Viewing and Modifying Basic Information of a Kafka Instance

After creating a Kafka instance, you can view the details or modify some parameters of it on the console as required. These parameters include the instance name, description, security group, and capacity threshold policy.

Notes and Constraints

Single-node instances do not support reconfiguration of Smart Connect and private network access.

Prerequisite

You can modify basic information of a Kafka instance when the instance is in the Running state.

Viewing Kafka Instance Details

Log in to the Kafka console.
Click in the upper left corner to select the region where your instance is located.

Search for a Kafka instance by specifying filters. You can filter instances by name, status, version, instance type, flavor, used/available space, maximum partitions, billing mode, AZ, instance ID, private connection address, public connection address, enterprise project, and resource tag. Only enterprise users can filter instances by enterprise projects. Table 1 describes the various possible statuses of a Kafka instance.

**Table 1** Kafka instance status description
Status	Description
Creating	The instance is being created.
Creation failed	The instance failed to be created.
Running	The instance is running properly. Only instances in the Running state can provide services.
Faulty	The instance is not running properly.
Starting	The status between Frozen and Running.
Restarting	The instance is being restarted.
Changing	The instance specifications or public access configurations are being modified.
Change failed	The instance specifications or public access configurations failed to be modified. You cannot restart, delete, or modify an instance in the Change failed state. Contact customer service.
Frozen	The instance is frozen.
Freezing	The status between Running and Frozen.
Upgrading	The instance is being upgraded.
Rolling back	The instance is being rolled back.
Binning	The instance is being moved to the recycle bin.
Binned	The instance is in the recycle bin.
Recovering	The instance is being recovered from the recycle bin.

Click the name of the desired Kafka instance and view detailed information about the instance on the Overview tab page.

Table 2 and Table 3 describe the parameters for connecting to a Kafka instance. For details about other parameters, see the Basic Information tab page of the Kafka instance on the console.

**Table 2** Connection parameters (SASL_SSL cannot be changed)
Section	Parameter	Description
Connection	Username	Username for accessing the instance with SASL_SSL enabled.
	Kafka SASL_SSL	Whether SASL_SSL is enabled. This function is unavailable for single-node instances.
	Security Protocol	Security protocol used by the instance with SASL_SSL enabled.
	SASL Mechanism	SASL mechanism used by the instance with SASL_SSL enabled.
	SSL Certificate	Click Download to download the SSL certificate for accessing the instance.
	Instance Address (Private Network)	Address for connecting to the instance when public access is disabled. The number of connection addresses is the same as that of brokers.
	Manager Address (Private Network)	Address for connecting to Kafka Manager when public access is disabled. Instances created since May 17, 2023 do not have this address.
	Manager Username	Username for connecting to Kafka Manager. Instances created since May 17, 2023 do not have this username.
	Public Access	Indicates whether public access has been enabled for the instance.
	Instance Address (Public Network)	Address for connecting to the instance when public access is enabled. This parameter is displayed only when public access is enabled.
	Manager Address (Public Network)	Address for connecting to Kafka Manager when public access is enabled. This parameter is displayed only when public access is enabled. Instances created since May 17, 2023 do not have this address.
	Intra-VPC Plaintext Access	Whether intra-VPC plaintext access is enabled.

**Table 3** Connection parameters (plaintext and ciphertext access)
Section	Parameter	Sub-Parameter	Description
Connection	Username	-	Username for accessing the instance with ciphertext access enabled.
	Private Network Access	Plaintext Access	Indicates whether plaintext access is enabled.
		Address (Private Network, Plaintext)	This parameter is displayed only after you enable Plaintext Access.
		Ciphertext Access	Indicates whether ciphertext access is enabled. This function is unavailable for single-node instances.
		Address (Private Network, Ciphertext)	This parameter is displayed only after you enable Ciphertext Access.
		Security Protocol	This parameter is displayed only after you enable Ciphertext Access.
	Public Network Access	Toggle switch	Indicates whether public access has been enabled.
		Plaintext Access	This parameter is displayed only when Public Access is enabled. Indicates whether plaintext access is enabled.
		Address (Public Network, Plaintext)	This parameter is displayed only after you enable Plaintext Access.
		Ciphertext Access	This parameter is displayed only when Public Access is enabled. Indicates whether ciphertext access is enabled. This function is unavailable for single-node instances.
		Address (Public Network, Ciphertext)	This parameter is displayed only after you enable Ciphertext Access.
		Security Protocol	This parameter is displayed only after you enable Ciphertext Access.
	SASL Mechanism	-	This parameter is displayed only after you enable Ciphertext Access.
	SSL Certificate	-	This parameter is displayed only when SASL_SSL is enabled. Click Download to download the SSL certificate for accessing the instance.

Modifying Basic Information of a Kafka Instance

Log in to the Kafka console.
Click in the upper left corner to select the region where your instance is located.
Click the desired instance to go to the instance details page.

Modify the following parameters if needed:

**Table 4** Modifiable Kafka parameters
Parameter	How to Modify	Result
Instance Name	Click , enter a new name, and click . Naming rules: 4–64 characters; starts with a letter; can contain only letters, digits, hyphens (-), and underscores (_).	The modification result is displayed in the upper right corner of the page.
Smart Connect	See Enabling Smart Connect and Disabling Smart Connect.	To check the progress and result of the current task, go to the Instance > Background Tasks page.
Description	Click , enter a new description, and click . 0 to 1024 characters.	The modification result is displayed in the upper right corner of the page.
Enterprise Project	Click , select a new enterprise project from the drop-down list, and click . Only for enterprise users. Modifying this parameter does not restart the instance.	The modification result is displayed in the upper right corner of the page.
Security Group	Click , select a new security group from the drop-down list, and click . Modifying this parameter does not restart the instance.	The modification result is displayed in the upper right corner of the page.
Private Network Access	See Configuring Plaintext or Ciphertext Access to Kafka Instances.	You will be redirected to the Background Tasks page, which displays the modification progress and result.
Public Access	See Configuring Kafka Public Access.	You will be redirected to the Background Tasks page, which displays the modification progress and result.
Capacity Threshold Policy	Click the desired policy. In the displayed Confirm dialog box, click OK. Modifying this parameter does not restart the instance. When the policies are triggered, messages may be deleted or cannot be produced.	You will be redirected to the Background Tasks page, which displays the modification progress and result.
Automatic Topic Creation	Enable/Disable this Automatic Topic Creation. In the displayed Confirm dialog box, click OK. Changing this option may restart the instance.	You will be redirected to the Background Tasks page, which displays the modification progress and result.
Cross-VPC Access	See Accessing Kafka Using a VPC Endpoint Across VPCs and Accessing Kafka in a Public Network Using DNAT.	The modification result is displayed in the upper right corner of the page.