AWS OpenSearch Terraform module

Terraform module which creates AWS OpenSearch resources.

Usage

See examples directory for working examples to reference:

module "opensearch" {
  source = "terraform-aws-modules/opensearch/aws"


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

  advanced_security_options = {
    enabled                        = false
    anonymous_auth_enabled         = true
    internal_user_database_enabled = true

    master_user_options = {
      master_user_name     = "example"
      master_user_password = "Barbarbarbar1!"
    }
  }

  auto_tune_options = {
    desired_state = "ENABLED"

    maintenance_schedule = [
      {
        start_at                       = "2028-05-13T07:44:12Z"
        cron_expression_for_recurrence = "cron(0 0 ? * 1 *)"
        duration = {
          value = "2"
          unit  = "HOURS"
        }
      }
    ]

    rollback_on_disable = "NO_ROLLBACK"
  }

  cluster_config = {
    instance_count           = 3
    dedicated_master_enabled = true
    dedicated_master_type    = "c6g.large.search"
    instance_type            = "r6g.large.search"

    zone_awareness_config = {
      availability_zone_count = 3
    }

    zone_awareness_enabled = true
  }

  domain_endpoint_options = {
    enforce_https       = true
    tls_security_policy = "Policy-Min-TLS-1-2-2019-07"
  }

  domain_name = local.name

  ebs_options = {
    ebs_enabled = true
    iops        = 3000
    throughput  = 125
    volume_type = "gp3"
    volume_size = 20
  }

  encrypt_at_rest = {
    enabled = true
  }

  engine_version = "OpenSearch_2.11"

  log_publishing_options = [
    { log_type = "INDEX_SLOW_LOGS" },
    { log_type = "SEARCH_SLOW_LOGS" },
  ]

  node_to_node_encryption = {
    enabled = true
  }

  software_update_options = {
    auto_software_update_enabled = true
  }

  vpc_options = {
    subnet_ids = ["subnet-abcde012", "subnet-bcde012a", "subnet-fghi345a"]
  }

  # VPC endpoint
  vpc_endpoints = {
    one = {
      subnet_ids = ["subnet-abcde012", "subnet-bcde012a", "subnet-fghi345a"]
    }
  }

  # Access policy
  access_policy_statements = [
    {
      effect = "Allow"

      principals = [{
        type        = "*"
        identifiers = ["*"]
      }]

      actions = ["es:*"]

      condition = [{
        test     = "IpAddress"
        variable = "aws:SourceIp"
        values   = ["127.0.0.1/32"]
      }]
    }
  ]

  tags = {
    Terraform   = "true"
    Environment = "dev"
  }
}

Examples

Examples codified under the examples are intended to give users references for how to use the module(s) as well as testing/validating changes to the source code of the module. If contributing to the project, please be sure to make any appropriate updates to the relevant examples to allow maintainers to test your changes and to keep the examples up to date for users. Thank you!

• Complete
• Serverless

Requirements

Name	Version
terraform	>= 1.0
aws	>= 5.40

Providers

Name	Version
aws	>= 5.40

Modules

No modules.

Resources

Name	Type
aws_cloudwatch_log_group.this	resource
aws_cloudwatch_log_resource_policy.this	resource
aws_opensearch_domain.this	resource
aws_opensearch_domain_policy.this	resource
aws_opensearch_domain_saml_options.this	resource
aws_opensearch_outbound_connection.this	resource
aws_opensearch_package_association.this	resource
aws_opensearch_vpc_endpoint.this	resource
aws_security_group.this	resource
aws_vpc_security_group_egress_rule.this	resource
aws_vpc_security_group_ingress_rule.this	resource
aws_caller_identity.current	data source
aws_iam_policy_document.cloudwatch	data source
aws_iam_policy_document.this	data source
aws_iam_session_context.current	data source
aws_partition.current	data source
aws_region.current	data source
aws_subnet.this	data source

Inputs

Name	Description	Type	Default	Required
access_policies	IAM policy document specifying the access policies for the domain. Required if create_access_policy is false	string	null	no
access_policy_override_policy_documents	List of IAM policy documents that are merged together into the exported document. In merging, statements with non-blank sids will override statements with the same sid	list(string)	[]	no
access_policy_source_policy_documents	List of IAM policy documents that are merged together into the exported document. Statements must have unique sids	list(string)	[]	no
access_policy_statements	A map of IAM policy statements for custom permission usage	any	{}	no
advanced_options	Key-value string pairs to specify advanced configuration options. Note that the values for these configuration options must be strings (wrapped in quotes) or they may be wrong and cause a perpetual diff, causing Terraform to want to recreate your Elasticsearch domain on every apply	map(string)	{}	no
advanced_security_options	Configuration block for fine-grained access control	any	{ "anonymous_auth_enabled": false, "enabled": true }	no
auto_tune_options	Configuration block for the Auto-Tune options of the domain	any	{ "desired_state": "ENABLED", "rollback_on_disable": "NO_ROLLBACK" }	no
cloudwatch_log_group_kms_key_id	If a KMS Key ARN is set, this key will be used to encrypt the corresponding log group. Please be sure that the KMS Key has an appropriate key policy (https://docs.aws.amazon.com/AmazonCloudWatch/latest/logs/encrypt-log-data-kms.html)	string	null	no
cloudwatch_log_group_retention_in_days	Number of days to retain log events	number	60	no
cloudwatch_log_resource_policy_name	Name of the resource policy for OpenSearch to log to CloudWatch	string	null	no
cluster_config	Configuration block for the cluster of the domain	any	{ "dedicated_master_enabled": true }	no
cognito_options	Configuration block for authenticating Kibana with Cognito	any	{}	no
create	Determines whether resources will be created (affects all resources)	bool	true	no
create_access_policy	Determines whether an access policy will be created	bool	true	no
create_cloudwatch_log_groups	Determines whether log groups are created	bool	true	no
create_cloudwatch_log_resource_policy	Determines whether a resource policy will be created for OpenSearch to log to CloudWatch	bool	true	no
create_saml_options	Determines whether SAML options will be created	bool	false	no
create_security_group	Determines if a security group is created	bool	true	no
domain_endpoint_options	Configuration block for domain endpoint HTTP(S) related options	any	{ "enforce_https": true, "tls_security_policy": "Policy-Min-TLS-1-2-2019-07" }	no
domain_name	Name of the domain	string	""	no
ebs_options	Configuration block for EBS related options, may be required based on chosen instance size	any	{ "ebs_enabled": true, "volume_size": 64, "volume_type": "gp3" }	no
enable_access_policy	Determines whether an access policy will be applied to the domain	bool	true	no
encrypt_at_rest	Configuration block for encrypting at rest	any	{ "enabled": true }	no
engine_version	Version of the OpenSearch engine to use	string	null	no
log_publishing_options	Configuration block for publishing slow and application logs to CloudWatch Logs. This block can be declared multiple times, for each log_type, within the same resource	any	[ { "log_type": "INDEX_SLOW_LOGS" }, { "log_type": "SEARCH_SLOW_LOGS" } ]	no
node_to_node_encryption	Configuration block for node-to-node encryption options	any	{ "enabled": true }	no
off_peak_window_options	Configuration to add Off Peak update options	any	{ "enabled": true, "off_peak_window": { "hours": 7 } }	no
outbound_connections	Map of AWS OpenSearch outbound connections to create	any	{}	no
package_associations	Map of package association IDs to associate with the domain	map(string)	{}	no
saml_options	SAML authentication options for an AWS OpenSearch Domain	any	{}	no
security_group_description	Description of the security group created	string	null	no
security_group_name	Name to use on security group created	string	null	no
security_group_rules	Security group ingress and egress rules to add to the security group created	any	{}	no
security_group_tags	A map of additional tags to add to the security group created	map(string)	{}	no
security_group_use_name_prefix	Determines whether the security group name (security_group_name) is used as a prefix	bool	true	no
software_update_options	Software update options for the domain	any	{ "auto_software_update_enabled": true }	no
tags	A map of tags to add to all resources	map(string)	{}	no
vpc_endpoints	Map of VPC endpoints to create for the domain	any	{}	no
vpc_options	Configuration block for VPC related options. Adding or removing this configuration forces a new resource (documentation)	any	{}	no

Outputs

Name	Description
cloudwatch_logs	Map of CloudWatch log groups created and their attributes
domain_arn	The Amazon Resource Name (ARN) of the domain
domain_dashboard_endpoint	Domain-specific endpoint for Dashboard without https scheme
domain_endpoint	Domain-specific endpoint used to submit index, search, and data upload requests
domain_id	The unique identifier for the domain
outbound_connections	Map of outbound connections created and their attributes
package_associations	Map of package associations created and their attributes
security_group_arn	Amazon Resource Name (ARN) of the security group
security_group_id	ID of the security group
vpc_endpoints	Map of VPC endpoints created and their attributes

License

Apache-2.0 Licensed. See LICENSE.