mysql主从搭建脚本

#!/bin/bash
#PS=mysql主从配置,主从端版本必须一致;
Master_ipddr="192.168.0.191"
Allow_segment=`echo ${Master_ipddr}. |awk -F'.' '{gsub($(NF-1)"."$NF,"");print}'`
Slave_ipaddr="192.168.0.118"
Mysql_user="root"
Mysql_passwd="redhat@2022"
Replication_user="repluser"
Replication_passwd="123456"
Replication_port="3306"
color_green="echo -e \033[1;32m"
color_red="echo -e \033[1;31m"
color_end="\033[0m"
Mysql_log_file="/date/mysql-bin.log"
Backup_time=`date  "+%Y-%m-%d_%H:%M"`
Slave_user="root"
Slave_path="/etc/my.cnf"
read -s -p "请输入Slave passwd:" Slave_passwd
read -s -p "请输入Master passwd:" Master_passwd
function Master_Change_config () {
#修改主端配置文件
    if [ -f /etc/my.cnf.d/server.cnf -a -e /etc/my.cnf.d/server.cnf  ] && \
            [[ $(grep -o '\[mysqld\]' /etc/my.cnf.d/server.cnf) ]];then           
                #设置serverid：
                    grep -o 'server-id' /etc/my.cnf.d/server.cnf || sed -ri.bak '/\[mysqld\]/a\server-id=191' /etc/my.cnf.d/server.cnf
                #设置二进制日志路径：
                    grep -o 'log-bin=' /etc/my.cnf.d/server.cnf || sed -ri '/\[mysqld\]/a\log-bin=/data/mysql/logbin/mysql-bin'  /etc/my.cnf.d/server.cnf && \
                    mkdir -p /data/mysql/logbin/;chown -R mysql.mysql /data/mysql/logbin/
                #设置二进制日志同步:
                    grep -o 'sync_binlog' //etc/my.cnf.d/server.cnf || sed -ri '/\[mysqld\]/a\sync_binlog=1' /etc/my.cnf.d/server.cnf
                #设置事务提交立刻同步日志写磁盘:
                    grep -o 'innodb_flush_log_at_trx_commit' /etc/my.cnf.d/server.cnf || sed -ri '/\[mysqld\]/a\innodb_flush_log_at_trx_commit=1' /etc/my.cnf.d/server.cnf
                #设置N次事务后同步:
                    grep -o 'sync_master_info' /etc/my.cnf.d/server.cnf || sed -ri '/\[mysqld\]/a\sync_master_info=10' /etc/my.cnf.d/server.cnf
                #关闭selinux:
                    grep -ro '^SELINUX=disabled' /etc/selinux/config || { setenforce 0;sed -ri  's/^(SELINUX=).*/\1disabled' /etc/selinux/config; }
                    [[ `grep -o 'server-id' /etc/my.cnf.d/server.cnf /etc/my.cnf.d/server.cnf` ]] && \
                    [[ `grep -o 'log-bin=' /etc/my.cnf.d/server.cnf /etc/my.cnf.d/server.cnf` ]] && \
                    [[ `grep -o 'sync_binlog' //etc/my.cnf.d/server.cnf /etc/my.cnf.d/server.cnf` ]] && \
                    [[ `grep -o 'innodb_flush_log_at_trx_commit' /etc/my.cnf.d/server.cnf` ]] && \
                    ${color_green}"master配置完成"${color_end} ||  { ${color_red}"master配置失败"${color_end};exit 1; }
    elif [ -f /etc/my.cnf.d/mysql-server.cnf -a -e /etc/my.cnf.d/mysql-server.cnf ] && \
                [[ $(grep '[mysqld]' /etc/my.cnf.d/mysql-server.cnf)  ]];then 
                #设置serverid：
                    grep -o 'server-id' /etc/my.cnf.d/mysql-server.cnf || sed -ri '/\[mysqld\]/a\server-id/=建议为IP的最后的值' /etc/my.cnf.d/server.cnf
                #设置二进制日志路径：
                    grep -o 'log-bin=' /etc/my.cnf.d/mysql-server.cnf || sed -ri '/\[mysqld\]/a\log-bin=/data/mysql/logbin/mysql-bin/'  /etc/my.cnf.d/server.cnf
                #设置二进制日志同步:
                    grep -o 'sync_binlog' //etc/my.cnf.d/mysql-server.cnf || sed -ri '/\[mysqld\]/a\sync_binlog=1' /etc/my.cnf.d/server.cnf
                #设置事务提交立刻同步日志写磁盘:
                    grep -o 'innodb_flush_log_at_trx_commit' /etc/my.cnf.d/mysql-server.cnf || sed -ri '/\[mysqld\]/a\innodb_flush_log_at_trx_commit=1' /etc/my.cnf.d/server.cnf
                #设置N次事务后同步:
                    grep -o 'sync_master_info' /etc/my.cnf.d/mysql-server.cnf || sed -ri '/\[mysqld\]/a\sync_master_info=10' /etc/my.cnf.d/server.cnf
                #关闭selinux:
                    grep -ro '^SELINUX=disabled' /etc/selinux/config || { setenforce 0;sed -ri  's/^(SELINUX=).*/\1disabled/' /etc/selinux/config; }
                    [[ `grep -o 'server-id' /etc/my.cnf.d/server.cnf /etc/my.cnf.d/mysql-server.cnf` ]] && \
                    [[ `grep -o 'log-bin=' /etc/my.cnf.d/server.cnf /etc/my.cnf.d/mysql-server.cnf` ]] && \
                    [[ `grep -o 'sync_binlog' //etc/my.cnf.d/server.cnf /etc/my.cnf.d/mysql-server.cnf` ]] && \
                    [[ `grep -o 'innodb_flush_log_at_trx_commit' /etc/my.cnf.d/mysql-server.cnf` ]] && \
                    ${color_green}"master配置完成"${color_end} || { ${color_red}"master配置失败"${color_end};exit 1; }

    else
                ${color_red}"无配置文件,请安装后启动mysql"${color_end}
        
    fi
      #重启mysql:
            systemctl restart mysqld.service &> /dev/null || systemctl restart mariadb.service &> /dev/null 

}


#创建主端replication用户，并授权;
function create_Replication_user() {
        [ -d /date ]  || mkdir -p /date
        mysql -u${Mysql_user} -p${Mysql_passwd} -e 'select @@log_bin;'|tr -s "\n" " " >> ${Mysql_log_file}
        if [[   $(cat ${Mysql_log_file} | sed -rn 's/^@@log_bin .*([0-9])/\1/p') -eq 0 ]];then
            mysql -u${Mysql_user} -p${Mysql_passwd} -e "set sql_log_bin=1;"
            sleep 10
        fi
            sleep 10
            mysql -u${Mysql_user} -p${Mysql_passwd} -e "create user ${Replication_user}@'${Allow_segment}%' identified by '${Replication_passwd}';" 
            sleep 5
            mysql -u${Mysql_user} -p${Mysql_passwd} -e 'select user from mysql.user;' |grep "${Replication_user}" && \
            mysql -u${Mysql_user} -p${Mysql_passwd} -e "grant replication slave on *.* to ${Replication_user}@${Allow_segment}%;"
        
}


#备份主端数据,并拷贝至对端
function Backup() {
    #备份mysql数据库并生成新的bin-log
        mysqldump -u${Mysql_user} -p${Mysql_passwd} -A -F  --master-data=1 --single-transaction > /date/Replication${Backup_time}.sql
        [ -f /date/Replication${Backup_time}.sql ] && \
        sed -ri 's/^-- (CHANGE.*)/\1/'   /date/Replication${Backup_time}.sql && \
        sed -ri 's/^(CHANGE MASTER TO )(.*)/\1\n\2/' /date/Replication${Backup_time}.sql && \
        sed -ri "/^CHANGE /a\MASTER_HOST='${Master_ipddr}',"  /date/Replication${Backup_time}.sql && \
        sed -ri "/^MASTER_HOST/a\MASTER_USER='${Replication_user}',"  /date/Replication${Backup_time}.sql && \
        sed -ri "/^MASTER_USER/a\MASTER_PASSWORD='${Replication_passwd}'," /date/Replication${Backup_time}.sql && \
        sed -ri "/^MASTER_PASSWORD/a\MASTER_PORT=${Replication_port}," /date/Replication${Backup_time}.sql && \
        grep -En '^CHANGE|^MASTER' /date/Replication${Backup_time}.sql |sed -r "/MASTER TO/i\ Replication configuration :'${Backup_time}'" >> ${Mysql_log_file}
}

#配置slver的mysql配置文件,并完成mysql备份导入操作;
function Slave_Change_config() {
        #生成对端执行脚本
        tee /date/Slave_Change_config.sh<<EOF
        ss -ntlp |grep 'mysqld' || systemctl start mysqld.service || systemctl start mariadb.service
        grep 'log-bin=' ${Slave_path} 2>/dev/null || sed -ri.bak '/\\[mysqld\\]/a\log-bin' ${Slave_path}
        sed -ri.bak '/\\[mysqld\\]/a\\server-id=192'  ${Slave_path} && \\
        sed -ri '/\\[mysqld\\]/a\\read-only=ON' ${Slave_path} && \\
        mysql -u${Slave_user} -e 'set sql_log_bin=0;'
        [ -f /root/Replication${Backup_time}.sql ] && \\
        mysql -u${Slave_user} -e 'source /root/Replication${Backup_time}.sql' && \\
        systemctl restart  mysqld.service || systemctl restart mariadb.service
        mysql -u${Slave_user} -p'${Mysql_passwd}' -e  'show slave status\G' |grep 'MASTER' && \\
        mysql -u${Slave_user} -p'${Mysql_passwd}' -e  'start slave;'
        mysql -u${Slave_user} -p'${Mysql_passwd}' -e  'show processlist;'  |grep 'waiting for the slave' && \\
        echo "Configuration is successful" 
EOF
        #通过scp传至对端,执行脚本,并回传信息；
            [ ! -e ${Slave_passwd} ] && \
            expect <<EOF
                set timeout 20
                spawn scp  /date/Replication${Backup_time}.sql /date/Slave_Change_config.sh  ${Slave_ipaddr}:/root
                    expect {
                        "yes/no" { send "yes\n";exp_continue }
                        "password" { send "${Slave_passwd}\n" }
                    }
                    expect eof
EOF
            sleep  10
            expect <<EOF
                set timeout 150
                spawn ssh ${Slave_ipaddr}
                    expect {
                        "yes/no" { send "yes\n";exp_continue }
                        "password" { send "${Slave_passwd}\n" }
                    }
                    expect "]" { send "touch /root/Slave_Change_config.log\n"}
                    expect "]" { send "sh /root/Slave_Change_config.sh &>/root/Slave_Change_config.log \n"}
                    expect "]" { send "sleep 100\n" }
                    expect "]" { send "scp /root/Slave_Change_config.log ${Master_ipddr}:/root\n" }
                    expect { 
                                "yes/no"  { send "yes\n";exp_continue }
                                "password" { send "${Master_passwd}\n" }
                            }
                    expect "]" { send "exit\n"}
                    expect eof
EOF
            grep "Configuration is successful" /root/Slave_Change_config.log && $color_green"配置完成"$color_end
           
}

#检查配置主端replication进程是否启动
function master_check(){
    mysql -u${Mysql_user} -p${Mysql_passwd} -e 'processlist;' |grep 'dump' &&\
    $color_green主从配置完成$color_end
}

PS3="请选择：(1-6):"
select MENU in  1 2 3 4 5 退出 ;do
case $REPLY in
1)
        Master_Change_config
        ;;
2)
        create_Replication_user
        ;;
3)
        Backup
        ;;
4)
        Slave_Change_config
        ;;
5)
        master_check
        ;;
6)
        exit
esac
done