Configuring rolling restart checks

You can configure Cloudera Manager to perform different types of checks on Kafka brokers during a rolling restart. The type of check performed by Cloudera Manager is configured with the Cluster Health Guarantee During Rolling Restart property. The property has multiple settings, each setting corresponds to a different type of check.

The following steps walk you through the basic configuration method of how you can enable and configure rolling restart checks.

If your Kafka service is configured to use custom listeners, complete Configuring the client configuration used for rolling restart checks before continuing with this task.

In Cloudera Manager, select the Kafka service.
Go to Configuration.
Find and configure the Cluster Health Guarantee During Rolling Restart property.
Select one of the available options. Click the ? icon next to the property name to reveal a full description of each option and the check to which they correspond.
Cloudera recommends that you set this property to all partitions stay healthy to avoid service outages.
Optional: Fine-tune rolling restart check behaviour by configuring the following properties:
- Maximum Allowed Runtime For Kafka Broker Rolling Restart Check
- Retry Interval For Kafka Broker Rolling Restart Check
- Default API Timeout For Kafka Topics Client Used In Kafka Broker Rolling Restart Check
These properties allow you to configure different interval and timeout values related to the rolling restart check. Configure these properties based on your cluster and requirements.
Click Save Changes.
Restart the Kafka service.

Rolling restart checks are configured and enabled. During any subsequent rolling restarts, Cloudera Manager executes the type of check you configured.

If you make any configuration changes related to broker connectivity (security, listeners, port, bootstrap) after rolling restart checks are enabled, you must disable rolling restart checks for the first restart after the change was made. Otherwise, the check and the rolling restart might fail. Following the initial restart, you can re-enable rolling restart checks.