#Elasticsearch Puppet module

####Table of Contents

1. Overview
2. Module description - What the module does and why it is useful
3. Setup - The basics of getting started with Elasticsearch

• The module manages the following
• Requirements

4. Usage - Configuration options and additional functionality
5. Advanced features - Extra information on advanced usage
6. Limitations - OS compatibility, etc.
7. Development - Guide for contributing to the module
8. Support - When you need help with this module

##Overview

This module manages Elasticsearch (http://www.elasticsearch.org/overview/elasticsearch/)

##Module description

The elasticsearch module sets up Elasticsearch instances and can manage plugins and templates.

This module has been tested against ES 1.0 and up.

##Setup

###The module manages the following

• Elasticsearch repository files.
• Elasticsearch package.
• Elasticsearch configuration file.
• Elasticsearch service.
• Elasticsearch plugins.
• Elasticsearch templates.

###Requirements

• The stdlib Puppet library.
• ceritsc/yum For yum version lock.
• richardc/datacat
• Augeas

Repository management

When using the repository management you will need the following dependency modules:

• Debian/Ubuntu: Puppetlabs/apt Version 1.8.x or lower.
• OpenSuSE: Darin/zypprepo

##Usage

###Main class

####Install a specific version

class { 'elasticsearch':
  version => '1.4.2'
}

Note: This will only work when using the repository.

####Automatic upgrade of the software ( default set to false )

class { 'elasticsearch':
  autoupgrade => true
}

####Removal/decommissioning

class { 'elasticsearch':
  ensure => 'absent'
}

####Install everything but disable service(s) afterwards

class { 'elasticsearch':
  status => 'disabled'
}

###Instances

This module works with the concept of instances. For service to start you need to specify at least one instance.

####Quick setup

elasticsearch::instance { 'es-01': }

This will set up its own data directory and set the node name to $hostname-$instance_name

####Advanced options

Instance specific options can be given:

elasticsearch::instance { 'es-01':
  config => { },        # Configuration hash
  init_defaults => { }, # Init defaults hash
  datadir => [ ],       # Data directory
}

See Advanced features for more information

###Plug-ins

Install a variety of plugins. Note that module_dir is where the plugin will install itself to and must match that published by the plugin author; it is not where you would like to install it yourself.

####From official repository

elasticsearch::plugin{'lmenezes/elasticsearch-kopf':
  instances  => 'instance_name'
}

####From custom url

elasticsearch::plugin{ 'jetty':
  url        => 'https://oss-es-plugins.s3.amazonaws.com/elasticsearch-jetty/elasticsearch-jetty-1.2.1.zip',
  instances  => 'instance_name'
}

####Using a proxy You can also use a proxy if required by setting the proxy_host and proxy_port options:

elasticsearch::plugin { 'lmenezes/elasticsearch-kopf',
  instances  => 'instance_name',
  proxy_host => 'proxy.host.com',
  proxy_port => 3128
}

#####Plugin name could be:

• elasticsearch/plugin/version for official elasticsearch plugins (download from download.elasticsearch.org)
• groupId/artifactId/version for community plugins (download from maven central or oss sonatype)
• username/repository for site plugins (download from github master)

####Upgrading plugins When you specify a certain plugin version, you can upgrade that plugin by specifying the new version.

elasticsearch::plugin { 'elasticsearch/elasticsearch-cloud-aws/2.1.1':
}

And to upgrade, you would simply change it to

elasticsearch::plugin { 'elasticsearch/elasticsearch-cloud-aws/2.4.1':
}

Please note that this does not work when you specify 'latest' as a version number.

###Scripts

Install scripts to be used by Elasticsearch. These scripts are shared across all defined instances on the same host.

elasticsearch::script { 'myscript':
  ensure => 'present',
  source => 'puppet:///path/to/my/script.groovy'
}

###Templates

Add a new template using a file

This will install and/or replace the template in Elasticsearch:

elasticsearch::template { 'templatename':
  file => 'puppet:///path/to/template.json'
}

Add a new template using content

This will install and/or replace the template in Elasticsearch:

elasticsearch::template { 'templatename':
  content => '{"template":"*","settings":{"number_of_replicas":0}}'
}

Delete a template

elasticsearch::template { 'templatename':
  ensure => 'absent'
}

Host

By default it uses localhost:9200 as host. you can change this with the host and port variables

elasticsearch::template { 'templatename':
  host => $::ipaddress,
  port => 9200
}

###Bindings / Clients

Install a variety of clients/bindings:

####Python

elasticsearch::python { 'rawes': }

####Ruby

elasticsearch::ruby { 'elasticsearch': }

###Connection Validator

This module offers a way to make sure an instance has been started and is up and running before doing a next action. This is done via the use of the es_instance_conn_validator resource.

es_instance_conn_validator { 'myinstance' :
  server => 'es.example.com',
  port   => '9200',
}

A common use would be for example :

class { 'kibana4' :
  require => Es_Instance_Conn_Validator['myinstance'],
}

###Package installation

There are 2 different ways of installing the software

####Repository

This option allows you to use an existing repository for package installation. The repo_version corresponds with the major version of Elasticsearch.

class { 'elasticsearch':
  manage_repo  => true,
  repo_version => '1.4',
}

####Remote package source

When a repository is not available or preferred you can install the packages from a remote source:

#####http/https/ftp

class { 'elasticsearch':
  package_url       => 'https://download.elasticsearch.org/elasticsearch/elasticsearch/elasticsearch-1.4.2.deb',
  proxy_url         => 'http://proxy.example.com:8080/',
}

Setting proxy_url to a location will enable download using the provided proxy server. This parameter is also used by elasticsearch::plugin. Setting the port in the proxy_url is mandatory. proxy_url defaults to undef (proxy disabled).

#####puppet://

class { 'elasticsearch':
  package_url => 'puppet:///path/to/elasticsearch-1.4.2.deb'
}

#####Local file

class { 'elasticsearch':
  package_url => 'file:/path/to/elasticsearch-1.4.2.deb'
}

###Java installation

Most sites will manage Java separately; however, this module can attempt to install Java as well. This is done by using the puppetlabs-java module.

class { 'elasticsearch':
  java_install => true
}

Specify a particular Java package/version to be installed:

class { 'elasticsearch':
  java_install => true,
  java_package => 'packagename'
}

###Service management

Currently only the basic SysV-style init and Systemd service providers are supported, but other systems could be implemented as necessary (pull requests welcome).

####Defaults File

The defaults file (/etc/defaults/elasticsearch or /etc/sysconfig/elasticsearch) for the Elasticsearch service can be populated as necessary. This can either be a static file resource or a simple key value-style hash object, the latter being particularly well-suited to pulling out of a data source such as Hiera.

#####file source

class { 'elasticsearch':
  init_defaults_file => 'puppet:///path/to/defaults'
}

#####hash representation

$config_hash = {
  'ES_USER' => 'elasticsearch',
  'ES_GROUP' => 'elasticsearch',
}

class { 'elasticsearch':
  init_defaults => $config_hash
}

Note: init_defaults hash can be passed to the main class and to the instance.

##Advanced features

###Package version pinning

The module supports pinning the package version to avoid accidental upgrades that are not done by Puppet. To enable this feature:

class { 'elasticsearch':
  package_pin => true,
  version     => '1.5.2',
}

In this example we pin the package version to 1.5.2.

###Data directories

There are 4 different ways of setting data directories for Elasticsearch. In every case the required configuration options are placed in the elasticsearch.yml file.

####Default By default we use:

/usr/share/elasticsearch/data/$instance_name

Which provides a data directory per instance.

####Single global data directory

class { 'elasticsearch':
  datadir => '/var/lib/elasticsearch-data'
}

Creates the following for each instance:

/var/lib/elasticsearch-data/$instance_name

####Multiple Global data directories

class { 'elasticsearch':
  datadir => [ '/var/lib/es-data1', '/var/lib/es-data2']
}

Creates the following for each instance: /var/lib/es-data1/$instance_name and /var/lib/es-data2/$instance_name

####Single instance data directory

class { 'elasticsearch': }

elasticsearch::instance { 'es-01':
  datadir => '/var/lib/es-data-es01'
}

Creates the following for this instance: /var/lib/es-data-es01

####Multiple instance data directories

class { 'elasticsearch': }

elasticsearch::instance { 'es-01':
  datadir => ['/var/lib/es-data1-es01', '/var/lib/es-data2-es01']
}

Creates the following for this instance: /var/lib/es-data1-es01 and /var/lib/es-data2-es01

###Main and instance configurations

The config option in both the main class and the instances can be configured to work together.

The options in the instance config hash will merged with the ones from the main class and override any duplicates.

Simple merging

class { 'elasticsearch':
  config => { 'cluster.name' => 'clustername' }
}

elasticsearch::instance { 'es-01':
  config => { 'node.name' => 'nodename' }
}
elasticsearch::instance { 'es-02':
  config => { 'node.name' => 'nodename2' }
}

This example merges the cluster.name together with the node.name option.

Overriding

When duplicate options are provided, the option in the instance config overrides the ones from the main class.

class { 'elasticsearch':
  config => { 'cluster.name' => 'clustername' }
}

elasticsearch::instance { 'es-01':
  config => { 'node.name' => 'nodename', 'cluster.name' => 'otherclustername' }
}

elasticsearch::instance { 'es-02':
  config => { 'node.name' => 'nodename2' }
}

This will set the cluster name to otherclustername for the instance es-01 but will keep it to clustername for instance es-02

####Configuration writeup

The config hash can be written in 2 different ways:

Full hash writeup

Instead of writing the full hash representation:

class { 'elasticsearch':
  config                 => {
   'cluster'             => {
     'name'              => 'ClusterName',
     'routing'           => {
        'allocation'     => {
          'awareness'    => {
            'attributes' => 'rack'
          }
        }
      }
    }
  }
}

Short hash writeup

class { 'elasticsearch':
  config => {
    'cluster' => {
      'name' => 'ClusterName',
      'routing.allocation.awareness.attributes' => 'rack'
    }
  }
}

##Limitations

This module has been built on and tested against Puppet 3.2 and higher.

The module has been tested on:

• Debian 6/7/8
• CentOS 6/7
• Ubuntu 12.04, 14.04
• OpenSuSE 13.x

Other distro's that have been reported to work:

• RHEL 6
• OracleLinux 6
• Scientific 6

Testing on other platforms has been light and cannot be guaranteed.

##Development

##Support

Need help? Join us in #elasticsearch on Freenode IRC or on the discussion forum.