Is there a SHOW VARIABLES equivalent for NGINX configuration variables?

Question

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

Answer 1

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.