CODEWITHSUNDEEP
nginx
Ivy
Ivy

Reputation: 1

A variable in nginx.conf that changes when NGINX server is restarted

In the nginx.conf file, is there a variable that changes only when NGINX server is restarted?
Or how to implement a customized variable that changes only when NGINX server is restarted?

I have tried to use set directive and geo directive as follow:

set $timeStamp '$time_iso8601';

it will change with http request.

Could anyone help for this? Thanks!

Upvotes: 0

Views: 552

Answers (1)

Joshua DeWald
Joshua DeWald

Reputation: 3229

As far as I know there is not actually a variable containing this built into nginx.

I'm assuming that there is some outside system actually handling the restarts (or reloads, which is more common) themselves, something like systemd, supervisord, etc.

In that case, you can have a script that generates a file that sets the variable, which will be loaded when nginx reads the configuration.

For example, `/usr/local/nginx/conf/restart_var.conf' might contain:

set $custom_nginx_restart "2017-07-01 3:15:00Z";

You would include this in your server block.

The would just be generated by a script like:

echo "set \$custom_nginx_restart `date`;" > /usr/local/nginx/conf/restart_var.conf

Alternatively, you can generate something like:

map $http_host $custom_nginx_restart {
    default "2017-07-03 3:15:00Z";
}

This can then be included in your http block.

Note that this would apply both on reloads and restart.

Upvotes: 1

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