LVS+Keepalived实现负载均衡高可用

zhousi

使用脚本实现LVS负载均衡

环境：

3台主机

DS:192.168.100.1

RS1:192.168.100.11

RS2:192.168.100.12

VIP:192.168.100.100

安装ipvsadm

./configure --prefix=/usr/local/ipvsadm

make && make install

DS脚本如下：

#!/bin/bash

# description: start LVS of DirectorServer

VIP=192.168.100.100

RIP1=192.168.100.11

RIP2=192.168.100.12

./etc/rc.d/init.d/functions

logger LVS is $1

case "$1" in

start)

           /sbin/ipvsadm --set 30 5 60

           /sbin/ifconfig eth0:0 $VIP broadcast $VIP netmask 255.255.255.255 up

           /sbin/route add -host $VIP dev eth0:0

           /sbin/ipvsadm -A -t $VIP:80 -s wrr -p 3

           /sbin/ipvsadm -a -t $VIP:80 -r $RIP1:80 -g -w 1

           /sbin/ipvsadm -a -t $VIP:80 -r $RIP2:80 -g -w 1

           touch /var/lock/subsys/ipvsadm >/dev/null 2>&1

           echo "LVS is started!"

       ;;

stop)

           /sbin/ipvsadm -C

           /sbin/ipvsadm -Z

           ifconfig eth0:0 down

           ifconfig eth0:1 down

           route del $VIP

           route del $VIP

           rm -rf /var/lock/subsys/ipvsadm >/dev/null 2>&1

           echo "LVS is stoped"

           ;;

status)

             if [ ! -e /var/lock/subsys/ipvsadm ];then

                echo "ipvsadm has stoped"

           else

                echo "ipvsadm has started"

           fi

           ;;

*)

          echo "Usage: $0 {start|stop|status}"

           exit 1

esac

exit 0

RS脚本如下：

#!/bin/bash

# description: Config realserver lo and apply noarp  

VIP=192.168.100.100

. /etc/rc.d/init.d/functions

case "$1" in

start)

       ifconfig lo:0 $VIP netmask 255.255.255.255 broadcast $VIP

       /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 "RealServer Start OK"

       ;;

stop)

       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 "RealServer Stoped"

       ;;

*)

       echo "Usage: $0 {start|stop}"

       exit 1

esac

exit 0

LVS+Keepalived实现负载均衡高可用

环境：

DS1：192.168.100.1

DS2：192.168.100.2

RS1：192.168.100.11

RS2：192.168.100.12

VIP：192.168.100.100

之前已经安装ipvsadm这里不再阐述

安装keepalived

./configure --prefix=/usr/local/keepalived --with-kernel-dir=/usr/src/kernels/2.6.xxxxx

make && make install

mkdir /etc/keepalived

cp /usr/local/keepalived/etc/keepalived/keepalived.conf /etc/keepalived/

cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/

cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/

cp /usr/local/keepalived/sbin/keepalived /sbin

配置keepalived.conf

DS1：

global_defs {

   notification_email {

        root@localhost

   }

   notification_email_from root@localhost

   smtp_server 127.0.0.1

   smtp_connect_timeout 30

   router_id LVS_DEVEL

}

vrrp_instance VI_1 {

    state MASTER

    interface eth0

    virtual_router_id 51

    priority 100

    advert_int 1

    authentication {

        auth_type PASS

        auth_pass 1111

    }

    virtual_ipaddress {

        192.168.100.100

    }

}

virtual_server 192.168.100.100 80 {

    delay_loop 6

    lb_algo rr

    lb_kind DR

    nat_mask 255.255.255.0

    persistence_timeout 50

    protocol TCP

    real_server 192.168.100.11 80 {

        weight 1

        TCP_CHECK {

            connect_timeout 3

            nb_get_retry 3

            delay_before_retry 3

        }

    }

    real_server 192.168.100.12 80 {

        weight 1

        TCP_CHECK {

            connect_timeout 3

            nb_get_retry 3

            delay_before_retry 3

        }

DS2：

global_defs {

   notification_email {

        root@localhost

   }

   notification_email_from root@localhost

   smtp_server 127.0.0.1

   smtp_connect_timeout 30

   router_id LVS_DEVEL

}

vrrp_instance VI_1 {

    state BACKUP

    interface eth0

    virtual_router_id 51

    priority 90

    advert_int 1

    authentication {

        auth_type PASS

        auth_pass 1111

    }

    virtual_ipaddress {

        192.168.100.100

    }

}

virtual_server 192.168.100.100 80 {

    delay_loop 6

    lb_algo rr

    lb_kind DR

    nat_mask 255.255.255.0

    persistence_timeout 50

    protocol TCP

    real_server 192.168.100.11 80 {

        weight 1

        TCP_CHECK {

            connect_timeout 3

            nb_get_retry 3

            delay_before_retry 3

        }

    }

    real_server 192.168.100.12 80 {

        weight 1

        TCP_CHECK {

            connect_timeout 3

            nb_get_retry 3

            delay_before_retry 3

        }

两台DS都启动keepalived

/etc/init.d/keepalived start

两台RS也需要都运行上文的脚本

ipvsadm -ln 查看LVS状态

ipvsadm -lnc 查看LVS链接状态

可通过一个测试页面进行测试，代码如下（每两秒刷新一次，不缓存数据）：

通过不同的客户端访问，页面会轮流出现node1和node2

<html>

<head>

        <title>test</title>

        <meta HTTP-EQUIV="Cache-Control" CONTENT="no-cache"/>

        <meta http-equiv="Refresh" content="2"/>

</head>

<body>this is node1或2</body>

</html>

prollerweg

学习了，不错，讲的太有道理了

dew

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萨尔法保护

相当不错，感谢无私分享精神！

雷锋

爱护环境，人人有病。

杨叔叔

我的id是假冒的，大家不要相信我是骗子。

dong5300

没看完~~~~~~ 先顶，好同志