nginx 反向代理做cache配置
nginx 的cache功能需要第三方模块的支持：ngx_cache_purge下载地址：http://labs.frickle.com 或 https://github.com/FRiCKLE/ngx_cache_purge/
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[*]wget http://labs.frickle.com/files/ngx_cache_purge-1.3.tar.gz
[*]tar -zxvf ngx_cache_purge-1.3.tar.gz
[*]#nginx的源目录与ngx_cache_purge同级，现在需要重新编译nginx
[*]cd nginx-1.0.5
[*]sudo ./configure --add-module=../ngx_cache_purge-1.3 --with-http_stub_status_module --with-http_ssl_module --prefix=/usr/local/nginx
[*]sudo make
[*]sudo make install
修改nginx的config文件 view plaincopy
[*]cd /usr/local/nginx/conf
[*]sudo gedit nginx.conf
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[*]#usernobody;
[*]worker_processes1;
[*]
[*]
[*]#error_loglogs/error.log;
[*]#error_loglogs/error.lognotice;
[*]#error_loglogs/error.loginfo;
[*]
[*]
[*]#pid logs/nginx.pid;
[*]
[*]
[*]
[*]
[*]events {
[*] worker_connections1024;
[*]}
[*]
[*]
[*]
[*]
[*]http {
[*] include mime.types;
[*] default_typeapplication/octet-stream;
[*]
[*]
[*] #log_formatmain'$remote_addr - $remote_user [$time_local] "$request" '
[*] # '$status $body_bytes_sent "$http_referer" '
[*] # '"$http_user_agent" "$http_x_forwarded_for"';
[*]
[*]
[*] #access_loglogs/access.logmain;
[*]
[*]
[*] #sendfile on;
[*] #tcp_nopush on;
[*]
[*]
[*] #keepalive_timeout0;
[*] #keepalive_timeout65;
[*] #gzipon;
[*]
[*]
[*]
[*]
[*] server_names_hash_bucket_size 128; #指定服务器名称哈希表的框大小
[*]
[*]
[*] client_header_buffer_size 32k;
[*] large_client_header_buffers 4 128k; #以上两个是设定客户端请求的Header头缓冲区大小，对于cookie内容较大的请求，应增大改值。（400或414错误）
[*] client_max_body_size 8m; #允许客户端请求的最大单文件字节数
[*] client_body_buffer_size 32k; #缓冲区代理缓冲用户端请求的最大字节数，可以理解为保存到本地再传给用户
[*]
[*] proxy_connect_timeout 600; #nginx跟后端服务器连接超时时间(代理连接超时)
[*] proxy_read_timeout 600; #连接成功后，后端服务器响应时间(代理接收超时)
[*] proxy_send_timeout 600; #后端服务器数据回传时间(代理发送超时)
[*] proxy_buffer_size 32k; #设置代理服务器（nginx）保存用户头信息的缓冲区大小
[*] proxy_buffers 4 32k; #proxy_buffers缓冲区，网页平均在32k以下的话，这样设置
[*] proxy_busy_buffers_size64k; #高负荷下缓冲大小（proxy_buffers*2）
[*] proxy_temp_file_write_size1024m; #设定缓存文件夹大小，大于这个值，将从upstream服务器传递请求，而不缓冲到磁盘
[*] proxy_ignore_client_abort on; #不允许代理端主动关闭连接
[*]
[*]
[*] sendfile on;
[*] tcp_nopush on;
[*] keepalive_timeout 65;
[*] tcp_nodelay on;
[*] gzip on;
[*] gzip_min_length 1k;
[*] gzip_buffers 4 16k;
[*] gzip_http_version 1.0;
[*] gzip_proxied any;#前端是squid的情况下要加此参数，否则squid上不缓存gzip文件
[*] gzip_comp_level 2;
[*] gzip_types text/plain application/x-javascript text/css application/xml;
[*] gzip_vary on;
[*]
[*]
[*]
[*] server_tokens off;
[*]
[*]
[*] #注：proxy_temp_path和proxy_cache_path指定的路径必须在同一分区
[*] proxy_temp_path /cache/proxy_temp_path;
[*] #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/cache/proxy_cache_path levels=1:2 keys_zone=cache_one:200m inactive=1d max_size=30g;
[*]
[*]
[*]
[*] server {
[*] listen 8012;
[*] server_namelocalhost.net;
[*]
[*]
[*] #charset koi8-r;
[*]
[*]
[*] #access_loglogs/host.access.logmain;
[*]
[*]
[*] location / {
[*] root /var/www/nginx;
[*] indexindex.html index.htm;
[*] }
[*]
[*]
[*] #error_page404 /404.html;
[*]
[*]
[*] # redirect server error pages to the static page /50x.html
[*] #
[*] error_page 500 502 503 504/50x.html;
[*] location = /50x.html {
[*] root html;
[*] }
[*]
[*]
[*] # proxy the PHP scripts to Apache listening on 127.0.0.1:80
[*] #
[*] #location ~ \.php$ {
[*] # proxy_pass http://127.0.0.1;
[*] #}
[*]
[*]
[*] # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000
[*] #
[*] location ~ \.php$ {
[*] proxy_passhttp://127.0.0.1:8011;
[*] #fastcgi_paramSCRIPT_FILENAME/scripts$fastcgi_script_name;
[*] #include fastcgi_params;
[*] }
[*]
[*]
[*] #扩展名以.gif、.jpg、.css等结尾的静态文件缓存。
[*] location ~ .*\.(gif|jpg|jpeg|png|bmp|swf|js|css|mp3|mp4|flv|f4v|wmv|wma|mov)$
[*]
[*]
[*] {
[*] #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; #进行缓存，使用Web缓存区cache_one
[*] proxy_cache_valid 200 304 12h; #对不同的HTTP状态码设置不同的缓存时间
[*] proxy_cache_valid 301 302 1m;
[*] proxy_cache_valid any 1m;
[*] proxy_cache_key $host$uri$is_args$args;#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_set_headerHost $host;
[*] proxy_set_headerX-Real-IP$remote_addr;
[*] proxy_set_header X-Forwarded-For $remote_addr;
[*] proxy_set_header Accept-Encoding "none";#设定proxy_set_header Accept-Encoding '';
[*] # （或是后台服务器关闭gzip），这样这台机器才
[*] # 不会缓存被压缩的文件，造成乱码
[*] #proxy_set_header Accept-Encoding ""; #这个也可
[*] proxy_ignore_headers "Cache-Control" "Expires"; #这段配置加上后，proxy_cache就能支持后台设定的expires。
[*] #proxy_pass http://127.0.0.1:8011; #反向代理
[*] root /var/www/nginx;
[*] expires1h;
[*]
[*]
[*] }
[*] #设置只允许指定的IP或IP段才可以清除URL缓存。
[*] location ~ /purge(/.*){
[*] allow 127.0.0.1;
[*] allow 192.168.0.0/255;
[*] allow all;
[*] proxy_cache_purge cache_one $host$1$is_args$args;
[*] }
[*] # deny access to .htaccess files, if Apache's document root
[*] # concurs with nginx's one
[*] #
[*] #location ~ /\.ht {
[*] # denyall;
[*] #}
[*] }
[*] #测试不同域名绑定同一端口
[*] server {
[*] listen 8012;
[*] server_namelocalhost.com;
[*] location / {
[*] root /var/www/nginx2;
[*] indexindex.html index.htm;
[*] }
[*] error_page 500 502 503 504/50x.html;
[*] location = /50x.html {
[*] root html;
[*] }
[*] location ~ \.php$ {
[*] proxy_passhttp://127.0.0.1:8011;
[*] }
[*] }
[*]
[*] # another virtual host using mix of IP-, name-, and port-based configuration
[*] #
[*] #server {
[*] # listen 8000;
[*] # listen somename:8080;
[*] # server_namesomenamealiasanother.alias;
[*]
[*]
[*] # location / {
[*] # root html;
[*] # indexindex.html index.htm;
[*] # }
[*] #}
[*]
[*]
[*]
[*]
[*] # HTTPS server
[*] #
[*] #server {
[*] # listen 443;
[*] # server_namelocalhost;
[*]
[*]
[*] # ssl on;
[*] # ssl_certificate cert.pem;
[*] # ssl_certificate_keycert.key;
[*]
[*]
[*] # ssl_session_timeout5m;
[*]
[*]
[*] # ssl_protocolsSSLv2 SSLv3 TLSv1;
[*] # ssl_ciphersHIGH:!aNULL:!MD5;
[*] # ssl_prefer_server_ciphers on;
[*]
[*]
[*] # location / {
[*] # root html;
[*] # indexindex.html index.htm;
[*] # }
[*] #}
[*]
[*]
[*]}
到此为止完成了cache配置，现在测试，在/var/www/nginx下放一个1.mq3文件，然后访问它：http://localhost.net/1.mp3,再看看/cache下是否cache了文件，有则接近成功啦。
：P
下次再研究nginx负载均衡的配置。
摘自：http://blog.csdn.net/esinzhong/article/details/6656066
继续关注一下这方面的信息
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