cat install.sh

#!/bin/bash
# https://github.com/helm/charts/tree/master/incubator/kafka

HELM_NAME=kafka-1
helm repo add incubator http://storage.googleapis.com/kubernetes-charts-incubator

helm upgrade --install ${HELM_NAME} incubator/kafka --version 0.16.2 -f values-staging.yaml

cat values-staging.yaml

# ------------------------------------------------------------------------------
# Kafka:
# ------------------------------------------------------------------------------

## The StatefulSet installs 3 pods by default
replicas: 3

## The kafka image repository
image: "confluentinc/cp-kafka"

## The kafka image tag
imageTag: "5.0.1"  # Confluent image for Kafka 2.0.0

## Specify a imagePullPolicy
## ref: http://kubernetes.io/docs/user-guide/images/#pre-pulling-images
imagePullPolicy: "IfNotPresent"

## Configure resource requests and limits
## ref: http://kubernetes.io/docs/user-guide/compute-resources/
resources: {}
  # limits:
  #   cpu: 200m
  #   memory: 1536Mi
  # requests:
  #   cpu: 100m
  #   memory: 1024Mi
kafkaHeapOptions: "-Xmx4G -Xms1G"

## The StatefulSet Update Strategy which Kafka will use when changes are applied.
## ref: https://kubernetes.io/docs/concepts/workloads/controllers/statefulset/#update-strategies
updateStrategy:
  type: "OnDelete"

## Start and stop pods in Parallel or OrderedReady (one-by-one.)  Note - Can not change after first release.
## ref: https://kubernetes.io/docs/tutorials/stateful-application/basic-stateful-set/#pod-management-policy
podManagementPolicy: OrderedReady

## If RBAC is enabled on the cluster, the Kafka init container needs a service account
## with permissisions sufficient to apply pod labels
rbac:
  enabled: false

affinity:
   podAntiAffinity:
     requiredDuringSchedulingIgnoredDuringExecution:
     - labelSelector:
         matchExpressions:
         - key: app
           operator: In
           values:
           - kafka
       topologyKey: "kubernetes.io/hostname"
   podAffinity:
     preferredDuringSchedulingIgnoredDuringExecution:
      - weight: 50
        podAffinityTerm:
          labelSelector:
            matchExpressions:
            - key: app
              operator: In
              values:
                - zookeeper
          topologyKey: "kubernetes.io/hostname"

## Configuration Overrides. Specify any Kafka settings you would like set on the StatefulSet
## here in map format, as defined in the official docs.
## ref: https://kafka.apache.org/documentation/#brokerconfigs
##

configurationOverrides:
  "default.replication.factor": 3
  "offsets.topic.replication.factor": 1 # Increased from 1 to 2 for higher output
  # "offsets.topic.num.partitions": 3
  "confluent.support.metrics.enable": false  # Disables confluent metric submission
  # "auto.leader.rebalance.enable": true
  # "auto.create.topics.enable": true
  # "controlled.shutdown.enable": true
  # "controlled.shutdown.max.retries": 100
  "message.max.bytes": "16000000" # Extend global topic max message bytes to 16 Mb

## Persistence configuration. Specify if and how to persist data to a persistent volume.
##

persistence:
  enabled: true

## Prometheus Exporters / Metrics
##

prometheus:
  ## Prometheus JMX Exporter: exposes the majority of Kafkas metrics
  jmx:
    enabled: true

  ## Prometheus Kafka Exporter: exposes complimentary metrics to JMX Exporter
  kafka:
    enabled: true
topics: []

# ------------------------------------------------------------------------------
# Zookeeper:
# ------------------------------------------------------------------------------

zookeeper:
  ## If true, install the Zookeeper chart alongside Kafka
  ## ref: https://github.com/kubernetes/charts/tree/master/incubator/zookeeper
  enabled: true

  "default.replication.factor": 3
  "offsets.topic.replication.factor": 1 # Increased from 1 to 2 for higher output
  # "offsets.topic.num.partitions": 3
  # "auto.leader.rebalance.enable": true
  # "auto.create.topics.enable": true
  "message.max.bytes": "16000000" # Extend global topic max message bytes to 16 Mb

$ kubectl get po | grep kafka

NAME                                                     READY   STATUS      RESTARTS   AGE
kafka-1-0                                                1/1     Running     0          224d
kafka-1-1                                                1/1     Running     0          224d
kafka-1-2                                                1/1     Running     0          224d
kafka-1-exporter-88786d84b-z954z                         1/1     Running     0          224d
kafka-1-zookeeper-0                                      1/1     Running     0          224d
kafka-1-zookeeper-1                                      1/1     Running     0          224d
kafka-1-zookeeper-2                                      1/1     Running     0          224d