Nginx – SHOW VARIABLES equivalent for NGINX configuration variables

nginx

I help many of my clients out with their NGINX installs. I'd like to get a quick overview of all of the values of the NGINX variables, much like MYSQL does with SHOW VARIABLES: https://wow-ss.s3.amazonaws.com/HYkKlgW.png

I realize that the variables would change based on location and virtual host. I had an idea of outputting them via the add_header directive. I found that the method worked well with some variables. For instance, this would correctly output the document root path add_header var-document_root $document_root;

However, when I tried with a directive value instead of a variable, it didn't work; add_header var-server_names_hash_max_size server_names_hash_max_size; simply outputted: server_names_hash_max_size

Hoping I could get some direction with this. Thank you ahead of time

Best Answer

You can use the HTTP Echo Module to get access to individual nginx variables. Then you'd need to check out what variables are available, and then build your own route / page. There is no nginx equivalent of printenv however.

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After trying literally 10 different things and consulting with Fenn Bailey of http://fennb.com, I have to resort to the include solution, which seems to be the only thing that avoids code duplication and actually works.

I moved all directives from location / {} into their own file and did this:

location / {
  include /etc/nginx/vhosts/androidpolice-root.conf;
}

location ~* wpsf-(img|js)\.php {
  include /etc/nginx/vhosts/androidpolice-root.conf;
  proxy_ignore_headers "Set-Cookie" "Cache-Control";
}

At this point I'm quite shocked by nginx's inflexibility when it comes to ifs and conditionals - these things should be so trivial, yet they're not.

By the way, I'm on the latest nginx 1.1.17.

Nginx – How to pass custom parameters to PHP from Nginx

You can pass additional parameters via fastcgi_param directive. I'm sure because I used this funcionality.

My exemplary nginx config

server {
    server_name localhost;
    include     conf/defaults.conf;
    root        /var/www;

    location    ~* "\.php$" {
        fastcgi_param CRS "crs";
        include conf/fastcgi-php.conf;
    }                                           
}

And part of phpinfo() output:

...
_SERVER["USER"] fcgi
_SERVER["HOME"] /dev/null
_SERVER["FCGI_ROLE"]    RESPONDER
_SERVER["REMOTE_USER"]  no value
_SERVER["CRS"]  crs
_SERVER["QUERY_STRING"] no value

Best Answer

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