1 files changed, 109 insertions, 0 deletions
diff --git a/scripts/wsrep_sst_backup.sh b/scripts/wsrep_sst_backup.sh
new file mode 100644
index 00000000..6f8c6581
--- /dev/null
+++ b/scripts/wsrep_sst_backup.sh
@@ -0,0 +1,109 @@
+#!/usr/bin/env bash
+
+set -ue
+
+# Copyright (C) 2017-2021 MariaDB
+# Copyright (C) 2010-2014 Codership Oy
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; version 2 of the License.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; see the file COPYING. If not, write to the
+# Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston
+# MA  02110-1335  USA.
+
+# This is a reference script for rsync-based state snapshot transfer
+
+RSYNC_REAL_PID=0   # rsync process id
+STUNNEL_REAL_PID=0 # stunnel process id
+
+OS="$(uname)"
+[ "$OS" = 'Darwin' ] && export -n LD_LIBRARY_PATH
+
+# Setting the path for lsof on CentOS
+export PATH="/usr/sbin:/sbin:$PATH"
+
+. $(dirname "$0")/wsrep_sst_common
+
+MAGIC_FILE="$WSREP_SST_OPT_DATA/backup_sst_complete"
+rm -rf "$MAGIC_FILE"
+
+WSREP_LOG_DIR=${WSREP_LOG_DIR:-""}
+# if WSREP_LOG_DIR env. variable is not set, try to get it from my.cnf
+if [ -z "$WSREP_LOG_DIR" ]; then
+    WSREP_LOG_DIR=$(parse_cnf mysqld innodb-log-group-home-dir '')
+fi
+
+if [ -n "$WSREP_LOG_DIR" ]; then
+    # handle both relative and absolute paths
+    WSREP_LOG_DIR=$(cd $WSREP_SST_OPT_DATA; mkdir -p "$WSREP_LOG_DIR"; cd $WSREP_LOG_DIR; pwd -P)
+else
+    # default to datadir
+    WSREP_LOG_DIR=$(cd $WSREP_SST_OPT_DATA; pwd -P)
+fi
+
+if [ "$WSREP_SST_OPT_ROLE" = 'donor' ]
+then
+
+    [ -f "$MAGIC_FILE"      ] && rm -f "$MAGIC_FILE"
+
+    RC=0
+
+    if [ $WSREP_SST_OPT_BYPASS -eq 0 ]; then
+
+        FLUSHED="$WSREP_SST_OPT_DATA/tables_flushed"
+        ERROR="$WSREP_SST_OPT_DATA/sst_error"
+
+        [ -f "$FLUSHED" ] && rm -f "$FLUSHED"
+        [ -f "$ERROR"   ] && rm -f "$ERROR"
+
+        echo "flush tables"
+
+        # Wait for :
+        # (a) Tables to be flushed, AND
+        # (b) Cluster state ID & wsrep_gtid_domain_id to be written to the file, OR
+        # (c) ERROR file, in case flush tables operation failed.
+
+        while [ ! -r "$FLUSHED" ] || \
+                ! grep -q -F ':' -- "$FLUSHED"
+        do
+            # Check whether ERROR file exists.
+            if [ -f "$ERROR" ]; then
+                # Flush tables operation failed.
+                rm -f "$ERROR"
+                exit 255
+            fi
+            sleep 0.2
+        done
+
+        STATE=$(cat "$FLUSHED")
+        rm -f "$FLUSHED"
+
+
+    else # BYPASS
+
+        wsrep_log_info "Bypassing state dump."
+    fi
+
+    echo 'continue' # now server can resume updating data
+
+    echo "$STATE" > "$MAGIC_FILE"
+
+    echo "done $STATE"
+
+else # joiner
+
+    wsrep_log_error "Unsupported role: '$WSREP_SST_OPT_ROLE'"
+    exit 22 # EINVAL
+
+fi
+
+wsrep_log_info "$WSREP_METHOD $WSREP_TRANSFER_TYPE completed on $WSREP_SST_OPT_ROLE"
+exit 0