Puppet Class: cassandra

Defined in:
puppet/modules/cassandra/manifests/init.pp

Overview

Class: cassandra

This Puppet class installs and configures Apache Cassandra, a distributed NoSQL storage solution.

Parameters:

logdir

the directory where logs should be stored

max_heap

the maximum heap size for Cassandra's JVM process

new_size

the amount of memory to allocate for the heap's young generation

Parameters:

  • logdir (Any)
  • max_heap (Any)
  • new_size (Any) 


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# File 'puppet/modules/cassandra/manifests/init.pp', line 14

class cassandra(
    $logdir,
    $max_heap,
    $new_size
) {
    require ::cassandra::datastax

    # copy over cassandra-env.sh with modified JVM memory settings
    file { '/etc/cassandra/cassandra-env.sh':
        content => template('cassandra/cassandra-env.sh.erb'),
        owner   => 'root',
        group   => 'root',
        require => Package['cassandra'],
        notify  => Service['cassandra'],
    }

    # copy over cassandra.yaml
    file { '/etc/cassandra/cassandra.yaml':
        source  => 'puppet:///modules/cassandra/cassandra.yaml',
        owner   => 'root',
        group   => 'root',
        require => Package['cassandra'],
        notify  => Service['cassandra'],
    }

    # copy over logback.xml with modified log dir
    file { '/etc/cassandra/logback.xml':
        content => template('cassandra/logback.xml.erb'),
        owner   => 'root',
        group   => 'root',
        require => Package['cassandra'],
        notify  => Service['cassandra'],
    }

    # make sure the log dir is there and with good chmod
    file { $logdir:
        ensure  => directory,
        mode    => '0777',
        require => Package['cassandra'],
    }

    # we use openjdk as the java distrib
    require_package('openjdk-8-jre-headless')

    package { 'cassandra':
        ensure  => latest,
    }

    # ensure the service is running
    # note: jobrunner must be started before cassandra, otherwise
    # it cannot allocate enough space for the translation cache
    service { 'cassandra':
        ensure  => running,
        enable  => true,
        require => [
            File[
                '/etc/cassandra/cassandra-env.sh',
                '/etc/cassandra/logback.xml',
                '/etc/cassandra/cassandra.yaml',
                $logdir
            ],
        ],
    }

}