Kafka Helm chart

The kafka helm chart is not maintained by CORD, but it is available online at: https://github.com/kubernetes/charts/tree/master/incubator/kafka

To install Kafka using the cord-kafka name run the following commands:

helm repo add incubator http://storage.googleapis.com/kubernetes-charts-incubator
helm install --version 0.13.3 \
             --set configurationOverrides."offsets\.topic\.replication\.factor"=1 \
             --set configurationOverrides."log\.retention\.hours"=4 \
             --set configurationOverrides."log\.message\.timestamp\.type"="LogAppendTime" \
             --set replicas=1 \
             --set persistence.enabled=false \
             --set zookeeper.replicaCount=1 \
             --set zookeeper.persistence.enabled=false \
             -n cord-kafka incubator/kafka

NOTE: Historically there were two kafka busses deployed (another one named voltha-kafka) but these have been consolidated.

Optional tool: viewing events with kafkacat

Optionally, you can deploy a kafkacat container to to listen for Kafka events and debug:

If you haven't done it yet, add the CORD repository to the list of your local repositories and update the repo index:

helm repo add cord https://charts.opencord.org
helm repo update

Then, you can proceed with the kafkacat installation:

helm install -n kafkacat cord/kafkacat

Once the container is up and running you can exec into the pod and run kafkacat to perform various diagnostic commands.

kubectl exec -it kafkacat-##########-##### bash

For a complete reference, please refer to the kafkacat guide

A few examples:

  • List available topics:
kafkacat -b cord-kafka -L
  • Listen for events on a particular topic:
kafkacat -b cord-kafka -C -t <kafka-topic>
  • Some example topics to listen on:
kafkacat -b cord-kafka -C -t xos.log.core
kafkacat -b cord-kafka -C -t xos.gui_events
kafkacat -b cord-kafka -C -t voltha.events
kafkacat -b cord-kafka -C -t onu.events
kafkacat -b cord-kafka -C -t authentication.events
kafkacat -b cord-kafka -C -t dhcp.events

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