Puppet Class: confluent::kafka::broker

Inherits:
confluent::params
Defined in:
manifests/kafka/broker.pp

Overview

Class is used to install and configure an Apache Kafka Broker using the Confluent installation packages.

Examples:

Installation through class.

class{'confluent::kafka::broker':
  broker_id => '1',
  config => {
    'zookeeper.connect' => {
      'value' => 'zookeeper-01.custenborder.com:2181,zookeeper-02.custenborder.com:2181,zookeeper-03.custenborder.com:2181'
    },
  },
  environment_settings => {
    'KAFKA_HEAP_OPTS' => {
      'value' => '-Xmx4000M'
    }
  }
}

Hiera based installation

include ::confluent::kafka::broker

confluent::kafka::broker::broker_id: '1'
confluent::kafka::broker::config:
  zookeeper.connect:
    value: 'zookeeper-01.example.com:2181,zookeeper-02.example.com:2181,zookeeper-03.example.com:2181'
  log.dirs:
    value: /var/lib/kafka
  advertised.listeners:
    value: "PLAINTEXT://%{::fqdn}:9092"
  delete.topic.enable:
    value: true
  auto.create.topics.enable:
    value: false
confluent::kafka::broker::environment_settings:
  KAFKA_HEAP_OPTS:
    value: -Xmx1024M

Parameters:

  • broker_id (Any) —

    broker.id of the Kafka broker.

  • config (Any) (defaults to: { }) —

    Hash of configuration values.

  • environment_settings (Any) (defaults to: { }) —

    Hash of environment variables to set for the Kafka scripts.

  • config_path (Any) (defaults to: $::confluent::params::kafka_config_path) —

    Location of the server.properties file for the Kafka broker.

  • environment_file (Any) (defaults to: $::confluent::params::kafka_environment_path) —

    Location of the environment file used to pass environment variables to the Kafka broker.

  • data_path (Any) (defaults to: $::confluent::params::kafka_data_path) —

    Location to store the data on disk.

  • log_path (Any) (defaults to: $::confluent::params::kafka_log_path) —

    Location to write the log files to.

  • user (Any) (defaults to: $::confluent::params::kafka_user) —

    User to run the kafka service as.

  • service_name (Any) (defaults to: $::confluent::params::kafka_service) —

    Name of the kafka service.

  • manage_service (Any) (defaults to: $::confluent::params::kafka_manage_service) —

    Flag to determine if the service should be managed by puppet.

  • service_ensure (Any) (defaults to: $::confluent::params::kafka_service_ensure) —

    Ensure setting to pass to service resource.

  • service_enable (Any) (defaults to: $::confluent::params::kafka_service_enable) —

    Enable setting to pass to service resource.

  • file_limit (Any) (defaults to: $::confluent::params::kafka_file_limit) —

    File limit to set for the Kafka service (SystemD) only.

  • stop_timeout_secs (Any) (defaults to: $::confluent::params::kafka_stop_timeout_secs)
  • manage_repository (Any) (defaults to: $::confluent::params::manage_repository)
  • heap_size (Any) (defaults to: $::confluent::params::kafka_heap_size) 


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# File 'manifests/kafka/broker.pp', line 50

class confluent::kafka::broker (
  $broker_id,
  $config               = { },
  $environment_settings = { },
  $config_path          = $::confluent::params::kafka_config_path,
  $environment_file     = $::confluent::params::kafka_environment_path,
  $data_path            = $::confluent::params::kafka_data_path,
  $log_path             = $::confluent::params::kafka_log_path,
  $user                 = $::confluent::params::kafka_user,
  $service_name         = $::confluent::params::kafka_service,
  $manage_service       = $::confluent::params::kafka_manage_service,
  $service_ensure       = $::confluent::params::kafka_service_ensure,
  $service_enable       = $::confluent::params::kafka_service_enable,
  $file_limit           = $::confluent::params::kafka_file_limit,
  $stop_timeout_secs    = $::confluent::params::kafka_stop_timeout_secs,
  $manage_repository    = $::confluent::params::manage_repository,
  $heap_size            = $::confluent::params::kafka_heap_size,
) inherits confluent::params {
  include ::confluent
  include ::confluent::kafka

  if($manage_repository) {
    include ::confluent::repository
  }

  validate_hash($config)
  validate_hash($environment_settings)
  validate_integer($broker_id)
  validate_absolute_path($config_path)
  validate_absolute_path($environment_file)
  validate_absolute_path($log_path)
  validate_absolute_path($data_path)


  $kafka_default_settings = {
    'broker.id' => {
      'value' => $broker_id
    },
    'log.dirs' => {
      'value' => join(any2array($data_path), ',')
    }
  }

  $java_default_settings = {
    'KAFKA_HEAP_OPTS' => {
      'value' => "-Xmx${heap_size}"
    },
    'KAFKA_OPTS'      => {
      'value' => '-Djava.net.preferIPv4Stack=true'
    },
    'GC_LOG_ENABLED'  => {
      'value' => true
    },
    'LOG_DIR'         => {
      'value' => $log_path
    }
  }

  $actual_kafka_settings = merge($kafka_default_settings, $config)
  $actual_java_settings = merge($java_default_settings, $environment_settings)

  user { $user:
    ensure => present
  } ->
    file { [$log_path, $data_path]:
      ensure  => directory,
      owner   => $user,
      group   => $user,
      recurse => true
    }

  $ensure_kafka_settings_defaults = {
    'ensure'      => 'present',
    'path'        => $config_path,
    'application' => 'kafka'
  }

  ensure_resources('confluent::java_property', $actual_kafka_settings, $ensure_kafka_settings_defaults)

  $ensure_java_settings_defaults = {
    'path'        => $environment_file,
    'application' => 'kafka'
  }

  ensure_resources('confluent::kafka_environment_variable', $actual_java_settings, $ensure_java_settings_defaults)

  $unit_ini_setting_defaults = {
    'ensure' => 'present'
  }

  $unit_ini_settings = {
    "${service_name}/Unit/Description"        => { 'value' => 'Apache Kafka by Confluent', },
    "${service_name}/Unit/Wants"              => { 'value' => 'basic.target', },
    "${service_name}/Unit/After"              => { 'value' => 'basic.target network.target', },
    "${service_name}/Service/User"            => { 'value' => $user, },
    "${service_name}/Service/EnvironmentFile" => { 'value' => $environment_file, },
    "${service_name}/Service/ExecStart"       => { 'value' => "/usr/bin/kafka-server-start ${config_path}", },
    "${service_name}/Service/ExecStop"        => { 'value' => '/usr/bin/kafka-server-stop', },
    "${service_name}/Service/LimitNOFILE"     => { 'value' => $file_limit, },
    "${service_name}/Service/KillMode"        => { 'value' => 'process', },
    "${service_name}/Service/RestartSec"      => { 'value' => 5, },
    "${service_name}/Service/TimeoutStopSec"  => { 'value' => $stop_timeout_secs, },
    "${service_name}/Service/Type"            => { 'value' => 'simple', },
    "${service_name}/Install/WantedBy"        => { 'value' => 'multi-user.target', },
  }

  ensure_resources('confluent::systemd::unit_ini_setting', $unit_ini_settings, $unit_ini_setting_defaults)

  if($manage_service) {
    service { $service_name:
      ensure => $service_ensure,
      enable => $service_enable
    }
  }
}