NGINX FastCGI Cache on NGINX > Apache > PHP-FPM

Richard1984 asked:

I had failed attempts earlier at getting Nginx Fast-CGI caching to work in Nginx > Apache > PHP-FPM config so I started fresh on a new server but am still having issues.

The server has a clean Ubuntu 16.04 install with Nginx 1.14.2, Apache 2.4.18 and PHP-FPM 5.6 (just for testing sake).

My /etc/nginx/nginx.conf config is stock as I’ve only made changes in vhost (anything outside server block is effectively nginx.conf).

My Nginx vhost config is:

fastcgi_cache_path /etc/nginx/cache levels=1:2 keys_zone=MYAPP:100m inactive=60m;
fastcgi_cache_key "$scheme$request_method$host$request_uri";
add_header X-Cache $upstream_cache_status;

server {
        listen   80;

        root /var/www/;
        index index.php index.html index.htm;

        server_name test.mysite.com;

        location / {
        try_files $uri $uri/ /index.php;
        }

        location ~ \.php$ {

        proxy_set_header X-Real-IP  $remote_addr;
        proxy_set_header X-Forwarded-For $remote_addr;
        proxy_set_header Host $host;
        proxy_pass http://127.0.0.1:8080;

        fastcgi_cache MYAPP;
        fastcgi_cache_valid 200 60m;
        }

         location ~ /\.ht {
                deny all;
        }
}

My apache2 test.mysite.com.conf is

<VirtualHost 127.0.0.1:8080>
        ServerName test.mysite.com
        DocumentRoot /var/www/
        ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined
        ProxyPassMatch ^/(.*\.php(/.*)?)$ unix:/run/php/php5.6-fpm.sock|fcgi://localhost/var/www/
</VirtualHost>

To test caching, I have following in /var/www/cachetest.php

<?php
echo time();
?>

However testing http://test.mysite.com/cachetest.php changes every second and consequently /etc/nginx/cache is always empty (its 777 for now).

Any ideas why cache isn’t working?

For testing sake, I want Nginx to cache every dynamic page regardless of cache-headers etc.

P.S. I have to use NGINX > Apache > PHP-FPM for now for htaccess (planning to ditch it in future)

My answer:


You can’t fastcgi_cache because you never fastcgi_pass to PHP-FPM.

In nginx, the cache is attached to a specific method of sending requests upstream, e.g. fastcgi, proxy, uwsgi, etc.

You can either use a proxy_cache instead, or better yet, just fastcgi_pass to PHP-FPM directly from nginx, and get rid of Apache as it’s redundant.


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