Quickstart: Create a database and connect to it

Learn how to create a Cloud Firestore with MongoDB compatibility database and connect to it with the mongosh tool.

Before you begin

1. If you haven't already, create a Firebase project: In the Firebase console , click Add project, then follow the on-screen instructions to create a Firebase project or to add Firebase services to an existing Google Cloud project.
2. Install the mongosh tool

Create a Cloud Firestore with MongoDB compatibility database and retrieve the connection string

1. In the Firebase console, go to the Firestore Database page.

   Go to Firestore Database

2. Click the database that you want to authenticate.
3. In the Explorer panel, click more_vert View more .
4. Select Connect using MongoDB tools .
5. Copy the connection string.

The connection string depends on the UID of the database (system-generated) and the location of database:

 UID 
. LOCATION 
.firestore.goog

Create a user for SCRAM authentication

In the Google Cloud console, create a new database user and assign the user Identity and Access Management permissions.

1. In the Google Cloud console, go to the Databases page.

   Go to Databases

2. Select the database from the list of databases.
3. In the navigation menu, click Auth .
4. Click Add User .
5. Enter a username.
6. Select an Identity and Access Management role for the user.
7. Click create. The database creates a user and shows you the user's generated password. Copy and save this password. You will not be able to retrieve this password later. .

Connect using mongosh

Use the connection string, username, and password to connect to your database, run mongosh locally with the following configuration options.

 mongosh 
  
 'mongodb:// USERNAME 
: PASSWORD 
@ CONNECTION_STRING 
:443/ DATABASE_ID 
?loadBalanced=true&authMechanism=SCRAM-SHA-256&tls=true&retryWrites=false' 

Replace the following:

• USERNAME : the name of the database user you created.
• PASSWORD : the generated password for the database user you created.
• CONNECTION_STRING : the database connection string.
• DATABASE_ID : a database ID

Once connected, you can create and read data, for example:

db.pages.insertOne({ message: "Hello World!"})
db.pages.find({})
exit

What's next

• See a list of supported features
• Learn about behavior differences in Cloud Firestore with MongoDB compatibility
• Learn about additional authentication methods