Learn how to scale KRaft nodes (KRaft Controllers) in a Streams Messaging
cluster.
Streams Messaging clusters that you provision with any of the default Streams
Messaging cluster definitions may include optional KRaft nodes. KRaft nodes house
the KRaft Controller roles. If your cluster includes KRaft nodes, the Kafka service
on the cluster is running KRaft mode and uses KRaft for metadata management instead
of ZooKeeper. The number of KRaft nodes in the cluster can be scaled. This is done
by adding nodes to or removing nodes from the KRaft Nodes host
group using the Resize action in Data Hub.
Ensure that the cluster, its hosts, and all its services are healthy.
Ensure that the Kafka brokers and KRaft Controllers are commissioned and
running.
Log in to the CDP web interface.
Go to Management Console > Data Hub Clusters.
Find and select the Data Hub cluster you want to scale.
Click Actions > Resize.
Select the kraft host group.
Set the desired size of the host group.
You can enter a number or use the plus and minus buttons to adjust the number
of nodes. Ensure that you set an odd number of nodes.
Optional: If you are upscaling the cluster, select an Adjustment
type based on your requirements.
Optional: If you are downscaling the cluster, select Force
downscale to forcibly remove hosts.
Click Resize.
Wait until the new nodes become available.
Access the Cloudera Manager instance managing the cluster.
Restart all services that have stale configurations.
