nginx反向代理并负载后端apache

Question

nginx反向代理并负载后端apache

基于centos 5.4 x86-64

Nginx：192.168.1.100

Apache：192.168.1.135 192.168.1.136

一、安装nginx

#/usr/sbin/groupadd www

#/usr/sbin/useradd -g www www

#tar zxvf pcre-8.00.tar.gz

#cd pcre-8.00

#./configure

#make && make install

# tar zxvf nginx-0.8.54.tar.gz

# cd nginx-0.8.54

# ./configure --user=www --group=www
--prefix=/usr/local/webserver/nginx --with-http_stub_status_module

--with-http_ssl_module

# make && make install

#vi /usr/local/webserver/nginx/conf/nginx.conf

修改为

user www;

worker_processes 4;

worker_rlimit_nofile 65535;

events

{

use epoll;

worker_connections 65535;

}

http{

server_tokens off;

include mime.types;

default_type application/octet-stream;

access_log off;

error_log /dev/null;

server_names_hash_bucket_size 128;

client_header_buffer_size 32k;

large_client_header_buffers 4 32k;

sendfile on;

tcp_nopush on;

keepalive_timeout 120;

tcp_nodelay on;

gzip on;

gzip_min_length 1k;

gzip_buffers 4 16k;

gzip_http_version 1.0;

gzip_comp_level 2;

gzip_types text/plain application/x-javascript text/css application/xml;

gzip_vary on;

upstream php_server_apache {

server 192.168.1.135:80 weight=1 max_fails=2 fail_timeout=30s;

server 192.168.1.136:80 weight=1 max_fails=2 fail_timeout=30s;

}

include vhost/shop.yourdomain.conf;

}

#mkdir /usr/local/webserver/nginx/conf/vhost

#vim /usr/local/webserver/nginx/conf/vhost/shop.yourdomain.conf

server

{

listen 80;

server_name shop.yourdomain.com;

index index.html index.htm index.php;

root /data/www/app/shopmall/;

location /nginx {

stub_status on;

auth_basic "NginxStatus";

log_format access '$http_x_forwarded_for - $remote_user [$time_local] "$request"'

'$status $body_bytes_sent "$http_referer"'

'"$http_user_agent" $remote_addr';

access_log logs/shop.yourdomain.com_access.log access;}

location / {

location ~ .*\.(php|php5)?$ {

index index.php;

proxy_pass http://php_server_apache;

}

include proxy.conf;

if ( !-e $request_filename) {

proxy_pass http://php_server_apache;

}

location ~* \.(jpg|jpeg|gif|png|swf)$ {

if (-f $request_filename) {

root /data/www/app/shopmall/;

add_header X-Cache HIT;

expires 30d;

break;

}

}

location ~* \.( html|htm|js|css)$ {

if (-f $request_filename) {

root /data/www/app/shopmall/;

add_header X-Cache HIT;

expires 1d;

break;

}

}

}

error_page 500 502 503 504 /50x.html;

location = /50x.html {

root html;

}

#vim /usr/local/webserver/nginx/conf/proxy.conf

proxy_redirect off;

proxy_set_header Host $host;

proxy_set_header X-Real-IP $remote_addr;

proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;

client_max_body_size 50m;

client_body_buffer_size 256k;

proxy_connect_timeout 300;

proxy_send_timeout 300;

proxy_read_timeout 300;

proxy_buffer_size 4k;

proxy_buffers 4 32k;

proxy_busy_buffers_size 64k;

proxy_temp_file_write_size 64k;

proxy_next_upstream error timeout invalid_header http_500 http_503 http_404;

proxy_max_temp_file_size 128m;

#chown –R www.www /data/www

#chmod 755
-R /data/www

#chown –R /usr/local/webserver/nginx

#/usr/local/webserver/nginx/sbin/nginx

#echo “/usr/local/webserver/nginx/sbin/nginx” >> /etc/rc.local

访问shop.yourdomain.com（k可以本地hosts解析到192.168.1.100） 试试吧………………

BUG问题解决………………..
（经亲测可行）

Nginx和apache
搭配性能还是比较稳定的。但不乏有些bug问题要解决啊……….

①
Apache端获得的IP问题

你会发现默认的话apache获得的客户端ip地址为nginx服务器的IP

Apache端：

#vim httpd.conf

LoadModule rpaf_module  modules/mod_rpaf-2.0.so

#vim httpd-vhosts.conf

在虚拟主机里加上

RPAFenable On

RPAFproxy_ips 192.168.1.100

RPAFsethostname On

RPAFheader X-Forwarded-For

Nginx端已经在proxy.conf里定义了

②
、session丢失

Nginx简单轮训会导致session丢失，面对这种问题，一种可以将nginx调度算法换为ip_hash，这样负载的作用将没有意义，另一种可将session存在memcache里…..

#vim /usr/local/php/lib/php.ini

修改为

session.save_handler = memcache

session.save_path = "tcp://IP:11211"

③
、apache功能变更

由于apache只处理php，所以其自身多的功能也没必要了，安装像eaccelerator或xcache

优化缓存php

我的个人见解，忘大家多多指教