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May 2022
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May 2022
May 2022
Jae_Hong
May 2022

Trying to setup MongoDB in Ubunutu VPS for a MERN app.
I’ve enabled authentication in the mongodb settings.
Set up the usernames with password with the roles of read and dbOwner of the target DB.
And I have the mongoURI string setup in the nodeJS server like this:
mongodb://${MONGO_USERNAME}:${MONGO_PASSWORD}@${MONGO_HOSTNAME}:${MONGO_PORT}/${MONGO_DB}?authSource={admindb}
In the dry run, without any data in the db, pm2 monit only shows:
“command find requires authentication”
Despite that, mongoURI string from above can log me into the mongo and mongo shell without propblem.
Is there something I’ve forgot?

2
Jack_WoehrMongoDB Creator
May 2022

I would guess you have not correctly set up roles for the MONGO_USERNAME.
A user can log into MongoDB but not be able to do very much if the user does not have certain roles.
If this is your problem, see Built-in Roles and Create a User.

Jae_Hong
May 2022

The roles are read and dbOwner.
Both roles should be able to use find function.

Jae_Hong
May 2022

authsource is admin, it’s a different db from MONGO_DB.

Jae_Hong
May 2022

The problem was resolved when readWrite role added to the user with database access.
Is it because of POST requests?

Jack_WoehrMongoDB Creator
May 2022

@Jae_Hong you said in your first post “In the dry run, without any data in the db”.
What sort of find() did you try without any data?
If the find() implied creating a collection in the empty db, I believe you would need readWrite.
Perhaps the problem was related to “without any data in the db”.

Closed on May 9, 2022

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