How to start a mongodb shell in docker container?

You can run the interactive mongo shell by running the following command:

docker run -it -p 28000:27017 --name mongoContainer mongo:latest mongo

Otherwise, if your container is already running, you can use the exec command:

docker exec -it mongoContainer mongo

The thing that I struggled too but found a solution:

docker pull mongo
docker run --name CONTAINERNAME --restart=always -d -p 8080:8080 mongo mongod --auth
sudo docker exec -i -t CONTAINERNAME bash
mongo
use admin
db.createUser({user:"user", pwd:"password", roles:[{role:"root", db:"admin"}]})
exit && exit

Now you have created a running Docker container with everything you need. Now if you want to connect from any client with an admin user, just run this

mongo -u "user" -p "password" HOSTIP --authenticationDatabase "admin"

Download the latest MongoDB Docker image from Docker Hub

sudo docker pull mongo

Now set up MongoDB container

docker run --name containername mongo

Interact with the database through the bash shell client

docker exec -it containername bash

Launch the MongoDB shell client

mongo

Extending and updating @vladzam answer and if your container is already running in docker, you can use the exec mongosh command with login and pass options like this:

docker exec -it database-dev mongosh -u "myLogin" -p "myPass"

Assuming you have mongo installed on your host computer, which was in my case when I asked this question years ago. This is an alternate way I tried: Open a new terminal

mongo 127.0.0.1:28000

Your mongo shell starts in this terminal now.