Terraform module to provision an Elasticsearch cluster with built-in integrations with Kibana and Logstash.

This project is part of our comprehensive "SweetOps" approach towards DevOps.

It's 100% Open Source and licensed under the APACHE2.

We literally have hundreds of terraform modules that are Open Source and well-maintained. Check them out!

This module will create:

• Elasticsearch cluster with the specified node count in the provided subnets in a VPC
• Elasticsearch domain policy that accepts a list of IAM role ARNs from which to permit management traffic to the cluster
• Security Group to control access to the Elasticsearch domain (inputs to the Security Group are other Security Groups or CIDRs blocks to be allowed to connect to the cluster)
• DNS hostname record for Elasticsearch cluster (if DNS Zone ID is provided)
• DNS hostname record for Kibana (if DNS Zone ID is provided)

NOTE: To enable zone awareness to deploy Elasticsearch nodes into two different Availability Zones, you need to set zone_awareness_enabled to true and provide two different subnets in subnet_ids. If you enable zone awareness for your domain, Amazon ES places an endpoint into two subnets. The subnets must be in different Availability Zones in the same region. If you don't enable zone awareness, Amazon ES places an endpoint into only one subnet. You also need to set availability_zone_count to 1.

Security scanning is graciously provided by Bridgecrew. Bridgecrew is the leading fully hosted, cloud-native solution providing continuous Terraform security and compliance.

Benchmark	Description
	Infrastructure Security Compliance
	Center for Internet Security, KUBERNETES Compliance
	Center for Internet Security, AWS Compliance
	Center for Internet Security, AZURE Compliance
	Payment Card Industry Data Security Standards Compliance
	National Institute of Standards and Technology Compliance
	Information Security Management System, ISO/IEC 27001 Compliance
	Service Organization Control 2 Compliance
	Center for Internet Security, GCP Compliance
	Health Insurance Portability and Accountability Compliance

IMPORTANT: We do not pin modules to versions in our examples because of the difficulty of keeping the versions in the documentation in sync with the latest released versions. We highly recommend that in your code you pin the version to the exact version you are using so that your infrastructure remains stable, and update versions in a systematic way so that they do not catch you by surprise.

Also, because of a bug in the Terraform registry (hashicorp/terraform#21417), the registry shows many of our inputs as required when in fact they are optional. The table below correctly indicates which inputs are required.

module "elasticsearch" {
  source = "cloudposse/elasticsearch/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version     = "x.x.x"
  namespace               = "eg"
  stage                   = "dev"
  name                    = "es"
  dns_zone_id             = "Z14EN2YD427LRQ"
  security_groups         = ["sg-XXXXXXXXX", "sg-YYYYYYYY"]
  vpc_id                  = "vpc-XXXXXXXXX"
  subnet_ids              = ["subnet-XXXXXXXXX", "subnet-YYYYYYYY"]
  zone_awareness_enabled  = true
  elasticsearch_version   = "6.5"
  instance_type           = "t2.small.elasticsearch"
  instance_count          = 4
  ebs_volume_size         = 10
  iam_role_arns           = ["arn:aws:iam::XXXXXXXXX:role/ops", "arn:aws:iam::XXXXXXXXX:role/dev"]
  iam_actions             = ["es:ESHttpGet", "es:ESHttpPut", "es:ESHttpPost"]
  encrypt_at_rest_enabled = true
  kibana_subdomain_name   = "kibana-es"

  advanced_options = {
    "rest.action.multi.allow_explicit_index" = "true"
  }
}

Here is a working example of using this module:

• examples/complete

Here are automated tests for the complete example using bats and Terratest (which tests and deploys the example on AWS):

• test

Available targets:

  help                                Help screen
  help/all                            Display help for all targets
  help/short                          This help short screen
  lint                                Lint terraform code

object({
    enabled             = bool
    rollback_on_disable = string
    starting_time       = string
    cron_schedule       = string
    duration            = number
  })

{
  "cron_schedule": null,
  "duration": null,
  "enabled": false,
  "rollback_on_disable": "NO_ROLLBACK",
  "starting_time": null
}

[
  "ec2.amazonaws.com"
]

{
  "additional_tag_map": {},
  "attributes": [],
  "delimiter": null,
  "descriptor_formats": {},
  "enabled": true,
  "environment": null,
  "id_length_limit": null,
  "label_key_case": null,
  "label_order": [],
  "label_value_case": null,
  "labels_as_tags": [
    "unset"
  ],
  "name": null,
  "namespace": null,
  "regex_replace_chars": null,
  "stage": null,
  "tags": {},
  "tenant": null
}

[
  "default"
]

For additional context, refer to some of these links.

• What is Amazon Elasticsearch Service - Complete description of Amazon Elasticsearch Service
• Amazon Elasticsearch Service Access Control - Describes several ways of controlling access to Elasticsearch domains
• VPC Support for Amazon Elasticsearch Service Domains - Describes Elasticsearch Service VPC Support and VPC architectures with and without zone awareness
• Creating and Configuring Amazon Elasticsearch Service Domains - Provides a complete description on how to create and configure Amazon Elasticsearch Service (Amazon ES) domains
• Kibana and Logstash - Describes some considerations for using Kibana and Logstash with Amazon Elasticsearch Service
• Amazon Cognito Authentication for Kibana - Amazon Elasticsearch Service uses Amazon Cognito to offer user name and password protection for Kibana
• Control Access to Amazon Elasticsearch Service Domain - Describes how to Control Access to Amazon Elasticsearch Service Domain
• elasticsearch_domain - Terraform reference documentation for the elasticsearch_domain resource
• elasticsearch_domain_policy - Terraform reference documentation for the elasticsearch_domain_policy resource

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See LICENSE for full details.

Licensed to the Apache Software Foundation (ASF) under one
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regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
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  https://www.apache.org/licenses/LICENSE-2.0

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Erik Osterman	Andriy Knysh	Igor Rodionov	Sarkis Varozian	Marcin Brański