前期準備
準備4臺機器，系統為CentOS release 6.6
Ip分別為192.168.20.121、192.168.20.122、192.168.20.123、192.168.20.124
4臺機器分別作為Atlas代理服務，master MySQL，slave MySQL 1，slave MySQL 2
下載QiHoo360的Atlas 地址
安裝Atlas
下載得到Atlas-XX.el6.x86_64.rpm安裝文件
sudo rpm –i Atlas-XX.el6.x86_64.rpm安裝
安裝在/usr/local/mysql-proxy
安裝目錄分析
bin
可執行文件
encrypt用來加密密碼，后面會用到
mysql-proxy是MySQL自己的讀寫分離代理
mysql-proxyd操作Atlas
VERSION
conf
test.cnf配置文件
一個文件為一個實例，實例名即文件名，啟動需要帶上這個實例名
lib依賴包
log記錄日志
啟動命令：/usr/local/mysql-proxy/bin/mysql-proxyd [實例名] start
停止命令：/usr/local/mysql-proxy/bin/mysql-proxyd [實例名] stop
同理，restart為重啟，status為查看狀態
配置文件解釋
請查看官方文檔
數據庫配置
1臺master2臺slave，都要配置相同的用戶名密碼，且都要可以遠程訪問分別進入3臺服務器，創建相同的用戶名密碼，創建數據庫test，設置權限
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;
主從數據庫配置
配置master服務器
找到MySQL配置文件my.cnf，一般在etc目錄下修改配置文件
[mysqld]
# 一些其他配置
...
#主從復制配置
innodb_flush_log_at_trx_commit=1
sync_binlog=1
#需要備份的數據庫
binlog-do-db=test
#不需要備份的數據庫
binlog-ignore-db=mysql
#啟動二進制文件log-bin=mysql-bin
#服務器IDserver-id=1
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
重啟數據庫service mysql restart
進入數據庫，配置主從復制的權限
mysql -uroot -p123456
grant replication slave on.to 'test'@'127.0.0.1' identified by 'test123';
查看主數據庫信息，記住下面的File與Position的信息，它們是用來配置從數據庫的關鍵信息。
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)
配置兩臺salve服務器
找到配置文件my.cnf修改配置文件如下
[mysqld]
# 一些其他配置
...
# 幾臺服務器不能一樣server-id=2
# Disabling symbolic-links is recommended to prevent assorted security risks
symbolic-links=0
進入數據庫，配置從數據庫的信息，這里輸入剛才記錄下來的File與Position的信息，并且在從服務器上執行(執行的時候，#行不要復制進去)：
# master數據庫的ip
mysql> change master to master_host='192.168.20.122',
# master的用戶名? ? ? ? master_user='buck',? ? ? ? # 密碼? ? ? ? master_password='hello',? ? ? ? # 端口? ? ? ? master_port=3306,? ? ? ? # master數據庫的`File `? ? ? ? master_log_file='mysql-bin.000002',? ? ? ? # master數據庫的`Position`? ? ? ? master_log_pos=17620976,? ? ? ? master_connect_retry=10;
啟動進程
mysql> start slave;
Query OK, 0 rows affected (0.00 sec)
檢查主從復制狀態，要看到下列Slave_IO_Running、Slave_SQL_Running的信息中，兩個都是Yes，才說明主從連接正確，如果有一個是No，需要重新確定剛才記錄的日志信息，停掉“stop slave”重新進行配置主從連接。
mysql> show slave status G;
1. row**
Slave_IO_State:WaitingformastertosendeventMaster_Host:192.168.246.134Master_User:buckMaster_Port:3306Connect_Retry:10Master_Log_File:mysql-bin.000002Read_Master_Log_Pos:17620976Relay_Log_File:mysqld-relay-bin.000002Relay_Log_Pos:251Relay_Master_Log_File:mysql-bin.000002Slave_IO_Running:YesSlave_SQL_Running:YesReplicate_Do_DB:Replicate_Ignore_DB:Replicate_Do_Table:Replicate_Ignore_Table:Replicate_Wild_Do_Table:Replicate_Wild_Ignore_Table:Last_Errno:0Last_Error:Skip_Counter:0Exec_Master_Log_Pos:17620976Relay_Log_Space:407Until_Condition:NoneUntil_Log_File:Until_Log_Pos:0Master_SSL_Allowed:NoMaster_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:0Last_IO_Error:Last_SQL_Errno:0Last_SQL_Error:
1 row in set (0.00 sec)
ERROR:
No query specified
Atlas配置
使用Atlas的加密工具對上面用戶的密碼進行加密
/usr/local/mysql-proxy/bin/encrypt test123
29uENYYsKLo=
配置atlas
這是用來登錄到Atlas的管理員的賬號與密碼，與之對應的是Atlas監聽的管理接口IP和端口，也就是說需要設置管理員登錄的端口，才能進入管理員界面，默認端口是2345，也可以指定IP登錄，指定IP后，其他的IP無法訪問管理員的命令界面。方便測試，我這里沒有指定IP和端口登錄。配置主數據的地址與從數據庫的地址，這里配置的主數據庫是122，從數據庫是123、124
#Atlas后端連接的MySQL主庫的IP和端口，可設置多項，用逗號分隔
proxy-backend-addresses = 192.168.20.122:3306
#Atlas后端連接的MySQL從庫的IP和端口，@后面的數字代表權重，用來作負載均衡，若省略則默認為1，可設置多項，用逗號分隔
proxy-read-only-backend-addresses = 192.168.20.123:3306@1,192.168.20.124:3306@2
這個是用來配置MySQL的賬戶與密碼的，就是上面創建的用戶，用戶名是test,密碼是test123,剛剛使用Atlas提供的工具生成了對應的加密密碼
pwds = buck:RePBqJ+5gI4=啟動Atlas
root[@localhost/usr/local/mysql-proxy/bin]# ./mysql-proxyd test start
OK: MySQL-Proxy of test is started
測試
進入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>使用工作接口來訪問
[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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