作业一

要求: 画出实验拓扑图，标准清楚IP/hostname/作用
（1）实现1主2从GTID主从复制环境
（2）构建MHA高可用环境 30分
（3）模拟损坏主库，并实现修复 10分
（4）实现应用透明（VIP） 20分
（5）实现外部数据补偿（binlog server） 10分
（6）基于MHA环境实现Atlas读写分离 20分
（7）在线增加删除节点管理Atlas 10分

实验步骤

1、安装GITD主从复制环境

1.1 编写配置文件

1.编写master主机配置文件(172.16.1.51)
[root@db01 ~]# cat /etc/my.cnf
[mysqld]
basedir=/application/mysql
datadir=/application/mysql/data
socket=/application/mysql/tmp/mysql.sock
log-error=/var/log/mysql.log
log_bin=/data/binlog/mysql-bin
binlog_format=row
skip-name-resolve
server-id=51
gtid-mode=on
enforce-gtid-consistency=true
log-slave-updates=1
[client]
socket=/application/mysql/tmp/mysql.sock
[root@db01 ~]# 
2.编写slave1主机配置文件(172.16.1.52)
[root@db02 ~]# cat /etc/my.cnf
[mysqld]
basedir=/application/mysql
datadir=/application/mysql/data
server_id=52
socket=/application/mysql/tmp/mysql.sock
log-error=/var/log/mysql.log
log_bin=/data/binlog/mysql-bin
binlog_format=row
skip-name-resolve
gtid-mode=on
enforce-gtid-consistency=true
log-slave-updates=1
[client]
socket=/application/mysql/tmp/mysql.sock
3.编写slave1主机配置文件(172.16.1.53)
[root@db03 ~]# vim /etc/my.cnf
[mysqld]
basedir=/application/mysql
datadir=/application/mysql/data
server_id=53
socket=/application/mysql/tmp/mysql.sock
log-error=/var/log/mysql.log
log_bin=/data/binlog/mysql-bin
binlog_format=row
skip-name-resolve
gtid-mode=on
enforce-gtid-consistency=true
log-slave-updates=1
[client]
socket=/application/mysql/tmp/mysql.sock
4.重启数据库
/etc/init.d/mysqld restart

1.2 配置复制环境

1.在master主库上配置(51)
grant replication slave  on *.* to repl@'172.16.1.%' identified by '123';
2.在从库上配置(5152)
change master to master_host='172.16.1.51',master_user='repl',master_password='123' ,MASTER_AUTO_POSITION=1;
3.启动slave
start slave;
4.查看从库状态
show slave statusG

1.3 测试GTID环境

1.在主库上新建数据库
create database oldboy;
2.在从库上查看有没有复制成功
mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| oldboy             |
| performance_schema |
| test               |
+--------------------+
5 rows in set (0.01 sec)

2.搭建mha环境

2.1 在/etc/my.cnf配置文件中添加(每个节点都要添加)

relay_log_purge=0 #保留mysql中relay_log
每个节点都需要做好解析
172.16.1.51 db01
172.16.1.52 db02
172.16.1.53 db03

2.2 各个节点安装mha node

mha下载地址：https://github.com/yoshinorim/mha4mysql-manager/releases
每个点都需要进行安装mha-node
yum -y install mha4mysql-node-0.58-0.el7.centos.noarch.rpm

2.3 在主库上新建mha管理用户

grant all privileges on *.* to mha@'172.16.1.%' identified by 'mha';

2.4 配置软件链接

ln -s /application/mysql/bin/mysqlbinlog /usr/bin/mysqlbinlog
ln -s /application/mysql/bin/mysql /usr/bin/mysql

2.5 部署manage节点(生产环境一般拿多一台服务器做manage节点，此处使用db03)

yum -y install mha4mysql-manager-0.58-0.el7.centos.noarch.rpm

2.6 创建manage目录与配置文件

mkdir -p /etc/mha
mkdir -p /var/log/mha/app1    ----》可以管理多套主从复制
vim /etc/mha/app1.cnf 
[server default]
manager_log=/var/log/mha/app1/manager
manager_workdir=/var/log/mha/app1
master_binlog_dir=/data/binlog
user=mha
password=mha
ping_interval=2
repl_password=123
repl_user=repl
ssh_user=root
[server1]
hostname=172.16.1.51
port=3306
[server2]
hostname=172.16.1.52
port=3306
[server3]
hostname=172.16.1.53
port=3306

2.7配置各节点ssh互信

ssh-keygen -t dsa -P '' -f ~/.ssh/id_dsa >/dev/null 2>&1
ssh-copy-id -i /root/.ssh/id_dsa.pub root@172.16.1.51
ssh-copy-id -i /root/.ssh/id_dsa.pub root@172.16.1.52
ssh-copy-id -i /root/.ssh/id_dsa.pub root@172.16.1.53

2.8 检查互信

[root@db03 tools]# masterha_check_ssh --conf=/etc/mha/app1.cnf
Tue Apr 30 20:04:52 2019 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping
.Tue Apr 30 20:04:52 2019 - [info] Reading application default configuration from /etc/mha/app1.cnf..
Tue Apr 30 20:04:52 2019 - [info] Reading server configuration from /etc/mha/app1.cnf..
Tue Apr 30 20:04:52 2019 - [info] Starting SSH connection tests..
Tue Apr 30 20:04:53 2019 - [debug] 
Tue Apr 30 20:04:52 2019 - [debug]  Connecting via SSH from root@172.16.1.51(172.16.1.51:22) to root@172.16.
1.52(172.16.1.52:22)..Tue Apr 30 20:04:52 2019 - [debug]   ok.
Tue Apr 30 20:04:52 2019 - [debug]  Connecting via SSH from root@172.16.1.51(172.16.1.51:22) to root@172.16.
1.53(172.16.1.53:22)..Tue Apr 30 20:04:53 2019 - [debug]   ok.
Tue Apr 30 20:04:53 2019 - [debug] 
Tue Apr 30 20:04:52 2019 - [debug]  Connecting via SSH from root@172.16.1.52(172.16.1.52:22) to root@172.16.
1.51(172.16.1.51:22)..Tue Apr 30 20:04:53 2019 - [debug]   ok.
Tue Apr 30 20:04:53 2019 - [debug]  Connecting via SSH from root@172.16.1.52(172.16.1.52:22) to root@172.16.
1.53(172.16.1.53:22)..Tue Apr 30 20:04:53 2019 - [debug]   ok.
Tue Apr 30 20:04:53 2019 - [error][/usr/share/perl5/vendor_perl/MHA/SSHCheck.pm, ln63] 
Tue Apr 30 20:04:53 2019 - [debug]  Connecting via SSH from root@172.16.1.53(172.16.1.53:22) to root@172.16.
1.51(172.16.1.51:22)..Warning: Permanently added '172.16.1.53' (ECDSA) to the list of known hosts.
Permission denied (publickey,password).
Tue Apr 30 20:04:53 2019 - [error][/usr/share/perl5/vendor_perl/MHA/SSHCheck.pm, ln111] SSH connection from 
root@172.16.1.53(172.16.1.53:22) to root@172.16.1.51(172.16.1.51:22) failed!SSH Configuration Check Failed!
 at /usr/bin/masterha_check_ssh line 44.
[root@db03 tools]# 

2.9 检查主从

[root@db03 tools]# masterha_check_ssh --conf=/etc/mha/app1.cnf
Tue Apr 30 20:04:52 2019 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping
.Tue Apr 30 20:04:52 2019 - [info] Reading application default configuration from /etc/mha/app1.cnf..
Tue Apr 30 20:04:52 2019 - [info] Reading server configuration from /etc/mha/app1.cnf..
Tue Apr 30 20:04:52 2019 - [info] Starting SSH connection tests..
Tue Apr 30 20:04:53 2019 - [debug] 
Tue Apr 30 20:04:52 2019 - [debug]  Connecting via SSH from root@172.16.1.51(172.16.1.51:22) to root@172.16.
1.52(172.16.1.52:22)..Tue Apr 30 20:04:52 2019 - [debug]   ok.
Tue Apr 30 20:04:52 2019 - [debug]  Connecting via SSH from root@172.16.1.51(172.16.1.51:22) to root@172.16.
1.53(172.16.1.53:22)..Tue Apr 30 20:04:53 2019 - [debug]   ok.
Tue Apr 30 20:04:53 2019 - [debug] 
Tue Apr 30 20:04:52 2019 - [debug]  Connecting via SSH from root@172.16.1.52(172.16.1.52:22) to root@172.16.
1.51(172.16.1.51:22)..Tue Apr 30 20:04:53 2019 - [debug]   ok.
Tue Apr 30 20:04:53 2019 - [debug]  Connecting via SSH from root@172.16.1.52(172.16.1.52:22) to root@172.16.
1.53(172.16.1.53:22)..Tue Apr 30 20:04:53 2019 - [debug]   ok.
Tue Apr 30 20:04:53 2019 - [error][/usr/share/perl5/vendor_perl/MHA/SSHCheck.pm, ln63] 
Tue Apr 30 20:04:53 2019 - [debug]  Connecting via SSH from root@172.16.1.53(172.16.1.53:22) to root@172.16.
1.51(172.16.1.51:22)..Warning: Permanently added '172.16.1.53' (ECDSA) to the list of known hosts.
Permission denied (publickey,password).
Tue Apr 30 20:04:53 2019 - [error][/usr/share/perl5/vendor_perl/MHA/SSHCheck.pm, ln111] SSH connection from 
root@172.16.1.53(172.16.1.53:22) to root@172.16.1.51(172.16.1.51:22) failed!SSH Configuration Check Failed!
 at /usr/bin/masterha_check_ssh line 44.
[root@db03 tools]# masterha_check_repl --conf=/etc/mha/app1.cnf
Tue Apr 30 20:05:38 2019 - [warning] Global configuration file /etc/masterha_default.cnf not found. Skipping
.Tue Apr 30 20:05:38 2019 - [info] Reading application default configuration from /etc/mha/app1.cnf..
Tue Apr 30 20:05:38 2019 - [info] Reading server configuration from /etc/mha/app1.cnf..
Tue Apr 30 20:05:38 2019 - [info] MHA::MasterMonitor version 0.58.
Tue Apr 30 20:05:40 2019 - [info] GTID failover mode = 1
Tue Apr 30 20:05:40 2019 - [info] Dead Servers:
Tue Apr 30 20:05:40 2019 - [info] Alive Servers:
Tue Apr 30 20:05:40 2019 - [info]   172.16.1.51(172.16.1.51:3306)
Tue Apr 30 20:05:40 2019 - [info]   172.16.1.52(172.16.1.52:3306)
Tue Apr 30 20:05:40 2019 - [info]   172.16.1.53(172.16.1.53:3306)
Tue Apr 30 20:05:40 2019 - [info] Alive Slaves:
Tue Apr 30 20:05:40 2019 - [info]   172.16.1.52(172.16.1.52:3306)  Version=5.6.43-log (oldest major version 
between slaves) log-bin:enabledTue Apr 30 20:05:40 2019 - [info]     GTID ON
Tue Apr 30 20:05:40 2019 - [info]     Replicating from 172.16.1.51(172.16.1.51:3306)
Tue Apr 30 20:05:40 2019 - [info]   172.16.1.53(172.16.1.53:3306)  Version=5.6.43-log (oldest major version 
between slaves) log-bin:enabledTue Apr 30 20:05:40 2019 - [info]     GTID ON
Tue Apr 30 20:05:40 2019 - [info]     Replicating from 172.16.1.51(172.16.1.51:3306)
Tue Apr 30 20:05:40 2019 - [info] Current Alive Master: 172.16.1.51(172.16.1.51:3306)
Tue Apr 30 20:05:40 2019 - [info] Checking slave configurations..
Tue Apr 30 20:05:40 2019 - [info]  read_only=1 is not set on slave 172.16.1.52(172.16.1.52:3306).
Tue Apr 30 20:05:40 2019 - [info]  read_only=1 is not set on slave 172.16.1.53(172.16.1.53:3306).
Tue Apr 30 20:05:40 2019 - [info] Checking replication filtering settings..
Tue Apr 30 20:05:40 2019 - [info]  binlog_do_db= , binlog_ignore_db= 
Tue Apr 30 20:05:40 2019 - [info]  Replication filtering check ok.
Tue Apr 30 20:05:40 2019 - [info] GTID (with auto-pos) is supported. Skipping all SSH and Node package check
ing.Tue Apr 30 20:05:40 2019 - [info] Checking SSH publickey authentication settings on the current master..
Tue Apr 30 20:05:40 2019 - [info] HealthCheck: SSH to 172.16.1.51 is reachable.
Tue Apr 30 20:05:40 2019 - [info] 
172.16.1.51(172.16.1.51:3306) (current master)
 +--172.16.1.52(172.16.1.52:3306)
 +--172.16.1.53(172.16.1.53:3306)

Tue Apr 30 20:05:40 2019 - [info] Checking replication health on 172.16.1.52..
Tue Apr 30 20:05:40 2019 - [info]  ok.
Tue Apr 30 20:05:40 2019 - [info] Checking replication health on 172.16.1.53..
Tue Apr 30 20:05:40 2019 - [info]  ok.
Tue Apr 30 20:05:40 2019 - [warning] master_ip_failover_script is not defined.
Tue Apr 30 20:05:40 2019 - [warning] shutdown_script is not defined.
Tue Apr 30 20:05:40 2019 - [info] Got exit code 0 (Not master dead).

MySQL Replication Health is OK.
[root@db03 tools]# 

2.10 启动mha

nohup masterha_manager --conf=/etc/mha/app1.cnf --remove_dead_master_conf --ignore_last_failover < /dev/null > /var/log/mha/app1/manager.log 2>&1 &

3.故障演练

3.1 宕掉主库(db01)

[root@db01 tools]# /etc/init.d/mysqld stop
Shutting down MySQL...... SUCCESS! 

3.2 查看mha日志

[root@db03 ~]# cat  /var/log/mha/app1/manager
......
 CHANGE MASTER TO MASTER_HOST='172.16.1.52', MASTER_PORT=3306, MASTER_AUTO_POSITION=1, MASTER_USER='repl', MASTER_PASSWORD='xxx'; #此处是恢复故障机的命令
......
----- Failover Report -----

app1: MySQL Master failover 172.16.1.51(172.16.1.51:3306) to 172.16.1.52(172.16.1.52:3306) succeeded

Master 172.16.1.51(172.16.1.51:3306) is down!

Check MHA Manager logs at db03:/var/log/mha/app1/manager for details.

Started automated(non-interactive) failover.
Selected 172.16.1.52(172.16.1.52:3306) as a new master.
172.16.1.52(172.16.1.52:3306): OK: Applying all logs succeeded.
172.16.1.53(172.16.1.53:3306): OK: Slave started, replicating from 172.16.1.52(172.16.1.52:3306)
172.16.1.52(172.16.1.52:3306): Resetting slave info succeeded.
Master failover to 172.16.1.52(172.16.1.52:3306) completed successfully. #此处表示已经成功切换到52这一台机器了

3.3 查看db03

mysql> show slave statusG
*************************** 1. row ***************************
               Slave_IO_State: Waiting for master to send event
                  Master_Host: 172.16.1.52 #已成功切换到db02
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000001
          Read_Master_Log_Pos: 805
               Relay_Log_File: db03-relay-bin.000002
                Relay_Log_Pos: 408
        Relay_Master_Log_File: mysql-bin.000001
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
              Replicate_Do_DB: 
          Replicate_Ignore_DB: 
           Replicate_Do_Table: 
       Replicate_Ignore_Table: 
      Replicate_Wild_Do_Table: 
  Replicate_Wild_Ignore_Table: 
                   Last_Errno: 0
                   Last_Error: 
                 Skip_Counter: 0
          Exec_Master_Log_Pos: 805
              Relay_Log_Space: 611
              Until_Condition: None
               Until_Log_File: 
                Until_Log_Pos: 0
           Master_SSL_Allowed: No
           Master_SSL_CA_File: 
           Master_SSL_CA_Path: 
              Master_SSL_Cert: 
            Master_SSL_Cipher: 
               Master_SSL_Key: 
        Seconds_Behind_Master: 0
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 0
                Last_IO_Error: 
               Last_SQL_Errno: 0
               Last_SQL_Error: 
  Replicate_Ignore_Server_Ids: 
             Master_Server_Id: 52
                  Master_UUID: 901b2d37-6af9-11e9-9c6c-000c29481d4a
             Master_Info_File: /application/mysql/data/master.info
                    SQL_Delay: 0
          SQL_Remaining_Delay: NULL
      Slave_SQL_Running_State: Slave has read all relay log; waiting for the slave I/O thread to update it
           Master_Retry_Count: 86400
                  Master_Bind: 
      Last_IO_Error_Timestamp: 
     Last_SQL_Error_Timestamp: 
               Master_SSL_Crl: 
           Master_SSL_Crlpath: 
           Retrieved_Gtid_Set: 
            Executed_Gtid_Set: fac6353b-6a35-11e9-9770-000c29c0e349:1-3
                Auto_Position: 1
1 row in set (0.00 sec)

3.3 恢复db01

1.在db01上，将db01重新加入到主从复制
[root@db01 tools]# /etc/init.d/mysqld start
CHANGE MASTER TO MASTER_HOST='172.16.1.52', MASTER_PORT=3306, MASTER_AUTO_POSITION=1, MASTER_USER='repl',MASTER_PASSWORD='123';
start slave
2.在mha配置文件中重新加入db01
[root@db03 tools]# vim /etc/mha/app1.cnf 
[server default]
......
[server1]
hostname=172.16.1.51
port=3306
......
3.启动MHA了manager程序
masterha_check_ssh  --conf=/etc/mha/app1.cnf 
masterha_check_ssh  --conf=/etc/mha/app1.cnf 
nohup masterha_manager --conf=/etc/mha/app1.cnf --remove_dead_master_conf --ignore_last_failover < /dev/null > /var/log/mha/app1/manager.log 2>&1 &

4.使用MHA自带脚本实现IP FailOver(vip 漂移，应用透明)

4.1 上传脚本

[root@db03 bin]# cat master_ip_failover 
#!/usr/bin/env perl

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

use Getopt::Long;

my (
    $command,          $ssh_user,        $orig_master_host, $orig_master_ip,
    $orig_master_port, $new_master_host, $new_master_ip,    $new_master_port
);

my $vip = '10.0.0.55/24';
my $key = '1';
my $ssh_start_vip = "/sbin/ifconfig eth1:$key $vip";
my $ssh_stop_vip = "/sbin/ifconfig eth1:$key down";

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,
    'new_master_host=s'  => $new_master_host,
    'new_master_ip=s'    => $new_master_ip,
    'new_master_port=i'  => $new_master_port,
);

exit &main();

sub main {

    print "

IN SCRIPT TEST====$ssh_stop_vip==$ssh_start_vip===

";

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

        my $exit_code = 1;
        eval {
            print "Disabling the VIP on old master: $orig_master_host 
";
            &stop_vip();
            $exit_code = 0;
        };
        if ($@) {
            warn "Got Error: $@
";
            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 
";
            &start_vip();
            $exit_code = 0;
        };
        if ($@) {
            warn $@;
            exit $exit_code;
        }
        exit $exit_code;
    }
    elsif ( $command eq "status" ) {
        print "Checking the Status of the script.. OK 
";
        exit 0;
    }
    else {
        &usage();
        exit 1;
    }
}

sub start_vip() {
    `ssh $ssh_user@$new_master_host " $ssh_start_vip "`;
}
sub stop_vip() {
     return 0  unless  ($ssh_user);
    `ssh $ssh_user@$orig_master_host " $ssh_stop_vip "`;
}

sub usage {
    print
    "Usage: master_ip_failover --command=start|stop|stopssh|status --orig_master_host=host --orig_master_ip=
ip --orig_master_port=port --new_master_host=host --new_master_ip=ip --new_master_port=port
";
[root@db03 bin]# dos2unix /usr/local/bin/master_ip_failover
[root@db03 bin]# chmod +x master_ip_failover

4.2 在mha配置文件中添加

[root@db03 bin]# vim /etc/mha/app1.cnf 
[server default]
......
master_ip_failover_script=/usr/local/bin/master_ip_failover
......

4.3 修改master_ip_failover配置文件

my $vip = '172.16.1.100/24';
my $key = '1';
my $ssh_start_vip = "/sbin/ifconfig eth1:$key $vip";
my $ssh_stop_vip = "/sbin/ifconfig eth1:$key down";

4.4 重启mha

masterha_stop --conf=/etc/mha/app1.cnf
nohup masterha_manager --conf=/etc/mha/app1.cnf --remove_dead_master_conf --ignore_last_failover < /dev/null > /var/log/mha/app1/manager.log 2>&1 &

4.5 手工在主库上绑定vip，注意一定要和配置文件中的ethN一致，我的是eth1:1(1是key指定的值)

ifconfig eth1:1 172.16.1.100/24 #如最小化安装没有ifconfig 命令则需要使用yum -y install net-tools安装
    [root@db02 tools]# ip a 
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:48:1d:54 brd ff:ff:ff:ff:ff:ff
    inet 172.16.1.52/24 brd 172.16.1.255 scope global eth1
       valid_lft forever preferred_lft forever
    inet 172.16.1.100/24 brd 172.16.1.255 scope global secondary eth1:1
       valid_lft forever preferred_lft forever

4.6 切换测试

停止主库
[root@db02 tools]# /etc/init.d/mysqld stop
Shutting down MySQL...... SUCCESS! 
此时发现vip已经在db01上了
[root@db01 tools]# ip a 
3: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:c0:e3:53 brd ff:ff:ff:ff:ff:ff
    inet 172.16.1.51/24 brd 172.16.1.255 scope global eth1
       valid_lft forever preferred_lft forever
    inet 172.16.1.100/24 brd 172.16.1.255 scope global secondary eth1:1
       valid_lft forever preferred_lft forever

4.7 恢复db02主从复制关系

mysql> CHANGE MASTER TO MASTER_HOST='172.16.1.51', MASTER_PORT=3306, MASTER_AUTO_POSITION=1, MASTER_USER='re
pl',MASTER_PASSWORD='123';
在mha配置文件中加入
[server2]
hostname=172.16.1.52
port=3306
启动mha

5.实现外部数据补偿(binlogserver配置)

生产环境中一般是找一台额外的机器，必须要有5.6以上的版本，支持gtid并开启，我们直接用的是db03

5.1 在mha配置文件中加入

[root@db03 bin]# vim /etc/mha/app1.cnf 

[server default]
manager_log=/var/log/mha/app1/manager
manager_workdir=/var/log/mha/app1
master_binlog_dir=/data/binlog
master_ip_failover_script=/usr/local/bin/master_ip_failover
password=mha
ping_interval=2
repl_password=123
repl_user=repl
ssh_user=root
user=mha

[server1]
hostname=172.16.1.51
port=3306

[server2]
hostname=172.16.1.52
port=3306

[binlog1]
no_master=1
hostname=172.16.1.53
master_binlog_dir=/data/mysql/binlog #提前创建好,这个目录不能和原有的binlog一致
mkdir -p /data/mysql/binlog
chown -R mysql.mysql /data/mysql/*

5.2 拉取主库binlog文件

cd /data/mysql/binlog  -----》必须进入到自己创建好的目录
mysqlbinlog  -R --host=172.16.1.51 --user=mha --password=mha --raw  --stop-never mysql-bin.000001 &

5.3 重启mha

masterha_stop --conf=/etc/mha/app1.cnf

nohup masterha_manager --conf=/etc/mha/app1.cnf --remove_dead_master_conf --ignore_last_failover < /dev/null > /var/log/mha/app1/manager.log 2>&1 &

5.4 测试

刷新binlog日志在主库上
mysql> flush logs;
查看binserver目录
[root@db03 binlog]# ls
mysql-bin.000001  mysql-bin.000002  mysql-bin.000003  mysql-bin.000004

6.基于MHA环境实现Atlas读写分离

6.1 安装Atlas

下载地址：https://github.com/Qihoo360/Atlas/releases
rpm -ivh Atlas-2.2.1.el6.x86_64.rpm 

6.2 修改配置文件

/usr/local/mysql-proxy/bin/encrypt  123  #制作加密密码
cd /usr/local/mysql-proxy/
vim /usr/local/mysql-proxy/conf/test.cnf
[mysql-proxy]
admin-username = user
admin-password = pwd
proxy-backend-addresses = 172.16.1.100:3306 #此处是mha的vip地址
proxy-read-only-backend-addresses = 172.16.1.52:3306,172.16.1.53:3306
pwds = repl:3yb5jEku5h4=,mha:O2jBXONX098=
daemon = true
keepalive = true
event-threads = 8
log-level = message
log-path = /usr/local/mysql-proxy/log
sql-log=ON
proxy-address = 0.0.0.0:33060
admin-address = 0.0.0.0:2345
charset=utf8

6.3 启动atlas

/usr/local/mysql-proxy/bin/mysql-proxyd test start

6.4 测试

测试读写分离：
读的测试
mysql -umha -pmha -h172.16.1.53 -P33060 
show variables like 'server_id';

写操作测试：
设置两个从节点只读
set global read_only=1;
连接测试
mysql -umha -pmha -h172.16.1.53 -P33060
create database db1;

6.5 管理altas

连接管理接口：
mysql -uuser -ppwd -h127.0.0.1 -P2345
打印帮助：
mysql> select * from help;
动态添加删除节点：
REMOVE BACKEND 3;
添加节点
ADD SLAVE 172.16.1.53:3306;
保存到配置文件中
SAVE CONFIG;