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.000002MySQL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 startedAtlas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
