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:1.4.21cd /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
listenchinaapp.sinaapp.com
bind *:80
mode http
option httplog
log global
option httpchk HEAD /index.html HTTP/1.0
server web1192.168.0.134:80 weight 5check inter 2000 rise 2 fall 3
server web2192.168.0.135:80 weight 5check 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
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
fiBACKUP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：
http://blog.运维网.com/attachment/201208/180520314.png
访问haproxy status如下图：
http://blog.运维网.com/attachment/201208/181453164.png
本文参考煮酒兄http://andrewyu.blog.运维网.com/1604432/669491 HAProxy+Keepalived高可用负载均衡配置
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