Lvs+keepalived Dr mode for web load balancing high availability

First, the environment introduction:

lvs_master:192.168.1.18

lvs_backup:192.168.1.19

web1:192.168.1.16

web2:192.168.1.17

vip:192.168.1.20

Second, installation:

Install the lvs+keepalived on both LVS:

Yum Install Lvsadm keepalived-y

Installing Nginx on two Web servers (installation configuration skipped)

Configuration keepalived:

Configuration on main LVS:

Vim/etc/keepalived/keepalived.conf

! Configuration File for Keepalived

Global_defs {

Notification_email {

[email protected]

}

notification_email_from [email protected]

Smtp_server 127.0.0.1

Smtp_connect_timeout 30

router_id Lvs_1

}

Vrrp_instance Vi_1 {

State MASTER

Interface eth0

VIRTUAL_ROUTER_ID 51

Priority

Advert_int 1

Authentication {

Auth_type PASS

Auth_pass 1111

}

virtual_ipaddress {

192.168.1.20

}

}

Virtual_server 192.168.1.20 80 {

Delay_loop 6

Lb_algo RR #lvs轮询方式

Lb_kind DR #lvs工作方式

Nat_mask 255.255.255.255

Protocol TCP

Real_server 192.168.1.16 80 {

Weight 10

Tcp_check {

Connect_timeout 10

Nb_get_retry 3

Delay_before_retry 3

Connect_port 80

}

}

Real_server 192.168.1.17 80 {

Weight 10

Tcp_check {

Connect_timeout 10

Nb_get_retry 3

Delay_before_retry 3

Connect_port 80

}

}

}

Only the red part can be modified on the prepared LVS:

State BACKUP

Priority

The above section is the end of the LVS machine configuration

The following is a configuration script on the Web machine, primarily binding the VIP and shutting down the ARP response

#!/bin/bash

vip=192.168.1.20

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

Case $ in

Start

Ifconfig lo:0 $VIP netmask 255.255.255.255 broadcast $VIP

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

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: $ start|stop"

Exit 1

Esac

Exit 0

Because the use of intranet IP, if you want to access the external network only the VIP 80 port on the router mapping can

This article from "People want to have a dream, in case the realization of" blog, please be sure to keep this source http://yangke.blog.51cto.com/9530509/1580940

Lvs+keepalived Dr mode for web load balancing high availability