How to use Symfony2 with MongoDB on cloudControl?

Question

I would like to use Symfony2 and MongoDB on a cloudControl (PaaS provider like heroku) container. Now Symfony2 supports the usage of MongoDB:

# app/config/config.yml
doctrine_mongodb:
    connections:
        default:
            server: mongodb://localhost:27017
            options: {}
    default_database: test_database
    document_managers:
        default:
            auto_mapping: true

And as MongoDB is a PaaS AddOn, I don't have static connection credentials. They're generated by the container. cloudControl offers this way to access the credentials in PHP:

$credfile = file_get_contents($_ENV['CRED_FILE'], false);
$credentials = json_decode($credfile, true);
$uri = $credentials["MONGOLAB"]["MONGOLAB_URI"];
$m = new Mongo($uri);
$db = $m->selectDB(myDbName);
$col = new MongoCollection($db, myCollection);

How can I get these dynamically fetched credentials into Symfony2's config.yml?

mkorszun · Accepted Answer · 2014-06-19 09:11:27Z

2

The solution would be to use Symfony2 Miscellaneous Configuration.

So, create app/config/credentials.php file with below content:

<?php
if (isset($_ENV['CRED_FILE'])) {

    // read the credentials file
    $string = file_get_contents($_ENV['CRED_FILE'], false);
    if ($string == false) {
        throw new Exception('Could not read credentials file');
    }

    // the file contains a JSON string, decode it and return an associative array
    $creds = json_decode($string, true);

    // overwrite config server param with mongolab uri
    $uri = $creds["MONGOLAB"]["MONGOLAB_URI"];
    $container->setParameter('doctrine_mongodb.connections.default.server', $uri);
}

Then in your app/config/config.yml add:

imports:
    - { resource: credentials.php }

Let me know if this solves your problem.

edited Jun 19, 2014 at 9:11

answered Jun 18, 2014 at 9:38

mkorszun

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6 Comments

dialogik Over a year ago

Looks really nice, will try that out. But btw: Why are you checking !empty($_SERVER['HTTP_HOST'])?

mkorszun Over a year ago

We have used it to distinguish between PaaS and local env - you can ignore it!

dialogik Over a year ago

Okay, and how about the $container? Is the container automatically available in that PHP file or do I have to inject it manually?

mkorszun Over a year ago

It should be automatically available.

dialogik Over a year ago

Yeah, just tested it. The $container is known and doesn't has to be injected. Wow, this is such an easy way. I used to dynamically set some parameters via Services and kernelListeners, but this is easy as hell; thanks a million!

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