高性能服务器Haproxy+Nginx架构配置

前言* 随着负载均衡器的成熟，人们熟知的软件负载均衡如LVS、HAProxy，各方面性能不亚于硬件负载均衡，HAProxy提供高可用性、负载均衡以及基于TCP和HTTP应用的代理，支持虚拟主机，它是免费、快速并且可靠的一种解决方案。
HAProxy特别适用于那些负载特大的web站点，这些站点通常又需要会话保持或七层处理。
我们平时用的负载均衡LVS是基于四层，新型的大型互联网公司也在采用HAProxy，了解了haproxy大并发、七层应用等特点，那今天我们来研究一下HAProxy+Keepalived基于七层负载高可用负载均衡的配置。
一、系统环境：

系统版本：CentOS6.0 x86_64
HAProxy版本：1.4.21
Keepalived版本:1.2.1

Nginx版本：1.2.2
MASTER_IP:192.168.0.130
BACKUP_IP:192.168.0.131

VIP:192.168.0.133
WEB_1:192.168.0.134
WEB_2:192.168.0.135

二、HAProxy安装：
1）首先安装192.168.0.130上安装：
下载最新稳定版本:1.4.21

cd /usr/src  ;wget http://haproxy.1wt.eu/download/1.4/src/haproxy-1.4.21.tar.gz tar
xzf haproxy-1.4.21.tar.gz &&cd haproxy-1.4.21 &&make
TARGET=linux26 PREFIX=/usr/local/haproxy &&make install
PREFIX=/usr/local/haproxy

安装完毕，在/usr/local/haproxy/目录下会看到三个目录：doc、sbin、share
2) 接下来配置HAProxy。
cd /usr/local/haproxy ;mkdir -p etc/
然后在/usr/local/haproxy/etc/下新建haproxy.cfg文件，这里拷贝haproxy配置文件：

global

log 127.0.0.1   local0

maxconn 65535

chroot /usr/local/haproxy

uid 99

gid 99

daemon

nbproc 8

pidfile /usr/local/haproxy/haproxy.pid

defaults

log     127.0.0.1       local3

mode   http

option httplog

option httpclose

option dontlognull

option forwardfor

option redispatch

retries 2

maxconn 65535

balance source

stats   uri     /web-status

contimeout      5000

clitimeout      50000

srvtimeout      50000

listen  chinaapp.sinaapp.com

bind *:80

mode http

option httplog

log global

option httpchk HEAD /index.html HTTP/1.0

server web1  192.168.0.134:80 weight 5  check inter 2000 rise 2 fall 3

server web2  192.168.0.135:80 weight 5  check inter 2000 rise 2 fall 3

然后启动haproxy，如下执行启动命令：

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

[WARNING]
217/202150 (2857) : Proxy 'chinaapp.sinaapp.com': in multi-process
mode, stats will be limited to process assigned to the current request.

会提示如上信息，nbproc进程如果设置为1则不会提示，如果想去掉这个提示可以修改编译文件即可。 在源码配置src/cfgparse.c找到如下行

if (nbproc > 1) {
if (curproxy->uri_auth) {
-
Warning("Proxy '%s': in multi-process mode, stats will
be limited to process assigned to the current request.\n",

+
Warning("Proxy '%s': in multi-process mode, stats will
be limited to the process assigned to the current request.\n",

调整nbproc > 1数值即可。
三、安装Keepalived:

cd /usr/src ;
wget http://www.keepalived.org/software/keepalived-1.2.1.tar.gz 
tar xzf keepalived-1.2.1.tar.gz

cd keepalived-1.2.1 &&

./configure –with-kernel-dir=/usr/src/kernels/2.6.32-71.el6.x86_64/  &&make &&make install

DIR=/usr/local/
;cp $DIR/etc/rc.d/init.d/keepalived  /etc/rc.d/init.d/ && cp
$DIR/etc/sysconfig/keepalived /etc/sysconfig/ && mkdir -p
/etc/keepalived  && cp $DIR/sbin/keepalived /usr/sbin/

四、配置keepalived:

! Configuration File for keepalived

global_defs {

notification_email {

wgkgood@139.com

}

notification_email_from wgkgood@139.com

smtp_server 127.0.0.1

smtp_connect_timeout 30

router_id LVS_DEVEL

}

vrrp_script chk_haproxy {

script "/data/sh/check_haproxy.sh"

interval 2

weight 2

}

# VIP1

vrrp_instance VI_1 {

state BACKUP

interface eth0

lvs_sync_daemon_inteface eth0

virtual_router_id 151

priority 100

advert_int 5

nopreempt

authentication {

auth_typePASS

auth_pass 2222

}

virtual_ipaddress {

192.168.0.133

}

track_script {

chk_haproxy

}

}

五、创建haproxy脚本：
设置可执行权限chmod +x check_haproxy.sh，内容如下：

#!/bin/bash

#auto check haprox process

#2012-8-12 wugk

killall -0 haproxy

if

[[ $? -ne 0 ]];then

/etc/init.d/keepalived stop

fi

BACKUP同样如上配置haproxy、keepalived，配置完修改优先级为90即可，然后启动。

六、测试haproxy+keepalived：

如图当手动kill 掉131的haproxy进程后，130的keepalived后台日志显示如下，并且访问VIP 192.168.0.133 正常访问：




访问haproxy status如下图：



本文参考煮酒兄http://andrewyu.blog.51cto.com/1604432/669491 HAProxy+Keepalived高可用负载均衡配置
本文出自 “京峰教育-运维架构师培训” 博客，请务必保留此出处http://jfedu.blog.51cto.com/8172058/1686835