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=0 start() { echo -n $"Starting memcached......" $BINFILE -d -l $IPADDR -p $PORT -u $USER -m $SIZE -c $CONNNUM -P $PIDFILE RETVAL=$? echo [ $RETVAL -eq 0 ] && touch $LOCKFILE return $RETVAL } stop() { echo -n $"Shutting down memcached......" /sbin/killproc $BINFILE RETVAL=$? echo [ $RETVAL -eq 0 ] && rm -f $LOCKFILE return $RETVAL } restart() { stop sleep 1 start } reload() { echo -n $"Reloading memcached......" /sbin/killproc $BINFILE -HUP RETVAL=$? echo return $RETVAL } case "$1" in start) start ;; stop) stop ;; restart) restart ;; condrestart) [ -e $LOCKFILE ] && restart RETVAL=$? ;; reload) reload ;; status) status $prog RETVAL=$? ;; *) echo "Usage: $0 {start|stop|restart|condrestart|status}" RETVAL=1 esac
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 ]]; then echo The MySQL is not running at: `date +%F" "%H-%M-%S` >> ${LOGFILE} exit 1 fi ## 测试Slave端的连通性 nohup mysqladmin -h${SLAVE_ADDR} -u${SLAVE_USER} -p${SLAVE_PWD} ping > ${PINGFILE} retval=`grep "^error" ${PINGFILE}` rm -f ${PINGFILE} if [[ "${retval}X" != "X" ]]; then echo The MySQL Slave can not be connected at: `date +%F" "%H-%M-%S` >> ${LOGFILE} exit 1 fi ## 检查是否合法的Slave MASTER_ADDR=`mysql -h${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}" ]]; then echo The MySQL Slave is not lawful at: `date +%F" "%H-%M-%S` >> ${LOGFILE} exit 1 fi ## 获得Slave端信息，以此来确定是否处于正常同步的情况 IO_STATUS=`mysql -h${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" ]]; then echo The MySQL Replication is not synchronous at: `date +%F" "%H-%M-%S` >> ${LOGFILE} exit 1 fi ## 再做一次判断，以保证数据同步绝对正常【创建测试数据】 mysql -uroot -e "create database if not exists mytestdb;" sleep 3 retval=`mysql -h${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" ]]; then echo The MySQL Replication is not synchronous at: `date +%F" "%H-%M-%S` >> ${LOGFILE} exit 1 fi ## 在已经同步的情况，还需要判断当前同步的binlog，以此来确定哪些已经是过期的binlog SLAVE_BINLOG1=`mysql -h${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 $1}'` ## 主从端已经同步到相同的binlog if [[ "${SLAVE_BINLOG1}" = "${SLAVE_BINLOG2}" && "${SLAVE_BINLOG1}" = "${MASTER_BINLOG}" ]]; then CURR_BINLOG="${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binlog elif [[ "${SLAVE_BINLOG1}" = "${SLAVE_BINLOG2}" && "${SLAVE_BINLOG1}" != "${MASTER_BINLOG}" ]]; then CURR_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}" = "${MASTER_BINLOG}" ]]; then CURR_BINLOG="${SLAVE_BINLOG2}" else echo Has noknown error at：`date +%F" "%H-%M-%S` >> ${LOGFILE} exit 1 fi mysql -uroot -e "purge binary logs to '${CURR_BINLOG}';" if [[ $? -eq 0 ]]; then echo 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/sh PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin LOGFILE=/data/repair_mysql_sync_`date +%F`.log SQLCMD1="show slave status" ## 查看MySQL是否已启动 if [[ `ps aux | grep mysqld | grep -v grep`"X" = "X" ]]; then echo The MySQL is not running at: `date +%F" "%H-%M-%S` >> ${LOGFILE} exit 1 fi ## 获得MySQL从端Relay binlog的路径 retval=`grep "^relay-log" /etc/my.cnf | grep -v relay-log- | grep '/'` if [[ "${retval}" = "X" ]]; then RELAY_BINLOG_PATH=`ps aux | grep -w mysqld | grep -v grep | awk '{print $13}' | awk -F '=' '{print $2}'` else RELAY_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.info if [[ ! -e ${MASTER_FILE} ]]; then echo This Server is not MySQL Slave at: `date +%F" "%H-%M-%S` >> ${LOGFILE} exit 1 fi ## 获得当前的同步状态 IO_STATUS=`mysql -uroot -e "${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" ]]; then echo Now, The MySQL Replication is synchronous at: `date +%F" "%H-%M-%S` >> ${LOGFILE} exit 0 fi ## 从master.info文件中，获得MySQL主端的同步信息 REPLI_INFO=`sed '/^$/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 binlog rm -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 "${SQLCMD2};" mysql -uroot -e "start slave;" ## 如果同步的过程中，出现重复记录导致同步失败，就跳过 while true do sleep 2 IO_STATUS=`mysql -uroot -e "${SQLCMD1}G;" | awk '$1=="Slave_IO_Running:" {print $2}'` SQL_STATUS=`mysql -uroot -e "${SQLCMD1}G;" | awk '$1=="Slave_SQL_Running:" {print $2}'` BEHIND_STATUS=`mysql -uroot -e "${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" || "${SQL_STATUS}" != "Yes" ]]; then ERRORINFO=`mysql -uroot -e "${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 ]]; then echo The MySQL synchronous is ok at: `date +%F" "%H-%M-%S` >> ${LOGFILE} break fi done