Chapter 12. Setting limits on brokers using the Kafka Static Quota plugin Important The Kafka Static Quota plugin is a Technology Preview only. Technology Preview features are not supported with Red Hat production service-level agreements (SLAs) and might not be functionally complete. Red Hat does not recommend implementing any Technology Preview features in production environments. This Technology Preview feature provides early access to upcoming product innovations, enabling you to test functionality and provide feedback during the development process. For more information about the support scope of Red Hat Technology Preview features, see Technology Preview Features Support Scope . Use the Kafka Static Quota plugin to set throughput and storage limits on brokers in your Kafka cluster. You enable the plugin and set limits by adding properties to the Kafka configuration file. You can set a byte-rate threshold and storage quotas to put limits on the clients interacting with your brokers. You can set byte-rate thresholds for producer and consumer bandwidth. The total limit is distributed across all clients accessing the broker. For example, you can set a byte-rate threshold of 40 MBps for producers. If two producers are running, they are each limited to a throughput of 20 MBps. Storage quotas throttle Kafka disk storage limits between a soft limit and hard limit. The limits apply to all available disk space. Producers are slowed gradually between the soft and hard limit. The limits prevent disks filling up too quickly and exceeding their capacity. Full disks can lead to issues that are hard to rectify. The hard limit is the maximum storage limit. Note For JBOD storage, the limit applies across all disks. If a broker is using two 1 TB disks and the quota is 1.1 TB, one disk might fill and the other disk will be almost empty. Prerequisites AMQ Streams is installed on all hosts which will be used as Kafka brokers. A ZooKeeper cluster is configured and running . Procedure Edit the /opt/kafka/config/server.properties Kafka configuration file. The plugin properties are shown in this example configuration. Example Kafka Static Quota plugin configuration # ... client.quota.callback.class=io.strimzi.kafka.quotas.StaticQuotaCallback 1 client.quota.callback.static.produce=1000000 2 client.quota.callback.static.fetch=1000000 3 client.quota.callback.static.storage.soft=400000000000 4 client.quota.callback.static.storage.hard=500000000000 5 client.quota.callback.static.storage.check-interval=5 6 # ... 1 Loads the Kafka Static Quota plugin. 2 Sets the producer byte-rate threshold. 1 MBps in this example. 3 Sets the consumer byte-rate threshold. 1 MBps in this example. 4 Sets the lower soft limit for storage. 400 GB in this example. 5 Sets the higher hard limit for storage. 500 GB in this example. 6 Sets the interval in seconds between checks on storage. 5 seconds in this example. You can set this to 0 to disable the check. Start the Kafka broker with the default configuration file. su - kafka /opt/kafka/bin/kafka-server-start.sh -daemon /opt/kafka/config/server.properties Verify that the Kafka broker is running. jcmd | grep Kafka

Commands:
client.quota.callback.class=io.strimzi.kafka.quotas.StaticQuotaCallback 1 client.quota.callback.static.produce=1000000 2 client.quota.callback.static.fetch=1000000 3 client.quota.callback.static.storage.soft=400000000000 4 client.quota.callback.static.storage.hard=500000000000 5 client.quota.callback.static.storage.check-interval=5 6
su - kafka /opt/kafka/bin/kafka-server-start.sh -daemon /opt/kafka/config/server.properties
jcmd | grep Kafka