Puppet Class: elasticsearch

Defined in:
modules/elasticsearch/manifests/init.pp

Overview

Class: elasticsearch

This class installs/configures/manages the elasticsearch service.

Parameters:

  • $default_instance_params: Parameter overrides for ::elasticsearch::instance

  • $version: Version of elasticsearch to configure. Either 5 or 6. Default: 5.

  • $logstash_host: Host to send logs to

  • $logstash_gelf_port: Tcp port on $logstash_host to send gelf formatted logs to.

  • $logstash_logback_port: Tcp port on localhost to send structured logs to.

  • $logstash_transport: Transport mechanism for logs.

Sample usage:

class { 'elasticsearch':
    default_instance_params => {
        cluster_name => 'labs-search',
    }
}

Parameters:

  • instances (Optional[Hash[String, Elasticsearch::InstanceParams]]) (defaults to: undef)
  • default_instance_params (Elasticsearch::InstanceParams) (defaults to: {})
  • version (Enum['5', '6', '7']) (defaults to: '5')
  • base_data_dir (Stdlib::Absolutepath) (defaults to: '/srv/elasticsearch')
  • logstash_host (Optional[String]) (defaults to: undef)
  • logstash_gelf_port (Optional[Stdlib::Port]) (defaults to: 12201)
  • logstash_logback_port (Optional[Stdlib::Port]) (defaults to: 11514)
  • logstash_transport (Enum['Gelf', 'syslog']) (defaults to: 'Gelf')
  • rack (Optional[String]) (defaults to: undef)
  • row (Optional[String]) (defaults to: undef)
  • java_home (Optional[String]) (defaults to: undef)


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# File 'modules/elasticsearch/manifests/init.pp', line 21

class elasticsearch (
    Optional[Hash[String, Elasticsearch::InstanceParams]] $instances = undef,
    Elasticsearch::InstanceParams $default_instance_params           = {},
    Enum['5', '6', '7'] $version                                     = '5',
    Stdlib::Absolutepath $base_data_dir                              = '/srv/elasticsearch',
    Optional[String] $logstash_host                                  = undef,
    Optional[Stdlib::Port] $logstash_gelf_port                       = 12201,
    Optional[Stdlib::Port] $logstash_logback_port                    = 11514,
    Enum['Gelf', 'syslog'] $logstash_transport                       = 'Gelf',
    Optional[String] $rack                                           = undef,
    Optional[String] $row                                            = undef,
    Optional[String] $java_home                                      = undef,
) {
    # Check arguments and set package
    case $version {
        '5': {
            $package_name = 'elasticsearch'
        }
        /[67]/: {
            $package_name = 'elasticsearch-oss'
        }
        default: { fail("Unsupported elasticsearch version: ${version}") }
    }

    if empty($instances) {
        $cluster_name = $default_instance_params['cluster_name']
        $defaults_for_single_instance = {
            http_port          => 9200,
            transport_tcp_port => 9300,
        }
        $configured_instances = {
            $cluster_name => merge(
                $defaults_for_single_instance,
                $default_instance_params
            )
        }
    } else {
        $configured_instances = $instances.reduce({}) |$agg, $kv_pair| {
            $instance_params = merge($default_instance_params, $kv_pair[1])
            $cluster_name = $instance_params['cluster_name']

            $agg + [$cluster_name, $instance_params]
        }
    }

    class { '::elasticsearch::packages':
        package_name          => $package_name,
        # Hack to be resolved in followup patch
        send_logs_to_logstash => $configured_instances.reduce(false) |Boolean $agg, $kv_pair| {
            $agg or pick_default($kv_pair[1]['send_logs_to_logstash'], true)
        }
    }

    class { '::elasticsearch::curator': }

    # Overwrite default env file provided by elastic
    # so that it does not conflict without our var set by systemd unit
    file { '/etc/default/elasticsearch':
        ensure  => file,
        owner   => 'root',
        group   => 'root',
        mode    => '0444',
        content => file('elasticsearch/elasticsearch.env'),
        require => Package['elasticsearch']
    }

    # main elasticsearch dir, purge it to ensure any undefined config file is removed
    file { '/etc/elasticsearch':
        ensure  => directory,
        owner   => 'root',
        group   => 'root',
        mode    => '0755',
        recurse => true,
        purge   => true,
        force   => true,
    }

    # These files are created when the server is using the default cluster_name
    # and are never written to when the server is using the correct cluster name
    # thus leaving old files with no useful information named in such a way that
    # someone might think they contain useful logs.
    file { '/var/log/elasticsearch/elasticsearch.log':
        ensure => absent,
    }
    file { '/var/log/elasticsearch/elasticsearch_index_indexing_slowlog.log':
        ensure => absent,
    }
    file { '/var/log/elasticsearch/elasticsearch_index_search_slowlog.log':
        ensure => absent,
    }

    file { [ $base_data_dir, '/var/log/elasticsearch' ]:
        ensure  => directory,
        owner   => 'elasticsearch',
        group   => 'elasticsearch',
        mode    => '0755',
        require => Package['elasticsearch'],
    }

    logrotate::rule { 'elasticsearch':
        ensure        => present,
        file_glob     => '/var/log/elasticsearch/*.log',
        frequency     => 'daily',
        copy_truncate => true,
        missing_ok    => true,
        not_if_empty  => true,
        rotate        => 7,
        compress      => true,
    }

    # since we are using our own systemd unit, ensure that the service
    # installed by the debian package is disabled
    service { 'elasticsearch':
        ensure  => stopped,
        enable  => false,
        require => Package['elasticsearch'],
    }

    systemd::unit { "elasticsearch_${version}@.service":
        ensure  => present,
        content => systemd_template("elasticsearch_${version}@"),
    }

    $configured_instances.each |$instance_title, $instance_params| {
        elasticsearch::instance { $instance_title:
            version               => $version,
            base_data_dir         => $base_data_dir,
            logstash_host         => $logstash_host,
            logstash_gelf_port    => $logstash_gelf_port,
            logstash_logback_port => $logstash_logback_port,
            logstash_transport    => $logstash_transport,
            rack                  => $rack,
            row                   => $row,
            *                     => $instance_params
        }
    }

    # Cluster management tool
    file { '/usr/local/bin/es-tool':
        ensure  => file,
        owner   => 'root',
        group   => 'root',
        mode    => '0755',
        source  => 'puppet:///modules/elasticsearch/es-tool.py',
        require => [Package['python-elasticsearch'], Package['python-ipaddr']],
    }

    $services_names = $configured_instances.map |$instance_title, $instance_params| {
        "elasticsearch_${version}@${instance_params['cluster_name']}"
    }

    file { '/etc/elasticsearch/instances':
        ensure  => file,
        owner   => 'root',
        group   => 'root',
        mode    => '0444',
        content => join($services_names, "\n"),
    }

}