MHA-Atlas-MySQL高可用集群

2022-10-06 21:31:03

主机名映射

 
  1. [root@localhost ~]# cat /etc/hosts
  2. 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
  3. ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
  4. 192.168.200.20 mysql-db01
  5. 192.168.200.28 mysql-db02
  6. 192.168.200.29 mysql-db03
 

关闭selinux和iptables

 
  1. [root@mysql-db01 ~]# setenforce 0
  2. [root@mysql-db01 ~]# service iptables stop
  3. iptables: Setting chains to policy ACCEPT: filter [ OK ]
  4. iptables: Flushing firewall rules: [ OK ]
  5. iptables: Unloading modules: [ OK ]

安装（3台都装）

 
  1. [root@mysql-db01 ~]# yum -y install ncurses-devel
  2. [root@mysql-db01 ~]# yum -y install libaio
  3. [root@mysql-db01 ~]# tar xf mysql-5.6.17-linux-glibc2.5-x86_64.tar.gz -C /usr/local/
  4. [root@mysql-db01 ~]# ln -s /usr/local/mysql-5.6.17-linux-glibc2.5-x86_64 /usr/local/mysql
  5. [root@mysql-db01 ~]# useradd mysql -s /sbin/nologin -M
  6. [root@mysql-db01 ~]# /usr/local/mysql/scripts/mysql_install_db --user=mysql --basedir=/usr/local/mysql --datadir=/usr/local/mysql/data/
  7. [root@mysql-db01 ~]# /bin/cp /usr/local/mysql/support-files/my-default.cnf /etc/my.cnf
  8. [root@mysql-db01 ~]# /bin/cp /usr/local/mysql/support-files/mysql.server /etc/init.d/mysqld
  9. [root@mysql-db01 ~]# ln -s /usr/local/mysql/bin/* /usr/local/bin/
  10. [root@mysql-db01 ~]# which mysqladmin
  11. /usr/local/bin/mysqladmin
 

加入开机自启动并启动mysql

 
  1. [root@mysql-db01 ~]# chkconfig mysqld on
  2. [root@mysql-db01 ~]# chkconfig mysqld --list
  3. mysqld 0:off 1:off 2:on 3:on 4:on 5:on 6:off
  4. [root@mysql-db01 ~]# /etc/init.d/mysqld start
  5. Starting MySQL. SUCCESS!
  6. [root@mysql-db01 ~]# netstat -antup | grep mysql
  7. tcp 0 0 :::3306 :::* LISTEN 1258/mysqld
 

配置密码

 
  1. [root@mysql-db01 ~]# mysqladmin -uroot password '666666'

主库操作（mysql-db01）

 

修改配置文件

 
  1. #修改主库配置文件/etc/my.cnf
  2. [root@mysql-db01 mysql]# cat /etc/my.cnf
  3. [client]
  4. socket = /usr/local/mysql/data/mysql.sock
  5. [mysqld]
  6. lower_case_table_names = 1
  7. default-storage-engine = InnoDB
  8. port = 3306
  9. datadir = /usr/local/mysql/data
  10. character-set-server = utf8
  11. socket = /usr/local/mysql/data/mysql.sock
  12. log_bin = mysql-bin #开启binlog日志
  13. server_id = 1 #设置server_id
  14. innodb_buffer_pool_size = 200M
  15. slave-parallel-workers = 8
  16. thread_cache_size = 600
  17. back_log = 600
  18. slave_net_timeout = 60
  19. max_binlog_size = 512M
  20. key_buffer_size = 8M
  21. query_cache_size = 64M
  22. join_buffer_size = 2M
  23. sort_buffer_size = 2M
  24. query_cache_type = 1
  25. thread_stack = 192K
  26. #重启动MySQL服务
  27. [root@mysql-db01 mysql]# /etc/init.d/mysqld restart
  28. Shutting down MySQL.. SUCCESS!
  29. Starting MySQL. SUCCESS!

创建主从复制用户

 
  1. mysql> grant replication slave on *.* to rep@'192.168.200.%' identified by '666666';
  2. Query OK, 0 rows affected (0.01 sec)
  3. mysql> select user,host from mysql.user;
  4. +------+---------------+
  5. | user | host |
  6. +------+---------------+
  7. | root | 127.0.0.1 |
  8. | rep | 192.168.200.% |
  9. | root | ::1 |
  10. | | localhost |
  11. | root | localhost |
  12. | | mysql-db01 |
  13. | root | mysql-db01 |
  14. +------+---------------+
  15. 7 rows in set (0.00 sec)
  16. mysql> show grants for rep@'192.168.200.%';
  17. +----------------------------------------------------------------------------------------------------------------------------+
  18. | Grants for rep@192.168.200.% |
  19. +----------------------------------------------------------------------------------------------------------------------------+
  20. | GRANT REPLICATION SLAVE ON *.* TO 'rep'@'192.168.200.%' IDENTIFIED BY PASSWORD '*B2B366CA5C4697F31D4C55D61F0B17E70E5664EC' |
  21. +----------------------------------------------------------------------------------------------------------------------------+
  22. 1 row in set (0.00 sec)

从库操作(mysql-db02和mysql-db03)

 

修改配置文件

 
  1. #修改mysql-db02配置文件(和mysql-db01配置文件一致)
  2. #只需要修改server-id = 5选项
  3. [root@mysql-db02 ~]# cat /etc/my.cnf
  4. [client]
  5. socket = /usr/local/mysql/data/mysql.sock
  6. [mysqld]
  7. lower_case_table_names = 1
  8. default-storage-engine = InnoDB
  9. port = 3306
  10. datadir = /usr/local/mysql/data
  11. character-set-server = utf8
  12. socket = /usr/local/mysql/data/mysql.sock
  13. log_bin = mysql-bin #从binlog也要打开
  14. server_id = 5 #仅需修改此项
  15. innodb_buffer_pool_size = 200M
  16. slave-parallel-workers = 8
  17. thread_cache_size = 600
  18. back_log = 600
  19. slave_net_timeout = 60
  20. max_binlog_size = 512M
  21. key_buffer_size = 8M
  22. query_cache_size = 64M
  23. join_buffer_size = 2M
  24. sort_buffer_size = 2M
  25. query_cache_type = 1
  26. thread_stack = 192K
  27. [root@mysql-db02 ~]# /etc/init.d/mysqld restart #重启mysql
  28. Shutting down MySQL.. SUCCESS!
  29. Starting MySQL. SUCCESS!
    1. #修改mysql-db03配置文件(和mysql-db01配置文件一致)
    2. #只需要修改server-id = 10选项
    3. [root@mysql-db03 ~]# cat /etc/my.cnf
    4. [client]
    5. socket = /usr/local/mysql/data/mysql.sock
    6. [mysqld]
    7. lower_case_table_names = 1
    8. default-storage-engine = InnoDB
    9. port = 3306
    10. datadir = /usr/local/mysql/data
    11. character-set-server = utf8
    12. socket = /usr/local/mysql/data/mysql.sock
    13. log_bin = mysql-bin #从binlog也要打开
    14. server_id = 10 #只需修改此项
    15. innodb_buffer_pool_size = 200M
    16. slave-parallel-workers = 8
    17. thread_cache_size = 600
    18. back_log = 600
    19. slave_net_timeout = 60
    20. max_binlog_size = 512M
    21. key_buffer_size = 8M
    22. query_cache_size = 64M
    23. join_buffer_size = 2M
    24. sort_buffer_size = 2M
    25. query_cache_type = 1
    26. thread_stack = 192K
    27. [root@mysql-db03 ~]# /etc/init.d/mysqld restart #重启mysql
    28. Shutting down MySQL.. SUCCESS!
    29. Starting MySQL. SUCCESS!

开启GTID

 
  1. mysql> show global variables like '%gtid%'; #查看GTID是否开启
  2. +--------------------------+-------+
  3. | Variable_name | Value |
  4. +--------------------------+-------+
  5. | enforce_gtid_consistency | OFF |
  6. | gtid_executed | |
  7. | gtid_mode | OFF |
  8. | gtid_owned | |
  9. | gtid_purged | |
  10. +--------------------------+-------+
  11. 5 rows in set (0.07 sec) #没开启

编辑mysql配置文件（主库从库都需要修改） 
MHA-Atlas-MySQL高可用集群

再次查看GTID状态

 
  1. [root@mysql-db01 ~]# mysql -uroot -p666666
  2. Warning: Using a password on the command line interface can be insecure.
  3. Welcome to the MySQL monitor. Commands end with ; or \g.
  4. Your MySQL connection id is 1
  5. Server version: 5.6.17-log MySQL Community Server (GPL)
  6. Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
  7. Oracle is a registered trademark of Oracle Corporation and/or its
  8. affiliates. Other names may be trademarks of their respective
  9. owners.
  10. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
  11. mysql> show global variables like '%gtid%';
  12. +--------------------------+-------+
  13. | Variable_name | Value |
  14. +--------------------------+-------+
  15. | enforce_gtid_consistency | ON | # 执行GTID一致
  16. | gtid_executed | |
  17. | gtid_mode | ON | # 开启GTID模块
  18. | gtid_owned | |
  19. | gtid_purged | |
  20. +--------------------------+-------+
  21. 5 rows in set (0.00 sec)

开启从库的主从复制功能（mysql-db02,mysql-db03）

 
  1. mysql> start slave; #开启主从同步功能
  2. Query OK, 0 rows affected, 1 warning (0.01 sec)
  3. mysql> show slave status\G
  4. *************************** 1. row ***************************
  5. Slave_IO_State: Waiting for master to send event
  6. Master_Host: 192.168.0.51
  7. Master_User: rep
  8. Master_Port: 3306
  9. Connect_Retry: 60
  10. Master_Log_File: mysql-bin.000003
  11. Read_Master_Log_Pos: 151
  12. Relay_Log_File: mysql-db02-relay-bin.000002
  13. Relay_Log_Pos: 361
  14. Relay_Master_Log_File: mysql-bin.000003
  15. Slave_IO_Running: Yes #此项yes代表成功
  16. Slave_SQL_Running: Yes #此项yes代表成功
  17. Replicate_Do_DB:
  18. Replicate_Ignore_DB:
  19. Replicate_Do_Table:
  20. Replicate_Ignore_Table:
  21. #....以下省略若干行....

因为MHA需要relaylog日志，但是mysql会自动删除relaylog日志，所以需要关闭自动删除

 
  1. #登陆从库
  2. [root@mysql-db02 ~]# mysql -uroot -p123123
  4. #临时禁用自动删除relay log功能
  5. mysql> set global relay_log_purge = 0;
  6. Query OK, 0 rows affected (0.00 sec)
  8. #设置只读
  9. mysql> set global read_only=1;
  10. Query OK, 0 rows affected (0.00 sec)

编辑配置文件/etc/my.cof 
MHA-Atlas-MySQL高可用集群

修改配置文件必须重启服务 
/etc/init.d/mysqld restart

部署MHA

 

环境准备（所有节点mysql-01，mysql-02，mysql-03）

 
  1. #光盘安装依赖包
  2. [root@mysql-db01 ~]# yum -y install perl-DBD-MySQL
  3. #安装mha4mysql-node-0.56-0.el6.noarch.rpm
  4. [root@mysql-db01 rpm]# rpm -ivh mha4mysql-node-0.56-0.el6.noarch.rpm
  5. Preparing... ########################################### [100%]
  6. 1:mha4mysql-node ########################################### [100%]
  7. [root@mysql-db01 rpm]# mysql -uroot -p666666
  8. Warning: Using a password on the command line interface can be insecure.
  9. Welcome to the MySQL monitor. Commands end with ; or \g.
  10. Your MySQL connection id is 3
  11. Server version: 5.6.17-log MySQL Community Server (GPL)
  12. Copyright (c) 2000, 2014, Oracle and/or its affiliates. All rights reserved.
  13. Oracle is a registered trademark of Oracle Corporation and/or its
  14. affiliates. Other names may be trademarks of their respective
  15. owners.
  16. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
  17. mysql> grant all privileges on *.* to mha@'192.168.200.%' identified by '666666';
  18. Query OK, 0 rows affected (0.12 sec)
  19. mysql> select user,host from mysql.user where user='mha';
  20. +------+---------------+
  21. | user | host |
  22. +------+---------------+
  23. | mha | 192.168.200.% | #主库上创建从库自动复制
  24. +------+---------------+
  25. 1 row in set (0.10 sec)
  26. # 3台MsQL都需要安装mha4mysql-node-0.56-0.el6.noarch.rpm

部署管理节点（mha-manager）

 

在mysql-db03上部署管理节点

 
  1. #使用阿里云源+epel源
  2. wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-6.repo
  3. wget -O /etc/yum.repos.d/epel-6.repo http://mirrors.aliyun.com/repo/epel-6.repo
  4. #安装manager依赖包（需要公网源）
  5. [root@mysql-db03 ~]# yum -y install perl-Config-Tiny epel-release perl-Log-Dispatch perl-Parallel-ForkManager perl-Time-HiRes
  6. #安装manager包
  7. [root@mysql-db03 rpm]# rpm -ivh mha4mysql-manager-0.56-0.el6.noarch.rpm
  8. Preparing... ########################################### [100%]
  9. 1:mha4mysql-manager ########################################### [100%]

编辑配置文件

 
  1. #创建配置文件目录
  2. [root@mysql-db03 ~]# mkdir -p /etc/mha
  3. #创建日志目录
  4. [root@mysql-db03 ~]# mkdir -p /var/log/mha/mha1
  5. #创建配置文件（默认没有）
  6. [root@mysql-db03 ~]# cd /etc/mha/
  7. [root@mysql-db03 mha]# ls
  8. [root@mysql-db03 mha]# vim /etc/mha/mha1.cnf
  9. [root@mysql-db03 mha]# cat /etc/mha/mha1.cnf
  10. [server default]
  11. manager_log=/var/log/mha/mha1/manager #manager管理日志存放路径
  12. manager_workdir=/var/log/mha/mha1 #manager管理日志的目录路径
  13. master_binlog_dir=/usr/local/mysql/data #binlog日志的存放路径
  14. user=mha #管理账户
  15. password=123123 #管理账户密码
  16. ping_interval=2 #存活检查的间隔时间
  17. repl_user=rep #主从复制的授权账户
  18. repl_password=123123 #主从复制的授权账户密码
  19. ssh_user=root #用于ssh连接的账户
  20. [server1]
  21. hostname=192.168.0.51
  22. port=3306
  23. [server2]
  24. #candidate_master=1 #此条暂时注释掉（后面解释）
  25. #check_repl_delay=0 #此条暂时注释掉（后面解释）
  26. hostname=192.168.0.52
  27. port=3306
  28. [server3]
  29. hostname=192.168.0.53
  30. port=3306

配置ssh信任（所有节点mysql-db01,mysql-db02,mysql-db03）

 
  1. #创建秘钥对，三个都创建，因为要互相免密码登录
  2. [root@mysql-db03 ~]# ssh-keygen -t dsa -P "" -f ~/.ssh/id_dsa
  3. #发送mysql-db03公钥，包括自己
  4. [root@mysql-db03 ~]# ssh-copy-id -i /root/.ssh/id_dsa.pub root@192.168.200.20
  5. [root@mysql-db03 ~]# ssh-copy-id -i /root/.ssh/id_dsa.pub root@192.168.200.28
  6. [root@mysql-db03 ~]# ssh-copy-id -i /root/.ssh/id_dsa.pub root@192.168.200.29
  7. #发送mysql-db02公钥，包括自己
  8. [root@mysql-db02 ~]# ssh-copy-id -i /root/.ssh/id_dsa.pub root@192.168.200.20
  9. [root@mysql-db02 ~]# ssh-copy-id -i /root/.ssh/id_dsa.pub root@192.168.200.28
  10. [root@mysql-db02 ~]# ssh-copy-id -i /root/.ssh/id_dsa.pub root@192.168.200.29
  11. #发送mysql-db01公钥，包括自己
  12. [root@mysql-db01 ~]# ssh-copy-id -i /root/.ssh/id_dsa.pub root@192.168.200.20
  13. [root@mysql-db01 ~]# ssh-copy-id -i /root/.ssh/id_dsa.pub root@192.168.200.28
  14. [root@mysql-db01 ~]# ssh-copy-id -i /root/.ssh/id_dsa.pub root@192.168.200.29

启动测试

 

ssh检查检测

 
  1. [root@mysql-db03 mha]# masterha_check_ssh --conf=/etc/mha/mha1.cnf #ssh检查命令
  2. Sat Nov 24 06:21:45 2018 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping.
  3. Sat Nov 24 06:21:45 2018 - [info] Reading application default configuration from /etc/mha/mha1.cnf..
  4. Sat Nov 24 06:21:45 2018 - [info] Reading server configuration from /etc/mha/mha1.cnf..
  5. Sat Nov 24 06:21:45 2018 - [info] Starting SSH connection tests..
  6. Sat Nov 24 06:21:46 2018 - [debug]
  7. Sat Nov 24 06:21:45 2018 - [debug] Connecting via SSH from root@192.168.200.20(192.168.200.20:22) to root@192.168.200.28(192.168.200.28:22)..
  8. Sat Nov 24 06:21:45 2018 - [debug] ok.
  9. Sat Nov 24 06:21:45 2018 - [debug] Connecting via SSH from root@192.168.200.20(192.168.200.20:22) to root@192.168.200.29(192.168.200.29:22)..
  10. Sat Nov 24 06:21:45 2018 - [debug] ok.
  11. Sat Nov 24 06:21:47 2018 - [debug]
  12. Sat Nov 24 06:21:46 2018 - [debug] Connecting via SSH from root@192.168.200.29(192.168.200.29:22) to root@192.168.200.20(192.168.200.20:22)..
  13. Sat Nov 24 06:21:46 2018 - [debug] ok.
  14. Sat Nov 24 06:21:46 2018 - [debug] Connecting via SSH from root@192.168.200.29(192.168.200.29:22) to root@192.168.200.28(192.168.200.28:22)..
  15. Sat Nov 24 06:21:47 2018 - [debug] ok.
  16. Sat Nov 24 06:21:47 2018 - [debug]
  17. Sat Nov 24 06:21:45 2018 - [debug] Connecting via SSH from root@192.168.200.28(192.168.200.28:22) to root@192.168.200.20(192.168.200.20:22)..
  18. Sat Nov 24 06:21:46 2018 - [debug] ok.
  19. Sat Nov 24 06:21:46 2018 - [debug] Connecting via SSH from root@192.168.200.28(192.168.200.28:22) to root@192.168.200.29(192.168.200.29:22)..
  20. Sat Nov 24 06:21:46 2018 - [debug] ok.
  21. Sat Nov 24 06:21:47 2018 - [info] All SSH connection tests passed successfully. #出现这个就表示成功

主从复制检查

（1）错误的主从复制检测 
[root@mysql-db03 ~]# masterha_check_repl --conf=/etc/mha/mha1.cnf 
如果出现下面的情况 
MHA-Atlas-MySQL高可用集群

因此在mysql-db02和mysql-db03上添加主从复制的用户即可。 
grant replication slave on *.* to rep@'192.168.200.%' identified by '666666'; 
再次检查

MHA-Atlas-MySQL高可用集群

启动MHA

 
  1. #启动
  2. [root@mysql-db03 ~]# nohup masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover < /dev/null > /var/log/mha/mha1/manager.log 2>&1 & #启动后按几次回车，不退出就是没问题。
  3. [root@mysql-db03 ~]# ps -ef | grep perl | grep -v grep
  4. root 5585 2925 0 09:23 pts/1 00:00:00 perl /usr/bin/masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover

（1）登陆mysql-db02(192.168.200.28)查看信息状态

 
  1. #登陆数据库mysql-db02(192.168.200.28)
  2. [root@mysql-db03 ~]# mysql -uroot -p666666
  3. mysql> show slave status\G
  4. *************************** 1. row ***************************
  5. Slave_IO_State: Waiting for master to send event
  6. Master_Host: 192.168.200.20 #这是主库IP地址
  7. Master_User: rep
  8. Master_Port: 3306
  9. Connect_Retry: 60
  10. Master_Log_File: mysql-bin.000003
  11. Read_Master_Log_Pos: 1656
  12. Relay_Log_File: mysql-db02-relay-bin.000004
  13. Relay_Log_Pos: 1796
  14. Relay_Master_Log_File: mysql-bin.000003
  15. Slave_IO_Running: Yes
  16. Slave_SQL_Running: Yes
  17. ..以下省略若干内容..

（2）停掉mysql-db01(192.168.200.20)上的MySQL服务

 
  1. [root@localhost rpm]# /etc/init.d/mysqld stop
  2. Shutting down MySQL...... SUCCESS!

（3）查看mysql-db03上的MySQL从库同步状态

 
  1. [root@localhost mha]# mysql -uroot -p666666 -e 'show slave status\G'
  2. Warning: Using a password on the command line interface can be insecure.
  3. *************************** 1. row ***************************
  4. Slave_IO_State: Waiting for master to send event
  5. Master_Host: 192.168.200.28 #现在的主库IP
  6. Master_User: rep
  7. Master_Port: 3306
  8. Connect_Retry: 60
  9. Master_Log_File: mysql-bin.000003 #binlog日志
  10. Read_Master_Log_Pos: 662 #binlog日志位置
  11. Relay_Log_File: localhost-relay-bin.000002
  12. Relay_Log_Pos: 665
  13. Relay_Master_Log_File: mysql-bin.000003
  14. Slave_IO_Running: Yes
  15. Slave_SQL_Running: Yes
  16. ..以下省略若干内容..

（4）查看mysql-db02上的MySQL，主库同步状态。 
MHA-Atlas-MySQL高可用集群

5）查看mysql-db03上的mha进程状态

 
  1. [root@mysql-db03 ~]# ps -ef | grep perl | grep -v grep #查询发现mha进程已经没了
  2. [root@mysql-db03 ~]#

（6）查看mha配置文件信息 
MHA-Atlas-MySQL高可用集群

进行mha的故障还原测试

（1）将故障宕机的mysql-db01的MySQL服务启动并授权进行从同步

 
  1. [root@mysql-db01 ~]# /etc/init.d/mysqld start
  2. Starting MySQL. SUCCESS!
  3. [root@mysql-db01 ~]# mysql -uroot -p666666
  4. mysql> CHANGE MASTER TO MASTER_HOST='192.168.200.28', MASTER_PORT=3306, MASTER_AUTO_POSITION=1, MASTER_USER='rep', MASTER_PASSWORD='666666';

（2）将mha配置文件里缺失的部分补全

 
  1. [root@localhost mha]# cat /etc/mha/mha1.cnf
  2. [server default]
  3. manager_log=/var/log/mha/mha1/manager
  4. manager_workdir=/var/log/mha/mha1
  5. master_binlog_dir=/usr/local/mysql/data
  6. password=666666
  7. ping_interval=2
  8. repl_password=666666
  9. repl_user=rep
  10. ssh_user=root
  11. user=mha
  12. [server1]
  13. hostname=192.168.200.20
  14. port=3306
  15. [server2]
  16. hostname=192.168.200.28
  17. port=3306
  18. [server3]
  19. hostname=192.168.200.29
  20. port=3306

（3）启动mha进程

 
  1. [root@mysql-db03 ~]# nohup masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover < /dev/null > /var/log/mha/mha1/manager.log 2>&1 &
  2. [root@localhost mha]# ps -ef |grep perl
  3. root 4541 934 0 23:39 pts/0 00:00:00 perl /usr/bin/masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover

（4）停掉mysql-db02上的MySQL服务

 
  1. [root@localhost ~]# /etc/init.d/mysqld stop
  2. Shutting down MySQL...... SUCCESS!

（5）查看mysql-db03上的主从同步状态： 
MHA-Atlas-MySQL高可用集群 
（6）启动mysql-db02上的MySQL服务

 
    1. [root@mysql-db02 ~]# /etc/init.d/mysqld start
    2. Starting MySQL. SUCCESS!
    3. [root@mysql-db02 ~]# mysql -uroot -p666666
    4. mysql> CHANGE MASTER TO MASTER_HOST='192.168.200.20', MASTER_PORT=3306, MASTER_AUTO_POSITION=1, MASTER_USER='rep', MASTER_PASSWORD='666666';
    5. mysql> start slave;
    6. mysql> show slave status\G #查看从同步状态

（7）再次补全mha配置文件后，启动mha进程

 
  1. [root@localhost mha]# cat /etc/mha/mha1.cnf
  2. [server default]
  3. manager_log=/var/log/mha/mha1/manager
  4. manager_workdir=/var/log/mha/mha1
  5. master_binlog_dir=/usr/local/mysql/data
  6. password=666666
  7. ping_interval=2
  8. repl_password=666666
  9. repl_user=rep
  10. ssh_user=root
  11. user=mha
  12. [server1]
  13. hostname=192.168.200.20
  14. port=3306
  15. [server2]
  16. hostname=192.168.200.28
  17. port=3306
  18. [server3]
  19. hostname=192.168.200.29
  20. port=3306
  21. [root@mysql-db03 ~]# nohup masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover < /dev/null > /var/log/mha/mha1/manager.log 2>&1 &
  22. [root@localhost mha]# ps -ef | grep perl | grep -v grep
  23. root 5027 934 0 Nov24 pts/0 00:00:00 perl /usr/bin/masterha_manager --conf=/etc/mha/mha1.cnf --remove_dead_master_conf --ignore_last_failover
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