "Wsrep provider won't be able to fall back to it "
                  "if other means of state transfer are unavailable. "
                  "In that case you will need to restart the server.",
-                 wsrep_sst_method);
+                 method);
       *msg = 0;
       return 0;
     }
 
-    addr_len = sst_prepare_other (wsrep_sst_method, sst_auth_real,
+    addr_len = sst_prepare_other (method, sst_auth_real,
                                   addr_in, &addr_out);
     if (addr_len < 0)
     {
       WSREP_ERROR("Failed to prepare for '%s' SST. Unrecoverable.",
-                   wsrep_sst_method);
+                   method);
       unireg_abort(1);
     }
   }
 
-  size_t const method_len(strlen(wsrep_sst_method));
+  size_t const method_len(strlen(method));
   size_t const msg_len   (method_len + addr_len + 2 /* + auth_len + 1*/);
 
   *msg = malloc (msg_len);
   if (NULL != *msg) {
     char* const method_ptr(reinterpret_cast<char*>(*msg));
-    strcpy (method_ptr, wsrep_sst_method);
+    strcpy (method_ptr, method);
     char* const addr_ptr(method_ptr + method_len + 1);
     strcpy (addr_ptr, addr_out);
 
diff --git a/sql/wsrep_sst.h b/sql/wsrep_sst.h
index cc0f1f5389d..29724a00797 100644
--- a/sql/wsrep_sst.h
+++ b/sql/wsrep_sst.h
@@ -49,6 +49,9 @@
 #define WSREP_SST_MYSQLDUMP    "mysqldump"
 #define WSREP_SST_RSYNC        "rsync"
 #define WSREP_SST_SKIP         "skip"
+#define WSREP_SST_MARIABACKUP  "mariabackup"
+#define WSREP_SST_XTRABACKUP   "xtrabackup"
+#define WSREP_SST_XTRABACKUPV2 "xtrabackupv2"
 #define WSREP_SST_DEFAULT      WSREP_SST_RSYNC
 #define WSREP_SST_ADDRESS_AUTO "AUTO"
 #define WSREP_SST_AUTH_MASK    "********"