CentOS7 编译安装LVS 互为主备

CentOS7 编译安装LVS 互为主备 (实测笔记 Centos 7.0 + ipvsadm 1.27 + keepalived 1.2.15  LVS DR模式)

环境:

系统硬件:vmware vsphere (CPU2*4核,内存2G,双网卡)

LVS服务器(两台):

系统Centos7.0 64LVS+keepalived

LvsMaster:192.168.1.21 (VIP192.168.1.20 VIP192.168.1.18)

LvsBackup:192.168.1.22 (VIP192.168.1.18 VIP192.168.1.20)

Nginx服务器三台):

系统Centos7.0 64Nginx服务VIP:192.168.1.18

IIS01:192.168.1.31

IIS02:192.168.1.32

IIS03:192.168.1.33

IIS服务器(三台):

系统Windwos2008R2 64 IIS服务VIP:192.168.1.20

IIS01:192.168.1.41

IIS02:192.168.1.42

IIS03:192.168.1.43

 

RealServer 安装步骤

1.安装Web服务器Linxunginx主网卡接口名称ens192

此处以服务器:web01IP地址为:192.168.1.31说明(另外两台参考此处)

 

1.1 安装系统假定已经安装好系统并且已经能够正常提供Nginx服务
[root@web01 ~]# cat /etc/redhat-release
CentOS Linux release 7.0.1406 (Core)


[root@web01 ~]# uname -rs
Linux 3.10.0-123.20.1.el7.x86_64


修改主机名
[root@web01 ~]# hostnamectl set-hostname web01 

[root@web01 ~]#hostname
web01 

 

[root@web01~]# ip add show ens192

2:ens192: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen1000
link/ether 00:50:56:94:02:4a brd ff:ff:ff:ff:ff:ff
inet 192.168.1.31/24 brd 192.168.1.255 scope global ens192
valid_lft forever preferred_lft forever
inet6 fe80::250:56ff:fe94:24a/64 scope link
valid_lft forever preferred_lft forever

 

[root@web01~]# curl http://192.168.1.31

<html>
<head>
<title>Web 01 10:43:18</title>
</head>
<body>
<h1>Web Server 01 index.html</h1>
<p>2015-03-17 10:43:18</p>
</body>
</html>

 

1.2 设置服务器,以支持vip访问

方法1:直接创建lo:0文件,并且绑定VIP192.168.1.18

[root@web01~]# vim /etc/sysconfig/network-scripts/ifcfg-lo:0

打开编辑器,输入以下内容

DEVICE=lo:0
IPADDR=192.168.1.18
NETMASK=255.255.255.255
ONBOOT=yes
NAME=loopback

保存、退出

 

重启

[root@web01~]# shutdown -r now

 

测试是否绑定VIP

[root@web01~]# ip add show lo:0
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet 192.168.1.18/32 brd 192.168.1.18 scope global lo:0
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever

显示绑定即inet 192.168.1.18/32 brd 192.168.1.18 scope globallo:0

 

解决ARP问题

[root@web01~]# vim /etc/sysctl.conf

打开编辑器输入以下内容

net.ipv4.conf.lo.arp_ignore= 1
net.ipv4.conf.lo.arp_announce = 2
net.ipv4.conf.all.arp_ignore = 1
net.ipv4.conf.all.arp_announce = 2

保存、退出

 

设置即时生效

[root@web01 ~]# sysctl -f

 

设置说明

#arp_ignore=1,系统只回答目的IP为是本地IP的包。也就是对广播包不做响应。
#arp_announce=2
,系统忽略IP包的源地址(source address),而根据目标主机(target host),选择本地地址。

#arp_ignore限制arp应答。限制等级:

#0:对于其它设备arp请求,应答所有其它接口的上IParp应答

#1:对于其它设备的arp请求,只应答本接口上IParp应答

#arp_announce限制arp通告。限制等级:

#0:在接口上通告所有接口上IParp广播

#1:对于其它设备的arp请求,在接口上尽量限制广播通告应答(不够严格)

#2:只通告本接口上IParp广播

 

方法2:通过命令绑定绑定VIP192.168.1.18

[root@web01~]# vim /usr/local/sbin/lvs_realserver.sh

打开编辑器,输入以下内容

#!/bin/bash

VIP=192.168.1.18

/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

保存、退出

 

运行,查看是否生效,是否绑定VIP

[root@web01~]# /usr/local/sbin/lvs_realserver.sh start

[root@web01~]# ip add show lo:0


1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet 192.168.1.18/32 brd 192.168.1.18 scope global lo:0
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever

 

显示绑定即inet 192.168.1.18/32 brd192.168.1.18 scope global lo:0

 

设置自动启动

[root@web01~]# vim /etc/rc.d/rc.local
打开编辑器,添加以下内容

/usr/local/sbin/lvs_realserver.shstart

保存退出

 

设置运行权限(否则启动后,依然不会自动运行)

[root@web01~]#chmod 755 /etc/rc.d/rc.local

 

2.安装Web服务器(Windows2008r2IIS,主网卡接口名称:本地连接)

此处以服务器:IIS01IP地址为:192.168.1.41说明(另外两台参考此处)

 

2.1 安装系统(假定已经安装好系统,并且已经能够正常提供IIS服务)

IP地址:192.168.1.41

子网掩码:255.255.255.0

默认网关:192.168.1.1

首选DNS192.168.1.1

网页内容:

<html>
<head>
<title>IIS 01 10:43:18</title>
</head>
<body>
<h1>IIS 01 index.html</h1>
<p>2015-03-17 10:43:18</p>
</body>
</html>

 

2.2 设置服务器,添加环回接口,以支持vip访问

打开设备管理器-右键服务器名-添加过时硬件-打开硬件添加向导

下一步-安装我手动从列表选择的硬件(高级)-下一步-打开安装的硬件类型

选择网络适配器-下一步

厂商选择(Microsoft),网络适配器选择(Microsoft Loopback Adapter-下一步-下一步

点击完成

 

打开网络连接,修改Microsoft Loopback Adapter名称为realserver

打开realserverTCP/IPv4属性修改IP地址

IP地址:192.168.1.20

子网掩码:255.255.255.255

确认退出

 

运行cmd 打开命令行提示符窗口

运行以下命令修改网卡接口(即本地连接)、环回接口(realserver) 连接模式,用于解决ARP问题(否则TCP的状态会一直处于SYN_RECV 状态)

netshinterface ipv4 set interface "本地连接" weakhostreceive=enabled

netshinterface ipv4 set interface "本地连接" weakhostsend=enabled

netshinterface ipv4 set interface "realserver" weakhostreceive=enabled

netshinterface ipv4 set interface "realserver" weakhostsend=enabled

netshinterface ipv4 set interface "loopback" weakhostreceive=enabled

netshinterface ipv4 set interface "loopback" weakhostsend=enabled

 

3.安装LVS服务器

Linxuipvsadmkeepalived,主网卡接口名称:ens160

此处以服务器:lvs_masterIP地址为:192.168.1.21说明(lvs_backup 参考此处)

 

3.1.安装lvs_master

安装CentOS-7.0-1406-x86_64-DVD.iso

 

3.2.更新
[root@centos ~]# yum update

 

[root@centos~]# cat /etc/redhat-release
CentOS Linux release 7.0.1406 (Core)


[root@centos ~]# uname -rs
Linux 3.10.0-123.20.1.el7.x86_64

 

3.3.安装基本软件包

[root@centos~]# yum install vim wget lsof gcc gcc-c++ bzip2 -y

[root@centos~]# yum install net-tools bind-utils -y


3.4.
修改主机名
[root@localhost ~]# hostnamectl set-hostname lvs_master

[root@lvs_master~]# hostname
lvs_master


3.5.
修改IP地址
[root@lvs_master ~]# vim /etc/sysconfig/network-scripts/ifcfg-ens160

TYPE="Ethernet"
BOOTPROTO="static"
DEFROUTE="yes"
PEERDNS="yes"
PEERROUTES="yes"
IPV4_FAILURE_FATAL="no"
IPV6INIT="yes"
IPV6_AUTOCONF="yes"
IPV6_DEFROUTE="yes"
IPV6_PEERDNS="yes"
IPV6_PEERROUTES="yes"
IPV6_FAILURE_FATAL="no"
NAME="ens160"
ONBOOT="yes"
HWADDR="00:50:56:94:46:f8"
IPADDR="192.168.1.21"     
NETMASK="255.255.255.0"
GATEWAY="192.168.1.1"

确认修改,退出

 

lvs_backup服务器修改说明:

HWADDR="lvs_backup相应MAC地址"

IPADDR="192.168.1.22" 

 

[root@lvs_master~]# ifconfig ens160
ens160: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.1.21 netmask 255.255.255.0 broadcast 192.168.1.255
inet6 fe80::250:56ff:fe94:204c prefixlen 64 scopeid 0x20<link>
ether 00:50:56:94:20:4c txqueuelen 1000 (Ethernet)
RX packets 41559 bytes 59971168 (57.1 MiB)
RX errors 0 dropped 10 overruns 0 frame 0
TX packets 27992 bytes 2121802 (2.0 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0

 

3.6.安装ipvsadm

[root@lvs_master~]# yum install ipvsadm -y

================================================================================
Package
架构版本大小
================================================================================
正在安装:
ipvsadm x86_64 1.27-4.el7 base 44 k

事务概要
================================================================================
安装 1 软件包


[root@lvs_master ~]# ipvsadm --version
ipvsadm v1.27 2008/5/15 (compiled with popt and IPVS v1.2.1)


[root@lvs_master ~]# lsmod | grep ip_vs
ip_vs 136674 0
nf_conntrack 101024 9ip_vs,nf_nat,nf_nat_ipv4,nf_nat_ipv6,xt_conntrack,ip6table_nat,iptable_nat,nf_conntrack_ipv4,nf_conntrack_ipv6
libcrc32c 12644 2 xfs,ip_vs

 

3.7.安装keepalived

[root@lvs_mastersrc]# yum install kernel-devel -y

================================================================================
Package
架构版本大小
================================================================================
正在安装:
kernel-devel x86_64 3.10.0-123.20.1.el7 updates 8.9 M

事务概要
================================================================================
安装 1 软件包

 

[root@lvs_mastersrc]# ls /usr/src/kernels/
3.10.0-123.20.1.el7.x86_64


[root@lvs_master src]# cd /usr/local/src

[root@lvs_mastersrc]# wget www.keepalived.org/software/keepalived-1.2.15.tar.gz

[root@lvs_mastersrc]# tar zvxf keepalived-1.2.15.tar.gz

[root@lvs_mastersrc]# cd keepalived-1.2.15


[root@lvs_master keepalived-1.2.15]# yum install popt-devel popt-staticlibnl-devel openssl-devel iptraf -y

[root@KEEP ~]# cd /data/keepalived/

[root@KEEP keepalived]# tar zxvf keepalived-1.2.15.tar.gz

[root@KEEP keepalived]# cd keepalived-1.2.15/

[root@KEEP keepalived-1.2.15]# ./configure--prefix=/usr/local/keepalived

[root@KEEP keepalived-1.2.15]# make

[root@KEEP keepalived-1.2.15]# make install

[root@KEEP keepalived-1.2.15]# ln -s/usr/local/keepalived/etc/keepalived/ /etc/

[root@KEEP keepalived-1.2.15]# ln -s /usr/local/keepalived/etc/rc.d/init.d/keepalived/etc/init.d/

[root@KEEP keepalived-1.2.15]# ln -s/usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/

[root@KEEP keepalived-1.2.15]# ln -s/usr/local/keepalived/sbin/keepalived /usr/sbin/

[root@lvs_master keepalived-1.2.15]# ./configure--sysconfdir=/etc/ --sbindir=/usr/sbin/--with-kernel-dir=/usr/src/kernels/3.10.0-123.20.1.el7.x86_64/


Keepalived configuration
------------------------
Keepalived version : 1.2.15
Compiler : gcc
Compiler flags : -g -O2 -DFALLBACK_LIBNL1
Extra Lib : -lssl -lcrypto -lcrypt -lnl
Use IPVS Framework : Yes
IPVS sync daemon support : Yes
IPVS use libnl : Yes
fwmark socket support : Yes
Use VRRP Framework : Yes
Use VRRP VMAC : No
SNMP support : No
SHA1 support
Use Debug flags : No

[root@lvs_masterkeepalived-1.2.15]# make && make install

[root@lvs_masterkeepalived-1.2.15]# /usr/sbin/keepalived --version
Keepalived v1.2.15 (03/06,2015)

[root@lvs_masterkeepalived-1.2.15]# systemctl status keepalived
keepalived.service - SYSV: Start and stop Keepalived
Loaded: loaded (/etc/rc.d/init.d/keepalived)
Active: inactive (dead)

 

3.8.配置keepalived

[root@lvs_master/]# vim /etc/keepalived/keepalived.conf

打开编辑,修改

!Configuration File for keepalived
global_defs {
notification_email {
me@vicowong.com
#警报接收邮件
}
notification_email_from root@localhost
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id LVS_MASTER  
#lvs_backup LVS_MASTER修改为LVS_BACKUP

}

vrrp_instanceVI_IIS {
state MASTER
#lvs_backupMASTER改为BACKUP
interface ens160
#HA监测网络接口
virtual_router_id 51
 #主、备机的virtual_router_id一定要相同,必须相同!
priority 120 
  #lvs_backup120改为80
advert_int 1
  #VRRP Multicast广播周期秒数
authentication {
auth_type PASS #VRRP
认证方式
auth_pass 1111 #VRRP
口令字
}
virtual_ipaddress {
192.168.1.20 #LVS
虚拟地址
}
}

virtual_server192.168.1.20 80 {
delay_loop 2
#延时等待时间
lb_algo wrr
  #轮询算法
lb_kind DR
  #传输模式
persistence_timeout 1 #
单一链接重连保持时间
protocol TCP

real_server192.168.1.41 80 {
weight 100
  #权重
TCP_CHECK {
#realserve的状态检测设置部分,单位是秒
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 192.168.1.42 80 {
weight 100
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}

real_server192.168.1.43 80 {
weight 100
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}

}

vrrp_instanceVI_NGINX {
state BACKUP
 #lvs_backup上将BACKUP改为MASTER
interface ens160
#HA监测网络接口
virtual_router_id 53  #
主、备机的virtual_router_id一定要相同,必须相同
priority 80 
 #lvs_backup上将80改为120
advert_int 1
 #VRRPMulticast广播周期秒数
authentication {
auth_type PASS #VRRP
认证方式
auth_pass 1111 #VRRP
口令字
}
virtual_ipaddress {
192.168.1.18
#LVS虚拟地址
}
}

virtual_server192.168.1.18 80 {
delay_loop 2
#延时等待时间
lb_algo wrr
#轮询算法
lb_kind DR
#传输模式
persistence_timeout 1 #
单一链接重连保持时间
protocol TCP

real_server192.168.1.31 80 {
weight 100 #
权重
TCP_CHECK {
#realserve的状态检测设置部分,单位是秒
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}
real_server 192.168.1.32 80 {
weight 100
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}

real_server192.168.1.33 80 {
weight 100
TCP_CHECK {
connect_timeout 3
nb_get_retry 3
delay_before_retry 3
}
}

}

 

3.9 修改系统配置文件

[root@lvs_mastersrc]# vim /etc/sysctl.conf

打开编辑器,修改

net.ipv4.ip_forward= 1

#net.ipv4.conf.default.rp_filter= 1
#net.ipv4.conf.default.accept_source_route = 0
#ernel.sysrq = 0
#kernel.core_uses_pid = 1

保存,退出

 

运行生效

 [root@lvs_mastersrc]# sysctl -p

net.ipv4.ip_forward= 1

 

 

3.10.LVS运行测试(主备LVS服务器各出打开三个终端,共6个终端,每个单独运行以下一条命令,用于监测服务运行状态)

一个终端查看日志信息

[root@lvs_mastersrc]# tail -f /var/log/messages

 

一个终端查看LVS当前设置

[root@lvs_mastersrc]# watch ipvsadm -Ln

 

一个终端查看转发情况

[root@lvs_mastersrc]# watch ipvsadm -Lnc

 

3.11.设置自动运行keepalived
[root@lvs_master /]# vim /etc/rc.d/rc.local

打开编辑器,添加以下内容

iptables-F

systemctlstart keepalived

保存,退出

 

3.12.重启keepalived服务

[root@lvs_master/]# systemctl restart keepalived

信息可以在之前三个终端反映出来

 

3.13.关闭selinux 

[root@lvs_master ~]#vim /etc/selinux/config

打开编辑器,屏蔽以下两行

#SELINUX=enforcing

#SELINUXTYPE=targeted

添加以下一行

SELINUXTYPE=disabled

保存退出

 

重启后查询是否关闭显示Disabled则表示关闭

[root@lvs_master ~]#shutdown -r now

[root@lvs_master ~]#getenforce

Disabled

 

配置文件:

master:

[root@node1 keepalived]# cat keepalived.conf
! Configuration File for keepalived

global_defs {
   notification_email {
     acassen@firewall.loc
     failover@firewall.loc
     sysadmin@firewall.loc
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   router_id LVS_MASTER
}

vrrp_instance VI_1 {
    state MASTER
    #interface eth0
    interface eno16777728
    virtual_router_id 51
    priority 120
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.2.136
    }
}

virtual_server 192.168.2.136 80 {
    delay_loop 2
    lb_algo wrr
    lb_kind DR
    nat_mask 255.255.255.0
    persistence_timeout 1
    protocol TCP

    real_server 192.168.2.132 80  {
        weight 100
        TCP_CHECK {
        connect_timeout 3
        nb_get_retry 3
        delay_before_retry 3
        }
    }
}


vrrp_instance VI_2 {
    state BACKUP
    #interface eth0
    interface eno16777728
    virtual_router_id 53
    priority 80
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.2.135
    }
}

virtual_server 192.168.2.135 80 {
    delay_loop 2
    lb_algo wrr
    lb_kind DR
    nat_mask 255.255.255.0
    persistence_timeout 1
    protocol TCP

    real_server 192.168.2.133 80  {
        weight 100
        TCP_CHECK {
        connect_timeout 3
        nb_get_retry 3
        delay_before_retry 3
        }
    }
}


backup:

[root@node2 keepalived]# cat keepalived.conf
! Configuration File for keepalived

global_defs {
   notification_email {
     acassen@firewall.loc
     failover@firewall.loc
     sysadmin@firewall.loc
   }
   notification_email_from Alexandre.Cassen@firewall.loc
   smtp_server 192.168.200.1
   smtp_connect_timeout 30
   router_id LVS_BACKUP
}

vrrp_instance VI_1 {
    state BACKUP
    #interface eth0
    interface eno16777728
    virtual_router_id 51
    priority 80
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.2.136
    }
}

virtual_server 192.168.2.136 80 {
    delay_loop 2
    lb_algo wrr
    lb_kind DR
    nat_mask 255.255.255.0
    persistence_timeout 1
    protocol TCP

    real_server 192.168.2.132 80  {
        weight 100
        TCP_CHECK {
        connect_timeout 3
        nb_get_retry 3
        delay_before_retry 3
        }
    }
}


vrrp_instance VI_2 {
    state MASTER
    #interface eth0
    interface eno16777728
    virtual_router_id 53
    priority 120
    advert_int 1
    authentication {
        auth_type PASS
        auth_pass 1111
    }
    virtual_ipaddress {
        192.168.2.135
    }
}

virtual_server 192.168.2.135 80 {
    delay_loop 2
    lb_algo wrr
    lb_kind DR
    nat_mask 255.255.255.0
    persistence_timeout 1
    protocol TCP

    real_server 192.168.2.133 80  {
        weight 100
        TCP_CHECK {
        connect_timeout 3
        nb_get_retry 3
        delay_before_retry 3
        }
    }
}


realserver-1

[root@node3 sbin]# cat lvs_realserver.sh
#!/bin/bash
VIP=192.168.2.136

/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

realserver-2

[root@node4 sbin]# cat lvs_realserver.sh
#!/bin/bash
VIP=192.168.2.135

/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


 

 

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