前言* Nginx已經具備Squid所擁有的Web緩存加速功能、清除指定URL緩存的功能。而在性能上,Nginx對多核CPU的利用,勝過Squid不少。另外,在反向代理、負載均衡、健康檢查、後端服務器故障轉移、Rewrite重寫、易用性上,Nginx也比Squid強大得多。這使得一臺Nginx可以同時作爲“負載均衡服務器”與“Web緩存服務器”來使用。
一、 安裝nginx和ngx-purge
- ulimit -SHn 65535
- yum install pcre pcre-devel -y 安裝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;
- #設置Web緩存區名稱爲cache_one,內存緩存空間大小爲200MB,1天沒有被訪問的內容自動清除,硬盤緩存空間大小爲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 /
- {
- #如果後端的服務器返回502、504、執行超時等錯誤,自動將請求轉發到upstream負載均衡池中的另一臺服務器,實現故障轉移。
- proxy_next_upstream http_502 http_504 error timeout invalid_header;
- proxy_cache cache_one;
- #對不同的HTTP狀態碼設置不同的緩存時間
- proxy_cache_valid 200 304 12h;
- #以域名、URI、參數組合成Web緩存的Key值,Nginx根據Key值哈希,存儲緩存內容到二級緩存目錄內
- 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(/.*)
- {
- #設置只允許指定的IP或IP段輸入正確的密碼纔可以清除URL緩存。(Nginx限制目錄訪問,可以用apache
- 的htpasswd命令生成密鑰文件,如:htpasswd -c /usr/local/nginx/conf/htpasswd adm_cache ,提示輸入密碼即可。)
- 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、 啓動nginx即可
- /usr/local/nginx/sbin/nginx 即可
- 然後配置好resin端口設置爲8080
- 如果需要刷新緩存的url地址爲:
- http://192.168.5.133/purge/
如下圖: