mysql主从(主备)同步一键配置,配自动检测功能

主从一键shell配置

做个笔记。

#!/bin/bash
#Mysql sync
#chenglee
#master机器ip
MasterIP="192.168.137.174"
#slave机器ip
SlaveIp="192.168.137.170"
#主从同步账号密码
MASTER_USER="sync"
MASTER_PASSWORD="sync"
#master机mysql登录账号密码
Muser="root"
Mpass="123456"
#slave机mysql登录账号密码
Suser="root"
Spass="123456"
#slave机ssh的登录账号密码
SSHuser="root"
SSHpass="lizhenghua"

function Master(){
    #MASTER
    function create(){
        mysql --protocol=TCP -u ${Muser} -p''${Mpass}'' --connect-expired-password -e "flush PRIVILEGES;" >/dev/null 2>&1
        mysql --protocol=TCP -u ${Muser} -p''${Mpass}'' --connect-expired-password -e "CREATE USER '${MASTER_USER}'@'${SlaveIp}' IDENTIFIED BY '${MASTER_PASSWORD}';" >/dev/null 2>&1
        mysql --protocol=TCP -u ${Muser} -p''${Mpass}'' --connect-expired-password -e "grant replication slave on *.* to '${MASTER_USER}'@'${SlaveIp}' identified by '${MASTER_PASSWORD}';" >/dev/null 2>&1
        mysql --protocol=TCP -u ${Muser} -p''${Mpass}'' --connect-expired-password -e "flush PRIVILEGES;" >/dev/null 2>&1
    }
    #my.cnf
    function addbin(){
        number=`cat -n /etc/my.cnf | grep -F "[mysqld]" | awk '{print$1}'`
        serverID=`echo ${MasterIP} | awk -F'.' '{print$NF}'`
        text1="server-id=${serverID}"
        text2="log-bin=mysql-bin"
        text3="lower_case_table_names=1"
        sed -i "${number}a\${text1}
${text2}
${text3}" /etc/my.cnf
    }
    #restart
    function Mrestart(){
        service mysql restart 
    }
    #ssh
    function mstscSSH(){
        echo -e "33[43;35m 开始配置双机交互，请按回车后输入slave机登录密码 33[0m"
        ssh-keygen -N ''
        ssh-copy-id ${SSHuser}@${SlaveIp}
    }
echo "创建同步账号"
create
echo "添加master端id到my.cnf文件"
addbin
echo "重启master端数据库"
Mrestart
echo "开始账号交互"
mstscSSH
}
#SLAVE
function Slave(){
    #my.cnf
    function addbin2(){
        Snumber2=`ssh ${SSHuser}@${SlaveIp} "cat -n /etc/my.cnf | grep -F "[mysqld]" | awk '{print$1}'" | awk '{print$1}'`
        SserverID2=`echo ${SlaveIp} | awk -F'.' '{print$NF}'`
        Stext1="server-id=${SserverID2}"
        Stext3="lower_case_table_names=1"
        ssh ${SSHuser}@${SlaveIp} "sed -i '${Snumber2}a\${Stext1}
${Stext3}' /etc/my.cnf"
    }
    #restart
    function Srestart(){
        ssh ${SSHuser}@${SlaveIp} "service mysql restart"
    }
    function Ssync(){
        mkdir logs
        mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e "show master status;" > logs/chenglee.logs
        MASTER_HOST=${MasterIP}
        MASTER_LOG_FILE=`cat logs/chenglee.logs | tail -n 1 | awk '{print$1}'`
        MASTER_LOG_POS=`cat logs/chenglee.logs | tail -n 1 | awk '{print$2}'`
        ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e "stop slave;"" >/dev/null 2>&1
        ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e "reset slave;"" >/dev/null 2>&1
        ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e "reset slave all;"" >/dev/null 2>&1
        ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e "change master to master_host='${MasterIP}', master_user='${MASTER_USER}', master_password='${MASTER_PASSWORD}', master_log_file='${MASTER_LOG_FILE}', master_log_pos=${MASTER_LOG_POS}, MASTER_CONNECT_RETRY=10;"" >/dev/null 2>&1
        ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e "start slave;"" >/dev/null 2>&1
        ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e "show slave status G;"" > logs/slave_sync.logs
}
echo "添加master端id到my.cnf文件"
addbin2
echo "重启slave端数据库"
Srestart
echo "开始同步配置"
Ssync
}
#校准同步
#:提示
#当发现主从同步失败的时候， 开启此选项则自动检测并重新配置同步
function calibrate(){
    mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e "show master status;" > logs/chenglee.logs
    ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e "show slave status G;"" > logs/slave_sync.logs
    MASTER_HOST=${MasterIP}
    MASTER_LOG_FILE=`cat logs/chenglee.logs | tail -n 1 | awk '{print$1}'`
    MASTER_LOG_POS=`cat logs/chenglee.logs | tail -n 1 | awk '{print$2}'`
    string1=`cat logs/slave_sync.logs | sed -n '12,13p' | awk -F ':' '{print$2}' | head -n 1`
    string2=`cat logs/slave_sync.logs | sed -n '12,13p' | awk -F ':' '{print$2}' | head -n 2 | tail -n 1`
    if [ ${string1} = ${string2} ];then
        if ( echo ${string1} |grep -q 'Yes' && echo ${string2} |grep -q 'Yes' );then
            echo "主从已同步，无需校准"
        else
            echo "1主从已断开，准备校准"
            ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e "stop slave;""
            ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e "reset slave;""
            ssh ${SSHuser}@${SlaveIp} "service mysql restart"
            ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e "change master to master_host='${MasterIP}', master_user='${MASTER_USER}', master_password='${MASTER_PASSWORD}', master_log_file='${MASTER_LOG_FILE}', master_log_pos=${MASTER_LOG_POS}""
            ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e "start slave;""
            echo "1校准成功"
        fi
        exit
    else
        echo "2主从已断开，准备校准"
        ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e "stop slave;""
        ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e "reset slave;""
        ssh ${SSHuser}@${SlaveIp} "service mysql restart"
        ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e "change master to master_host='${MasterIP}', master_user='${MASTER_USER}', master_password='${MASTER_PASSWORD}', master_log_file='${MASTER_LOG_FILE}', master_log_pos=${MASTER_LOG_POS}""
        ssh ${SSHuser}@${SlaveIp} "mysql --protocol=TCP -u ${Suser} -p''${Spass} --connect-expired-password -e "start slave;""
        echo "2校准成功" 
    fi
}

function main(){
    Master
    Slave
    #calibrate
}
main