mysql主从复制自动化部署脚本

Love The Way You Lie 2022-05-12 12:20 341阅读 0赞

1、之前的脚本有一些局限性，这个脚本是稍微修改了一下的。

#!/bin/bash
    
    #mysql安装包名
    MYSQL_VERSION='mysql-5.6.39-linux-glibc2.12-x86_64'
    
    
    #mysql安装的位置
    MYSQL_INSTALL_PATH='/usr/local'
    
    #存放二进制包的路径
    SOFTWARE_PATH='/opt/software'
    
    #1 步骤输出 紫色
    #2 正确输出 绿色
    #3 错误输出 红色
    #4 提示输出 蓝色
    #5 警告输出 黄色
    function echo_fun(){
      if [ $# -ge 2 ];then
         params_num=$1
         shift 1
         params_mes=$@
      else
        echo_fun 3 请至少输入两个参数 echo_fun ..
        exit
      fi
      case $params_num in
            1)
            echo -e "\033[35;40;1m  ***************************** ${params_mes} *****************************\033[0m\r\n"
            ;;
            2)
            echo -e "\033[32;40;1m ${params_mes}\033[0m\r\n"
            ;;
            3)
            echo -e "\033[31;40;1m ${params_mes}\033[0m\r\n"
            ;;
            4)
            echo -e "\033[36;40;1m ${params_mes}\033[0m\r\n"
            ;;
            5)
            echo -e "\033[33;40;1m ${params_mes} \033[0m\r\n"
            ;;
            *)
            echo_fun 3 参数异常第一个参数应为1,2,3,4,5
            ;;
       esac
    }
    
    echo_fun 1 mysql的HA部署安装
    
    #检查是否安装mysql
    function check_catalog_exist(){
     echo_fun 4 检查$1机器上是否安装了mysql
     num=$(ssh $1 test -d $2 &&  echo 1 || echo 0 )
     if [ $num -eq 1 ];then
       echo_fun 3 "$1机器上的$2目录存在,请注意检查"
       exit
     fi
    }
    
    #检查是否存在mysql用户
    function  check_user_mysql(){
      echo_fun 4 检查$1机器是否存在mysql用户
      num=$(ssh $1 "cat /etc/passwd|grep -w mysql|wc -l" )
      if [ $num -eq 1 ];then
         echo_fun 3 "$ip机器上的mysql用户已经存在,请注意检查"
         exit
      else
         ssh $1 "useradd mysql"
      fi
    
    }
    
    
    #本地解压,发送到主从机器
    function tar_mysql(){
    	
    cd ${SOFTWARE_PATH}
    tar -xf ${MYSQL_VERSION}.tar.gz  -C  ${MYSQL_INSTALL_PATH}
    ln -s ${MYSQL_INSTALL_PATH}/${MYSQL_VERSION}   ${MYSQL_INSTALL_PATH}/mysql
    chown -R mysql:mysql ${MYSQL_INSTALL_PATH}/mysql*
    cd ${MYSQL_INSTALL_PATH}
    chown -R mysql:mysql mysql*
    
    rsync -av mysql  ${MYSQL_VERSION}  $1:${MYSQL_INSTALL_PATH} >/dev/null 2>&1
    
    echo_fun 2 主机器mysql安装目录已经同步完毕
    
    rsync -av mysql  ${MYSQL_VERSION}  $2:${MYSQL_INSTALL_PATH} >/dev/null 2>&1
    
    echo_fun 2 从机器mysql安装目录已经同步完毕
    
    echo_fun 4 删除本地的解压包
    rm -rf ${MYSQL_INSTALL_PATH}/mysql*
    }
    
    
    
    
    #修改主机器上/etc/my.cnf
    function  alter_master_file(){
    ssh -Tq $1 <<remotessh
    	rm -rf /etc/my.cnf
    	cd  ${MYSQL_INSTALL_PATH}/mysql
    	cp support-files/my-default.cnf  /etc/my.cnf
    	cp support-files/mysql.server  /etc/init.d/mysql.server
    	sed -i '/mysqld/a\log-bin-index=master-bin.index' /etc/my.cnf
    	sed -i '/mysqld/a\log-bin=master-bin' /etc/my.cnf
    	sed -i '/mysqld/a\server-id=1' /etc/my.cnf
    	exit
    remotessh
    }
    
    #修改从机器上/etc/my.cnf
    function  alter_slave_file(){
    ssh -Tq $1 <<remotessh
    	rm -rf /etc/my.cnf
    	cd ${MYSQL_INSTALL_PATH}/mysql
    	cp support-files/my-default.cnf  /etc/my.cnf
    	cp support-files/mysql.server  /etc/init.d/mysql.server
    	sed -i '/mysqld/a\relay-log=slave-relay-bin' /etc/my.cnf
    	sed -i '/mysqld/a\relay-log-index=slave-relay-bin.index' /etc/my.cnf
    	sed -i '/mysqld/a\server-id=2' /etc/my.cnf
    	exit
    remotessh
    }
    
    #初始化数据库
    function init_mysql(){
    ssh -Tq $1 <<remotessh
        cd ${MYSQL_INSTALL_PATH}/mysql
    	scripts/mysql_install_db --user=mysql  >/dev/null 2>&1
    	/etc/init.d/mysql.server start
    	exit
    remotessh
    }
    
    
    
    
    echo_fun 2 请输入master机器ip地址
    read -p "master_ip=" master_ip
    echo ''
    #检查主机器mysql安装目录是否存在
    check_catalog_exist ${master_ip} ${MYSQL_INSTALL_PATH}/mysql
    #检查主机器mysql的启动用户mysql是否存在
    #check_user_mysql ${master_ip}
    
    
    echo_fun 2 请输入slave机器ip地址
    read -p "slave_ip=" slave_ip
    echo ''
    #检查从机器mysql安装目录是否存在
    check_catalog_exist ${slave_ip} ${MYSQL_INSTALL_PATH}/mysql
    #检查主机器mysql的启动用户mysql是否存在
    #check_user_mysql ${slave_ip}
    
    
    #开始安装
    echo_fun 4 本机解压，然后发送到主从机器上，时间较长请耐心等待
    
    tar_mysql $master_ip $slave_ip
    
    echo_fun 4 修改主mysql的配置文件
    alter_master_file $master_ip
    
    echo_fun 2 主机器配置文件修改完毕
    
    echo_fun 4 修改主mysql的配置文件
    alter_slave_file $slave_ip
    echo_fun 2 从机器配置文件修改完毕
    
    
    #初始化mysql,并启动
    echo_fun 4 初始化主mysql，并启动主mysql
    init_mysql $master_ip
    echo ''
    
    echo_fun 4 初始化从mysql，并启动从mysql
    init_mysql $slave_ip
    echo ''
    
    #主mysql设置密码和配置
    echo_fun 4  初始化主mysql密码，创建同步master端数据库的用户
    
    echo_fun 2 请输入root用户密码
    read -p "root_passwd=" root_passwd
    echo ''
    
    echo_fun 2 输入同步master数据库到slave端用户
    read -p "replication_user=" r_user
    echo ''
    
    echo_fun 2 输入用户密码
    read -p "replication_passwd=" r_passwd
    
    ssh -Tq ${master_ip}<<EOF
    mysql  -uroot <<eof 
    set password = password("${root_passwd}");
    GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '${root_passwd}';
    GRANT ALL PRIVILEGES ON *.* TO 'root'@localhost IDENTIFIED BY '${root_passwd}';
    GRANT REPLICATION SLAVE ON *.* to '${r_user}'@'%' identified by '${r_passwd}';
    flush privileges;
    eof
    EOF
    
    #postion地址，注意这里不能用$ip ""格式 也不能用awk指令，不知道为什么
    
    postion_num=$(ssh -Tq $master_ip <<eof
        mysql -uroot -p${root_passwd} -e 'show master status\G' 2>/dev/null|grep Position |cut -f2 -d :
    eof
    )
    
    #bin-log文件名 
    log_name=$(ssh -Tq $master_ip <<eof
        mysql -uroot -p${root_passwd} -e 'show master status\G' 2>/dev/null|grep File |cut -f2 -d :
    eof
    )
    
    
    #从mysql设置密码和配置
    ssh -Tq ${slave_ip} <<EOF 
    mysql  -uroot <<eof
    set password = password("${root_passwd}");
    GRANT ALL PRIVILEGES ON *.* TO 'root'@'%' IDENTIFIED BY '${root_passwd}';
    GRANT ALL PRIVILEGES ON *.* TO 'root'@localhost IDENTIFIED BY '${root_passwd}';
    change master to master_host='${master_ip}',master_port=3306,master_user='${r_user}',master_password='${r_passwd}', master_log_file='${log_name}',master_log_pos=${postion_num};
    start slave;
    eof
    EOF
    
    
    #检查是否主从复制搭建成功
    
    running_num=$(ssh -Tq $slave_ip <<eof
       mysql -uroot -p${root_passwd} -e "show slave status\G" 2>/dev/null |grep "Running:"|wc -l
    eof
    )
    
    if [ $running_num -eq 2 ];then
         echo_fun 2 "mysql主从复制搭建成功"     
      else
         echo_fun 3  "mysql主从搭建失败"
    fi

运行结果：

![70][]![70 1][]

![70 2][]

[70]: https://img-blog.csdn.net/20180917224742703?watermark/2/text/aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3d5bDk1Mjc=/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70
[70 1]: /images/20220512/d2a165178eb14e379c06f896f414a5be.png
[70 2]: /images/20220512/350dd2cbcd53409697d06143119676c0.png