I wish to reassign partitions in Kafka on scale in/scale out of nodes deployed on Kubernetes using helm charts.

I have written a python script which can perform the necessary actions. However, I wish to do the same using Helm charts itself without having to involve any additional scripts.

I was checking out the Helm charts for Kafka in the Helm Github repo.

I came across the configmap-config file inside their templates. I am very new to Helm. Hence, having difficulty in interpreting the YAML file.

Line numbers 39 and 40 have the following commands which is precisely what I am executing using my python scripts.

kafka-reassign-partitions --zookeeper {{ $zk }} --reassignment-json-file {{ $topic.name }}-increase-replication-factor.json --execute
kafka-reassign-partitions --zookeeper {{ $zk }} --reassignment-json-file {{ $topic.name }}-increase-replication-factor.json --verify

Can you please explain how can these lines be triggered using Helm charts itself without having to run any script.