1、反向服务器配置

user www www;

worker_processes 8;
error_log /usr/local/webserver/nginx/logs/nginx_error.log crit;
pid /usr/local/webserver/nginx/nginx.pid;
#Specifies the value for maximum file descriptors that can be opened by this process.
worker_rlimit_nofile 65535;
events
{
use epoll;
worker_connections 65535;
}
http
{
include mime.types;
default_type application/octet-stream;
charset utf-8;
server_names_hash_bucket_size 128;
client_header_buffer_size 32k;
large_client_header_buffers 4 32k;
client_max_body_size 300m;
sendfile on;
tcp_nopush on;
keepalive_timeout 60;
tcp_nodelay on;
client_body_buffer_size 512k;
proxy_connect_timeout 5;
proxy_read_timeout 60;
proxy_send_timeout 5;
proxy_buffer_size 16k;
proxy_buffers 4 64k;
proxy_busy_buffers_size 128k;
proxy_temp_file_write_size 128k;
gzip on;
gzip_min_length 1k;
gzip_buffers 4 16k;
gzip_http_version 1.1;
gzip_comp_level 2;
gzip_types text/plain application/x-javascript text/css application/xml;
gzip_vary on;
#注：proxy_temp_path和proxy_cache_path指定的路径必须在同一分区
proxy_temp_path /tmp/proxy_temp_dir;
#设置Web缓存区名称为cache_one，内存缓存空间大小为200MB，1天没有被访问的内容自动清除，硬盘缓存空间大小为30GB。
proxy_cache_path /tmp/proxy_cache_dir levels=1:2 keys_zone=cache_one:200m inactive=1d max_size=30g;
upstream backend_server {
server 192.168.8.43:80 weight=1 max_fails=2 fail_timeout=30s;
server 192.168.8.44:80 weight=1 max_fails=2 fail_timeout=30s;
server 192.168.8.45:80 weight=1 max_fails=2 fail_timeout=30s;
}
server
{
listen 80;
server_name  192.168.8.42;
index index.html index.htm;
root /usr/local/nginx/html;
location /
{
#如果后端的服务器返回502、504、执行超时等错误，自动将请求转发到upstream负载均衡池中的另一台服务器，实现故障转移。
proxy_next_upstream http_502 http_504 error timeout invalid_header;
proxy_cache cache_one;
#对不同的HTTP状态码设置不同的缓存时间
proxy_cache_valid 200 304 12h;
#以域名、URI、参数组合成Web缓存的Key值，Nginx根据Key值哈希，存储缓存内容到二级缓存目录内
proxy_cache_key $host$uri$is_args$args;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_pass http://backend_server;
expires 1d;
}
#用于清除缓存，假设一个URL为http://192.168.8.42/test.txt，通过访问http://192.168.8.42/purge/test.txt就可以清除该URL的缓存。
location ~ /purge(/.*)
{
#设置只允许指定的IP或IP段才可以清除URL缓存。
allow 127.0.0.1;
allow 192.168.0.0/16;
deny all;
proxy_cache_purge cache_one $host$1$is_args$args;
}
#扩展名以.php、.jsp、.cgi结尾的动态应用程序不缓存。
location ~ .*\.(php|jsp|cgi)?$
{
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $remote_addr;
proxy_pass http://backend_server;
}
access_log off;
}
}

 

2、静态文件服务器分别配置（发布实际静态文件目录）

server {
        listen       80;
        server_name 192.168.8.43:;
 
        #charset koi8-r;
 
        #access_log logs/host.access.log main;
 
        location / {
         root   /usr/local/nginx/html;
         index index.html index.htm;
      }
    }
 
 server {
        listen       80;
        server_name 192.168.8.44;
 
        #charset koi8-r;
 
        #access_log logs/host.access.log main;
 
        location / {
         root   /usr/local/nginx/html;
         index index.html index.htm;
      }
    }
   
       server {
        listen       80;
        server_name 192.168.8.45;
 
        #charset koi8-r;
 
        #access_log logs/host.access.log main;
 
        location / {
         root   /usr/local/nginx/html;
         index index.html index.htm;
      }
   }

3、清除静态文件缓存key

 

PURGE模块下载
tar zxvf ngx_cache_purge-1.3.tar.gz
在 nginx目录下编译
cd nginx-1.0.2
 ./configure --user=www --group=www --add-module=../ngx_cache_purge-1.3 --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_ssl_module
make
make install
 
 
 即可删除缓存key