Cluster Administration Roles

Authentication in MongoDB

Authentication in MongoDB ensures that only authorized users can access and manipulate data. MongoDB supports various authentication mechanisms, including SCRAM-SHA-256, which authenticates users based on their username and password. Roles are used to define the privileges and access levels of users, and these roles can be assigned at the database level or for specific collections. Authentication is enabled by default in MongoDB, requiring users to authenticate themselves before accessing any data. Configuration settings for authentication are specified in the MongoDB server configuration file (mongod.conf). MongoDB provides access control features to restrict access based on IP addresses. MongoDB supports TLS/SSL encryption for secure communication between clients and the server. Authentication mechanisms in MongoDB can be integrated with existing systems, such as LDAP or Active Directory, for centralized user management and authentication....

Built-In Roles

MongoDB provides several built-in roles to cater to different administrative and operational tasks. Some of the key built-in roles include:...

Database Administration Roles

dbAdmin: This role provides full administrative access to a specific database. Users with this role can perform administrative tasks such as creating and deleting collections and indexes, as well as managing user roles within the database. userAdmin: This role allows the management of users and roles within a specific database. Users with this role can create and delete users, as well as assign roles to users. clusterAdmin: This role provides full administrative access to the entire MongoDB cluster. Users with this role can perform administrative tasks at the cluster level, such as adding and removing shards, as well as managing replica sets. backup: This role allows users to perform backup operations on a specific database. Users with this role can create and restore backups of the database....

Cluster Administration Roles

clusterMonitor: Users with this role can view cluster-wide monitoring metrics and statistics, such as the status of replica sets and sharded clusters....

Backup and Restoration Roles

backup: Authorizes users to create backups of databases. restore: Enables users to restore databases from backups....

Creating a User-Defined Role

Define the Role: Determine the permissions and privileges the role should have, such as read or write access to specific databases or collections. Create the Role: Use the db.createRole() method to create the role, specifying the role’s name, privileges, and any other options....

Modify Access for an Existing User

To modify access for an existing user in MongoDB Here’s a step-by-step explanation with examples:...

Connect to MongoDB with Appropriate Privileges

Start MongoDB Shell: Start the MongoDB shell by running the mongo command in your terminal. Authenticate: Use the db.auth() method to authenticate with a user that has the appropriate privileges....

Conclusion

Security and integrity are critical for MongoDB databases. Authentication and authorization are key to ensuring this. By setting up strong authentication methods and using RBAC features effectively, MongoDB users can control who accesses data, manage user permissions, and protect sensitive information from unauthorized access. After reading the full article, you’ll be able to easily create a custom user role, modify access for an existing user, and connect to MongoDB with the right permissions....