Server Fault Asked on December 20, 2021
I have a docker container that runs a php fastcgi application on port 9000
.
The root path is mounted at /var/www/my_app
and contains all assets like images and javascript.
I want to use nginx as a reverse proxy.
My current nginx configuration file looks like this:
server {
listen 80;
server_name my_app.example.org;
root /var/www/my_app;
index index.php index.html index.htm;
location / {
try_files $uri $uri/ =404;
}
location ~ .php$ {
fastcgi_param GATEWAY_INTERFACE CGI/1.1;
fastcgi_param SERVER_SOFTWARE nginx;
fastcgi_param QUERY_STRING $query_string;
fastcgi_param REQUEST_METHOD $request_method;
fastcgi_param CONTENT_TYPE $content_type;
fastcgi_param CONTENT_LENGTH $content_length;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_param SCRIPT_NAME $fastcgi_script_name;
fastcgi_param REQUEST_URI $request_uri;
fastcgi_param DOCUMENT_URI $document_uri;
fastcgi_param DOCUMENT_ROOT $document_root;
fastcgi_param SERVER_PROTOCOL $server_protocol;
fastcgi_param REMOTE_ADDR $remote_addr;
fastcgi_param REMOTE_PORT $remote_port;
fastcgi_param SERVER_ADDR $server_addr;
fastcgi_param SERVER_PORT $server_port;
fastcgi_param SERVER_NAME $server_name;
fastcgi_intercept_errors on;
fastcgi_index index.php;
fastcgi_pass my_app_upstream;
include fastcgi_params;
}
}
Unfortunately this is not working. I receive 404 errors for all sites/resources.
I was able to fix this by changing the config file to this:
server {
(...)
root /var/www/html; #changed
index index.php index.html index.htm;
location / {
root /var/www/my_app/; #changed
}
(...)
}
Why does it behave so strange? And is the second approach secure?
So your upstream has a different root path to the same files. What you are doing is setting the root to /var/www/my_app/
for static files (served by the nginx
instance) and setting $document_root
to /var/www/html
for the FastCGI instance.
You say it is working, so your static files must be available under /var/www/my_app/
and your PHP files must be available under /var/www/html
.
It would probably make more sense to structure it like this:
server {
...
root /var/www/my_app;
location / {
...
}
location ~ .php$ {
try_files $uri =404;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME /var/www/html$fastcgi_script_name;
root /var/www/html;
}
}
The special root for FastCGI is hardwired, but not before the presence of the files are checked with a try_files
to avoid Passing Uncontrolled Requests to PHP.
Answered by Richard Smith on December 20, 2021
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