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I have Nginx installed as a front end proxy for Apache, where Apache is servicing PHP and Nginx is servicing static files. I'm having a problem configuring Nginx to cache the output from PHP into a static file. I've tried with proxy_cache, but obviously I'm doing something wrong.

Here is my base configuration:

 server { listen 80; root /var/www/web; index index.php index.html index.htm; server_name web.com; location / { try_files $uri $uri/ /index.php; } # cache static files location ~* \.(jpg|jpeg|png|gif|ico|css|js)$ { expires 365d; access_log off; add_header Cache-Control public; } location ~ \.php$ { proxy_pass http://127.0.0.1:8080; # Set header to be what we requested proxy_set_header Host $host; # Set proxy_cache expiry time proxy_cache_valid 200 302 5m; proxy_cache_valid 404 1m; proxy_cache_valid 301 1h; # Need this for snooping with tcpdump (turns off upstream compression) proxy_set_header Accept-Encoding ""; # Set real IP header (needed for client IP detection in apache) proxy_set_header X-Real-IP $remote_addr; # Explicitly allow critical headers proxy_pass_header Set-Cookie; # Prevent 304 responses being returned from Apache and cached by nginx proxy_set_header If-None-Match ""; } location ~ /\.ht { deny all; } }
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set proxy_cache_path in your http{} - context and define your zone and parameters

http { ... proxy_cache_path /tmp/cache/blue blue:100m ...; proxy_cache_path /tmp/cache/white white:100m ...; ... }

set proxy_cache zone/off in corresponding server/location-context and your options as well

e.g. define your cache pathes globally and activate/deactivate for each server/location

location /blue { proxy_cache blue; proxy_cache_... } location /white { proxy_cache white; proxy_cache_... } location /red { proxy_cache off; proxy_cache_... }

beware, your cached files will be in binary format

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  • I'm still not able to get the cache working..the cache directory is always empty. (I've checked users and permissions on the directory, everything is ok). Here is my configuration: gist.github.com/SvenAlHamad/6397956 Commented Aug 31, 2013 at 12:45
  • your config seems ok. do you have any entries in your error.log? /var/cache must be readable by www-data (chmod 755) and /var/cache/nginx must be writable by www-data (chown). Commented Aug 31, 2013 at 14:21
  • everything is fine there...but I noticed one strange thing. When I open mysite/index.php the cache is not created, so I decided to create a test file, text.php and inside I just wrote 'hello'. When I open mysite/test.php the cache file is created inside /var/cache/nginx Here are the headers imgur.com/Ei5ri6v imgur.com/4RgDUnn Commented Aug 31, 2013 at 15:40
  • does the cache-control-header comes from apache too? stackoverflow.com/a/6077195. oh, and could you please change your answer to "how to configure proxy_cache?" Commented Aug 31, 2013 at 15:54
  • i asked to change the title of your question, not answer :) Commented Aug 31, 2013 at 16:20

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