NGINX:缓存服务
# wget http://labs.frickle.com/files/ngx_cache_purge-1.3.tar.gz//清缓存模块# tar zxvpf ngx_cache_purge-1.3.tar.gz -C ../software/
# cd /usr/local/src/software/nginx-1.0.2
# ./configure --user=nobody --group=nobody --prefix=/usr/local/nginx-1.0.2 --with-http_stub_status_module --with-http_ssl_module --add-module=../ngx_cache_purge-1.3
# mkdir -p /www/nginx/proxy_temp_path
# mkdir -p /www/nginx/proxy_cache_path
nginx.conf配置文件：
usernobody nobody;
worker_processes4;
error_loglogs/error.log crit;
pid logs/nginx.pid;
worker_rlimit_nofile 65535;
events {
use epoll;
worker_connections65535;
}
http {
server_tokens off;
include mime.types;
default_typeapplication/octet-stream;
server_names_hash_bucket_size 128;
sendfile on;
tcp_nopush on;
tcp_nodelay on;
keepalive_timeout65;
gzipon;
gzip_min_length 1k;
gzip_buffers4 16k;
gzip_http_version 1.0;
gzip_comp_level 2;
gzip_types text/plain application/x-javascript text/cssapplication/xml;
gzip_vary on;
upstream mysrv {
server 192.168.1.1:80 weight=1 max_fails=2 fail_timeout=30s;
server 192.168.1.2:80 weight=1 max_fails=2 fail_timeout=30s;
}
include vhost/*.conf;
}
aaa_example_com.conf配置文件：
server {
listen 80;
server_nameaaa.example.com;
index index.php index.html index.htm index.shtml;
log_format proxy '$remote_addr| $upstream_addr| $connection| $upstream_status| $time_local| $request|'
' $status|$body_bytes_sent|$bytes_sent|$http_referer|'
' $http_user_agent| $upstream_response_time| $msec| $request_time';
access_log logs/aaa_access.log proxy;
location /
{
proxy_pass http://mysrv;
proxy_set_header Host $host;
proxy_set_header X-Forwarded-For $remote_addr;
}
location ~ .*\.(gif|jpg|jpeg|png|bmp|swf|js|css)$
{
proxy_pass http://mysrv;
include proxy.conf;
}
location ~ /purge(/.*)
{
allow 127.0.0.1;
allow 192.168.1.0/24;
denyall;
proxy_cache_purge cache_one $host$1$is_args$args;
}
}
proxy.conf配置文件：
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;
client_max_body_size 50m; //允许客户端请求的最大单个文件字节数
client_body_buffer_size 256k;//缓冲区代理缓冲客户端请求的最大字节数
proxy_connect_timeout 30; //连接后端服务器超时时间
proxy_send_timeout 30; //后端服务器发送数据超时时间
proxy_read_timeout 60; //后端服务器响应请求超时时间
proxy_buffer_size 4k; //代理请求缓存区大小
proxy_buffers 4 32k;
proxy_busy_buffers_size 64k; //系统繁忙时可申请的proxy_buffers大小
proxy_temp_file_write_size 64k;//proxy缓存临时文件的大小
proxy_next_upstream error timeout invalid_header http_500 http_503 http_404; //故障转移
proxy_max_temp_file_size 128m;
proxy_temp_path /www/nginx/proxy_temp_path;
proxy_cache_path /www/nginx/proxy_cache_path levels=1:2 keys_zone=cache_one:200m inactive=1d max_size=1g;//设置web缓存区名称为cache_one，内存缓存空间为200m，自动清除超过1天没有被访问的缓存数据，硬盘缓存空间为1g
proxy_cache cache_one; //使用web缓存区cache_one
proxy_cache_valid200 304 12h;
proxy_cache_valid301 302 1m;
proxy_cache_validany 1m;
proxy_cache_key $host$uri$is_args$args;//设置web缓存的key值，nginx根据key值md5哈希存储缓存
proxy_set_header指令用于在向反向代理的后端web服务器发起请求时添加指定Header头信息，当后端web服务器上有多个基于域名的虚拟主机时，要通过添加Header头信息Host，来指定请求的域名，这样后端web服务器才能识别该反向代理访问请求由哪个虚拟主机来处理。
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