Keepalived Load Balancer Instance

Objective: To realize load balancing of SR1 and SR2 by using keepalived to achieve load balance of HTTP user access 192.168.1.153.

Lab Environment:

sr1:192.168.1.151 HTTP Service

sr2:192.168.1.152 HTTP Service

ka1:192.168.1.150 Main keepalived

ka2:192.168.1.149 Preparation keepalived

vip:192.168.1.153 Virtual IP

Operation Steps:

One: SR1, SR2 install httpd service, configure virtual IP

Yum-y Install httpd

Mkdir/etc/sh

vim/etc/sh/dr.sh

#!/bin/bash
vip=192.168.1.153
Ifconfig lo:0 $VIP broadcast $VIP netmask 255.255.255.255 up
Route Add-host $vip 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

Change permissions and run

chmod 700/etc/sh/dr.sh;bash/etc/sh/dr.sh

Ifconfig View lo:0 is in the up state.

II: KA1, KA2 installation keepalived, Ipvsadm service

Yum-y Install keepalived

Yum-y Install Ipvsadm

Three: Configure the primary keepalived

Vim/etc/keepalived/keeplived.conf

! Configuration File for Keepalived

Global_defs {#全局配置
Notification_email {
[Email protected] #If there is a malfunction, the email address of the receiving part is not filled
[Email protected]
}
Notification_email_from [email protected]
Smtp_server 192.168.1.202
Smtp_connect_timeout 30#邮件服务器连接超时的最长时间
router_id Lvs_devel
}

Vrrp_instance Vi_1 {
State MASTER#主keepalived is MASTER, standby keepalived is set to backup
Interface eth0
VIRTUAL_ROUTER_ID 51
Priority 100#主keepalived的的优先级, prepared keepalived can be set to
Advert_int 1
Authentication {
Auth_type PASS
Auth_pass 1111
}

virtual_ipaddress {
192.168.1.153 #虚拟IP
}
}

Virtual_server 192.168.1.153 80 {
Delay_loop 6 #每6秒检查一次服务是否正常
Lb_algo RR #负载均衡的调度算法方式, typically using RR or WLC

Lb_kind Dr #负载均衡的模式, TUN, NTA, Dr three species
Nat_mask 255.255.255.0
Persistence_timeout 2 #会话保持时间, Unit: Sec. If it is a dynamic service, it is recommended to turn it on.

Protocol TCP#通讯模式. TCP UDP

Real_server 192.168.1.151 80 {#真实服务的IP
Weight 100#权重值, the larger the value, the higher the weight, the more likely the distributionTcp_check {
Connect_timeout 10# (10 seconds No response timeout)
Nb_get_retry 3
Delay_before_retry 3
Connect_port 80#端口
}
}

Real_server 192.168.1.152 80 {
Weight 10
Tcp_check {
Connect_timeout 10 # (10 seconds No response timeout)
Nb_get_retry 3
Delay_before_retry 3
Connect_port 80
}
}
}

Four: Configuration standby keepalived

Vim/etc/keepalived/keepalived.conf

On the basis of the main keepalived.conf

1:state MASTER modified to State BACKUP

2:priority 100 modified to Priority 90

Five: Start ka1 first, then start KA2

KA1:/etc/init.d/keepalived start;

KA2:/etc/init.d/keepalived start;

VI: The browser accesses the http://192.168.1.153 for testing.

This article is from the "night Reading Wit Hope female Ghost" blog, please be sure to keep this source http://more3.blog.51cto.com/9929586/1631208

Keepalived Load Balancer Instance