How to clean up Kafka logs

The following steps illustrates the way to cleanup Kafka logs.
For any logs that appear to be overflowing and consuming disk space, you can use the following steps to clean up the logs from Kafka brokers 
Note: Make sure the team is informed before doing this activity. This activity will delete the Kafka topic data
Steps
1.Backup list of log file names and their disk consumption data (optional)
kubectl exec -it kafka-v2-0 -- du -h /opt/kafka-data/logs |tee backup_0.logs 
kubectl exec -it kafka-v2-1 -- du -h /opt/kafka-data/logs |tee backup_1.logs 
kubectl exec -it kafka-v2-2 -- du -h /opt/kafka-data/logs |tee backup_2.logs
2.Cleanup the logs
kubectl exec -it kafka-v2-0 -- rm -rf /opt/kafka-data/logs/* -n kafka-cluster  
kubectl exec -it kafka-v2-1 -- rm -rf /opt/kafka-data/logs/* -n kafka-cluster 
kubectl exec -it kafka-v2-2 -- rm -rf /opt/kafka-data/logs/* -n kafka-cluster
3. If the pod is in crashlookbackoff state, and the storage is full, use the following workaround:
Make a copy of the pod manifest
kubectl get statefulsets kafka-v2 -n kafka-cluster -oyaml > manifest.yaml
Scale down the Kafka statefulset replica count to zero
kubectl scale statefulsets kafka-v2 -n kafka-cluster --replicas=0
Make the following changes to the copy of the statefulsets manifest file
Modify the command line from:
containers:
- command:
  - sh
  - -exc
  - |
    export KAFKA_BROKER_ID=${HOSTNAME##*-} && \
    export KAFKA_ADVERTISED_LISTENERS=PLAINTEXT://${POD_NAME}.kafka-v2-headless.${POD_NAMESPACE}:9092,EXTERNAL://${HOST_IP}:$((31090 + ${KAFKA_BROKER_ID})) && \
    exec /etc/confluent/docker/run
 To
containers:
- command:
  - sh
  - -exc
  - |
    tail -f /dev/null
Apply this statefulsets manifest and scale up statefulsets replica count to 3, the pod should be in a running state now and follow [step 2].
Again scale down the Kafka statefulset replica count to zero
kubectl scale statefulsets kafka-v2 --replicas=0 -n kafka-cluster
Make the following changes to the copy of the statefulsets manifest file
Modify the command line from:
containers:
- command:
  - sh
  - -exc
  - |
    tail -f /dev/null
 To
containers:
- command:
  - sh
  - -exc
  - |
    export KAFKA_BROKER_ID=${HOSTNAME##*-} && \
    export KAFKA_ADVERTISED_LISTENERS=PLAINTEXT://${POD_NAME}.kafka-v2-headless.${POD_NAMESPACE}:9092,EXTERNAL://${HOST_IP}:$((31090 + ${KAFKA_BROKER_ID})) && \
    exec /etc/confluent/docker/run
Apply this statefulsets manifest and scale up statefulsets replica count to 3
Kafka Troubleshooting Guide
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Last modified 8mo ago