MySQL binlog 自動清理指令碼

標籤：清理

# 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 端運行】，以減少磁碟空間 #   每天淩晨 5:30 分運行一次 # #   註：需在 Slave 端添加允許 Master 端訪問的帳號【帳號：check_binlog，密碼：binlog_2356】 #          運行於 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端串連資訊 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狀態資訊查看命令 SQLCMD="show slave status"       #======================================================================================= ## 檢查MySQL是否已經運行 if [[ `ps aux | grep mysql[d] | wc -l` -eq 0 ]]; then    echo The MySQL is not running at: `date +%F" "%H-%M-%S` >> ${LOGFILE}     exit 1 fi       ## 測試Slave端的連通性 nohup mysqladmin -h${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` >> ${LOGFILE}     exit 1 fi       ## 檢查是否合法的Slave MASTER_ADDR=`mysql -h${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` >> ${LOGFILE}     exit 1 fi       ## 獲得Slave端資訊，以此來確定是否處於正常同步的情況 IO_STATUS=`mysql -h${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` >> ${LOGFILE}     exit 1 fi       ## 再做一次判斷，以保證資料同步絕對正常【建立測試資料】 mysql -uroot -e "create database if not exists mytestdb;"sleep 3        retval=`mysql -h${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` >> ${LOGFILE}     exit 1 fi       ## 在已經同步的情況，還需要判斷當前同步的binlog，以此來確定哪些已經是到期的binlog SLAVE_BINLOG1=`mysql -h${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}‘` ## 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 $1}‘`        ## 主從端已經同步到相同的binlog if [[ "${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binlog elif [[ "${SLAVE_BINLOG1}" = "${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` >> ${LOGFILE}     exit 1 fi       mysql -uroot -e "purge binary logs to ‘${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

本文出自 “目標：印度” 部落格，請務必保留此出處http://shunzi115.blog.51cto.com/5184443/1827022

MySQL binlog 自動清理指令碼