mariadb高可用MHA搭建

一、ssh免密登录

所有节点配置hosts
        192.168.115.128    mgt
        192.168.115.130    master
        192.168.115.131    slave1
        192.168.115.132    slave2
    192.168.115.128
        ssh-keygen
        for i in 130 131 132;do ssh-copy-id root@192.168.115.$i;done
    192.168.115.130
        ssh-keygen
        for i in 128 131 132;do ssh-copy-id root@192.168.115.$i;done
    192.168.115.131
        ssh-keygen
        for i in 130 128 132;do ssh-copy-id root@192.168.115.$i;done
    192.168.115.132
        ssh-keygen
        for i in 130 131 128;do ssh-copy-id root@192.168.115.$i;done
    测试
        for i in 128 130 131;do ssh 192.168.115.$i hostname;done

二、配置MySQL主从复制

我们以130，131，132三台虚拟机为主从服务器

配置主从复制
        master
            vim  /etc/my.cnf
            [mysqld]
server-id = 20
log-bin = master-bin
log-slave-updates = true
            systemctl restart mariadb
            mysql -e "grant replication slave on *.* to 'myslave'@'192.168.115.%' identified by '123.com';"
mysql -e "grant all privileges on *.* to 'mha'@'192.168.115.%' identified by '123.com';"
mysql -e "grant all privileges on *.* to 'mha'@'192.168.115.128' identified by '123.com';"
mysql -e "grant all privileges on *.* to 'mha'@'192.168.115.131' identified by '123.com';"
mysql -e "grant all privileges on *.* to 'mha'@'192.168.115.132' identified by '123.com';"

            mysql -e "show master status";
        slave
            server-id=30
log-bin=master-bin
relay-log=relay-log-bin
relay-log-index=relay-log-bin.index

            mysql -e "grant replication slave on *.* to 'myslave'@'192.168.115.%' identified by '123.com';"
mysql -e "grant all privileges on *.* to 'mha'@'192.168.115.%' identified by '123.com';"
mysql -e "grant all privileges on *.* to 'mha'@'192.168.115.128' identified by '123.com';"
mysql -e "grant all privileges on *.* to 'mha'@'192.168.115.131' identified by '123.com';"
mysql -e "grant all privileges on *.* to 'mha'@'192.168.115.132' identified by '123.com';"
            mysql -e "change master to master_host='192.168.115.130',master_
user='myslave',master_password='123.com',master_log_file='master-bin.000003',master_log_pos=1166;"
        验证
            master
                mysql -e "create database jx;"
            slave
                mysql -e "show databases；"

三、安装MHA

在所有节点安装perl环境

yum install epel-release -y
    yum -y install perl-DBD-MySQL perl-ExtUtils-MakeMaker perl-Config-Tiny perl-Log-Dispatch perl-Parallel-ForkManager perl-Time-HiRes perl-CPAN

所有节点安装node
    tar xf mha4mysql-node-0.57.tar.gz
    cd mha4mysql-node-0.57
    perl Makefile.PL && make && make install

验证
    /usr/local/bin下可以看到脚本

 我们把128的虚拟机设置为mha，安装 manager