1.ssh互信配置：
ssh-keygen -t rsa
ssh-copy-id -i .ssh/id_rsa.pub [email protected]

2.mysql复制配置参考：
https://blog.51cto.com/1937519/2283779

3.创建监控用户：
root@localhost 15:28: [(none)]>create user monitor@'%' identified by "monitor123";
Query OK, 0 rows affected (0.01 sec)

root@localhost 15:28: [(none)]>GRANT SELECT, RELOAD, SUPER, REPLICATION CLIENT ON . TO 'monitor'@'%';
Query OK, 0 rows affected (0.00 sec)

4.软件信息：
node下载：
https://github.com/yoshinorim/mha4mysql-node/releases/tag/v0.58
manager下载：
https://github.com/yoshinorim/mha4mysql-manager/releases/tag/v0.58
安装配置wiki参考：
https://github.com/yoshinorim/mha4mysql-manager/wiki

如果yum 安装提示：
No package perl-Log-Dispatch available.
No package perl-Parallel-ForkManager available.
则安装epel源方式:
yum install epel-release -y
然后在进行安装;

5.配置文件参考：
[root@db1 mysql]# cat /etc/masterha_default.cnf
[server default]
user=repl
password=MYsql#123
ssh_user=root
master_binlog_dir= /data/mysql/data
remote_workdir=/logs/mysql
#secondary_check_script= masterha_secondary_check -s master1 -s master2
#master_ip_failover_script=/usr/bin/scripts/master_ip_failover
#shutdown_script= /usr/bin/scripts/power_manager
#report_script= /usr/bin/scripts/send_master_failover_mail
#master_ip_online_change_script=/usr/bin/scripts/scripts/master_ip_online_change

cat /etc/masterha/app1.cnf
[server default]
manager_workdir=/logs/master/app1
manager_log=/logs/master/app1/manager.log
master_binlog_dir=/data/mysql/data
master_ip_failover_script=/logs/master/app1/master_ip_failover
master_ip_online_change_script=/logs/master/app1/master_ip_online_change
secondary_check_script= /usr/bin/masterha_secondary_check -s 192.168.56.202 -s 192.168.56.203 --user=root --master_host=192.168.56.201 --master_ip=192.168.56.201 --master_port=3306

user=monitor
password=monitor123
ping_interval=1
remote_workdir=/tmp
repl_user=repl
repl_password=MYsql#123
ssh_user=root

[server1]
hostname=192.168.56.201
ssh_port=22
port=3306
no_master=1

[server2]
hostname=192.168.56.202
ssh_port=22
port=3306
candidate_master=1
check_repl_delay=0

[server3]
hostname=192.168.56.203
ssh_port=22
port=3306

检查ssh：
masterha_check_ssh --conf=/etc/masterha/app1.cnf

检查复制：
masterha_check_repl --conf=/etc/masterha/app1.cnf

手动切换：
masterha_master_switch --conf=/etc/masterha/app1.cnf --master_state=alive --new_master_host=192.168.56.202 --new_master_port=3306 --orig_master_is_new_slave --running_updates_limit=10000

开启监控：
nohup masterha_manager --conf=/etc/masterha/app1.cnf --remove_dead_master_conf --ignore_last_failover < /dev/null > /logs/master/app1/manager.log 2>&1 &

查看状态：
masterha_check_status --conf=/etc/masterha/app1.cnf
app1 (pid:2841) is running(0:PING_OK), master:192.168.56.202

停止监控：
masterha_stop --conf=/etc/masterha/app1.cnf