DR模式搭建

一、

• dir上编写脚本 vim /usr/local/sbin/lvs_dr.sh //内容如下

#! /bin/bash

echo 1 > /proc/sys/net/ipv4/ip_forward

ipv=/usr/sbin/ipvsadm

vip=192.168.133.200

rs1=192.168.133.132

rs2=192.168.133.133

#注意这里的网卡名字

ifconfig ens33:2 $vip broadcast $vip netmask 255.255.255.255 up

route add -host $vip dev ens33:2

$ipv -C

$ipv -A -t $vip:80 -s wrr

$ipv -a -t $vip:80 -r $rs1:80 -g -w 1

$ipv -a -t $vip:80 -r $rs2:80 -g -w 1

二、

• 两台rs上也编写脚本 vim /usr/local/sbin/lvs_rs.sh//内容如下

#/bin/bash

vip=192.168.133.200

#把vip绑定在lo上，是为了实现rs直接把结果返回给客户端

ifconfig lo:0 $vip broadcast $vip netmask 255.255.255.255 up

route add -host $vip lo:0

#以下操作为更改arp内核参数，目的是为了让rs顺利发送mac地址给客户端

#参考文档www.cnblogs.com/lgfeng/archive/2012/10/16/2726308.html

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

• 分别在dir上和两个rs上执行这些脚本

• 测试

实例：

[root@localhosts 01]# vim /usr/local/sbin/lvs_dr.sh #! /bin/bashecho 1 > /proc/sys/net/ipv4/ip_forwardipv=/usr/sbin/ipvsadmvip=192.168.133.200rs1=192.168.133.132rs2=192.168.133.133#注意这里的网卡名字ifdown ens33ifup ens33ifconfig ens33:2 $vip broadcast $vip netmask 255.255.255.255 uproute add -host $vip dev ens33:2$ipv -C$ipv -A -t $vip:80 -s rr$ipv -a -t $vip:80 -r $rs1:80 -g -w 1$ipv -a -t $vip:80 -r $rs2:80 -g -w 1[root@localhosts 01]#  sh /usr/local/sbin/lvs_dr.sh 在两台rs上面操作[root@localhosts 02]# vim /usr/local/sbin/lvs_rs.sh#/bin/bashvip=192.168.133.200#把vip绑定在lo上，是为了实现rs直接把结果返回给客户端ifconfig lo:0 $vip broadcast $vip netmask 255.255.255.255 uproute add -host $vip lo:0#以下操作为更改arp内核参数，目的是为了让rs顺利发送mac地址给客户端#参考文档www.cnblogs.com/lgfeng/archive/2012/10/16/2726308.htmlecho "1" >/proc/sys/net/ipv4/conf/lo/arp_ignoreecho "2" >/proc/sys/net/ipv4/conf/lo/arp_announceecho "1" >/proc/sys/net/ipv4/conf/all/arp_ignoreecho "2" >/proc/sys/net/ipv4/conf/all/arp_announce​[root@localhosts 02]# vim /usr/local/sbin/lvs_rs.sh#/bin/bashvip=192.168.133.200#把vip绑定在lo上，是为了实现rs直接把结果返回给客户端ifdown loifup loifconfig lo:0 $vip broadcast $vip netmask 255.255.255.255 uproute add -host $vip lo:0#以下操作为更改arp内核参数，目的是为了让rs顺利发送mac地址给客户端#参考文档www.cnblogs.com/lgfeng/archive/2012/10/16/2726308.htmlecho "1" >/proc/sys/net/ipv4/conf/lo/arp_ignoreecho "2" >/proc/sys/net/ipv4/conf/lo/arp_announceecho "1" >/proc/sys/net/ipv4/conf/all/arp_ignoreecho "2" >/proc/sys/net/ipv4/conf/all/arp_announce[root@localhosts 02]# sh /usr/local/sbin/lvs_rs.sh[root@localhosts 03]# vim /usr/local/sbin/lvs_dr.sh#/bin/bashvip=192.168.133.200#把vip绑定在lo上，是为了实现rs直接把结果返回给客户端ifconfig lo:0 $vip broadcast $vip netmask 255.255.255.255 uproute add -host $vip lo:0#以下操作为更改arp内核参数，目的是为了让rs顺利发送mac地址给客户端#参考文档www.cnblogs.com/lgfeng/archive/2012/10/16/2726308.htmlecho "1" >/proc/sys/net/ipv4/conf/lo/arp_ignoreecho "2" >/proc/sys/net/ipv4/conf/lo/arp_announceecho "1" >/proc/sys/net/ipv4/conf/all/arp_ignoreecho "2" >/proc/sys/net/ipv4/conf/all/arp_announce[root@localhosts 03]# sh /usr/local/sbin/lvs_dr.sh在所有的机器上面操作，查看是否有192.168.133.200，IP地址[root@localhosts ]# route -n[root@localhosts ]# ip add[root@localhosts ]# iptables -t nat -F[root@localhosts ]# curl http：//192.168.133.200/[root@localhosts ]#[root@localhosts 01]# ipvsadm -ln

测试

在浏览器里面输入：192.168.133.200

Keepalived+LVS DR

• 编辑keepalived配置文件 vim /etc/keepalived/keepalived.conf//内容请到https://coding.net/u/aminglinux/p/aminglinux-book/git/blob/master/D21Z/lvs_keepalived.conf 获取

• 需要更改里面的ip信息

• 执行ipvsadm -C  把之前的ipvsadm规则清空掉

• systemctl restart network 可以把之前的vip清空掉

• 两台rs上，依然要执行/usr/local/sbin/lvs_rs.sh脚本

• keepalived有一个比较好的功能，可以在一台rs宕机时，不再把请求转发过去

• 测试

实例：

[root@localhosts 03]# systemctl stop nginx                   #关闭nginx 然后在浏览器刷新页面，发现页面刷新不了[root@localhosts 03]# ps aux | grep nginx [root@localhosts 01]# ipvsadm  -ln[root@localhosts 01]# vi /etc/keepalived/keepalived.conf        #把里面的东西清空之后复制，下面的内容vrrp_instance VI_1 {    #备用服务器上为 BACKUP    state MASTER    #绑定vip的网卡为ens33，你的网卡和阿铭的可能不一样，这里需要你改一下    interface ens33    virtual_router_id 51    #备用服务器上为90    priority 100    advert_int 1    authentication {        auth_type PASS        auth_pass aminglinux    }    virtual_ipaddress {        192.168.133.200    }}virtual_server 192.168.133.200 80 {    #(每隔10秒查询realserver状态)    delay_loop 10    #(lvs 算法)    lb_algo wlc    #(DR模式)    lb_kind DR    #(同一IP的连接60秒内被分配到同一台realserver)    persistence_timeout 60    #(用TCP协议检查realserver状态)    protocol TCP    real_server 192.168.133.132 80 {        #(权重)        weight 100        TCP_CHECK {        #(10秒无响应超时)        connect_timeout 10        nb_get_retry 3        delay_before_retry 3        connect_port 80        }    }    real_server 192.168.133.133 80 {        weight 100        TCP_CHECK {        connect_timeout 10        nb_get_retry 3        delay_before_retry 3        connect_port 80        }     }}[root@localhosts 01]# systemctl start keepalived             #开启 keepalived [root@localhosts 01]# ps aux | grep keep[root@localhosts 01]# ip add[root@localhosts 01]# ipvsadm -ln[root@localhosts 01]# ip add[root@localhosts 01]# systemctl stop keepalived                   #关闭 keepalived [root@localhosts 03]# systemctl start nginx[root@localhosts 01]# ipvsadm -ln[root@localhosts 01]# systemctl start keepalived                   #开启 keepalived [root@localhosts 01]# ipvsadm -ln

 

 

扩展 haproxy+keepalived http://blog.csdn.net/xrt95050/article/details/40926255 nginx、lvs、haproxy比较 http://www.csdn.net/article/2014-07-24/2820837