MongoDB shell admin password reset

mongodb_pass_reset.md

• open mongod.conf

cd /etc/mongod.conf

• Comment security

#security:
#  authroization: "enabled"

• Restart mongodb

sudo service mongod stop
sudo service mongod start

• Run mongo

mongo

• Run these cmds

use admin
db.createUser({user:"admin",pwd:"password",roles:[{role:"root",db:"admin"}]});

• Enable auth again what you had commented in /etc/mongod.conf file (remove comments)

• Restart mongod service again

• DONE

Hi hanksu-deloitte:

I think that the steps to reset the root password for a 3-node MongoDB replica set can be done as follows:

Stop the MongoDB service on all nodes:

sudo service mongod stop

Start one of the MongoDB instances without authentication:

mongod --dbpath /var/lib/mongodb --port 27017 --bind_ip localhost --replSet yourReplicaSetName --fork --logpath /var/log/mongodb/mongod.log

Connect to the started MongoDB instance using mongosh:
mongosh --port 27017

In the MongoDB shell, execute the following commands to reset the root user's password:

use admin
db.updateUser("root", {pwd: "newpassword"});

Shut down the MongoDB instance:

mongosh admin --eval "db.shutdownServer()"

Restore the security settings in /etc/mongod.conf:

sudo nano /etc/mongod.conf
# Uncomment the security section
# security:
#   authorization: "enabled"

Restart the MongoDB service on all nodes:

sudo service mongod start

Check the replica set status to ensure all nodes are running correctly:

mongosh --username root --password newpassword --authenticationDatabase admin --eval "rs.status()"

By following these steps, you should be able to successfully reset the root password for your 3-node MongoDB replica set. Make sure to understand the potential risks and impacts of performing these operations.