配置binlog-server

修改mha配置文件

[root@mysql-db03 ~]# vim /etc/mha/app1.cnf[binlog1]no_master=1hostname=10.0.0.53master_binlog_dir=/data/mysql/binlog/

备份binlog

#创建备份binlog目录[root@mysql-db03 ~]# mkdir -p /data/mysql/binlog/#进入该目录[root@mysql-db03 ~]# cd /data/mysql/binlog/#备份binlog[root@mysql-db03 binlog]# mysqlbinlog  -R --host=10.0.0.55 --user=mha --password=123 --raw  --stop-never mysql-bin.000001 启动mha[root@mysql-db03 binlog]# nohup masterha_manager --conf=/etc/mha/app1.cnf --remove_dead_master_conf --ignore_last_failover < /dev/null > /etc/mha/manager.log 2>&1 &

测试binlog备份

#查看binlog目录中的binlog[root@mysql-db03 binlog]# lltotal 44-rw-r--r-- 1 root root 285 Mar  8 03:11 mysql-bin.000001#登录主库[root@mysql-db01 ~]# mysql -uroot -p123#刷新binlogmysql> flush logs;#再次查看binlog目录[root@mysql-db03 binlog]# lltotal 48-rw-r--r-- 1 root root 285 Mar  8 03:11 mysql-bin.000001-rw-r--r-- 1 root root 143 Mar  8 04:00 mysql-bin.000002

MySQL中间件Atlas

Atlas简介

Atlas是由 Qihoo 360公司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。它在MySQL官方推出的MySQL-Proxy 0.8.2版本的基础上，修改了大量bug，添加了很多功能特性。

Atlas主要功能

• 1.读写分离
• 2.从库负载均衡
• 3.IP过滤
• 4.自动分表
• 5.DBA可平滑上下线DB
• 6.自动摘除宕机的DB

Atlas相对于官方MySQL-Proxy的优势

• 1.将主流程中所有Lua代码用C重写，Lua仅用于管理接口
• 2.重写网络模型、线程模型
• 3.实现了真正意义上的连接池
• 4.优化了锁机制，性能提高数十倍

安装Atlas

同学们有福了，安装Atlas真的是超级简单，官方提供的Atlas有两种：

1)Atlas (普通) : Atlas-2.2.1.el6.x86_64.rpm
2)Atlas (分表) : Atlas-sharding_1.0.1-el6.x86_64.rpm

这里我们只需要下载普通的即可。

#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%]

编辑配置文件

#进入Atlas工具目录[root@db04 ~]# cd /usr/local/mysql-proxy/ total 0drwxr-xr-x 2 root root 75 Nov 21 18:43 bindrwxr-xr-x 2 root root 22 Nov 21 18:43 conf drwxr-xr-x 3 root root 331 Nov 21 18:43 lib drwxr-xr-x 2 root root 6 Dec 17 2014 log[root@mysql-db01 ~]# cd /usr/local/mysql-proxy/bin/#生成密码[root@mysql-db01 bin]# ./encrypt oldboy123#修改Atlas配置文件[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 = 10.0.0.51:3306#Atlas后端连接的MySQL从库的IP和端口proxy-read-only-backend-addresses = 10.0.0.52:3306,10.0.0.53:3306#用户名与其对应的加密过的MySQL密码pwds = root:1N/CNLSgqXuTZ6zxvGQr9A==#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#管理接口的用户名admin-username = user #管理接口的密码 admin-password = pwd #Atlas监听的管理接口IP和端口 admin-address = 0.0.0.0:2345#client-ips = 127.0.0.1, 192.168.1

启动Atlas

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

Atlas管理操作

#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mysqlmysql> 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)

Atlas管理接口

[root@db04 conf]# mysql -uuser -ppwd -h127.0.0.1 -P2345 mysql> SELECT * FROM help; +----------------------------+---------------------------------------------------------+ | 命令                       |  描述                                                    | --------------------------------------------------------------------------------------- | SELECT * FROM help         |  查看帮助                                                | | SELECT * FROM backends     |  查看后端的服务器状态                                     | | SET OFFLINE $backend_id    |  平滑下线 例如：set offline 2;                           || SET ONLINE $backend_id     |  平滑上线 例如：set online 2;                            | | ADD MASTER $backend        |  添加后端主库：add master 10.0.0.55:3306;                | | ADD SLAVE $backend         |  添加后端从库：add slave 10.0.0.56:3306                  | | REMOVE BACKEND $backend_id |  删除后端节点: remove backend 1；                        || SELECT * FROM clients      |  查看允许连接的客户端IP                                   | | ADD CLIENT $client         |  添加客户端IP:add client 10.0.0.51                       | | REMOVE CLIENT $client      |  删除客户端IP:REMOVE CLIENT 10.0.0.51;                   | | SELECT * FROM pwds         |  查看后端数据库的用户名和密码                              || ADD PWD $pwd               |  添加用户，自动加密例如：add pwd root:123                  | | ADD ENPWD $pwd             |  添加用户，需要手写加密后的密码：add enpwd ljk:3yb5jEku5h4=;| | REMOVE PWD $pwd            |  删除没有用的用户：remove pwd ljk;                        || SAVE CONFIG                |  保存到配置文件                                           | | SELECT VERSION             |  查看版本                                                |+----------------------------+---------------------------------------------------------+

使用

mysql> select * from backends;+-------------+----------------+-------+------+| backend_ndx | address        | state | type |+-------------+----------------+-------+------+|           1 | 10.0.0.55:3306 | up    | rw   ||           2 | 10.0.0.53:3306 | up    | ro   ||           3 | 10.0.0.51:3306 | up    | ro   |+-------------+----------------+-------+------+3 rows in set (0.00 sec)mysql> add master 10.0.0.54:3306;Empty set (0.00 sec)mysql> select * from backends;+-------------+----------------+-------+------+| backend_ndx | address        | state | type |+-------------+----------------+-------+------+|           1 | 10.0.0.55:3306 | up    | rw   ||           2 | 10.0.0.54:3306 | up    | rw   ||           3 | 10.0.0.51:3306 | up    | ro   ||           4 | 10.0.0.53:3306 | up    | ro   |+-------------+----------------+-------+------+4 rows in set (0.00 sec)mysql> add slave 10.0.0.52:3306;Empty set (0.00 sec)mysql> select * from backends;+-------------+----------------+-------+------+| backend_ndx | address        | state | type |+-------------+----------------+-------+------+|           1 | 10.0.0.55:3306 | up    | rw   ||           2 | 10.0.0.54:3306 | up    | rw   ||           3 | 10.0.0.51:3306 | up    | ro   ||           4 | 10.0.0.53:3306 | up    | ro   ||           5 | 10.0.0.52:3306 | up    | ro   |+-------------+----------------+-------+------+5 rows in set (0.00 sec)

脚本

[root@db03 ~]# vim atlas.sh#!/bin/bashdown_master=`sed -rn 's#^Master (.*)(.*down!$#1#gp' /etc/mha/manager.log`new_master=`sed -rn 's#^Selected (.*)(.*master.$#1#gp' /etc/mha/manager.log`new_master_id=`mysql -uuser -ppwd -h127.0.0.1 -P2345 -e 'select * from backends'|grep $new_master|awk '{print $1}'`#删除被提升为主库的从库 mysql -uuser -ppwd -h127.0.0.1 -P2345 -e 'remove backend $new_master_id;save config;'#将down掉的master变成从库 mysql -uuser -ppwd -h127.0.0.1 -P2345 -e 'add slave ${down_master}:3306;save config;' /usr/local/mysql-proxy/bin/mysql-proxyd test restart

配置文件

[root@mysql-db01 ~]# vim /usr/local/mysql-proxy/conf/test.cnf