[feature request] mongodb authentication

[SamuelTJackson]

Hi,
it should be possible to set the mongodb username, password and authdb.

something like:

Environment variable	Configuration attribute
IOTA_MONGO_USER	mongodb.user
IOTA_MONGO_PASSWORD	mongodb.password
IOTA_MONGO_AUTH_DB	mongodb.authDB

[fgalan]

It sounds interesting and it shouldn't be complex (just a matter of using the new parameters in the point of the code in which the connection to MongoDB is done).

It would be great if somebody supporting the use case (i.e. using MongoDB server with authentication) could provide the implementation. We will be more than happy to review the pull request with this :)

Thanks for the feedback!

[SamuelTJackson]

I'm not an expert in javascript but this is my suggestion. Maybe it helps:

iotagent-node-lib/lib/commonConfig.js

Line 87 in 09048b9

'IOTA_AUTOCAST',

insert:

'IOTA_MONGO_USER',
'IOTA_MONGO_PASSWORD',
'IOTA_MONGO_AUTH_DB',

iotagent-node-lib/lib/commonConfig.js

Line 109 in 09048b9

'IOTA_MONGO_REPLICASET',

insert:

'IOTA_MONGO_USER',
'IOTA_MONGO_PASSWORD',
'IOTA_MONGO_AUTH_DB',

iotagent-node-lib/lib/commonConfig.js

Line 290 in 09048b9

insert:

if (process.env.IOTA_MONGO_USER) {
        config.mongodb.user = process.env.IOTA_MONGO_USER;
}

if (process.env.IOTA_MONGO_PASSWORD) {
        config.mongodb.password = process.env.IOTA_MONGO_PASSWORD;
}
if (process.env.IOTA_MONGO_AUTH_DB) {
        config.mongodb.authDB = process.env.IOTA_MONGO_AUTH_DB;
}

iotagent-node-lib/lib/model/dbConn.js

Line 197 in 09048b9

insert:

if (currentConfig.mongodb.user && currentConfig.mongodb.password) {
   currentConfig.username = currentConfig.mongodb.user;
   currentConfig.password = currentConfig.mongodb.password;
}

if (currentConfig.mongodb.authDB) {
  options.authDB = {auth_db: currentConfig.mongodb.authDB};
}

iotagent-node-lib/lib/model/dbConn.js

Line 91 in 09048b9

insert:

if (options.authDB) {
        var delimiter = options.replicaSet ? '&' : '?';
        url += delimiter + 'authSource=' + options.authDB.auth_db;
}

https://github.com/telefonicaid/iotagent-node-lib/blob/master/doc/installationguide.md add new varialbes:
| IOTA_MONGO_USER | mongodb.user |
| IOTA_MONGO_PASSWORD | mongodb.password |
| IOTA_MONGO_AUTH_DB | mongodb.authDB |

[fgalan]

Fixed by PR #846