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#!/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 ':' -- "$FLUSHED" >/dev/null 2>&1
do
# Check whether ERROR file exists.
if [ -f "$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
exit 0
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