搭建keepalived+lvs 模式，简单笔记

17-05-12 来源：[db:作者]

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搭建keepalived+lvs 模式，简单笔记。环境介绍，分为四台机器，两台分发器，一台主一台备，（118.11，118.12）两台真实服务器（118.13，118.14），

前期准备，配置yum源，已经被告知，yum中有keepalived squid3.5.25版本。

# cat /etc/yum.repos.d/server.repo 前期yum配置
[local]
name=local
baseurl=http://192.168.86.5/rh63/x86_64/
gpgcheck=0 
yum install net-snmp -y #防止启动时报错，此包在监听心跳是有用 


 
yum install keepalived -y 
vim /etc/keepalived/keepalived.conf  #主备的配置如下 
/etc/init.d/keepalived restart
/etc/init.d/keepalived status
ip addr #查看vip是否绑定

ipvsadm
yum install ipvsadm
ipvsadm -A -t 10.110.118.10:8080
ipvsadm -a -t 10.110.118.10:8080 -r 10.110.118.13
ipvsadm -a -t 10.110.118.10:8080 -r 10.110.118.14

keepalived 主节点配置文件

! Configuration File for keepalived

global_defs {
   notification_email {
     17040387@qq.com
   }
   notification_email_from Proxyprdlvsmaster@lvs
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
}


vrrp_instance Proxy_lvs {
    state MASTER  #主节点标识 
    interface eth0
    virtual_router_id 55 #虚拟路由标识 如果同网段存在两个keepalived 就要区分此id了
    priority 100         #主节点权限，一定要大于备节点
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        10.110.118.10  #虚拟ip地址 
    }
}


virtual_server 10.110.118.10 8080 {  #vip服务器地址和配置
    delay_loop 6
    lb_algo rr
    lb_kind DR   # lvs模式 
    persistence_timeout 600
    protocol TCP


    real_server 10.110.118.13  8080 {  #真实后端服务器地址
        weight 1
        TCP_CHECK {
        connect_timeout 10
        nb_get_retry 3
        delay_before_retry 3
        connect_port 8080
        }
    }
    real_server 10.110.118.14 8080 {   #真实后端服务器地址
        weight 1
        TCP_CHECK {
        connect_timeout 10
        nb_get_retry 3
        delay_before_retry 3
        connect_port 8080
       }
    }
}

备节点配置文件

! Configuration File for keepalived

global_defs {
   notification_email {
     17040387@qq.com
   }
   notification_email_from Proxyprdlvsmaster@lvs
   smtp_server 127.0.0.1
   smtp_connect_timeout 30
   router_id LVS_DEVEL
}

vrrp_instance Proxy_lvs {
    state backup   #备节点标识 
    interface eth0
    virtual_router_id 55 #虚拟路由标识 如果同网段存在两个keepalived 就要区分此id了
    priority 90          #备节点权限，一定要小于备节点
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        10.110.118.10  #虚拟ip地址  
    }
}


virtual_server 10.110.118.10 8080 {  #vip服务器地址和配置
    delay_loop 6
    lb_algo rr 
    lb_kind DR   # lvs模式
    persistence_timeout 600
    protocol TCP


    real_server 10.110.118.13  8080 { #真实后端服务器地址
        weight 1
        TCP_CHECK {
        connect_timeout 10
        nb_get_retry 3
        delay_before_retry 3
        connect_port 8080
        }
    }
    real_server 10.110.118.14 8080 {  #真实后端服务器地址
        weight 1
        TCP_CHECK {
        connect_timeout 10
        nb_get_retry 3
        delay_before_retry 3
        connect_port 8080
       }
    }
}

real 节点，配置回环ip地址

#!/bin/bash
#Set the Virtual IP Address of Realserver
VIP=10.110.118.10

/etc/rc.d/init.d/functions
case "$1" in
start)
        echo "Set the Virtual IP Address of lo"
        ifconfig lo:0 $VIP netmask 255.255.255.255 up
        route add -host $VIP dev lo:0
        #echo "Set the Virtual IP Address Success"
;;
stop)
        echo "Close the Virtual IP Address of lo"
        route del -host $VIP dev lo:0
        ifconfig lo:0 down
        #echo "Close the Virtual IP Address Success"
;;
*)
        echo "Usage:$0 {start|stop}"
        exit 1
esac

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