License Configurations for Confluent Platform

To manage Confluent Platform component licenses, set the confluent.license property and optional license-topic properties on each component. By default, Confluent Platform components use the _confluent-command topic to store license information.

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 for storing license information	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 for storing license information

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 for storing license information	String	`_confluent-command`	Any valid Kafka topic name	Custom topics aren’t automatically created. You 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 for storing license information	String	`_confluent-command`	Any valid Kafka topic name	Custom topics aren’t automatically created. You 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.