前言* Nginx已经具备Squid所拥有的Web缓存加速功能、清除指定URL缓存的功能。而在性能上,Nginx对多核CPU的利用,胜过Squid不少。另外,在反向代理、负载均衡、健康检查、后端服务器故障转移、Rewrite重写、易用性上,Nginx也比Squid强大得多。这使得一台Nginx可以同时作为“负载均衡服务器”与“Web缓存服务器”来使用。
一、 安装nginx和ngx-purge
- ulimit -SHn 65535?
- yum install pcre pcre-devel -y 安装pcre?
- ?
- wget http://labs.frickle.com/files/ngx_cache_purge-1.4.tar.gz??
- tar zxvf ngx_cache_purge-1.4.tar.gz?
- wget http://nginx.org/download/nginx-1.0.11.tar.gz??
- tar zxvf nginx-1.0.11.tar.gz?
- cd nginx-1.0.11/?
- ./configure --user=www --group=www --add-module=../ngx_cache_purge-1.4 --prefix=/usr/local/nginx --with-http_stub_status_module --with-http_ssl_module?
- make && make install?
- cd ../
二、 配置nginx.conf文件如下配置文件
- user www www;?
- ?
- worker_processes 8;?
- ?
- error_log /data/logs/nginx/error.log crit;?
- ?
- pid /usr/local/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;?
- ?
- proxy_temp_path /data/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 /data/proxy_cache_dir levels=1:2 keys_zone=cache_one:200m inactive=1d max_size=30g;?
- ?
- upstream backend_server {?
- server 192.168.5.130:8080 weight=1 max_fails=2 fail_timeout=30s;?
- server 192.168.5.131:8080 weight=1 max_fails=2 fail_timeout=30s;?
- }?
- ?
- server?
- {?
- listen 80;?
- server_name www.abc.com 192.168.5.133;?
- index index.html index.htm;?
- root /data/webapps/www;?
- ?
- 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;?
- }?
- ?
- location ~ /purge(/.*)?
- {?
- #设置只允许指定的IP或IP段输入正确的密码才可以清除URL缓存。(Nginx限制目录访问,可以用apache
- 的htpasswd命令生成密钥文件,如:htpasswd -c /usr/local/nginx/conf/htpasswd adm_cache ,提示输入密码即可。)?
- auth_basic “Please Insert User And Password”;?
- auth_basic_user_file /usr/local/nginx/conf/htpasswd;?
- allow 127.0.0.1;?
- allow 192.168.1.0/24;?
- deny all;?
- proxy_cache_purge cache_one $host$1$is_args$args;?
- }?
- ?
- location ~ .*\.(php|jsp|cgi)?$?
- {?
- proxy_set_header Host $host;?
- proxy_set_header X-Forwarded-For $remote_addr;?
- proxy_pass http://backend_server;?
- }?
- log_format access ‘$remote_addr – $remote_user[$time_local] “$request” ‘?
- ‘$status $body_bytes_sent “$http_referer” ‘?
- ‘”$http_user_agent” $http_x_forwarded_for’;?
- access_log /data/logs/nginx/access.log access;?
- ? }?
- }
三、 启动nginx即可
- /usr/local/nginx/sbin/nginx 即可?
- 然后配置好resin端口设置为8080?
- 如果需要刷新缓存的url地址为:?
- http://192.168.5.133/purge/
如下图: