How to give one user full access to MongoDB right after install?

Question

I just installed MongoDB 4.4 on Ubuntu 20.04. Now, I want one user with a password to have full access (create database, write to it, delete it, etc.) over TCP port 27017. How can I do this?

Answer 1

First, I changed 127.0.0.1 to 0.0.0.0 in /etc/mongodb.conf.

Then, I created a new user:

$ mongo
use admin
db.createUser({user:"admin",pwd:"foo",roles:[{role:"userAdminAnyDatabase",db:"admin"}]})

Then, added these lines to /etc/mongod.conf:

security:
  authorization: enabled

Then, restarted it:

$ sudo service mongod restart

Finally, I was able to connect to it both from the server and remotely (after adding TCP port 27017 to the list of inbound rules of my AWS EC2 security group):

$ mongo localhost:27017 -u admin -p foo