mysql抄书5：MySQL+kepalived高可用架构

Posted 2020-10-23 不懂ABAP的python不是好basis

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keepalive

类似3/4/7层交换机制的软件，也就是平时说的第三层、第四层、第七层交换
作用是检测web服务器的状态，如果有一台web服务器、mysql服务器宕机、或工作出现故障，keepalived检测到问题后，会将有故障的web服务器或者mysql服务器从系统中剔除
当服务工作正常后，keepalived自动将web、mysql服务加入到当前的服务群中
切换过程全部自动完成，不需要人工干涉
人工任务只是修复有故障的web和mysql服务

keepalived安装配置

tar zxf keepalived-1.2.1.tar.gz  
cd keepalived-1.2.1 &&./configure --with-kernel-dir=/usr/src/kernels/2.6.18-164.el5-i686 &&make && make install  
DIR=/usr/local/ 
cp $DIR/etc/rc.d/init.d/keepalived  /etc/rc.d/init.d/ 
cp $DIR/etc/sysconfig/keepalived /etc/sysconfig/ && mkdir -p /etc/keepalived 
cp $DIR/sbin/keepalived /usr/sbin/

修改master配置 vi /etc/keepalived/keepalived.conf

! Configuration File for keepalived  
global_defs {  
   notification_email {  
      [email protected]139.com  
   }  
   notification_email_from [email protected]139.com  
   smtp_server 127.0.0.1  
   smtp_connect_timeout 30  
   router_id LVS_DEVEL  
}  
# VIP1  
vrrp_instance VI_1 {  
    state MASTER
    interface eth0  
    lvs_sync_daemon_inteface eth0  
    virtual_router_id 151  
    priority 100  
    advert_int 5  
    nopreempt  
    authentication {  
        auth_type PASS  
        auth_pass 2222  
    }  
    virtual_ipaddress {  
        192.168.33.100  
    }  
}  
virtual_server 192.168.33.100 3306 {  
    delay_loop 6     
    lb_algo wrr     
    lb_kind DR    
    persistence_timeout 60     
    protocol TCP          
    real_server 192.168.33.10 3306 {  
        weight 100         
        notify_down /data/sh/mysql.sh  
        TCP_CHECK {  
        connect_timeout 10  
        nb_get_retry 3  
        delay_before_retry 3  
        connect_port 3306  
        }  
    }  
}