MongoDB URI Authentication

The connection between Rocket.Chat and MongoDB instance is achieved using a MongoDB Connection String URI. MongoDB authentication is done with the username and password.

Adding the following snippet in your env does the trick.

MONGO_URL=mongodb://[username:password@]host1[:port1][,...hostN[:portN]][/[defaultauthdb][?options]]

In your container, passing in MONGO_URL and MONGO_OPLOG_URL with the right values for connection.

Depending on the password you're using, you might need to escape some characters, for example.. Please take a look at MongoDB documentation https://docs.mongodb.com/manual/reference/connection-string/

Your docker-compose.yml file should look like this

environment:
      - "MONGO_URL=mongodb://rctestuser:mymongopassword@mongo:27017/rocketchat?authSource=admin"
      - "MONGO_OPLOG_URL=mongodb://rctestuser:mymongopassword@mongo:27017/local?authSource=admin"

If using docker run, it should look like this:

docker run \                                                                                                                                                                                                                   -e "MONGO_URL=mongodb://rctestuser:mymongopassword@mongo:27017/rocketchat?authSource=admin" \
-e "MONGO_OPLOG_URL=mongodb://rctestuser:mymongopassword@mongo:27017/local?authSource=admin" \
rocketchat/rocket.chat:X.X.X

Mongo Authentication Role

If you are using mongo authentication you might also need to add the clustermonitor role to your user. This is a requirement in order for your instance to be able to use change streams.

Execute the following command replacing the users with that selected for your users.

admin = db.getSiblingDB("admin");
admin.grantRolesToUser('OPLOGUSER',[{ role: "clusterMonitor", db: "admin" }])
admin.grantRolesToUser('ROCKETUSER',[{ role: "clusterMonitor", db: "admin" }])