mysql的MHA之Atlas 配置, 读写分离实现

1.安装 Atlas

#在主库安装，进入安装包目录
[root@mysql-db01 ~]# cd /home/oldboy/tools/
#下载Atlas
[root@mysql-db01 tools]# 
wget httpss://github.com/Qihoo360/Atlas/releases/download/2.2.1/Atlas-2.2.1.el6.x86_64.rpm
#安装
[root@mysql-db01 tools]# rpm -ivh Atlas-2.2.1.el6.x86_64.rpm 
Preparing...               ########################################### [100%]
  1:Atlas                  ########################################### [100%]

2.编辑配置文件

#进入Atlas工具目录
[root@mysql-db01 ~]# cd /usr/local/mysql-proxy/bin/
#生成密码
[root@mysql-db01 bin]# ./encrypt oldboy123
#注意这里的oldboy123是链接mysql的密码, 我们的密码是123456
他会生成如下:
[root@gukai bin]# ./encrypt 123456
/iZxz+0GRoA=
#生成密码的密钥对

[root@mysql-db01 ~]# vim /usr/local/mysql-proxy/conf/test.cnf
#Atlas后端连接的MySQL主库的IP和端口，可设置多项，用逗号分隔
proxy-backend-addresses = 10.0.0.50:3306
#Atlas后端连接的MySQL从库的IP和端口
proxy-read-only-backend-addresses = 10.0.0.51:3306,10.0.0.52:3306
#用户名与其对应的加密过的MySQL密码
pwds = root:/iZxz+0GRoA=
#SQL日志的开关
sql-log = ON
#Atlas监听的工作接口IP和端口
proxy-address = 0.0.0.0:3307
#默认字符集，设置该项后客户端不再需要执行SET NAMES语句
charset = utf8

3. 启动测试

[root@mysql-db01 ~]# /usr/local/mysql-proxy/bin/mysql-proxyd test start
OK: MySQL-Proxy of test is started

4. 管理Atlas

#用atlas管理用户登录
[root@mysql-db01 ~]# mysql -uuser -ppwd -h127.0.0.1 -P2345
#查看可用命令帮助
mysql> select * from help;
#查看后端代理的库
mysql> SELECT * FROM backends;
+-------------+----------------+-------+------+
| backend_ndx | address        | state | type |
+-------------+----------------+-------+------+
|           1 | 10.0.0.51:3307 | up    | rw   |
|           2 | 10.0.0.53:3307 | up    | ro   |
|           3 | 10.0.0.52:3307 | up    | ro   |
+-------------+----------------+-------+------+
#平滑摘除mysql
mysql> REMOVE BACKEND 2;
Empty set (0.00 sec)
#检查是否摘除成功
mysql> SELECT * FROM backends;
+-------------+----------------+-------+------+
| backend_ndx | address        | state | type |
+-------------+----------------+-------+------+
|           1 | 10.0.0.51:3307 | up    | rw   |
|           2 | 10.0.0.52:3307 | up    | ro   |
+-------------+----------------+-------+------+
#保存到配置文件中
mysql> SAVE CONFIG;
Empty set (0.06 sec)