# documentation:2.0:mongodbconfbackend
Keywords: documentation,2.0,mongodbconfbackend

# MongoDB configuration backends

MongoDB is a NoSQL database that can be used both for storing configuration and sessions. You need to install Perl MongoDB module to be able to use this backend.

See how to change configuration backend to change your configuration database.

## Configuration

To use a MongoDB backend, configure your `lemonldap-ng.ini` file (section configuration) :

- Choose MongoDB as type
- Set dbName and collectionName parameters if different than default values (llConfDB and configuration)
- Set host and if needed db_name username, password and ssl fields as follow.

Example :

    [configuration]
    type = MongoDB
    dbName = llConfDB
    collectionName = configuration
    host = 127.0.0.1:27017
    ssl = 1
    ; authentication parameters
    db_name = admin
    user = lluser
    password = llpassword

Optional parameters (see MongoDB::MongoClient man page)
Name | Comment | Example
--- | --- | ---
db_name | Admin database (dafault: admin) | admin
auth_mechanism | Authentication mechanism | PLAIN
auth_mechanism_properties |  |
connect_timeout | Connection timeout | 10000
ssl | Boolean or hash ref (default: 0) | 1
username | Username to use to connect | lluser
password | Password | llpassword

# Mini MongoDB howto

Just some commands needed to create collection and user:

    $ mongo
    connecting to: test
    > use configuration
    switched to db configuration
    > db.createCollection("configuration")
    ...
    > db.addUser({user:"lluser",pwd:"llpassword",roles:["readWrite"]})
    ...
    > exit
    bye
    $