LVS DR模式搭建、 keepalived + LVS

boss44 发表于 2018-12-30 07:46:03

LVS DR模式搭建
http://i2.运维网.com/images/blog/201809/07/3fe989ece20df2a01c0a55e87f86e8e5.png
　　因为做lvsnat的时候把网关改了，现在改回来，然后在所有机器上绑定这个vip的ip

　　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=192.168.63.200
rs1=192.168.63.101
rs2=192.168.63.102
#注意这里的网卡名
ifdown ens33
ifup ens33
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

http://i2.运维网.com/images/blog/201809/07/ec4ccc8bc9da55cb84ed7a21fe219249.png

　　然后测试这个脚本是否编辑有问题

http://i2.运维网.com/images/blog/201809/07/f01e7ea37f7f3609527bd39892a80183.png

　　然后编写两个服务器的rs的脚本,编写脚本 vim /usr/local/sbin/lvs_rs.sh//内容如下

#/bin/bash
vip=192.168.63.200
#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 lo
ifup lo
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
http://i2.运维网.com/images/blog/201809/07/dbdcad58879c06f89acba4176caea5f7.png

　　编辑完成后需要检测脚本是否有问题

# sh /usr/local/sbin/lvs_rs.sh
　　查看网关

http://i2.运维网.com/images/blog/201809/07/dada60a96c8e8ef5c96461031119cb64.png

　　查看ip

http://i2.运维网.com/images/blog/201809/07/2e2dc3bbce8ac712c396340923b0138b.png

　　在dir上查看ip

http://i2.运维网.com/images/blog/201809/07/a683df5930deb76ac140564c470a9daf.png

　　测试
　　在Windows浏览器上有缓存测试受阻，在开一台Linux虚拟机做测试

http://i2.运维网.com/images/blog/201809/07/5aee1aa39e38f68d9b424499d4e9d1d1.png
　　负载均衡成功
http://i2.运维网.com/images/blog/201809/07/c90c41e59a51b0f6ccca03cc51889247.png

keepalived + LVS
http://i2.运维网.com/images/blog/201809/07/175f1f67ed9d7f2daea20a5221afec58.png
http://i2.运维网.com/images/blog/201809/07/6b1ba8249f53ea6ece3eb11ceaf6e626.png

　　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

编辑以下内容到keepalived配置文件里vim /etc/keepalived/keepalived.conf

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 {
192.168.63.200
}
}
virtual_server 192.168.63.200 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 0
#(用TCP协议检查realserver状态)
protocol TCP
real_server 192.168.63.101 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 192.168.63.102 80 {
weight 100
TCP_CHECK {
connect_timeout 10
nb_get_retry 3
delay_before_retry 3
connect_port 80
}
}
}

　　编辑完成启动keep

# systemctl start keepalived
http://i2.运维网.com/images/blog/201809/08/01fe725182d7d8301816149a402593d6.png

　　查看是有没有虚拟ip

http://i2.运维网.com/images/blog/201809/08/b49f8011fd4185b9d890b774413d728f.png
http://i2.运维网.com/images/blog/201809/08/25d56221ad4a1e58822b09287e139140.png
　　keepalived有自动把当机的rs剔除功能在上图如果看不到了就是给踢掉了
http://i2.运维网.com/images/blog/201809/08/53c28150664b30030ecca83480717fc8.png

扩展

　　haproxy+keepalived http://blog.csdn.net/xrt95050/article/details/40926255
haproxy+keepalived http://blog.csdn.net/xrt95050/article/details/40926255
nginx、lvs、haproxy比较 http://www.csdn.net/article/2014-07-24/2820837
keepalived中自定义脚本 vrrp_script http://my.oschina.net/hncscwc/blog/158746
lvs dr模式只使用一个公网ip的实现方法 http://storysky.blog.运维网.com/628458/338726

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LVS DR模式搭建、 keepalived + LVS