Nginxcaching，在miss / bypass上redirect

有没有可能设置nginxcaching（nginx_proxy_cache）以不同的方式处理MISS / BYPASS：

1. caching存在 – >使用它
2. cachingMISSed / BYPASSed / UPDATing – >redirect到后端服务器。

为什么我需要这个？

我有6个服务器与SATA驱动器上的静态mp4文件（所有克隆）。 并购买了新的固态硬盘来testing性能。

如果我使用标准的nginxcaching，是的，它会工作…几个小时后，它将从超载服务器下载1k x 10MB文件:)

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我试图实现：“服务器如果caching，redirect到后端（而不是BYPASS！），同时caching/更新”

正如在评论中所问，如果我访问不在caching中的URL，我会得到这样的回应：

GET http://xxx/content/mp4/yyy/zzz.mp4 HTTP/1.1 200 OK Server: nginx Date: Fri, 16 Dec 2016 23:44:54 GMT Content-Type: video/mp4 Content-Length: 25065219 Connection: keep-alive Last-Modified: Mon, 22 Jun 2015 02:34:00 GMT ETag: "55877418-17e7703" X-Cache-Status: MISS Accept-Ranges: bytes 

正如你所看到的，有我想要的“位置”字段。 而nginx目前通过自己的“传递”video文件到浏览器以及caching。 如果我再做一个请求，而它正在“更新”，它会再次传递。

我想真正有（不包括PHP /ruby等）是这样的回应：

 GET http://xxx/content/mp4/yyy/zzz.mp4 HTTP/1.1 200 OK Server: nginx Date: Fri, 16 Dec 2016 23:44:54 GMT Content-Type: video/mp4 Content-Length: 25065219 Connection: keep-alive Last-Modified: Mon, 22 Jun 2015 02:34:00 GMT ETag: "55877418-17e7703" X-Cache-Status: MISS Accept-Ranges: bytes Location: http://backend/content/mp4/yyy/zzz.mp4 

保持nginx将这个文件填充到caching中。

或者，也许它会更简单，以在Varnish中实现此行为？ 还没有尝试过。

nginx.conf

 s001:/etc/nginx# cat nginx.conf user XXX; pid /run/nginx.pid; worker_processes auto; error_log /var/log/nginx/error.log warn; worker_rlimit_nofile 30000; include /etc/nginx/modules-enabled/*.conf; events { worker_connections 2048; multi_accept on; } http { server_tokens off; include /etc/nginx/mime.types; default_type application/octet-stream; log_format ups '$remote_addr $host [$time_local] "$request" "$upstream_response_time"'; log_format IP '[$time_local] $http_referer $request $remote_addr'; log_format vhost '$remote_addr $host $remote_user [$time_local] "$request" $status $body_bytes_sent "$http_referer" "$request_body" "$http_user_agent" upstrea_response "$upstream_response_time"'; access_log /var/log/nginx/access.log vhost; sendfile on; sendfile_max_chunk 1m; tcp_nopush on; tcp_nodelay on; keepalive_timeout 65s; client_body_buffer_size 8k; client_max_body_size 80M; client_body_timeout 60s; large_client_header_buffers 4 16k; send_timeout 60s; types_hash_max_size 2048; gzip off; gzip_static off; gzip_proxied expired no-cache no-store private auth; gzip_vary on; gzip_min_length 1100; gzip_buffers 64 8k; gzip_comp_level 2; gzip_http_version 1.1; gzip_proxied any; gzip_types text/plain application/xml application/x-javascript text/css video/x-flv application/octet-stream video/mpeg video/mp4; server_names_hash_bucket_size 64; proxy_connect_timeout 60s; proxy_read_timeout 60s; proxy_buffering on; proxy_force_ranges on; proxy_http_version 1.1; proxy_ignore_headers X-Accel-Expires Expires Cache-Control; proxy_pass_request_headers on; upstream uHDDs { server 172.16.0.5; server 172.16.0.6; server 172.16.0.7; server 172.16.0.8; server 172.16.0.9; server 172.16.0.10; } add_header X-Cache-Status $upstream_cache_status; proxy_cache_path /mnt/ssd2/nginx_cache levels=1:2 keys_zone=ssd2_nginx_cache:256m max_size=400g inactive=72h use_temp_path=off; # proxy_cache_key $scheme$proxy_host$uri; proxy_cache_use_stale error timeout invalid_header updating http_500 http_502 http_503 http_504; proxy_cache_valid any 24h; proxy_cache_min_uses 1; proxy_cache_lock on; proxy_cache_lock_age 180s; proxy_cache_lock_timeout 100ms; include /etc/nginx/conf.d/*.conf; include /etc/nginx/sites-enabled/*; } 

启用站点-/ 0_default.conf

 server { listen 80 default; server_name XXX; charset utf8; root /home/XXX/www/s1; proxy_bind 172.16.1.1; proxy_cache_key $uri; proxy_cache_bypass $cookie_nocache $arg_nocache; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_set_header X-Forwarded-Proto $scheme; location ^~ /v/ { rewrite ^/v/(\w+)/(.+)$ /content/$2 break; proxy_cache ssd2_nginx_cache; proxy_pass http://172.16.0.5$uri?$args; } location ^~ /content/ { proxy_cache ssd2_nginx_cache; proxy_pass http://172.16.0.5$uri?$args; } location /nginx_status { stub_status on; access_log off; allow 127.0.0.1; deny all; } } 

 proxy_cache_valid 301 24h;