doc-exports/docs/dms/umn/kafka-ug-0003.html

Configuring Kafka Users

DMS supports access control list (ACL) for topics. You can differentiate user permissions by granting users different permissions in a topic.

This section describes how to create users, reset the password, and delete users with ciphertext access enabled. For details about how to grant topic permissions for users, see Configuring Kafka Topic Permissions.

The maximum number of users that can be created for a Kafka instance is 20 or 500. Check the console for the actual limit.

There are two ways to create a user on the console. Accordingly, there are two ways to reset the user's password:

• Initial user: The user set when ciphertext access is enabled for the first time. If you forget your password, reset it by referring to Resetting the Password (for the Initial User).
• Non-initial users: Users created on the Users page. If you forget your password, reset it by referring to Resetting the User Password (for Non-initial Users).

Prerequisites

• Ciphertext access has been enabled for the Kafka instance.
• Kafka users can be configured only for Kafka instances in the Running state.

Constraints

• This function is unavailable for single-node instances.
• Resetting a user password will interrupt services. Change the user password in the client configuration file or code as soon as possible.

Creating a User

1. Log in to the console.
2. Click in the upper left corner to select a region.
   

   Select the region where your Kafka instance is located.

3. Click Service List and choose Application > Distributed Message Service. The Kafka instance list is displayed.
4. Click the desired Kafka instance to view its details.
5. On the Users page, click Create User.
6. In the displayed Create User dialog box, set the username and password, and click OK.

   After the user is created, grant permissions to the user by referring to Configuring Kafka Topic Permissions.

Resetting the Password (for the Initial User)

1. Log in to the console.
2. Click in the upper left corner to select a region.
   

   Select the region where your Kafka instance is located.

3. Click Service List and choose Application > Distributed Message Service. The Kafka instance list is displayed.
4. Reset the password for the initial user in either of the following ways.
   • Choose More > Reset Kafka Password in the row containing the desired Kafka instance.
   • Click the desired Kafka instance to view its details. Choose More > Reset Kafka Password in the upper left corner.
   • Click the desired Kafka instance to view its details. On the Basic Information page, click Reset Password next to Username in the Connection section.
   • Click the desired Kafka instance to view its details. On the Users page, click Reset Password in the row containing the desired user.

5. Enter and confirm a new password, and click OK.
   • If the password is successfully reset, a success message is displayed.
   • If the password fails to be reset, a failure message is displayed. In this case, reset the password again. If you still fail to reset the password after multiple attempts, contact customer service.
   

   The system will display a success message only after the password is successfully reset on all brokers.

Resetting the User Password (for Non-initial Users)

1. Log in to the console.
2. Click in the upper left corner to select a region.
   

   Select the region where your Kafka instance is located.

3. Click Service List and choose Application > Distributed Message Service. The Kafka instance list is displayed.
4. Click the desired Kafka instance to view its details.
5. On the Users page, click Reset Password in the row containing the desired user.
6. Enter and confirm a new password, and click OK.
   • If the password is successfully reset, a success message is displayed.
   • If the password fails to be reset, a failure message is displayed. In this case, reset the password again. If you still fail to reset the password after multiple attempts, contact customer service.
   

   The system will display a success message only after the password is successfully reset on all brokers.

Deleting a User

1. Log in to the console.
2. Click in the upper left corner to select a region.
   

   Select the region where your Kafka instance is located.

3. Click Service List and choose Application > Distributed Message Service. The Kafka instance list is displayed.
4. Click the desired Kafka instance to view its details.
5. Delete a user in either of the following ways:
   • On the Users page, click Delete in the row containing the desired user.
   • On the Users page, select one or more users and click Delete above the list.
   

   The initial user set when ciphertext access is enabled for the first time cannot be deleted.

6. In the displayed Delete User dialog box, click OK to delete the user.

Parent topic: Configuring Kafka Access Control