License Configurations for Confluent Platform

This topic describes the configuration parameters for Confluent Platform license management.

By default, all Confluent Platform components use the _confluent-command topic to store license information. You can configure each component with custom license topics and settings. This topic organizes the parameters by component.

To configure licenses, see Configure component licenses.

Kafka brokers

Name	Description	Type	Default	Valid Values	Edge Cases
`confluent.license`	The license string for the Kafka broker	String	N/A	Valid Confluent Platform license string	N/A
`confluent.license.topic`	Topic name where license information is stored	String	`_confluent-command`	Any valid Kafka topic name	Custom topics aren’t automatically created. You must manually create custom topics before startup. If the `_confluent-license` topic exists, the default changes to `_confluent-license` instead of `_confluent-command`
`confluent.license.topic.replication.factor`	Replication factor for the license topic	Integer	N/A	N/A	Only works with default topic `_confluent-command`
`confluent.license.topic.retry.backoff.min.ms`	Minimum time to wait before retrying topic operations	Long	N/A	N/A	Only works with default topic `_confluent-command`
`confluent.license.topic.retry.backoff.max.ms`	Maximum time to wait before retrying topic operations	Long	N/A	N/A	Only works with default topic `_confluent-command`
`confluent.license.topic.create.timeout.ms`	Timeout for creating the license topic	Long	N/A	N/A	Only works with default topic `_confluent-command`

Confluent Schema Registry

Name

Description

Type

Default

Valid Values

Edge Cases

confluent.license

The license string for Schema Registry

String

N/A

Valid Confluent Platform license string

N/A

confluent.license.topic

Topic name where license information is stored

String

_confluent-command

Any valid Kafka topic name

Custom topics aren’t automatically created. You must manually create custom topics before startup.

If the _confluent-license topic exists, the default changes to _confluent-license instead of _confluent-command

confluent.license.admin.replication.factor

Replication factor for the license topic

Integer

N/A

Only works with default topic _confluent-command

Kafka Connect

Name	Description	Type	Default	Valid Values	Edge Cases
`confluent.license`	The license string for Connect	String	N/A	Valid Confluent Platform license string	N/A
`confluent.topic`	Topic name where license information is stored	String	`_confluent-command`	Any valid Kafka topic name	Custom topics are NOT auto-created. Must manually create custom topics before startup
`confluent.topic.replication.factor`	Replication factor for the license topic	Integer	N/A	N/A	Only works with default topic `_confluent-command`

Confluent Replicator

Name	Description	Type	Default	Valid Values	Edge Cases
`confluent.license`	The license string for Replicator	String	N/A	Valid Confluent Platform license string	N/A
`confluent.topic`	Topic name where license information is stored	String	`_confluent-command`	Any valid Kafka topic name	Custom topics are NOT auto-created. Must manually create custom topics before startup
`confluent.topic.replication.factor`	Replication factor for the license topic	Integer	N/A	N/A	Only works with default topic `_confluent-command`

Confluent Control Center

Confluent Control Center Next Gen 2.3.0 and Later

Name	Description	Type	Default	Valid Values	Edge Cases
`confluent.license`	The license string for Confluent Control Center	String	N/A	Valid Confluent Platform license string	N/A
`confluent.controlcenter.command.topic`	Topic name where Confluent Control Center stores commands and license information	String	`_confluent-command`	Any valid Kafka topic name	N/A
`confluent.controlcenter.command.topic.replication`	Replication factor for the command topic	Integer	N/A	N/A	N/A
`confluent.controlcenter.command.topic.retention.ms`	Retention period for the command topic in milliseconds	Long	N/A	N/A	N/A

Confluent Control Center Versions Before Next Gen 2.3.0

Name	Description	Type	Default	Valid Values	Edge Cases
`confluent.license`	The license string for Confluent Control Center	String	N/A	Valid Confluent Platform license string	N/A
`confluent.controlcenter.command.topic`	Topic name where Confluent Control Center stores commands and license information	String	`_confluent-command`	Any valid Kafka topic name	If the topic name is `_confluent-command`, Control Center creates the topic with default retention and ignores the `retention.ms` configuration. If the topic name is custom, Control Center publishes alert metadata to the custom topic but publishes the license to `_confluent-command`. After restart, both use the custom topic, and the license published through the UI is lost.
`confluent.controlcenter.command.topic.replication`	Replication factor for the command topic	Integer	N/A	N/A	N/A
`confluent.controlcenter.command.topic.retention.ms`	Retention period for the command topic in milliseconds	Long	N/A	N/A	Ignored when the topic name is `_confluent-command`. The topic is created with default retention.