Uncaught PHP Exception MongoDB\Driver\Exception\AuthenticationException: "Authentication failed."

Question

Description:

I'm trying to drop a mongo collection in my Symfony application, however I get an "authentication fails" when I try to drop a collection. I'm able to select a database and I'm able to select a collection.

The mongoUrl connection string that I inject into my MongoService uses the same credentials specified in my docker compose:

mongodb://root:XXX@redaph_mongo_1:27017

Note: That even when I put in the wrong credentials I'm still able to select a database and collection without any error being thrown.

Question:

Why am I getting "Authenticaion Fails" when I try to drop a collection when I'm using root credentials? How do I correctly authenticate with the root username and password?

Error:

[2018-06-21 08:45:41] request.CRITICAL: Uncaught PHP Exception MongoDB\Driver\Exception\AuthenticationException: "Authentication failed." at /var/www/redaph/vendor/mongodb/mongodb/src/Operation/DropCollection.php line 108 {"exception":"[object] (MongoDB\Driver\Exception\AuthenticationException(code: 11): Authentication failed. at /var/www/redaph/vendor/mongodb/mongodb/src/Operation/DropCollection.php:108)"} []

Relevant code:

docker-compose.yml snippet

version '3':
  services:
    mongo:
      image: mongo
      restart: always
      environment:
        MONGO_INITDB_ROOT_USERNAME: root
        MONGO_INITDB_ROOT_PASSWORD: "XXX"
      volumes:
        - mdb_data:/data/db

MongoService.php snippet:

class MongoService
{
    const QUESTION_RESPONSE_COLLECTION = "question_response";
    const DATABASE_NAME = "redaph";
    private $mongoDB;

    public function __construct($mongoUrl)
    {
        $mongoClient = new MongoClient($mongoUrl);

        $this->mongoDB = $mongoClient->selectDatabase(self::DATABASE_NAME);

    }

    private function getQuestionResponseCollection(){
        return $this->mongoDB->selectCollection(self::QUESTION_RESPONSE_COLLECTION);
    }


    public function generateQuestionResponses(){

        /** code here to populate $questionResponses **/

        $collection = $this->getQuestionResponseCollection();
        #-> Authentication Fails Here
        $collection->drop();
        $results = $collection->insertMany($questionResponses);
        return $results->getInsertedCount();
    }

    public function getQuestionResponses(){
        return $this->getQuestionResponseCollection()->find([]);
    }
}

kemicofa ghost kemicofa ghost · Accepted Answer · 2018-06-23T15:03:36

After a thorough investigation on the matter, I changed how my MongoService worked and I emptied my mongo volume.

The main issue was that I had changed the password a while back after creating the container.

MongoService.php

class MongoService
{
    const QUESTION_RESPONSE_COLLECTION = "question_response";
    const DATABASE_NAME = "redaph";
    private $mongoDB;

    public function __construct($mongoUrl, $mongoUsername, $mongoPassword)
    {
        $mongoClient = new MongoClient($mongoUrl, ["authMechanism" => "SCRAM-SHA-1", "username" => $mongoUsername, "password" => $mongoPassword]);
        $this->mongoDB = $mongoClient->selectDatabase(self::DATABASE_NAME);
    }
}

services.yml

parameters:
    locale: 'en'
    env(MONGO_URL): 'mongodb://127.0.0.1:27107'
    env(MONGO_USERNAME): ''
    env(MONGO_PASSWORD): ''
services:
    App\Service\MongoService:
        arguments:
            $mongoUrl: '%env(resolve:MONGO_URL)%'
            $mongoUsername: '%env(resolve:MONGO_USERNAME)%'
            $mongoPassword: '%env(resolve:MONGO_PASSWORD)%'