Flushing Kafka topics

You must have kafka to avoid issues related to restore the specified flushed out topic.

1. Run the following command to get Kafka topics.

   oc get kafkatopic |grep file-scan-topic

   Example output:

   File-scan-topic			isd	10	1	True

2. Run the following command to back up Kafka topic.

   oc get kafkatopic file-scan-topic -o yaml

   Example output:

   apiVersion: kafka.strimzi.io/v1beta2
   kind: KafkaTopic
   metadata:
     resourceVersion: '15457887'
     name: file-scan-topic
     namespace: ibm-data-cataloging
     ownerReferences:
       - apiVersion: spectrum-discover.ibm.com/v1alpha1
         kind: SpectrumDiscover
         name: discover-instance
         uid: 52fd9b6c-0823-4f88-b43d-525dd6992b1b
     labels:
       strimzi.io/cluster: isd-ssl
   spec:
     partitions: 10
     replicas: 1
   

3. Run the following command to delete the Kafka topic to flush the data.

   oc delete kafkatopic file-scan-topic

4. Run the following command to apply the backed-up YAML file on the cluster to recreate the topic until it deletes the Kafka topic.

   oc apply -f <topic.yaml>

   Example output:

   apiVersion: kafka.strimzi.io/v1beta2
   kind: KafkaTopic
   metadata:
     resourceVersion: '15457887'
     name: file-scan-topic
     namespace: ibm-data-cataloging
     ownerReferences:
       - apiVersion: spectrum-discover.ibm.com/v1alpha1
         kind: SpectrumDiscover
         name: discover-instance
         uid: 52fd9b6c-0823-4f88-b43d-525dd6992b1b
     labels:
       strimzi.io/cluster: isd-ssl
   spec:
     partitions: 10
     replicas: 1