Nginx 反向代理并缓存及缓存清除

#user  nobody;
worker_processes  1;

#error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

#pid        logs/nginx.pid;


events {
    worker_connections  1024;
}


http {
    log_format  main  ‘$remote_addr - $remote_user [$time_local] "$request" ‘
                      ‘$status $body_bytes_sent "$http_referer" ‘
                      ‘"$http_user_agent" "$http_x_forwarded_for"‘
              ‘$upstream_addr $upstream_status $request_time $upstream_response_time‘;


    access_log  /var/log/nginx/access.log main;
    error_log   /var/log/nginx/error.log;

    server_tokens off;
    include       mime.types;
    default_type  application/octet-stream;
    sendfile        on;
    tcp_nopush      on;
    client_max_body_size 10m;
    client_body_buffer_size 128k;

    proxy_connect_timeout 300;
    proxy_send_timeout 300;
    proxy_read_timeout 300;
    proxy_buffer_size 64k;
    proxy_buffers 4 512k;
    proxy_busy_buffers_size 512k;
    proxy_temp_file_write_size 512k;
    proxy_temp_path   /data/nginx/proxy_temp;
    proxy_cache_path  /data/nginx/proxy_cache levels=1:2 keys_zone=cache_one:2000m inactive=3d max_size=500g;

    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;

    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;

    upstream go {
        server www.cnblogs.com:80 weight=4;
        #server 42.121.252.58:80 weight=4;
    }

    server {

            listen    192.168.55.133:80;
            #server_name  www.cnblogs.com;
            access_log  /var/log/nginx/go.access.log main;
            error_log   /var/log/nginx/go.error.log error;


           location / {
                    proxy_cache cache_one;
                    #proxy_cache_valid  200 304 301 302 2h;
                    #proxy_cache_valid any 2h;
                    #expires 1d;
                    add_header X-Cache $upstream_cache_status;
                    proxy_pass  http://go;
                    proxy_cache_key    $uri$is_args$args;
           }

           location ~ /purge(/.*) {
               allow              127.0.0.1;
               allow              192.168.55.0/24;
               deny               all;
               proxy_cache_purge  cache_one $1$is_args$args;
        }

    }
}