How to pass the system environment variable to nginx.conf

Question

My question is how to pass the system environment variable to nginx.conf?

I define a system variable CLASSPATH in /etc/profile:

export CLASSPATH=$CLASSPATH:$HADOOP_HOME/bin/hadoop classpath --glob

And I define tow variables in nginx.conf:

env TEST_ENV=/usr/local/test;

env $CLASSPATH;

and print the variables by lua:

location /lua {

default_type text/html;

content_by_lua '

    ngx.say(os.getenv("TEST_ENV"));

    ngx.say(os.getenv("CLASSPATH"));

';

}

The results as below:

ngx.say(os.getenv("TEST_ENV")); ====> /usr/local/test

ngx.say(os.getenv("CLASSPATH")); ====> nil

Looks the env directive can't pass the system value to nginx.conf

Any suggestion?

Answer 1

This is how I do it using fastcgi and hopefully it'll be useful to you or anyone out there. My env variables are defined under /etc/environment. Note that after you define them you can use source /etc/environment to make them available to your session.

Let's take for example one of your variables. This would go under /etc/environment CLASSPATH=$HADOOP_HOME/bin/hadoop classpath

Once these have been defined in the system, for nginx I'd add the following within the location block: fastcgi_param CLASSPATH $CLASSPATH; include fastcgi_params;