MHA-手动Failover流程(传统复制&GTID复制)

本文仅梳理手动Failover流程。MHA的介绍详见：MySQL高可用架构之MHA

一、基本环境

1.1、复制结构

VMware10.0+CentOS6.9+MySQL5.7.21

ROLE	HOSTNAME	BASEDIR	DATADIR	IP	PORT
Node1	ZST1	/usr/local/mysql	/data/mysql/mysql3307/data	192.168.85.132	3307
Node2	ZST2	/usr/local/mysql	/data/mysql/mysql3307/data	192.168.85.133	3307
Node3	ZST3	/usr/local/mysql	/data/mysql/mysql3307/data	192.168.85.134	3307

传统复制基于Row+Position，GTID复制基于Row+Gtid搭建的一主两从复制结构：Node1->{Node2、Node3}

1.2、MHA配置文件

文中使用的MHA版本是0.56，并且在Node1、Node2、Node3全部安装manager、node包
MHA的配置文件如下

# 全局级配置文件：/etc/masterha/masterha_default.conf
[root@ZST1 masterha]# cat masterha_default.conf 
[server default]
#MySQL的用户和密码
user=mydba
password=mysql5721

#系统ssh用户
ssh_user=root

#复制用户
repl_user=repl
repl_password=repl

#监控
ping_interval=5
#shutdown_script=/etc/masterha/send_report.sh

#切换调用的脚本
master_ip_failover_script=/etc/masterha/master_ip_failover
master_ip_online_change_script=/etc/masterha/master_ip_online_change

log_level=debug
[root@ZST1 masterha]# 


# 集群1配置文件：/etc/masterha/app1.conf
[root@ZST1 masterha]# cat app1.conf 
[server default]
#mha manager工作目录
manager_workdir=/var/log/masterha/app1
manager_log=/var/log/masterha/app1/app1.log
remote_workdir=/var/log/masterha/app1

[server1]
hostname=192.168.85.132
port=3307
master_binlog_dir=/data/mysql/mysql3307/logs
candidate_master=1
check_repl_delay=0

[server2]
hostname=192.168.85.133
port=3307
master_binlog_dir=/data/mysql/mysql3307/logs
candidate_master=1
check_repl_delay=0

[server3]
hostname=192.168.85.134
port=3307
master_binlog_dir=/data/mysql/mysql3307/logs
candidate_master=1
check_repl_delay=0
[root@ZST1 masterha]#

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