前期准备
准备4台机器，系统为CentOS release 6.6
Ip分别为192.168.20.121、192.168.20.122、192.168.20.123、192.168.20.124
4台机器分别作为Atlas代理服务，master MySQL，slave MySQL 1，slave MySQL 2
下载QiHoo360的Atlas 地址
安装Atlas
下载得到Atlas-XX.el6.x86_64.rpm安装文件
sudo rpm –i Atlas-XX.el6.x86_64.rpm安装
安装在/usr/local/mysql-proxy
安装目录分析
bin
可执行文件
encrypt用来加密密码，后面会用到
mysql-proxy是MySQL自己的读写分离代理
mysql-proxyd操作Atlas
VERSION
conf
test.cnf配置文件
一个文件为一个实例，实例名即文件名，启动需要带上这个实例名
lib依赖包
log记录日志
启动命令：/usr/local/mysql-proxy/bin/mysql-proxyd [实例名] start
停止命令：/usr/local/mysql-proxy/bin/mysql-proxyd [实例名] stop
同理，restart为重启，status为查看状态
配置文件解释
请查看官方文档
数据库配置
1台master2台slave，都要配置相同的用户名密码，且都要可以远程访问分别进入3台服务器，创建相同的用户名密码，创建数据库test，设置权限
CREATE USER 'test'@'%' IDENTIFIED BY 'test123';
CREATE USER 'test'@'localhost' IDENTIFIED BY 'test123';
grant all privileges on test.* to 'test'@'%' identified by 'test123';
grant all privileges on test.* to 'test'@'localhost' identified by 'test123';
flush privileges;
主从数据库配置
配置master服务器
找到MySQL配置文件my.cnf，一般在etc目录下修改配置文件
[mysqld]
一些其他配置
...
主从复制配置
innodb_flush_log_at_trx_commit=1
sync_binlog=1
需要备份的数据库
binlog-do-db=test
不需要备份的数据库
binlog-ignore-db=mysql
启动二进制文件 log-bin=mysql-bin
服务器ID server-id=1
Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
重启数据库service mysql restart
进入数据库，配置主从复制的权限
mysql -uroot -p123456
grant replication slave on . to 'test'@'127.0.0.1' identified by 'test123';
查看主数据库信息，记住下面的File与Position的信息，它们是用来配置从数据库的关键信息。
mysql> show master status;
+------------------+----------+--------------+------------------+
| File | Position | Binlog_Do_DB | Binlog_Ignore_DB |
+------------------+----------+--------------+------------------+
| mysql-bin.000002 | 17620976 | test | mysql |
+------------------+----------+--------------+------------------+
1 row in set (0.00 sec)
配置两台salve服务器
找到配置文件my.cnf修改配置文件如下
[mysqld]
一些其他配置
...
几台服务器不能一样 server-id=2
Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
进入数据库，配置从数据库的信息，这里输入刚才记录下来的File与Position的信息，并且在从服务器上执行(执行的时候，#行不要复制进去)：
master数据库的ip
mysql> change master to master_host='192.168.20.122',
# master的用户名 master_user='buck', # 密码 master_password='hello', # 端口 master_port=3306, # master数据库的`File ` master_log_file='mysql-bin.000002', # master数据库的`Position` master_log_pos=17620976, master_connect_retry=10;
启动进程
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
检查主从复制状态，要看到下列Slave_IO_Running、Slave_SQL_Running的信息中，两个都是Yes，才说明主从连接正确，如果有一个是No，需要重新确定刚才记录的日志信息，停掉“stop slave”重新进行配置主从连接。
mysql> show slave status G;
-
row **
Slave_IO_State: Waiting for master to send event Master_Host: 192.168.246.134 Master_User: buck Master_Port: 3306 Connect_Retry: 10 Master_Log_File: mysql-bin.000002 Read_Master_Log_Pos: 17620976 Relay_Log_File: mysqld-relay-bin.000002 Relay_Log_Pos: 251 Relay_Master_Log_File: mysql-bin.000002 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: 17620976 Relay_Log_Space: 407 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:
1 row in set (0.00 sec)
ERROR:
No query specified
Atlas配置
使用Atlas的加密工具对上面用户的密码进行加密
/usr/local/mysql-proxy/bin/encrypt test123
29uENYYsKLo=
配置atlas
这是用来登录到Atlas的管理员的账号与密码，与之对应的是Atlas监听的管理接口IP和端口，也就是说需要设置管理员登录的端口，才能进入管理员界面，默认端口是2345，也可以指定IP登录，指定IP后，其他的IP无法访问管理员的命令界面。方便测试，我这里没有指定IP和端口登录。配置主数据的地址与从数据库的地址，这里配置的主数据库是122，从数据库是123、124
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 = 192.168.20.122:3306
Atlas后端连接的MySQL从库的IP和端口，@后面的数字代表权重，用来作负载均衡，若省略则默认为1，可设置多项，用逗号分隔
proxy-read-only-backend-addresses = 192.168.20.123:3306@1,192.168.20.124:3306@2
这个是用来配置MySQL的账户与密码的，就是上面创建的用户，用户名是test,密码是test123,刚刚使用Atlas提供的工具生成了对应的加密密码
pwds = buck:RePBqJ+5gI4=启动Atlas
root[@localhost /usr/local/mysql-proxy/bin]# ./mysql-proxyd test start
OK: MySQL-Proxy of test is started
测试
进入atlas的管理界面
root[@localhost ~]#mysql -h127.0.0.1 -P2345 -uuser -ppwd
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 1
Server version: 5.0.99-agent-admin
Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
Other names may be trademarks of their respectiveowners.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
mysql> select * from help;
+----------------------------+---------------------------------------------------------+
| command | description |
+----------------------------+---------------------------------------------------------+
| SELECT * FROM help | shows this help |
| SELECT * FROM backends | lists the backends and their state |
| SET OFFLINE $backend_id | offline backend server, $backend_id is backend_ndx's id |
| SET ONLINE $backend_id | online backend server, ... |
| ADD MASTER $backend | example: "add master 127.0.0.1:3306", ... |
| ADD SLAVE $backend | example: "add slave 127.0.0.1:3306", ... |
| REMOVE BACKEND $backend_id | example: "remove backend 1", ... |
| SELECT * FROM clients | lists the clients |
| ADD CLIENT $client | example: "add client 192.168.1.2", ... |
| REMOVE CLIENT $client | example: "remove client 192.168.1.2", ... |
| SELECT * FROM pwds | lists the pwds |
| ADD PWD $pwd | example: "add pwd user:raw_password", ... |
| ADD ENPWD $pwd | example: "add enpwd user:encrypted_password", ... |
| REMOVE PWD $pwd | example: "remove pwd user", ... |
| SAVE CONFIG | save the backends to config file |
| SELECT VERSION | display the version of Atlas |
+----------------------------+---------------------------------------------------------+
16 rows in set (0.00 sec)
mysql> 使用工作接口来访问
[root@localhost ~]#mysql -h127.0.0.1 -P1234 -utest -ptest123
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 34
Server version: 5.0.81-log MySQL Community Server (GPL)
Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
Oracle is a registered trademark of Oracle Corporation and/or its
Other names may be trademarks of their respectiveowners.
Type 'help;' or 'h' for help. Type 'c' to clear the current input statement.
mysql> show databases;
+--------------------+
| Database |
+--------------------+
| information_schema |
| mysql |
| performance_schema |
| test |
+--------------------+
4 rows in set (0.00 sec)
mysql>
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