Axual Kafka README

Overview

Axual Kafka is a Helm chart designed to deploy and manage a Strimzi-based Axual Kafka cluster with Kraft (Kafka Raft) mode for easy scalability and high performance. This chart simplifies the provisioning of Kafka clusters and related resources, making it highly customizable to suit diverse use cases.

Features

  • Kafka Kraft Support: Leverage Kafka’s built-in Raft protocol, eliminating the need for Zookeeper in your deployments.

  • Highly Configurable:

    • Advanced logging configurations (inline or external).

    • Optional Cruise Control for Kafka optimization.

    • Simple authorization with support for super users.

  • Observability:

    • Pre-configured Prometheus rules and alerts.

    • Integration with JMX Prometheus Exporter for fine-grained monitoring.

  • Template Expansion:

    • Ability to extend Kafka configurations using native Helm templating.

  • SSL & Security:

    • Cluster CA and client CA management.

    • SSL/TLS configuration for secure Kafka communication.

Prerequisites

Before using this chart, ensure the following are in place:

  1. Helm: Version 3 or above.

  2. Kubernetes Cluster: v1.22+ for compatibility with custom resource definitions (CRDs).

  3. Strimzi Operator: The Kafka Custom Resource and related operations are managed by Strimzi. Install the Strimzi operator version 0.49.1 in your Kubernetes cluster.

Log into the Axual Harbor Registry

helm registry login -u [your-user] registry.axual.io/axual-charts

Download the Dependencies

helm dependency update

Install Strimzi Operator

Check the versions you need from the Strimzi downloads page: https://strimzi.io/downloads/.

helm upgrade --install strimzi strimzi/strimzi-kafka-operator \
--version=0.49.1 \
--namespace kafka \
--set watchAnyNamespace=true \
--set kafka.image.registry=registry.axual.io \
--set kafka.image.repository=axual/streaming/strimzi \
--set image.imagePullSecrets='axualdockercred'

Install Axual Kafka

Click to open axual-kafka.values.yaml 
fullnameOverride: ""
nameOverride: ""

axual:
  sslPrincipalBuilder:
    enabled: false
    addChainedSuperUsers: false
    chain: []
      #- "CN=Axual Dummy Root 2018"
      #- "CN=Axual Dummy Intermediate 2018 01"

kafkaNodePools:
  controller:
    name: ""
    replicas: 1
    roles:
      - "controller"
    jvmOptions: {}
    resources: {}
    storage:
      type: jbod
      volumes:
        - id: 0
          type: persistent-claim
          size: 1Gi
          deleteClaim: false
  broker:
    name: ""
    replicas: 1
    roles:
      - "broker"
    jvmOptions: {}
    resources: {}
    storage:
      type: jbod
      volumes:
        - id: 0
          type: persistent-claim
          size: 1Gi
          deleteClaim: false

kafka:
  annotations: {}
  enabled: true
  rack:
    enabled: false
    topologyKey: topology.kubernetes.io/zone
  metrics: false
  logging:
#    Possible values are 'external', 'inline'
    type: inline
#    Below external config is only used when the type is external
    externalConfig: |-
      # Root logger configuration
      rootLogger.level = INFO
      rootLogger.appenderRefs = console
      rootLogger.appenderRef.console.ref = CONSOLE
    
      # Console appender with 
      appender.console.type = Console
      appender.console.name = CONSOLE
      appender.console.target = SYSTEM_OUT
    
      # Console layout configuration
      # appender.console.layout.type = PatternLayout
      # appender.console.layout.pattern = [%d] %p %m (%c)%n
      appender.console.layout.type = JsonTemplateLayout
      appender.console.layout.eventTemplateUri = classpath:LogstashJsonEventLayoutV1.json
    
      # Logger configurations
      logger.kafka_controller.name = kafka.controller
      logger.kafka_controller.level = TRACE
    
      logger.kafka_network_processor.name = kafka.network.Processor
      logger.kafka_network_processor.level = FATAL
    
      logger.kafka_request_channel.name = kafka.network.RequestChannel$
      logger.kafka_request_channel.level = WARN
    
      logger.kafka_common_selector.name = org.apache.kafka.common.network.Selector
      logger.kafka_common_selector.level = WARN
    
      logger.kafka_request_logger.name = kafka.request.logger
      logger.kafka_request_logger.level = WARN
    
      logger.kafka_apis.name = kafka.server.KafkaApis
      logger.kafka_apis.level = FATAL
    
      logger.state_change.name = state.change.logger
      logger.state_change.level = TRACE
    
      logger.kafka_authorizer.name = kafka.authorizer.logger
      logger.kafka_authorizer.level = WARN

    loggers: {}
#      kafka.root.logger.level: "INFO"
#      log4j.rootLogger: "INFO"
#      log4j.logger.kafka.controller: "TRACE"
#      log4j.logger.kafka.network.Processor: "FATAL"
#      log4j.logger.kafka.network.RequestChannel$: "WARN"
#      log4j.logger.kafka.request.logger: "WARN"
#      log4j.logger.kafka.server.KafkaApis: "FATAL"
#      log4j.logger.state.change.logger: "TRACE"

  kafkaExporter:
    enabled: false
    spec: 
      groupRegex: .*	
      logging: info	
      topicRegex: .*
  authorization:
    superUsers:
      - "CN=Platform Manager,OU=Axual,O=Axual,C=NL"

  listeners:
    internal:
      type: internal
      authentication:
        type: tls
      tls: true
      port: 9093
    external:
      type: ingress
      authentication:
        type: tls
      tls: true
      port: 9094
      configuration: 
        bootstrap:
          annotations: {}
          host: "bootstrap-kafka.<domain>"
        brokers:
          - broker: 0
            host: "kafka-0.<domain>"
            annotations: {}

  config:
    auto.create.topics.enable: false
    offsets.topic.replication.factor: 1
    transaction.state.log.replication.factor: 1
    transaction.state.log.min.isr: 1
    default.replication.factor: 1
    min.insync.replicas: 1
    allow.everyone.if.no.acl.found: false

  clientsCa:
    generateCertificateAuthority: true
  clusterCa:
    generateCertificateAuthority: true

  entityOperator: {}

  cruiseControl:
    enabled: false
#    Convenience config to easily enable jmx Prometheus metrics including a default metrics configmap. This could also be
#    customized and configured through the spec.
    jmxPrometheusMetricsEnabled: true
#    The kafka.cruiseControl.spec is what will used 1-on-1 in the Kafka custom resource as `spec.cruiseControl`.
    spec: {}

  # This refers to the spec.kafka.template section in the Kafka resource
  templ: {}

  extendSpec: {}
#    replicas: 3
#    storage:
#      type: jbod
#      volumes:
#        - id: 0
#          type: persistent-claim
#          size: 1Gi
#          deleteClaim: false

podMonitor:
  kafka:
    enabled: false
    labels: {}
    scrapeTimeout: "20s"
    interval: "30s"
  entityOperator:
    enabled: false
    labels: {}
    scrapeTimeout: "20s"
    interval: "30s"

prometheusRule:
  enabled:
    kafka: false
  rules:
    kafka: []


clientsCa:
  create: true
  cert:
    generation: "0"
    caCrt: |
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    extraCerts: {}
  key:
    generation: "0"
    caKey: |
      -----BEGIN RSA PRIVATE KEY-----
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clusterCa:
  create: true
  cert:
    generation: "0"
    caCrt: |
      -----BEGIN CERTIFICATE-----
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      -----END CERTIFICATE-----
      -----BEGIN CERTIFICATE-----
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      -----END CERTIFICATE-----
  key:
    generation: "0"
    caKey: |
      -----BEGIN RSA PRIVATE KEY-----
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      0PfqEBe6v3OyZ/Hbv1pYF3F2QFZUGPSwiPit3lF8wD6ThZ3GICrTpNhkcdv8
      -----END RSA PRIVATE KEY-----
helm install axual-kafka oci://registry.axual.io/axual-charts/axual-kafka --version 0.2.0 -f ./axual-kafka.values.yaml -n kafka