Pull environment config values from environment variables

[regner]

The 12 factor app gives some good reasons for this: http://12factor.net/config

Having the config values in environment variables means only having to maintain one list of config values and not having to switch between different configs. It also makes putting the application into a Docker container a lot easier, which is what I am hoping to do. :)

[exodus4d]

Absolutely agree with you!
I´ll implement this as the new "default" in one of the next minor releases. If system vars are not set/found we use the environment.ini as fallback for those who are on a "shared hoster" or simply can´t set environment vars.
We need to add this check in here: https://github.com/exodus4d/pathfinder/blob/develop/app/main/controller/controller.php#L762

[exodus4d]

IMPORTANT: If you have a running installation, nothing has to be changed! This is just an alternative setup feature for your environment configuration

When I´m done with my testing, I´ll push the following changes to develop branch:

• added a panel to /setup route that shows the current environment configuration
  • the first row shows, were those configuration came from:
    • Config: environment.ini or
    • PHP: environment variables
  • environment conf vars are checked against a "white list"
  • missing vars will have a red [missing] label
  • sensitive values like secret keys, passwords,... are obscured
• Pathfinder will automatically check for existing PHP environment variables
  • if environment variables were not found -> envinment.ini is loaded and parsed for that variables (as before)

Who should use this?

• Anyone who uses git pull and does not want the "environment settings" (DB credentials,..) to be overwritten any time
• Anyone who want to keep the "environment settings" independent from this installation

---

Environment panel

Environment variables from Config: environment.ini (fallback)

Environment variables from PHP environment variables (priority)

---

Hint: All environment variables are prefixed with PF-ENV-.

Set PHP environment variable

Nginx (FastCGI)

PHP environment variables have to be passed as fastcgi_param to PHP: You should add a new *.config file to your PHP locationsection and create develop-pathfinder.conf.

location ~ \.php$ {
    try_files             $uri =404;
    include              nginx.fastcgi.conf;
    fastcgi_pass      php_farm;
    include              /var/www/environment/develop-pathfinder.conf;
}

• restart/reload Nginx

Apache (mod_php)

You can pass all environment variables by adding them to your .htaccess.
This is not tested yet, but it should work :)

    SetEnv     PF-ENV-URL         http://www.pathfinder-w.space
    SetEnv     PF-ENV-DEBUG        3

• restart apache

---

[Tupsi]

this breaks the cronjobs using the prefered method A mentioned in the wiki documenation (as the cli php does not have access to the nginx env variables and falls back to what is in evironment.ini).

[exodus4d]

"TCP socket" config and CACHE backend can be set by PHP environment vars

Updated: develop-pathfinder.conf
^^ Config example for Redis cache backend.

[exodus4d]

More information about new (optional) WebSocket setup: #420