How to create read-only access for a user in MongoDB

Introduction:

In MongoDB, you can create read-only access for users by assigning appropriate roles that grant read-only privileges to the user. MongoDB provides several built-in roles that can be used to grant read-only access. The two most common built-in roles for read-only access are read and readAnyDatabase.

Prerequisite:

1. Server root login credentials.
2. Mongo DB credentials if it is authenticated.

Step 1:
Log in to your Ubuntu or Centos server as a user with sudo privileges.

$ ssh root@Ip

Login to Mongo Shell. If authenticated, please follow the below steps.
Then use admin.

$ mongo or $ mongo -u username -p –authenticationDatabase admin $ use admin

To create the read-only user.

$ db.createUser({ user: “testuser”, pwd: “password “, roles: [ { role: “dbAdmin”, db: “database” }, { role: “readAnyDatabase”, db: “admin” } ] })

Authenticate the user. If authentication is successful, the result will be 1. If authentication fails, you get an error.

$ db.auth(‘testuser’,’password’) $ exit

$mongo -u testuser -p or $ mongo -u testuser -p –authenticationDatabase admin

Following the steps mentioned above, we can create read-only access for users in MongoDB.