Mysql-mmm套件安装：
在所有的数据库服务器，包括监控机上安装mysql-mmm套件
#解压mysql-mmm套件
[root@master1 src]# tar –xzvf mysql-mmm-2.2.1.tar.gz
#进入mysql-mmm路径
[root@master1 src]# cd mysql-mmm-2.2.1
在所有的数据库服务器上都运行(master1,master2,slave1,slave2)
[root@master1 ~]# /usr/local/mysql/bin/mysql -uroot –p
Enter password: Welcome to the MySQL monitor. Commands end with ; or \g. Your MySQL connection id is 7 Server version: 5.0.87-terry-debug-log Source distribution Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. #创建用户权限 mysql> GRANT REPLICATION CLIENT ON *.* TO 'mmm_monitor'@'192.168.21.%' IDENTIFIED BY '123456'; #创建用户权限 mysql> GRANT SUPER, REPLICATION CLIENT, PROCESS ON *.* TO 'mmm_agent'@'192.168.21.%' IDENTIFIED BY '123456'; #刷新权限 mysql> flush privileges; |
配置所有数据库服务器包括监控机上的文件
[root@master1 mysql-mmm-2.2.1]# vi /etc/mysql-mmm/mmm_common.conf
active_master_role writer <host default> cluster_interface eth0 #pid文件存储每次进程启动的pid pid_path /var/run/mmm_agentd.pid #路径位置 bin_path /usr/libexec/mysql-mmm/ #复制用户 replication_user replication #复制用户的明码 replication_password 123456 #Agent用户 agent_user mmm_agent #agent用户的密码 agent_password 123456 </host> #服务器数据库1 <host db1> #数据库服务器真实IP地址 ip 192.168.21.11 #数据库服务器模式 mode master peer db2 </host> <host db2> #数据库服务器真实IP地址 Ip 192.168.21.12 #数据库服务器模式 mode master peer db1 </host> <host db3> #数据库服务器真实IP地址 ip 192.168.21.13 #数据库服务器模式 mode slave </host> <host db4> #数据库服务器真实IP地址 ip 192.168.21.14 #数据库服务器模式 mode slave </host> #写入角色 <role writer> #主机编号 hosts db1, db2 #虚拟IP ips 192.168.21.101 #模式-独占 mode exclusive </role> #只读角色 <role reader> #主机编号 hosts db1, db2, db3,db4 #虚拟IP ips 192.168.21.111,192.168.21.112,192.168.21.114,192.168.21.115 #模式 负载均衡模式 mode balanced </role> |
修改监控机的mysql_mmm的配置
[root@monitor ~]# vi /etc/mysql-mmm/mmm_mon.conf
include mmm_common.conf <monitor> #监控机的IP ip 127.0.0.1 #pid文件路径 pid_path /var/run/mmm_mond.pid bin_path /usr/lib/mysql-mmm/ #状态文件路径 status_path /var/lib/misc/mmm_mond.status #可以ping的真实agent的IP ping_ips 192.168.21.11,192.168.21.12,192.168.21.13,192.168.21.14 #发现节点丢失则过6秒进行切换 auto_set_online 6 </monitor> <host default> monitor_user mmm_monitor monitor_password 123456 </host> debug 0 |
#启动数据库服务器上的agent
[root@master1 /]# /etc/init.d/mysql-mmm-agent start
Starting MMM Agent Daemon: [ OK ]
[root@master2 /]# /etc/init.d/mysql-mmm-agent start
Starting MMM Agent Daemon: [ OK ]
[root@slave1 /]# /etc/init.d/mysql-mmm-agent start
Starting MMM Agent Daemon: [ OK ]
[root@slave2 /]# /etc/init.d/mysql-mmm-agent start
Starting MMM Agent Daemon: [ OK ]
#启动监控机上的monitor
[root@monitor ~]# /etc/init.d/mysql-mmm-monitor start
Starting MMM Monitor Daemon: [ OK ]
#在监控机上的查看各个agent的信息
[root@monitor ~]# mmm_control show
db1(192.168.21.11) master/ONLINE. Roles: reader(192.168.21.112), writer(192.168.21.101)
db2(192.168.21.12) master/ONLINE. Roles: reader(192.168.21.111)
db3(192.168.21.13) slave/ONLINE. Roles: reader(192.168.21.115)
db4(192.168.21.14) slave/ONLINE. Roles: reader(192.168.21.114)
数据库的HA完毕
实现读写分离机制
设置代理
在192.168.21.6上安装mysql-proxy
#解压lua，并且安装
tar zxf lua-5.1.2.tar.gz && cd lua-5.1.2 && make linux install
修改rw-splitting.lua这个脚本是用来控制读写分离的
#mysql-proxy中参数的含义
--proxy-read-only-backend-addresses为只读的机器
--proxy-backend-addresses为写入机器
--keepalive 支持keealived检测心跳
--proxy-lua-script=rw-splitting.lua运用rw-splitting.lua脚本进行读写分离
./mysql-proxy
--proxy-read-only-backend-addresses=192.168.21.102:3306
--proxy-read-only-backend-addresses=192.168.21.103:3306
--proxy-backend-addresses=192.168.21.101:3306
--keepalive
--proxy-lua-script=rw-splitting.lua
测试
mysql –uproxytest –pproxytest –P4040 h192.168.21.200
用keepalived实现mysql-proxy高可用
在proxy1和proxy2上安装
#下载keepalived
wget http://www.keepalived.org/software/keepalived-1.1.19.tar.gz
#解压keepalived
tar zxvf keepalived-1.1.19.tar.gz
cd keepalived-1.1.19
#配置初始化参数，安装在/usr/local/keepalived目录下
./configure --prefix=/usr/local/keepalived
#编译
make
#编译安装
make install
cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/
mkdir /etc/keepalived
cd /etc/keepalived/
配置keepalived，
[root@mysqlproxy1 /]# vi /etc/keepalived/keepalived.conf
bal_defs { #配置邮件通知 notification_email { [email]xulean@gmail.com[/email] } notification_email_from [email]xulean@gmail.com[/email] smtp_server 127.0.0.1 smtp_connect_timeout 30 router_id test1 } vrrp_instance VI_1 { state MASTER interface eth0 virtual_router_id 51 priority 100 advert_int 1 smtp_alert authentication { auth_type PASS auth_pass 123 } #配置虚拟IP virtual_ipaddress { 192.168.21.200/32 scope global eth0 } } |
#启动keepalived
[root@mysqlproxy1 /]# /etc/rc.d/init.d/keepalived start
Starting keepalived: [ OK ]
[root@mysqlproxy2 /]# /etc/rc.d/init.d/keepalived start
Starting keepalived: [ OK ]
#在两台mysql-proxy上看是否启动了虚拟IP
[root@mysqlproxy2 ~]# ip add|grep 192.168.21.200
inet 192.168.21.200/32 scope global eth0
虚拟IP绑定成功
对数据库进行调整（引擎）
为使数据库能支持事务，数据库主库采用innoDB引擎，slave库采用默认innodb引擎，在主库级别设置autocommit为0，备库autocommit为1，说明主库不能进行自动提交，而备库可以实现自动提交的功能，因为我们针对的是主的操作。
