语法配置

  1. Syntax: proxy_cache_path path;
  2. Default: —
  3. Context: http;
  1. Syntax: proxy_cache zone | off;
  2. Default: proxy_cache  off
  3. Context: http,server,location;

缓存过期周期

  1. Syntax: proxy_cache_valid [code...] time;
  2. Default: proxy_cache  off
  3. Context: http,server,location;

缓存的维度

  1. Syntax: proxy_cache_key string;
  2. Default: proxy_cache_key  $scheme$proxy_host$request_uri;
  3. Context: http,server,location;

示例

  1. upstream imooc {
  2.         server 116.62.103.228:8001;
  3.         server 116.62.103.228:8002;
  4.         server 116.62.103.228:8003;
  5. }
  6. proxy_cache_path /opt/app/cache levels=1:2 keys_zone=imooc_cache:10m max_size=10g inactive=60m use_temp_path=off; # 定义缓存路径，分缓存目录，开辟缓存空间及大小，缓存最大容量，超过多少分钟没被使用则清理缓存
  7. server {
  8.     listen       80;
  9.     server_name  localhost jeson.t.imooc.io;
  10.     #charset koi8-r;
  11.     access_log  /var/log/nginx/test_proxy.access.log  main;
  12.     location / {
  13.         proxy_cache imooc_cache; #缓存空间
  14.         proxy_pass http://imooc; #反向代理上游几个服务器
  15.         proxy_cache_valid 200 304 12h; # 返回状态码200,304时缓存12个小时
  16.         proxy_cache_valid any 10m; # 其它缓存10分钟
  17.         proxy_cache_key $host$uri$is_args$args; # key的定义
  18.         add_header  Nginx-Cache "$upstream_cache_status";  
  20.         proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504; # 防止其中一台服务错误影响到整个资源获取流程
  21.         include proxy_params;
  22.     }
  23.     error_page   500 502 503 504  /50x.html;
  24.     location = /50x.html {
  25.         root   /usr/share/nginx/html;
  26.     }
  27. }