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Haproxy + keepalived 高可用负载均衡解决方案

时间:2017-07-24 11:35:29      阅读:150      评论:0      收藏:0      [点我收藏+]

标签:haproxy + keepalived

文档作者:amunlinux

文档版本:Version 1.1

修改记录:2017-04-22

系统环境:CentOS 6.8 64 bit


IP 信息列表: 


名称 IP 

-----------------------------------

VIP   192.168.200.254 

Haproxy-1 192.168.200.202

Haproxy-2 192.168.200.204

Nginx1   192.168.200.202 

Nginx2 192.168.200.203



1、在Nginx1/2上编译安装nginx服务

1.1首先安装Nginx1

[root@Nginx-1 ~]# yum -y install pcre-devel zlib-devel

[root@Nginx-1 ~]# useradd -M -s /sbin/nologin  nginx

[root@Nginx-1 ~]# tar xf nginx-1.6.2.tar.gz -C /usr/src

[root@Nginx-1 ~]# cd /usr/src/nginx-1.6.2

[root@Nginx-1 nginx-1.6.2]# ./configure --prefix=/usr/local/nginx --user=nginx --group=nginx && make && make install

[root@Nginx-1 nginx-1.6.2]# cd /usr/local/nginx/html/

[root@Nginx-1 html]# echo "server 192.168.200.202" > index.html

[root@Nginx-1 html]# /usr/local/nginx/sbin/nginx 

[root@Nginx-1 html]# netstat -anpt |grep nginx

tcp        0      0 0.0.0.0:80                  0.0.0.0:*                   LISTEN      4503/nginx  




1.2安装Nginx2, 同Nginx1搭建方式是一样的。

与Nginx1唯一不同的是:

[root@Nginx-2 html]# echo "server 192.168.200.203" > index.html





2.安装Haproxy-1与Haproxy-2 两台机器配置一致:

[root@Haproxy-1 ~]# yum -y install pcre-devel bzip2-devel

[root@Haproxy-1 ~]# tar xf haproxy-1.4.24.tar.gz -C /usr/src/

[root@Haproxy-1 ~]# cd /usr/src/haproxy-1.4.24/

[root@Haproxy-1 haproxy-1.4.24]# make TARGET=linux26 && make install


2.1Haproxy服务器配置

建立haproxy的配置目录及文件

[root@Haproxy-1 haproxy-1.4.24]# mkdir /etc/haproxy

[root@Haproxy-1 haproxy-1.4.24]# cp examples/haproxy.cfg /etc/haproxy/


2.2 haproxy配置项的介绍

haproxy的配置文件通常分为三部分: global(全局配置部分) defaults(默认配置部分) listen(应用组件部分)



[root@Haproxy-1 ~]# vim /etc/haproxy/haproxy.cfg

# this config needs haproxy-1.1.28 or haproxy-1.2.1


global

log 127.0.0.1 local0

log 127.0.0.1 local1 notice

#log loghost local0 info

maxconn 4096

#chroot /usr/share/haproxy

uid 99

gid 99

daemon

#debug

#quiet


defaults

log global

mode http

option httplog

option dontlognull

retries 3

#redispatch

maxconn 2000

contimeout 5000

clitimeout 50000

srvtimeout 50000


listen web-cluster 0.0.0.0:80

option httpchk GET /index.html

balance roundrobin

server inst1 192.168.200.202:80 check inter 2000 fall 3

server inst2 192.168.200.203:80 check inter 2000 fall 3



2.3 创建自启动脚本

[root@Haproxy-1 ~]# cp /usr/src/haproxy-1.4.24/examples/haproxy.init /etc/init.d/haproxy

[root@Haproxy-1 ~]# ln -s /usr/local/sbin/haproxy /usr/sbin/haproxy

[root@Haproxy-1 ~]# chmod +x /etc/init.d/haproxy 

[root@Haproxy-1 ~]# /etc/init.d/haproxy start

Starting haproxy:                                          [确定]



2.4 测试:

用浏览器打开 http://192.168.200.204

再次打开一个新的浏览器再次访问 http://192.168.200.204


用浏览器打开 http://192.168.200.202

再次打开一个新的浏览器再次访问 http://192.168.200.202


可以验证两次访问到的结果分别为:

server 192.168.200.202

server 192.168.200.203





3、编译安装keepalived服务

[root@Haproxy-1 ~]# yum -y install kernel-devel openssl-devel popt-devel

[root@Haproxy-1 ~]# tar xf keepalived-1.2.13.tar.gz 

[root@Haproxy-1 ~]# cd keepalived-1.2.13

[root@Haproxy-1 keepalived-1.2.13]# ./configure --prefix=/ --with-kernel-dir=/usr/src/kernels/2.6.18-194.el5-i686 && make && make install


3.1 配置keepalibed 开机启动脚本

[root@Haproxy-1 ~]# chkconfig --add keepalived

[root@Haproxy-1 ~]# chkconfig keepalived on

[root@Haproxy-1 ~]# chkconfig --list keepalived

[root@Haproxy-1 ~]# service keepalived start|stop    


3.2.1 配置keepalibed 主配置文件

[root@Haproxy-1 ~]# vim /etc/keepalived/keepalived.conf 

! Configuration File for keepalived


vrrp_script chk_http_port {

script "/etc/keepalived/check_haproxy.sh"

interval 2

weight 2


global_defs {

router_id LVS_DEVEL

}

vrrp_instance VI_1 {

state MASTER 

interface eth0

virtual_router_id 51 

priority 100

advert_int 1

authentication {

auth_type PASS

auth_pass 1111

}


track_script {

chk_http_port

}


virtual_ipaddress {

192.168.200.254 

}

}

}



3.2.2 第二台Haproxy配置keepalibed 主配置文件

[root@Haproxy-2 ~]# cat /etc/keepalived/keepalived.conf 

! Configuration File for keepalived


vrrp_script chk_http_port {

script "/etc/keepalived/check_haproxy.sh"

interval 2

weight 2


global_defs {

router_id LVS_DEVEL

}

vrrp_instance VI_1 {

state BACKUP 

interface eth0

virtual_router_id 51 

priority 50

advert_int 1

authentication {

auth_type PASS

auth_pass 1111

}


track_script {

chk_http_port

}


virtual_ipaddress {

192.168.200.254 

}

}

}


4、两台机器上都配置haproxy检测脚本

[root@Haproxy-1 ~]# cat /etc/keepalived/check_haproxy.sh 

#!/bin/bash

A=`ps -C haproxy --no-header |wc -l`

if [ $A -eq 0 ]

then

/usr/local/haproxy/sbin/haproxy -f /usr/local/haproxy/conf/haproxy.cfg

sleep 3

if [ `ps -C haproxy --no-header |wc -l` -eq 0 ]

then

/etc/init.d/keepalived stop

fi

fi


[root@Haproxy-1 ~]# chmod +x /etc/keepalived/check_haproxy.sh


[root@Haproxy-1 ~]# service keepalived start

[root@Haproxy-2 ~]# service keepalived start


5.1、测试VIP地址

[root@Haproxy-1 ~]# ip addr show dev eth0

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

    link/ether 00:0c:29:cc:18:a2 brd ff:ff:ff:ff:ff:ff

    inet 192.168.200.201/24 brd 192.168.200.255 scope global eth0

    inet 192.168.200.254/32 scope global eth0

    inet6 fe80::20c:29ff:fecc:18a2/64 scope link 

       valid_lft forever preferred_lft forever


[root@Haproxy-1 ~]# /etc/init.d/keepalived stop

停止 keepalived:                                          [确定]


[root@Haproxy-2 ~]# ip addr show dev eth0

2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000

    link/ether 00:0c:29:fd:8a:4e brd ff:ff:ff:ff:ff:ff

    inet 192.168.200.204/24 brd 192.168.200.255 scope global eth0

    inet 192.168.200.254/32 scope global eth0

    inet6 fe80::20c:29ff:fefd:8a4e/64 scope link 

       valid_lft forever preferred_lft forever

  

5.2、测试Haproxy健康检查   

[root@Haproxy-1 ~]# service haproxy stop

Shutting down haproxy:                                     [确定]

[root@Haproxy-1 ~]# service haproxy status

haproxy (pid 59717) 正在运行...

  

  

5.3 网页测试:

用浏览器打开 http://192.168.200.254

再次打开一个新的浏览器再次访问 http://192.168.200.254



可以验证两次访问到的结果分别为:

server 192.168.200.202

server 192.168.200.203







END

本文出自 “微清凉风的博客” 博客,请务必保留此出处http://amunlinux.blog.51cto.com/13112118/1950265

Haproxy + keepalived 高可用负载均衡解决方案

标签:haproxy + keepalived

原文地址:http://amunlinux.blog.51cto.com/13112118/1950265

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