Puppet Class: druid::middlemanager

Defined in:
modules/druid/manifests/middlemanager.pp

Overview

Class druid::middlemanager

Configures and runs a Druid MiddleManager. druid.io/docs/latest/design/indexing-service.html

Parameters

properties

Hash of runtime.properties See: Default $properties

env

Hash of shell environment variables. Default:

'JMX_PORT'             => 9664,
'DRUID_HEAP_OPTS'      => '-Xmx64m -Xms64m',

should_subscribe

True if the service should refresh if any of its config files change. Default: false

Default $properties

The properties listed here are only the defaults. For a full list of configuration properties, see druid.io/docs/latest/configuration/indexing-service.html

druid.port

Default: 8091

druid.worker.capacity

Maximum number of tasks the middle manager can accept. Default: 3

druid.indexer.runner.startPort

The port that peons begin running on. Default: 8200. Note that ferm rules will be set up to allow incoming access to this + 900 ports.

druid.indexer.runner.javaOpts

-X Java options to run the peon in its own JVM. Note that this default sets Dhadoop.mapreduce.job.user.classpath.first=true. This is a work around for a CDH vs Druid Jackson dependency issue. See: github.com/druid-io/druid/pull/2815 Default: '-server -Xmx128m -XX:+UseG1GC -XX:MaxGCPauseMillis=100 -Duser.timezone=UTC -Dfile.encoding=UTF-8 -Djava.util.logging.manager=org.apache.logging.log4j.jul.LogManager -Dhadoop.mapreduce.job.user.classpath.first=true'

druid.indexer.runner.javaCommand

Path to the Java executable that will be used to launch indexer Peon tasks. Default: $::druid::java_home/bin/java

druid.indexer.task.baseTaskDir

Base temporary working directory for tasks. Default: /srv/druid/task

druid.server.http.numThreads

Number of threads for HTTP requests. Default: 4,

druid.processing.buffer.sizeBytes

Default: 134217728

druid.processing.numThreads

Default: 1

Parameters:

  • properties (Any) (defaults to: {})
  • env (Any) (defaults to: {})
  • should_subscribe (Any) (defaults to: false)


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# File 'modules/druid/manifests/middlemanager.pp', line 64

class druid::middlemanager(
    $properties       = {},
    $env              = {},
    $should_subscribe = false,
)
{
    require ::druid

    $default_properties = {
        'druid.port'                        => 8091,
        'druid.worker.capacity'             => 3,

        'druid.indexer.runner.startPort'    => 8200,
        # Indexer tasks processes (peons) need to run
        # with the same java that druid should use.
        'druid.indexer.runner.javaCommand'  => "${::druid::java_home}/bin/java",
        'druid.indexer.runner.javaOpts'     => '-server -Xmx128m -XX:+UseG1GC -XX:MaxGCPauseMillis=100 -Duser.timezone=UTC -Dfile.encoding=UTF-8 -Djava.util.logging.manager=org.apache.logging.log4j.jul.LogManager -Dhadoop.mapreduce.job.user.classpath.first=true',

        'druid.indexer.task.baseTaskDir'    => '/srv/druid/task',

        'druid.server.http.numThreads'      => 4,

        'druid.processing.buffer.sizeBytes' => 64000000,

    }

    $default_env = {
        'JAVA_HOME'       => $::druid::java_home,
        'JMX_PORT'        => 9664,
        'DRUID_HEAP_OPTS' => '-Xmx64m -Xms64m',
    }

    # Save these in variables so the properties can be referenced
    # from outside of this class.
    $runtime_properties = merge($default_properties, $properties)
    $environment        = merge($default_env, $env)

    druid::service { 'middlemanager':
        runtime_properties => $runtime_properties,
        env                => $environment,
        should_subscribe   => $should_subscribe,
    }
}