Nginx缓存服务配置语法
proxy_cache_path path kes_zone=name:size
[levels=levels]
[use_temp_path=on|off]
[inactive=time]
[max_size=size]
[manager_files=number]
[manager_sleep=time]
[manager_threshold=time]
[loader_files=number]
[loader_sleep=time]
[loader_threshold=time]
[purger=on|off]
[purger_files=number]
[purger_sleep=time]
[purger_threshold=time]
(http)
proxy_cache zone|off;
(http、server、location)
proxy_cache_valid [code..] time;
(http、server、location)
作用:缓存过期周期
proxy_cache_key string;
(http、server、location)
作用:缓存维度,默认:proxy_cache_key $scheme$proxy_host$request_uri
Nginx缓存服务配置案例
http{
upstream test {
server 192.168.10.10:8080 down;
server 192.168.10.10:8081 max_fails=1 fail_timeout=10s;
server 192.168.10.11:8080 backup;
}
proxy_cache_path /opt/app/cache levels=1:2 keys_zone=imooc_cache:10m max_size=10g inactive=60m use_temp_path=off;
server {
listen 80;
server_name location;
location / {
proxy_cache off;
proxy_pass http://test;
proxy_cache_valid 200 304 12h;
proxy_cache_valid any 10m;
proxy_cache_key $host$uri$is_args$args;
add_header Nginx-Cache "$upstream_cache_status";
proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
}
}
}
如何清理指定缓存
- 方法1:rm -rf 缓存目录内容
- 方法2:第三方扩展模块ngx_cache_purge
如何让部分页面不缓存
proxy_no-cache string ...;
(http、server、location)
server {
listen 80;
server_name location;
if ($request_uri ~ ^/(url3|login|register|password/reset)) {
set $cookie_nocche 1;
}
location / {
proxy_cache off;
proxy_pass http://test;
proxy_cache_valid 200 304 12h;
proxy_cache_valid any 10m;
proxy_cache_key $host$uri$is_args$args;
proxy_no_cache $cookie_nocche $arg_nocache $arg_comment;
proxy_no_cache $http_pragma $http_authorization;
add_header Nginx-Cache "$upstream_cache_status";
proxy_next_upstream error timeout invalid_header http_500 http_502 http_503 http_504;
}
}
大文件分片请求
slice size;
(http、server、location) 默认:slice 0
- 优势:
每个子请求收到的数据都会形成一个独立文件,一个请求断了,其他请求不受影响
- 缺点:
当文件很大或者slice很小的时候,可能会导致文件描述符耗尽等情况