MDEV-35749: Add support for --use-memory option for SST with mariabackup

Mariabackup (mariadb-backup) supports the --use-memory option that
sets the buffer pool size for innodb. However, current SST scripts
do not use this option. This commit adds support for this option,
the value for which can be specified via the "use_memory" parameter
in the configuration file in the [sst], [mariabackup] or [xtrabackup]
sections (supported only for compatibility with old configurations).

In addition, if the innodb_buffer_pool_size option is specified in
the user configuration (in the main server configuration sections)
or passed to the SST scripts or the server via arguments, its value
is also passed to mariadb-backup as the value for the --use-memory
option.

A new section name [mariabackup] has also been added, which can
be used instead of the deprecated [xtrabackup] (the section name
"mariabackup" was specified in the documentation, but was not
actually supported by SST scripts before this commit).

mysql-test/suite/galera/r/galera_sst_mariabackup_use_memory.result

@@ -0,0 +1,13 @@
+connection node_2;
+connection node_1;
+connection node_1;
+connection node_2;
+connection node_2;
+Shutting down server ...
+connection node_1;
+Cleaning var directory ...
+connection node_2;
+Starting server ...
+include/assert_grep.inc [mariabackup: Using 128974848 bytes for buffer pool \(set by --use-memory parameter\)]
+disconnect node_2;
+disconnect node_1;

mysql-test/suite/galera/t/galera_sst_mariabackup_use_memory.cnf

@@ -0,0 +1,8 @@
+!include ../galera_2nodes.cnf
+
+[mysqld]
+wsrep_sst_method=mariabackup
+wsrep_sst_auth="root:"
+
+[mariabackup]
+use_memory=123m

mysql-test/suite/galera/t/galera_sst_mariabackup_use_memory.test

@@ -0,0 +1,53 @@
+--source include/galera_cluster.inc
+--source include/have_innodb.inc
+--source include/have_mariabackup.inc
+
+# Save original auto_increment_offset values.
+--let $node_1=node_1
+--let $node_2=node_2
+--source include/auto_increment_offset_save.inc
+
+--connection node_2
+
+--echo Shutting down server ...
+--source include/shutdown_mysqld.inc
+
+--connection node_1
+--let $wait_condition = SELECT VARIABLE_VALUE = 1 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size'
+--source include/wait_condition.inc
+
+#
+# Force SST
+#
+--echo Cleaning var directory ...
+--remove_file $MYSQLTEST_VARDIR/mysqld.2/data/grastate.dat
+--remove_files_wildcard $MYSQLTEST_VARDIR/mysqld.2/data/mtr
+--remove_files_wildcard $MYSQLTEST_VARDIR/mysqld.2/data/performance_schema
+--remove_files_wildcard $MYSQLTEST_VARDIR/mysqld.2/data/test
+--remove_files_wildcard $MYSQLTEST_VARDIR/mysqld.2/data/mysql
+--remove_files_wildcard $MYSQLTEST_VARDIR/mysqld.2/data
+
+--connection node_2
+
+--echo Starting server ...
+let $restart_noprint=2;
+--source include/start_mysqld.inc
+
+--let $wait_condition = SELECT VARIABLE_VALUE = 2 FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_cluster_size';
+--source include/wait_condition.inc
+
+--let $wait_condition = SELECT VARIABLE_VALUE = 'ON' FROM INFORMATION_SCHEMA.GLOBAL_STATUS WHERE VARIABLE_NAME = 'wsrep_ready';
+--source include/wait_condition.inc
+
+# Confirm that IST did not take place
+--let $assert_text = mariabackup: Using 128974848 bytes for buffer pool \(set by --use-memory parameter\)
+--let $assert_select = mariabackup: Using 128974848 bytes for buffer pool \(set by --use-memory parameter\)
+--let $assert_count = 1
+--let $assert_file = $MYSQLTEST_VARDIR/mysqld.2/data/mariabackup.prepare.log
+--let $assert_only_after = Starting InnoDB instance for recovery
+--source include/assert_grep.inc
+
+# Restore original auto_increment_offset values.
+--source include/auto_increment_offset_restore.inc
+
+--source include/galera_end.inc

scripts/wsrep_sst_common.sh

@@ -209,6 +209,7 @@ INNODB_DATA_HOME_DIR=$(trim_dir "${INNODB_DATA_HOME_DIR:-}")
 INNODB_LOG_GROUP_HOME=$(trim_dir "${INNODB_LOG_GROUP_HOME:-}")
 INNODB_UNDO_DIR=$(trim_dir "${INNODB_UNDO_DIR:-}")
 INNODB_BUFFER_POOL=""
+INNODB_BUFFER_POOL_SIZE=""
 INNODB_FORCE_RECOVERY=""
 INNOEXTRA=""
 
@@ -329,6 +330,10 @@ case "$1" in
         readonly INNODB_BUFFER_POOL=$(trim_string "$2")
         shift
         ;;
+    '--innodb-buffer-pool-size')
+        readonly INNODB_BUFFER_POOL_SIZE=$(trim_string "$2")
+        shift
+        ;;
     '--defaults-file')
         file=$(trim_string "$2")
         readonly WSREP_SST_OPT_DEFAULT="$1=$file"
@@ -607,6 +612,12 @@ case "$1" in
                        fi
                        skip_mysqld_arg=1
                        ;;
+                   '--innodb-buffer-pool-size')
+                       if [ -z "$INNODB_BUFFER_POOL_SIZE" ]; then
+                           MYSQLD_OPT_INNODB_BUFFER_POOL_SIZE=$(trim_string "$value")
+                       fi
+                       skip_mysqld_arg=1
+                       ;;
                    '--innodb-force-recovery')
                        if [ -n "$value" -a "$value" != "0" ]; then
                            INNODB_FORCE_RECOVERY=$(trim_string "$value")
@@ -696,6 +707,10 @@ if [ -n "${MYSQLD_OPT_INNODB_BUFFER_POOL:-}" -a \
      -z "$INNODB_BUFFER_POOL" ]; then
     readonly INNODB_BUFFER_POOL="$MYSQLD_OPT_INNODB_BUFFER_POOL"
 fi
+if [ -n "${MYSQLD_OPT_INNODB_BUFFER_POOL_SIZE:-}" -a \
+     -z "$INNODB_BUFFER_POOL_SIZE" ]; then
+    readonly INNODB_BUFFER_POOL_SIZE="$MYSQLD_OPT_INNODB_BUFFER_POOL_SIZE"
+fi
 if [ -n "${MYSQLD_OPT_LOG_BIN:-}" -a \
      -z "$WSREP_SST_OPT_BINLOG" ]; then
     readonly WSREP_SST_OPT_BINLOG="$MYSQLD_OPT_LOG_BIN"
@@ -752,6 +767,9 @@ fi
 if [ -n "$INNODB_BUFFER_POOL" ]; then
     INNOEXTRA="$INNOEXTRA --innodb-buffer-pool-filename='$INNODB_BUFFER_POOL'"
 fi
+if [ -n "$INNODB_BUFFER_POOL_SIZE" ]; then
+    INNOEXTRA="$INNOEXTRA --innodb-buffer-pool-size='$INNODB_BUFFER_POOL_SIZE'"
+fi
 if [ -n "$WSREP_SST_OPT_BINLOG" ]; then
     INNOEXTRA="$INNOEXTRA --log-bin='$WSREP_SST_OPT_BINLOG'"
     if [ -n "$WSREP_SST_OPT_BINLOG_INDEX" ]; then
@@ -1775,14 +1793,14 @@ simple_cleanup()
 create_data()
 {
     OLD_PWD="$(pwd)"
+    DATA_DIR="$OLD_PWD"
 
     if [ -n "$DATA" -a "$DATA" != '.' ]; then
         [ ! -d "$DATA" ] && mkdir -p "$DATA"
         cd "$DATA"
+        DATA_DIR="$(pwd)"
+        cd "$OLD_PWD"
     fi
-    DATA_DIR="$(pwd)"
-
-    cd "$OLD_PWD"
 }
 
 create_dirs()

scripts/wsrep_sst_mariabackup.sh

@@ -540,7 +540,8 @@ adjust_progress()
     fi
 }
 
-encgroups='--mysqld|sst|xtrabackup'
+bkgroups='sst|xtrabackup|mariabackup'
+encgroups="--mysqld|$bkgroups"
 
 read_cnf()
 {
@@ -596,26 +597,34 @@ read_cnf()
         ssl_dhparams=$(parse_cnf "$encgroups" 'ssl-dhparams')
     fi
 
-    sockopt=$(parse_cnf sst sockopt "")
-    progress=$(parse_cnf sst progress "")
+    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 "")
+    scomp=$(parse_cnf sst compressor)
+    sdecomp=$(parse_cnf sst decompressor)
 
-    rlimit=$(parse_cnf sst rlimit "")
+    rlimit=$(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 "${SST_SYSLOG_TAG:-}")
+    speciald=$(parse_cnf sst 'sst-special-dirs' 1)
+    iopts=$(parse_cnf "$bkgroups" 'inno-backup-opts')
+    iapts=$(parse_cnf "$bkgroups" 'inno-apply-opts')
+    impts=$(parse_cnf "$bkgroups" 'inno-move-opts')
+    use_memory=$(parse_cnf "$bkgroups" 'use-memory')
+    if [ -z "$use_memory" ]; then
+        if [ -n "$INNODB_BUFFER_POOL_SIZE" ]; then
+            use_memory="$INNODB_BUFFER_POOL_SIZE"
+        else
+            use_memory=$(parse_cnf '--mysqld' 'innodb-buffer-pool-size')
+        fi
+    fi
+    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)
+    sstlogarchive=$(parse_cnf sst 'sst-log-archive' 1)
     sstlogarchivedir=""
     if [ $sstlogarchive -ne 0 ]; then
         sstlogarchivedir=$(parse_cnf sst sst-log-archive-dir \
@@ -1053,6 +1062,9 @@ setup_commands()
     if [ -n "$INNODB_FORCE_RECOVERY" ]; then
         recovery=" --innodb-force-recovery=$INNODB_FORCE_RECOVERY"
     fi
+    if [ -n "$use_memory" ]; then
+        INNOEXTRA="$INNOEXTRA --use-memory=$use_memory"
+    fi
     INNOAPPLY="$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$INNOEXTRA --galera-info --force-non-empty-directories --target-dir='$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"