MongoDB quick install guide on Ubuntu with auth and a sample db

mongodb-install.md

MongoDB quick install guide

This setup will focus on the Ubuntu Linux distro.

The installation steps are detailed on the official site, at https://docs.mongodb.com/manual/administration/install-on-linux/

Install

$ sudo apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 9DA31620334BD75D9DCB49F368818C72E52529D4

$ echo "deb [ arch=amd64,arm64 ] http://repo.mongodb.org/apt/ubuntu bionic/mongodb-org/4.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-4.0.list

$ sudo apt-get update

$ sudo apt-get install -y mongodb-org

Run

Start service: $ sudo service mongod start
Check status: $ sudo service mongod status
Stop service: $ sudo service mongod stop

Note: On Windows it should be started with the auth param - $ mongod.exe --auth

Configure networking access

Depending on where you install MongoDB - container, VM, local - you may need to change the bind_ip property in order for the instance to be accessible from your dev machine.

Example values: bind_ip: 127.0.0.1, bind_ip: [127.0.0.1,192.168.100.101]

Edit /etc/mongod.conf

net:
    bindIp: 127.0.0.1
    port: 27017

Make sure that MongoDB is only accessible from the local network, not the Internet.

Configure authentication and users

The DB offers unrestricted access initially.
First create the needed users, then enable authentication and restart the mongod service.

Run the Mongo shell from the terminal:

$ mongo

Create admin and regular users in the Mongo shell:

> use admin

> db.createUser(
  {
    user: "dbadmin",
    pwd: "AdminPass123",
    roles: [{role: "userAdminAnyDatabase", db: "admin"}]
  }
)

> db.createUser(
  {
    user: "dbroot",
    pwd: "RootPass123",
    roles: ["root"]
  }
)

> db.createUser(
  {
    user: "user",
    pwd: "UserPass123",
    roles: [
        {role: "dbAdmin", db: "mydb"},
        {role: "readWrite", db: "mydb"}
    ]
  }
)

Enable authentication by editing /etc/mongod.conf

security:
    authorization: enabled

Restart the Mongo service:

$ service mongod restart

Example login with authenticated user

$ mongo

> use admin
> db.auth("user", "UserPass123")

Details on authentication: https://docs.mongodb.com/manual/tutorial/enable-authentication/
Details on roles: https://docs.mongodb.com/manual/core/security-built-in-roles/#all-database-roles

Create app database

To create a database in MongoDB, we just need to define a name and insert a document in it.

From the Mongo shell:

> use mydb
> db.mycollection.insert({name: "First insert to create the db and collection."});

The above commands translate to:

• switch to db named mydb or define it if not existing
• create mydb database
• create mycollection collection (the equivalent of a table in a relational DB)
• insert the document defined by the JSON {name: "First insert to create the db."}

For a quick tutorial on CRUD syntax, check out http://www.newthinktank.com/2015/12/mongodb-tutorial-2/

Tools

Robomongo: https://robomongo.org/