MySQL的一些功能实用的Linux shell脚本分享

Memcached启动脚本

# vim /etc/init.d/memcached

#！/bin/bash#=======================================================================================# chkconfig: - 80 12# description: Distributed memory caching daemon# processname: memcached#=======================================================================================IPADDR=`/sbin/ifconfig eth1 | awk -F ":" "/inet addr/{print $2}" | sed "s/[a-zA-Z ]//g"`PORT="11211"USER="root"SIZE="2048"CONNNUM="51200"PIDFILE="/var/run/memcached.pid"BINFILE="/usr/local/memcached/bin/memcached"LOCKFILE="/var/lock/subsys/memcached"RETVAL=0start（） {echo -n $"Starting memcached......"$BINFILE -d -l $IPADDR -p $PORT -u $USER -m $SIZE -c $CONNNUM -P $PIDFILERETVAL=$?echo[ $RETVAL -eq 0 ] && touch $LOCKFILEreturn $RETVAL}stop（） {echo -n $"Shutting down memcached......"/sbin/killproc $BINFILERETVAL=$?echo[ $RETVAL -eq 0 ] && rm -f $LOCKFILEreturn $RETVAL}restart（） {stopsleep 1start}reload（） {echo -n $"Reloading memcached......"/sbin/killproc $BINFILE -HUPRETVAL=$?echoreturn $RETVAL}case "$1" instart）start;;stop）stop;;restart）restart;;condrestart）[ -e $LOCKFILE ] && restartRETVAL=$?;;reload）reload;;status）status $progRETVAL=$?;;*）echo "Usage: $0 {start|stop|restart|condrestart|status}"RETVAL=1esac

exit $RETVAL# chmod +x /etc/init.d/memcached# chkconfig --add memcached# chkconfig --level 235 memcached on# service memcached start

binlog 自动清理脚本

# vim /data/scripts/delete_mysql_binlog.sh

#！/bin/bash#=======================================================================================#用于删除 MySQL Master 端已经同步完的 binlog【需在 Master 端运行】，以减少磁盘空间#每天凌晨 5:30 分运行一次##注：需在 Slave 端添加允许 Master 端访问的帐号【帐号：check_binlog，密码：binlog_2356】# 运行于 MySQL Master 端【目前只用于一主一从的同步模式，对于多从的情况暂时未考虑】#=======================================================================================PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin ## Slave端连接信息SLAVE_ADDR="XXX.XXX.XXX.XXX"SLAVE_USER="check_binlog"SLAVE_PWD="binlog_2356" LOGFILE="/data/logs/db_sync_info.log"PINGFILE="/tmp/mysqlping.log" ## MySQL状态信息查看命令SQLCMD="show slave status" #=======================================================================================## 检查MySQL是否已经运行if [[ `ps aux | grep mysql[d] | wc -l` -eq 0 ]]; thenecho The MySQL is not running at: `date +%F" "%H-%M-%S` >> ${LOGFILE}exit 1fi ## 测试Slave端的连通性nohup mysqladmin -h${SLAVE_ADDR} -u${SLAVE_USER} -p${SLAVE_PWD} ping > ${PINGFILE}retval=`grep "^error" ${PINGFILE}`rm -f ${PINGFILE}if [[ "${retval}X" ！= "X" ]]; thenecho The MySQL Slave can not be connected at: `date +%F" "%H-%M-%S` >> ${LOGFILE}exit 1fi ## 检查是否合法的SlaveMASTER_ADDR=`mysql -h${SLAVE_ADDR} -u${SLAVE_USER} -p${SLAVE_PWD} -e "${SQLCMD}G;" | awk "$1=="Master_Host:" {print $2}"`LOCAL_ADDR=`/sbin/ifconfig eth1 | awk -F ":" "/inet addr/{print $2}" | sed "s/[a-zA-Z ]//g"`if [[ "${MASTER_ADDR}" ！= "${LOCAL_ADDR}" ]]; thenecho The MySQL Slave is not lawful at: `date +%F" "%H-%M-%S` >> ${LOGFILE}exit 1fi ## 获得Slave端信息，以此来确定是否处于正常同步的情况IO_STATUS=`mysql -h${SLAVE_ADDR} -u${SLAVE_USER} -p${SLAVE_PWD} -e "${SQLCMD}G;" | awk "$1=="Slave_IO_Running:" {print $2}"`SQL_STATUS=`mysql -h${SLAVE_ADDR} -u${SLAVE_USER} -p${SLAVE_PWD} -e "${SQLCMD}G;" | awk "$1=="Slave_SQL_Running:" {print $2}"`if [[ "${IO_STATUS}" ！= "Yes" || "${SQL_STATUS}" ！= "Yes" ]]; thenecho The MySQL Replication is not synchronous at: `date +%F" "%H-%M-%S` >> ${LOGFILE}exit 1fi ## 再做一次判断，以保证数据同步绝对正常【创建测试数据】mysql -uroot -e "create database if not exists mytestdb;"sleep 3 retval=`mysql -h${SLAVE_ADDR} -u${SLAVE_USER} -p${SLAVE_PWD} -e "show databases;" | grep mytestdb`mysql -uroot -e "drop database if exists mytestdb;"if [[ "${retval}X" = "X" ]]; thenecho The MySQL Replication is not synchronous at: `date +%F" "%H-%M-%S` >> ${LOGFILE}exit 1fi ## 在已经同步的情况，还需要判断当前同步的binlog，以此来确定哪些已经是过期的binlogSLAVE_BINLOG1=`mysql -h${SLAVE_ADDR} -u${SLAVE_USER} -p${SLAVE_PWD} -e "${SQLCMD}G;" | awk "$1=="Master_Log_File:" {print $2}"`SLAVE_BINLOG2=`mysql -h${SLAVE_ADDR} -u${SLAVE_USER} -p${SLAVE_PWD} -e "${SQLCMD}G;" | awk "$1=="Relay_Master_Log_File:" {print $2}"`## 获得Master端，当前的binlog文件以及binlog路径MASTER_BINLOG=`mysql -uroot -e "show master status;" | grep -v "^+" | tail -1 | awk "{print $1}"` ## 主从端已经同步到相同的binlogif [[ "${SLAVE_BINLOG1}" = "${SLAVE_BINLOG2}" && "${SLAVE_BINLOG1}" = "${MASTER_BINLOG}" ]]; thenCURR_BINLOG="${MASTER_BINLOG}" ## 主从端已经同步，但从端的binlog还没有追赶到主端最新的binlogelif [[ "${SLAVE_BINLOG1}" = "${SLAVE_BINLOG2}" && "${SLAVE_BINLOG1}" ！= "${MASTER_BINLOG}" ]]; thenCURR_BINLOG="${SLAVE_BINLOG1}" ## 主从端已经同步，主从端的binlog一致，但relaylog还不一致elif [[ "${SLAVE_BINLOG1}" ！= "${SLAVE_BINLOG2}" && "${SLAVE_BINLOG1}" = "${MASTER_BINLOG}" ]]; thenCURR_BINLOG="${SLAVE_BINLOG2}" elseecho Has noknown error at：`date +%F" "%H-%M-%S` >> ${LOGFILE}exit 1fi mysql -uroot -e "purge binary logs to "${CURR_BINLOG}";"if [[ $? -eq 0 ]]; thenecho Clear MySQL binlog is ok at: `date +%F" "%H-%M-%S` >> ${LOGFILE}fi

# crontab -e 30 05 * * * /data/scripts/delete_mysql_binlog.sh >/dev/null 2>&1

修复MySQL主从同步

#！/bin/shPATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/binLOGFILE=/data/repair_mysql_sync_`date +%F`.logSQLCMD1="show slave status"## 查看MySQL是否已启动if [[ `ps aux | grep mysqld | grep -v grep`"X" = "X" ]]; thenecho The MySQL is not running at: `date +%F" "%H-%M-%S` >> ${LOGFILE}exit 1fi## 获得MySQL从端Relay binlog的路径retval=`grep "^relay-log" /etc/my.cnf | grep -v relay-log- | grep "/"`if [[ "${retval}" = "X" ]]; thenRELAY_BINLOG_PATH=`ps aux | grep -w mysqld | grep -v grep | awk "{print $13}" | awk -F "=" "{print $2}"`elseRELAY_BINLOG_PATH=`dirname $（echo ${retval} | awk -F "=" "{print $2}"）`fi## 查找master.info文件，用于定位Binlog信息MASTER_FILE=`ps aux | grep -w mysqld | grep -v grep | awk "{print $13}" | awk -F "=" "{print $2}"`/master.infoif [[ ！ -e ${MASTER_FILE} ]]; thenecho This Server is not MySQL Slave at: `date +%F" "%H-%M-%S` >> ${LOGFILE}exit 1fi## 获得当前的同步状态IO_STATUS=`mysql -uroot -e "${SQLCMD1}G;" | awk "$1=="Slave_IO_Running:" {print $2}"`SQL_STATUS=`mysql -uroot -e "${SQLCMD1}G;" | awk "$1=="Slave_SQL_Running:" {print $2}"`if [[ "${IO_STATUS}" = "Yes" && "${SQL_STATUS}" = "Yes" ]]; thenecho Now, The MySQL Replication is synchronous at: `date +%F" "%H-%M-%S` >> ${LOGFILE}exit 0fi## 从master.info文件中，获得MySQL主端的同步信息REPLI_INFO=`sed "/^$/d" ${MASTER_FILE} | tail +2 | head -5`REPLI_BINLOG_FILE=`echo ${REPLI_INFO} | awk "{print $1}"`REPLI_IPADDR=`echo ${REPLI_INFO} | awk "{print $3}"`REPLI_USER=`echo ${REPLI_INFO} | awk "{print $4}"`REPLI_PWD=`echo ${REPLI_INFO} | awk "{print $5}"`## 删除无用的Relay binlogrm -rf ${RELAY_BINLOG_PATH}/*-relay-bin.*## 直接从0位置开始同步SQLCMD2="change master to master_host="${REPLI_IPADDR}", master_user="${REPLI_USER}", master_password="${REPLI_PWD}","SQLCMD2="${SQLCMD2} master_log_file="${REPLI_BINLOG_FILE}", master_log_pos=0"mysql -uroot -e "stop slave;"mysql -uroot -e "${SQLCMD2};"mysql -uroot -e "start slave;"## 如果同步的过程中，出现重复记录导致同步失败，就跳过while truedosleep 2IO_STATUS=`mysql -uroot -e "${SQLCMD1}G;" | awk "$1=="Slave_IO_Running:" {print $2}"`SQL_STATUS=`mysql -uroot -e "${SQLCMD1}G;" | awk "$1=="Slave_SQL_Running:" {print $2}"`BEHIND_STATUS=`mysql -uroot -e "${SQLCMD1}G;" | awk "$1=="Seconds_Behind_Master:" {print $2}"`SLAVE_BINLOG1=`mysql -uroot -e "${SQLCMD1}G;" | awk "$1=="Master_Log_File:" {print $2}"`SLAVE_BINLOG2=`mysql -uroot -e "${SQLCMD1}G;" | awk "$1=="Relay_Master_Log_File:" {print $2}"`## 出现错误，就将错误信息记录到日志文件，并跳过错误继续同步if [[ "${IO_STATUS}" ！= "Yes" || "${SQL_STATUS}" ！= "Yes" ]]; thenERRORINFO=`mysql -uroot -e "${SQLCMD1}G;" | awk -F ": " "$1=="Last_Error" {print $2}"`echo "The MySQL synchronous error information: ${ERRORINFO}" >> ${LOGFILE}mysql -uroot -e "stop slave;"mysql -uroot -e "set GLOBAL SQL_SLAVE_SKIP_COUNTER=1;"mysql -uroot -e "start slave;"## 已完成同步，就正常退出elif [[ "${IO_STATUS}" = "Yes" && "${SQL_STATUS}" = "Yes" && "${SLAVE_BINLOG1}" = "${SLAVE_BINLOG2}" && ${BEHIND_STATUS} -eq 0 ]]; thenecho The MySQL synchronous is ok at: `date +%F" "%H-%M-%S` >> ${LOGFILE}breakfidone