目录
作者：AshesCat
1、介绍
Atlas是由Qihoo 360, Web平台部基础架构团队开发维护的一个基于MySQL协议的数据中间层项目
它是在mysql-proxy 0.8.2版本的基础上，对其进行了优化，增加了一些新的功能特性
360内部使用Atlas运行的mysql业务，每天承载的读写请求数达几十亿条
下载地址 ：https://github.com/Qihoo360/Atlas/releases
注意：
1、Atlas只能安装运行在64位的系统上
2、Centos 5.X安装Atlas-XX.el5.x86_64.rpm，Centos 6.X/7.X安装Atlas-XX.el6.x86_64.rpm
3、后端mysql版本应大于5.1，建议使用Mysql 5.6以上
2、安装配置
2.1 环境准备
两台服务器
192.168.10.54：MySQL 5.7.30 一主三从，3307-3310端口
192.168.10.55：Atlas
2.2 下载安装Altas
wget https://github.com/Qihoo360/Atlas/releases/download/2.2.1/Atlas-2.2.1.el6.x86_64.rpm
[root@db3 ~]# rpm -ivh Atlas-2.2.1.el6.x86_64.rpm
Preparing... ####################### [100%]
Updating / installing...
1:Atlas-2.2.1-1 ####################### [100%]
2.3 处理配置文件
[root@db3 ~]# cd /usr/local/mysql-proxy/conf/
[root@db3 conf]# mv test.cnf test.cnf.bak
[root@db3 conf]# vim test.cnf
[mysql-proxy]
admin-username = user # 管理用户
admin-password = pwd # 管理密码
proxy-backend-addresses = 192.168.10.54:3307 # 写节点（主库）
proxy-read-only-backend-addresses = 192.168.10.54:3308,192.168.10.54:3309,192.168.10.54:3310 # 只读节点（从库）
pwds = test:3yb5jEku5h4=,repl:3yb5jEku5h4= # 业务连接用户密码（逗号分隔），密码为Atlas/bin目录下encrypt命令生成
daemon = true # 后台运行
keepalive = true # 监测节点心跳
event-threads = 4 # 并发数量，设置cpu核数一半
log-level = message # 日志级别
log-path = /usr/local/mysql-proxy/log # 日志目录
sql-log = On # sql记录（可做审计）
proxy-address = 0.0.0.0:3306 # 业务连接端口
admin-address = 0.0.0.0:2345 # 管理连接端口
charset=utf8 # 字符集
2.4 启动服务
[root@db3 mysql-proxy]# /usr/local/mysql-proxy/bin/mysql-proxyd test start
OK: MySQL-Proxy of test is started
[root@db3 mysql-proxy]# ps -ef |grep proxy
root 105981 1 0 17:19 ? 00:00:00 /usr/local/mysql-proxy/bin/mysql-proxy --defaults-file=/usr/local/mysql-proxy/conf/test.cnf
root 105982 105981 0 17:19 ? 00:00:00 /usr/local/mysql-proxy/bin/mysql-proxy --defaults-file=/usr/local/mysql-proxy/conf/test.cnf
root 105995 1249 0 17:19 pts/0 00:00:00 grep --color=auto proxy
3、读写分离功能测试
测试读操作：
mysql -umha -pmha -h 10.0.0.53 -P 33060
db03 [(none)]>select @@server_id;
测试写操作：
mysql> begin;select @@server_id;commit;
注意:
DDL建议不要在Atlas触发，最好是到主库触发Online DDL或者PT-OSC
DML建议begin; DML; commit;
3.1 连接服务
[root@db5 conf]# mysql -urepl -p123 -h192.168.10.55 -P3306
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 1
Server version: 5.0.81-log MySQL Community Server (GPL) # 5.0.81版本
3.2 只读测试
mysql> select @@server_id;
+-------------+
| @@server_id |
+-------------+
| 9 |
+-------------+
1 row in set (0.00 sec)
mysql> select @@server_id;
+-------------+
| @@server_id |
+-------------+
| 10 |
+-------------+
1 row in set (0.00 sec)
mysql> select @@server_id;
+-------------+
| @@server_id |
+-------------+
| 8 |
+-------------+
1 row in set (0.00 sec)
3.3 写入测试
mysql> begin;select @@server_id;commit;
Query OK, 0 rows affected (0.00 sec)
+-------------+
| @@server_id |
+-------------+
| 7 |
+-------------+
1 row in set (0.00 sec)
Query OK, 0 rows affected (0.00 sec)
mysql> begin;select @@server_id;commit;
Query OK, 0 rows affected (0.00 sec)
+-------------+
| @@server_id |
+-------------+
| 7 |
+-------------+
1 row in set (0.00 sec)
Query OK, 0 rows affected (0.00 sec)
4、管理功能简介
4.1 持久化配置文件
mysql> save config;
Empty set (0.00 sec)
4.2 连接管理服务
[root@db5 bin]# mysql -uuser -ppwd -h192.168.10.55 -P2345
mysql: [Warning] Using a password on the command line interface can be insecure.
Welcome to the MySQL monitor. Commands end with ; or g.
Your MySQL connection id is 1
Server version: 5.0.99-agent-admin
4.3 节点管理
4.3.1 查看所有节点
mysql> SELECT * FROM backends;
+-------------+--------------------+-------+------+
| backend_ndx | address | state | type |
+-------------+--------------------+-------+------+
| 1 | 192.168.10.54:3307 | up | rw |
| 2 | 192.168.10.54:3308 | up | ro |
| 3 | 192.168.10.54:3309 | up | ro |
| 4 | 192.168.10.54:3310 | up | ro |
+-------------+--------------------+-------+------+
4 rows in set (0.00 sec)
4.3.2 节点的上线和下线
下线
mysql> set offline 1;
+-------------+--------------------+---------+------+
| backend_ndx | address | state | type |
+-------------+--------------------+---------+------+
| 1 | 192.168.10.54:3307 | offline | rw |
+-------------+--------------------+---------+------+
1 row in set (0.00 sec)
mysql> SELECT * FROM backends;
+-------------+--------------------+---------+------+
| backend_ndx | address | state | type |
+-------------+--------------------+---------+------+
| 1 | 192.168.10.54:3307 | offline | rw |
| 2 | 192.168.10.54:3308 | up | ro |
| 3 | 192.168.10.54:3309 | up | ro |
| 4 | 192.168.10.54:3310 | up | ro |
+-------------+--------------------+---------+------+
4 rows in set (0.00 sec)
上线
mysql> set online 1;
+-------------+--------------------+---------+------+
| backend_ndx | address | state | type |
+-------------+--------------------+---------+------+
| 1 | 192.168.10.54:3307 | unknown | rw |
+-------------+--------------------+---------+------+
1 row in set (0.00 sec)
4.3.3 添加删除节点
删除
mysql> remove backend 4;
Empty set (0.00 sec)
mysql> SELECT * FROM backends;
+-------------+--------------------+-------+------+
| backend_ndx | address | state | type |
+-------------+--------------------+-------+------+
| 1 | 192.168.10.54:3307 | up | rw |
| 2 | 192.168.10.54:3308 | up | ro |
| 3 | 192.168.10.54:3309 | up | ro |
+-------------+--------------------+-------+------+
3 rows in set (0.00 sec)
添加
mysql> add slave 192.168.10.54:3310;
Empty set (0.00 sec)
mysql> SELECT * FROM backends;
+-------------+--------------------+-------+------+
| backend_ndx | address | state | type |
+-------------+--------------------+-------+------+
| 1 | 192.168.10.54:3307 | up | rw |
| 2 | 192.168.10.54:3308 | up | ro |
| 3 | 192.168.10.54:3309 | up | ro |
| 4 | 192.168.10.54:3310 | up | ro |
+-------------+--------------------+-------+------+
4 rows in set (0.00 sec)
4.4 用户管理
4.4.1 在主库增加数据库用户
mysql> grant all on *.* to user1@'192.168.10.%' identified by '123';
Query OK, 0 rows affected, 1 warning (0.00 sec)
4.4.2 查看当前用
mysql> select * from pwds;
+----------+--------------+
| username | password |
+----------+--------------+
| test | 3yb5jEku5h4= |
| repl | 3yb5jEku5h4= |
+----------+--------------+
2 rows in set (0.00 sec)
4.4.3 增加Atlas用户
mysql> add pwd user1:123;
Empty set (0.00 sec)
mysql> select * from pwds;
+----------+--------------+
| username | password |
+----------+--------------+
| test | 3yb5jEku5h4= |
| repl | 3yb5jEku5h4= |
| user1 | 3yb5jEku5h4= |
+----------+--------------+
3 rows in set (0.00 sec)