MySQL 備份腳本--mysqldump在slave 上進行備份mysql
使用mysqldump在slave上進行備份，建議使用stop slave sql_thread,start slave sql_thread,sql
在slave上進行mysqldump備份的時候（--single-transaction），這時候若是主庫對錶發生ddl，從庫的mysqldump備份可能會發生錯誤，table definition has changed,pelase try transaction.mysqldump終止post
#!/bin/sh #create by hq on 20160531 show_slave_status(){ echo -e"-----master.info:-----" >>${LOG_FILE} cat ${MAIN_PATH}/data/master.info | sed -n '2,3p' >>${LOG_FILE} echo -e"----show slave status:----">>${LOG_FILE} echo "show slave status\G" |${MYSQL_CMD} | egrep "Slave_IO_Running|Slave_SQL_Running|Master_Log_File|Read_Master_Log_Pos|Exec_Master_Log_Pos|Relay_Log_File|Relay_Log_Pos" >>${LOG_FILE} echo -e "" >> ${LOG_FILE} } source /data/mysqldata/scripts/mysql_env.ini HOST_PORT=3306 HOST_IP=127.0.0.1 MAIN_PATH=/data/mysqldata/${HOST_PORT} DATA_PATH=/data/mysqldata/backup/mysql_full DATA_FILE=${DATA_PATH}/dbfullbk_`date +%F`.sql.gz LOG_FILE=${DATA_PATH}/dbfullbk_`date +%F`.log MYSQL_PATH=/usr/local/mysql/bin MYSQL_CMD="${MYSQL_PATH}/mysql -u${MYSQL_USER} -p${MYSQL_PASS} -h${HOST_IP} -P${HOST_PORT} -S ${MAIN_PATH}/mysql.sock" MYSQL_DUMP="${MYSQL_PATH}/mysqldump -u${MYSQL_USER} -p${MYSQL_PASS} -h${HOST_IP} -P${HOST_PORT} -A -R -S ${MAIN_PATH}/mysql.sock --single-transaction" echo > ${LOG_FILE} echo -e "====jobs started at `date +%F' '%T' '%w`====\n">>${LOG_FILE} if [ ! -d ${DATA_PATH} ]; then mkdir -p ${DATA_PATH} echo -e "===`${DATA_PATH}` does not exsits,created them!" >> ${LOG_FILE} fi echo -e "**** started postion===:" >>${LOG_FILE} echo "stop slave SQL_THREAD;"| ${MYSQL_CMD} show_slave_status echo -e "**** executed command:${MYSQL_DUMP} |gzip > ${DATA_FILE}">>${LOG_FILE} ${MYSQL_DUMP} | gzip >${DATA_FILE} echo -e "**** execute finished at `date +%F' '%T' '%w`"==== >>${LOG_FILE} echo -e "**** backup file size:`du -sh ${DATA_FILE}`====\n" >>${LOG_FILE} echo -e "**** recheck position====">>${LOG_FILE} show_slave_status echo "start slave SQL_THREAD;" | ${MYSQL_CMD} echo -e "----find expired backup and delete those file ---" >>${LOG_FILE} for tfile in $(/usr/bin/find ${DATA_PATH} -mtime +30) do if [ -d $tfile ] ; then rmdir $tfile elif [ -f $tfile ] ; then rm -f $tfile fi echo -e "---- delete file :$tfile---" >>${LOG_FILE} done echo -e "\n===jobs ended at `date +%F' '%T' '%w` ====\n ">>${LOG_FILE}