同样在108和109节点依次执行如下命令

108：
ssh-keygen -t rsa
ssh-copy-id 192.168.146.107
ssh-copy-id 192.168.146.109

109：
ssh-keygen -t rsa
ssh-copy-id 192.168.146.107
ssh-copy-id 192.168.146.108

如下图所示

108：

109：

ssh 192.168.146.108

yum -y install epel-release
yum -y install perl-DBD-MySQL perl-DBI

#安装epel-release执行报错Error: Unable to find a match epel，百度之后说是少源，执行下边命令后正常
yum install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm

yum -y install ncftp

#执行如果报错Error: Unable to find a match ncftp，执行一下yum -y update，然后再次安装，如果还报错再手动编译安装ncftp
cd /home
wget https://www.ncftp.com/downloads/ncftp/ncftp-3.2.6-src.tar.gz
tar xvf ncftp-3.2.6-src.tar.gz
cd ncftp-3.2.6
./configure && make && make install

cd /home
wget https://qiniu.wsfnk.com/mha4mysql-node-0.58-0.el7.centos.noarch.rpm
rpm -ivh mha4mysql-node-0.58-0.el7.centos.noarch.rpm

mkdir /home/mysql_mha

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

#执行如果报错Error: Unable to find a match ，执行一下yum -y update，然后再次安装
wget https://qiniu.wsfnk.com/mha4mysql-manager-0.58-0.el7.centos.noarch.rpm
rpm -ivh mha4mysql-manager-0.58-0.el7.centos.noarch.rpm

mkdir /etc/mha

vim /etc/mha/mysql_mha.cnf
#内容如下
[server default]
#mha访问数据库的账号与密码
user=mha
password=ws-123456
#指定mha的工作目录
manager_workdir=/home/mysql_mha
#指定管理日志路径
manager_log=/home/mysql_mha/manager.log
#指定mha在远程节点上的工作目录
remote_workdir=/home/mysql_mha
#可以使用ssh登入的用户
ssh_user=root
ssh_port=22
#指定主从复制的mysq用户和密码
repl_user=repl
repl_password=ws-123456
#指定检测间隔时间
ping_interval=1
#指定master节点存放binlog的日志文件的目录
master_binlog_dir=/home/mysql/data
#指定一个脚本，该脚本实现了在主从切换之后，将虚拟ip漂移到新的master上
master_ip_failover_script=/usr/bin/master_ip_failover
#指定用于二次检查节点状态的节点
secondary_check_script=/usr/bin/masterha_secondary_check -s 192.168.146.107 -s 192.168.146.108 -s 192.168.146.109
#配置集群中的节点
[server1]
hostname=192.168.146.107
#指定该节点可以参与master选举
candidate_master=1

[server2]
hostname=192.168.146.108
candidate_master=1

[server3]
hostname=192.168.146.109
##指定该节点不参与master选举 该节点也是监控节点，所以关闭master候选
no_master=1

vim /usr/bin/master_ip_failover

#内容如下
#!/usr/bin/env perl

use strict;
use warnings FATAL => 'all';

use Getopt::Long;

my (
    $command, $orig_master_host, $orig_master_ip,$ssh_user,
    $orig_master_port, $new_master_host, $new_master_ip,$new_master_port,
    $orig_master_ssh_port,$new_master_ssh_port,$new_master_user,$new_master_password
);

# 这里定义的虚拟IP可以根据实际情况进行修改
my $vip = '192.168.146.106/24';
my $key = '1';

# 这里的网卡名称 “ens160” 需要根据你机器的网卡名称进行修改
my $ssh_start_vip = "/sbin/ifconfig ens160:$key $vip";
my $ssh_stop_vip = "/sbin/ifconfig ens160:$key down";
my $ssh_Bcast_arp= "/sbin/arping -I ens160 -c 3 -A 192.168.146.106";

GetOptions(
    'command=s'          => \$command,
    'ssh_user=s'         => \$ssh_user,
    'orig_master_host=s' => \$orig_master_host,
    'orig_master_ip=s'   => \$orig_master_ip,
    'orig_master_port=i' => \$orig_master_port,
    'orig_master_ssh_port=i' => \$orig_master_ssh_port,
    'new_master_host=s'  => \$new_master_host,
    'new_master_ip=s'    => \$new_master_ip,
    'new_master_port=i'  => \$new_master_port,
    'new_master_ssh_port' => \$new_master_ssh_port,
    'new_master_user' => \$new_master_user,
    'new_master_password' => \$new_master_password

);

exit &main();

sub main {
    $ssh_user = defined $ssh_user ? $ssh_user : 'root';
    print "\n\nIN SCRIPT TEST====$ssh_user|$ssh_stop_vip==$ssh_user|$ssh_start_vip===\n\n";

    if ( $command eq "stop" || $command eq "stopssh" ) {

        my $exit_code = 1;
        eval {
            print "Disabling the VIP on old master: $orig_master_host \n";
            &stop_vip();
            $exit_code = 0;
        };
        if ($@) {
            warn "Got Error: $@\n";
            exit $exit_code;
        }
        exit $exit_code;
    }
    elsif ( $command eq "start" ) {

        my $exit_code = 10;
        eval {
            print "Enabling the VIP - $vip on the new master - $new_master_host \n";
            &start_vip();
	    &start_arp();
            $exit_code = 0;
        };
        if ($@) {
            warn $@;
            exit $exit_code;
        }
        exit $exit_code;
    }
    elsif ( $command eq "status" ) {
        print "Checking the Status of the script.. OK \n";
        exit 0;
    }
    else {
        &usage();
        exit 1;
    }
}

sub start_vip() {
    `ssh $ssh_user\@$new_master_host \" $ssh_start_vip \"`;
}
sub stop_vip() {
    `ssh $ssh_user\@$orig_master_host \" $ssh_stop_vip \"`;
}

sub start_arp() {
    `ssh $ssh_user\@$new_master_host \" $ssh_Bcast_arp \"`;
}
sub usage {
    print
    "Usage: master_ip_failover --command=start|stop|stopssh|status --ssh_user=user --orig_master_host=host --orig_master_ip=ip --orig_master_port=port --new_master_host=host --new_master_ip=ip --new_master_port=port\n";
}

chmod a+x /usr/bin/master_ip_failover

masterha_check_ssh --conf=/etc/mha/mysql_mha.cnf

masterha_check_repl --conf=/etc/mha/mysql_mha.cnf

nohup masterha_manager --conf=/etc/mha/mysql_mha.cnf >/dev/null 2>/dev/null &
ps -ef|grep mha
#检测状态
masterha_check_status --conf=/etc/mha/mysql_mha.cnf 

#关闭mha
masterha_stop --conf=/etc/mha/mysql_mha.cnf 

tail -f /home/mysql_mha/manager.log