Memcached啟動指令碼

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1	`# vim /etc/init.d/memcached`

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#!/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" instart) 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=1esac

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

binlog 自動清理指令碼

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1	`# vim /data/scripts/delete_mysql_binlog.sh`

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#!/bin/bash#=======================================================================================# 用於刪除 MySQL Master 端已經同步完的 binlog【需在 Master 端執行】，以減少磁碟空間# 每天凌晨 5:30 分執行一次## 注：需在 Slave 端新增允許 Master 端訪問的帳號【帳號：check_binlog，密碼：binlog_2356】# 執行於 MySQL Master 端【目前只用於一主一從的同步模式，對於多從的情況暫時未考慮】#=======================================================================================PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin ## Slave端連線資訊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狀態資訊檢視命令SQLCMD="show slave status" #=======================================================================================## 檢查MySQL是否已經執行if [[ `ps aux | grep mysql[d] | wc -l` -eq 0 ]]; then echo The MySQL is not running at: `date +%F" "%H-%M-%S` >> ${LOGFILE} exit 1fi ## 測試Slave端的連通性nohup mysqladmin -h${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` >> ${LOGFILE} exit 1fi ## 檢查是否合法的SlaveMASTER_ADDR=`mysql -h${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}" ]]; then echo The MySQL Slave is not lawful at: `date +%F" "%H-%M-%S` >> ${LOGFILE} exit 1fi ## 獲得Slave端資訊，以此來確定是否處於正常同步的情況IO_STATUS=`mysql -h${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` >> ${LOGFILE} exit 1fi ## 再做一次判斷，以保證資料同步絕對正常【建立測試資料】mysql -uroot -e "create database if not exists mytestdb;"sleep 3 retval=`mysql -h${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` >> ${LOGFILE} exit 1fi ## 在已經同步的情況，還需要判斷當前同步的binlog，以此來確定哪些已經是過期的binlogSLAVE_BINLOG1=`mysql -h${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}'`## 獲得Master端，當前的binlog檔案以及binlog路徑MASTER_BINLOG=`mysql -uroot -e "show master status;" | grep -v '^+' | tail -1 | awk '{print $1}'` ## 主從端已經同步到相同的binlogif [[ "${SLAVE_BINLOG1}" = "${SLAVE_BINLOG2}" && "${SLAVE_BINLOG1}" = "${MASTER_BINLOG}" ]]; then CURR_BINLOG="${MASTER_BINLOG}" ## 主從端已經同步，但從端的binlog還沒有追趕到主端最新的binlogelif [[ "${SLAVE_BINLOG1}" = "${SLAVE_BINLOG2}" && "${SLAVE_BINLOG1}" != "${MASTER_BINLOG}" ]]; then CURR_BINLOG="${SLAVE_BINLOG1}" ## 主從端已經同步，主從端的binlog一致，但relaylog還不一致elif [[ "${SLAVE_BINLOG1}" != "${SLAVE_BINLOG2}" && "${SLAVE_BINLOG1}" = "${MASTER_BINLOG}" ]]; then CURR_BINLOG="${SLAVE_BINLOG2}" else echo Has noknown error at：`date +%F" "%H-%M-%S` >> ${LOGFILE} exit 1fi mysql -uroot -e "purge binary logs to '${CURR_BINLOG}';"if [[ $? -eq 0 ]]; then echo Clear MySQL binlog is ok at: `date +%F" "%H-%M-%S` >> ${LOGFILE}fi

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

修復MySQL主從同步

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#!/bin/shPATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/local/sbin:/usr/local/bin LOGFILE=/data/repair_mysql_sync_`date +%F`.logSQLCMD1="show slave status" ## 檢視MySQL是否已啟動if [[ `ps aux | grep mysqld | grep -v grep`"X" = "X" ]]; then echo The MySQL is not running at: `date +%F" "%H-%M-%S` >> ${LOGFILE} exit 1fi ## 獲得MySQL從端Relay binlog的路徑retval=`grep "^relay-log" /etc/my.cnf | grep -v relay-log- | grep '/'`if [[ "${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 ## 查詢master.info檔案，用於定位Binlog資訊MASTER_FILE=`ps aux | grep -w mysqld | grep -v grep | awk '{print $13}' | awk -F '=' '{print $2}'`/master.infoif [[ ! -e ${MASTER_FILE} ]]; then echo This Server is not MySQL Slave at: `date +%F" "%H-%M-%S` >> ${LOGFILE} exit 1fi ## 獲得當前的同步狀態IO_STATUS=`mysql -uroot -e "${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` >> ${LOGFILE} exit 0fi ## 從master.info檔案中，獲得MySQL主端的同步資訊REPLI_INFO=`sed '/^$/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}'` ## 刪除無用的Relay binlogrm -rf ${RELAY_BINLOG_PATH}/*-relay-bin.* ## 直接從0位置開始同步SQLCMD2="change master to master_host='${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 "${SQLCMD2};"mysql -uroot -e "start slave;" ## 如果同步的過程中，出現重複記錄導致同步失敗，就跳過while truedo sleep 2 IO_STATUS=`mysql -uroot -e "${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 $2}'` ## 出現錯誤，就將錯誤資訊記錄到日誌檔案，並跳過錯誤繼續同步 if [[ "${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 fidone

MySQL的一些功能實用的Linux shell指令碼分享

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