Keepalived+lvs

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云数据库 RDS MySQL,高可用系列 2核4GB
简介:
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# yum install ipvsadm

Keepalived :

1. get keepalived.

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# wget http://www.keepalived.org/software/keepalived-1.2.12.tar.gz

2.解压keepalived.

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# tar xzvf keepalived-1.2.12.tar.gz

3. 进入目录

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# cd keepalived-1.2.12

4. 安装包.

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# yum install openssl-devel.x86_64 kernel-headers kernel-devel

5. 配置keepalived.

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#./configure

6. 编译.

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# make

7. 编译安装.

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# make install

8.自启动服务.

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#  cd /etc/sysconfig 
#  ln -s /usr/local/etc/sysconfig/keepalived . 
#  cd /etc/rc3.d/ 
#  ln -s /usr/local/etc/rc.d/init.d/keepalived S100keepalived 
#  cd /etc/init.d/ 
#  ln -s /usr/local/etc/rc.d/init.d/keepalived
#  ln -s /usr/local/sbin/keepalived /usr/sbin/
#  cd /etc/keepalived
#  ln -s /usr/local/etc/keepalived/keepalived.conf .

keepalived.conf

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! Configuration File  for  keepalived
global_defs { 
    router_id MYSQLD 
}
vrrp_instance MYSQLD_3306 { 
         state MASTER 
         interface em2 
         virtual_router_id 22 
         priority 101 
         advert_int 1 
         mcast_src_ip 192.168.253.9 
         authentication { 
                 auth_type PASS 
                 auth_pass lekan 
         }
         virtual_ipaddress { 
                 192.168.253.100 /24  dev em2 scope global 
        
         notify_master  "/etc/keepalived/notification_email.sh master" 
         notify_backup  "/etc/keepalived/notification_email.sh backup" 
}
virtual_server 192.168.253.100 3306 { 
         delay_loop 2 
         lb_algo rr 
         lb_kind DR 
         persistence_timeout 10 
         protocol TCP
         real_server 192.168.253.6 3306 { 
                 weight 1 
                 inhibit_on_failure 
                 notify_up  "/etc/keepalived/mysql.sh up" 
                 notify_down  "/etc/keepalived/mysql.sh down" 
                 TCP_CHECK { 
                         connect_timeout 3 
                         nb_get_retry 3 
                         delay_before_retry 3 
                         connect_port 3306 
                
         }
         real_server 192.168.253.8 3306 { 
                 weight 1 
                 inhibit_on_failure 
                 notify_down  "/etc/keepalived/mysql.sh down" 
                 notify_up  "/etc/keepalived/mysql.sh up" 
                 TCP_CHECK { 
                         connect_timeout 3 
                         nb_get_retry 3 
                         delay_before_retry 3 
                         connect_port 3306 
                
        
}

mysql.sh

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#!/bin/bash
case  $1  in 
         up) 
                 echo  "mysqld up"  | mutt -s  "keepalived mysqld"  tong.li@mail.lekan.com 
         ;; 
         down) 
                 echo  "mysqld down"  | mutt -s  "keepalived mysqld"  tong.li@mail.lekan.com 
         ;; 
         *) 
                 echo  "keepalived"  >>  /home/tong .li /keepalived .txt 
         ;; 
esac

notification_email.sh

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#!/bin/bash
case  $1  in 
         master) 
                 echo  "keepalived master failover"  | mutt -s  "keepalived"  tong.li@mail.lekan.com 
         ;; 
         backup) 
                 echo  "keepalived backup failover"  | mutt -s  "keepalived"  tong.li@mail.lekan.com 
         ;; 
         *) 
                 echo  "keepalived"  >>  /home/tong .li /keepalived .txt 
         ;; 
esac

realserver.sh

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#!/bin/bash
#description:start realserver
VIP=192.168.253.100
/etc/rc .d /init .d /functions
case  "$1"  in
start)
     /sbin/ifconfig  lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up
     /sbin/route  add -host $VIP dev lo:0
     echo  "1" > /proc/sys/net/ipv4/conf/lo/arp_ignore
     echo  "2" > /proc/sys/net/ipv4/conf/lo/arp_announce
     echo  "1" > /proc/sys/net/ipv4/conf/all/arp_ignore
     echo  "2" > /proc/sys/net/ipv4/conf/all/arp_announce
     sysctl -p > /dev/null  2>&1
     echo  "start LVS of RealServer DR"
     ;;
stop)
     /sbin/ifconfig  lo:0 down
     route del $VIP> /dev/null  2>&1
     echo  "0" > /proc/sys/net/ipv4/conf/lo/arp_ignore
     echo  "0" > /proc/sys/net/ipv4/conf/lo/arp_announce
     echo  "0" > /proc/sys/net/ipv4/conf/all/arp_ignore
     echo  "0" > /proc/sys/net/ipv4/conf/all/arp_announce
     echo  "close LVS of RealServer DR"
     ;;
*)
     echo  "Usage:$0 {start|stop}"
     exit  1
;;
esac










本文转自 Art_Hero 51CTO博客,原文链接:http://blog.51cto.com/curran/1387497,如需转载请自行联系原作者
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