terraform-aws-documentdb-cluster

Terraform module to provision an Amazon DocumentDB cluster.

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Security & Compliance

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

Usage

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.

For a complete example, see examples/complete.

For automated tests of the complete example using bats and Terratest (which tests and deploys the example on AWS), see test.

module "documentdb_cluster" {
  source = "cloudposse/documentdb-cluster/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version = "x.x.x"
  namespace               = "eg"
  stage                   = "testing"
  name                    = "docdb"
  cluster_size            = 3
  master_username         = "admin1"
  master_password         = "Test123456789"
  instance_class          = "db.r4.large"
  vpc_id                  = "vpc-xxxxxxxx"
  subnet_ids              = ["subnet-xxxxxxxx", "subnet-yyyyyyyy"]
  allowed_security_groups = ["sg-xxxxxxxx"]
  zone_id                 = "Zxxxxxxxx"
}

Makefile Targets

Available targets:

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

Requirements

Name	Version
terraform	>= 0.13.0
aws	>= 2.0
local	>= 1.3

Providers

Name	Version
aws	>= 2.0

Modules

Name	Source	Version
dns_master	cloudposse/route53-cluster-hostname/aws	0.12.2
dns_replicas	cloudposse/route53-cluster-hostname/aws	0.12.2
this	cloudposse/label/null	0.25.0

Resources

Name	Type
aws_docdb_cluster.default	resource
aws_docdb_cluster_instance.default	resource
aws_docdb_cluster_parameter_group.default	resource
aws_docdb_subnet_group.default	resource
aws_security_group.default	resource
aws_security_group_rule.egress	resource
aws_security_group_rule.ingress_cidr_blocks	resource
aws_security_group_rule.ingress_security_groups	resource

Inputs

Name	Description	Type	Default	Required
additional_tag_map	Additional key-value pairs to add to each map in `tags_as_list_of_maps`. Not added to `tags` or `id`. This is for some rare cases where resources want additional configuration of tags and therefore take a list of maps with tag key, value, and additional configuration.	`map(string)`	`{}`	no
allowed_cidr_blocks	List of CIDR blocks to be allowed to connect to the DocumentDB cluster	`list(string)`	`[]`	no
allowed_security_groups	List of existing Security Groups to be allowed to connect to the DocumentDB cluster	`list(string)`	`[]`	no
apply_immediately	Specifies whether any cluster modifications are applied immediately, or during the next maintenance window	`bool`	`true`	no
attributes	ID element. Additional attributes (e.g. `workers` or `cluster`) to add to `id`, in the order they appear in the list. New attributes are appended to the end of the list. The elements of the list are joined by the `delimiter` and treated as a single ID element.	`list(string)`	`[]`	no
auto_minor_version_upgrade	Specifies whether any minor engine upgrades will be applied automatically to the DB instance during the maintenance window or not	`bool`	`true`	no
cluster_dns_name	Name of the cluster CNAME record to create in the parent DNS zone specified by `zone_id`. If left empty, the name will be auto-asigned using the format `master.var.name`	`string`	`""`	no
cluster_family	The family of the DocumentDB cluster parameter group. For more details, see https://docs.aws.amazon.com/documentdb/latest/developerguide/db-cluster-parameter-group-create.html	`string`	`"docdb3.6"`	no
cluster_parameters	List of DB parameters to apply	list(object({ apply_method = string name = string value = string }))	`[]`	no
cluster_size	Number of DB instances to create in the cluster	`number`	`3`	no
context	Single object for setting entire context at once. See description of individual variables for details. Leave string and numeric variables as `null` to use default value. Individual variable settings (non-null) override settings in context object, except for attributes, tags, and additional_tag_map, which are merged.	`any`	{ "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 }	no
db_port	DocumentDB port	`number`	`27017`	no
deletion_protection	A value that indicates whether the DB cluster has deletion protection enabled	`bool`	`false`	no
delimiter	Delimiter to be used between ID elements. Defaults to `-` (hyphen). Set to `""` to use no delimiter at all.	`string`	`null`	no
descriptor_formats	Describe additional descriptors to be output in the `descriptors` output map. Map of maps. Keys are names of descriptors. Values are maps of the form `{<br> format = string<br> labels = list(string)<br>}` (Type is `any` so the map values can later be enhanced to provide additional options.) `format` is a Terraform format string to be passed to the `format()` function. `labels` is a list of labels, in order, to pass to `format()` function. Label values will be normalized before being passed to `format()` so they will be identical to how they appear in `id`. Default is `{}` (`descriptors` output will be empty).	`any`	`{}`	no
enabled	Set to false to prevent the module from creating any resources	`bool`	`null`	no
enabled_cloudwatch_logs_exports	List of log types to export to cloudwatch. The following log types are supported: `audit`, `error`, `general`, `slowquery`	`list(string)`	`[]`	no
engine	The name of the database engine to be used for this DB cluster. Defaults to `docdb`. Valid values: `docdb`	`string`	`"docdb"`	no
engine_version	The version number of the database engine to use	`string`	`"3.6.0"`	no
environment	ID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT'	`string`	`null`	no
id_length_limit	Limit `id` to this many characters (minimum 6). Set to `0` for unlimited length. Set to `null` for keep the existing setting, which defaults to `0`. Does not affect `id_full`.	`number`	`null`	no
instance_class	The instance class to use. For more details, see https://docs.aws.amazon.com/documentdb/latest/developerguide/db-instance-classes.html#db-instance-class-specs	`string`	`"db.r4.large"`	no
kms_key_id	The ARN for the KMS encryption key. When specifying `kms_key_id`, `storage_encrypted` needs to be set to `true`	`string`	`""`	no
label_key_case	Controls the letter case of the `tags` keys (label names) for tags generated by this module. Does not affect keys of tags passed in via the `tags` input. Possible values: `lower`, `title`, `upper`. Default value: `title`.	`string`	`null`	no
label_order	The order in which the labels (ID elements) appear in the `id`. Defaults to ["namespace", "environment", "stage", "name", "attributes"]. You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present.	`list(string)`	`null`	no
label_value_case	Controls the letter case of ID elements (labels) as included in `id`, set as tag values, and output by this module individually. Does not affect values of tags passed in via the `tags` input. Possible values: `lower`, `title`, `upper` and `none` (no transformation). Set this to `title` and set `delimiter` to `""` to yield Pascal Case IDs. Default value: `lower`.	`string`	`null`	no
labels_as_tags	Set of labels (ID elements) to include as tags in the `tags` output. Default is to include all labels. Tags with empty values will not be included in the `tags` output. Set to `[]` to suppress all generated tags. Notes: The value of the `name` tag, if included, will be the `id`, not the `name`. Unlike other `null-label` inputs, the initial setting of `labels_as_tags` cannot be changed in later chained modules. Attempts to change it will be silently ignored.	`set(string)`	[ "default" ]	no
master_password	(Required unless a snapshot_identifier is provided) Password for the master DB user. Note that this may show up in logs, and it will be stored in the state file. Please refer to the DocumentDB Naming Constraints	`string`	`""`	no
master_username	(Required unless a snapshot_identifier is provided) Username for the master DB user	`string`	`"admin1"`	no
name	ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'. This is the only ID element not also included as a `tag`. The "name" tag is set to the full `id` string. There is no tag with the value of the `name` input.	`string`	`null`	no
namespace	ID element. Usually an abbreviation of your organization name, e.g. 'eg' or 'cp', to help ensure generated IDs are globally unique	`string`	`null`	no
preferred_backup_window	Daily time range during which the backups happen	`string`	`"07:00-09:00"`	no
preferred_maintenance_window	The window to perform maintenance in. Syntax: `ddd:hh24:mi-ddd:hh24:mi`.	`string`	`"Mon:22:00-Mon:23:00"`	no
reader_dns_name	Name of the reader endpoint CNAME record to create in the parent DNS zone specified by `zone_id`. If left empty, the name will be auto-asigned using the format `replicas.var.name`	`string`	`""`	no
regex_replace_chars	Terraform regular expression (regex) string. Characters matching the regex will be removed from the ID elements. If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits.	`string`	`null`	no
retention_period	Number of days to retain backups for	`number`	`5`	no
skip_final_snapshot	Determines whether a final DB snapshot is created before the DB cluster is deleted	`bool`	`true`	no
snapshot_identifier	Specifies whether or not to create this cluster from a snapshot. You can use either the name or ARN when specifying a DB cluster snapshot, or the ARN when specifying a DB snapshot	`string`	`""`	no
stage	ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release'	`string`	`null`	no
storage_encrypted	Specifies whether the DB cluster is encrypted	`bool`	`true`	no
subnet_ids	List of VPC subnet IDs to place DocumentDB instances in	`list(string)`	n/a	yes
tags	Additional tags (e.g. `{'BusinessUnit': 'XYZ'}`). Neither the tag keys nor the tag values will be modified by this module.	`map(string)`	`{}`	no
tenant	ID element _(Rarely used, not included by default)_. A customer identifier, indicating who this instance of a resource is for	`string`	`null`	no
vpc_id	VPC ID to create the cluster in (e.g. `vpc-a22222ee`)	`string`	n/a	yes
zone_id	Route53 parent zone ID. If provided (not empty), the module will create sub-domain DNS records for the DocumentDB master and replicas	`string`	`""`	no

Outputs

Name	Description
arn	Amazon Resource Name (ARN) of the cluster
cluster_name	Cluster Identifier
endpoint	Endpoint of the DocumentDB cluster
master_host	DB master hostname
master_username	Username for the master DB user
reader_endpoint	A read-only endpoint of the DocumentDB cluster, automatically load-balanced across replicas
replicas_host	DB replicas hostname
security_group_arn	ARN of the DocumentDB cluster Security Group
security_group_id	ID of the DocumentDB cluster Security Group
security_group_name	Name of the DocumentDB cluster Security Group

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Related Projects

Check out these related projects.

terraform-aws-rds - Terraform module to provision AWS RDS instances for MySQL or Postgres
terraform-aws-rds-cluster - Terraform module to provision an RDS Aurora cluster for MySQL or Postgres
terraform-aws-rds-cloudwatch-sns-alarms - Terraform module that configures important RDS alerts using CloudWatch and sends them to an SNS topic

References

For additional context, refer to some of these links.

Creating an Amazon DocumentDB Cluster - official AWS documentation on how to create a DocumentDB cluster
Amazon DocumentDB Instance Class Specifications - provides details of the Amazon DocumentDB instance classes
Creating an Amazon DocumentDB Cluster Parameter Group - official AWS documentation on how to create an Amazon DocumentDB Cluster Parameter Group
Amazon DocumentDB Limits - describes the resource limits and naming constraints for Amazon DocumentDB
Understanding Amazon DocumentDB Amazon Resource Names (ARNs) - describes ARN formats for DocumentDB resources
Amazon DocumentDB Parameters - lists all the parameters that are specific to a DocumentDB cluster
Tagging Amazon DocumentDB Resources - describes how to use tags to add metadata to DocumentDB resources
Amazon DocumentDB FAQs - DocumentDB frequently asked questions
Troubleshooting Amazon DocumentDB - provides information about how to troubleshoot problems that you might encounter when using Amazon DocumentDB

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Copyright

License

See LICENSE for full details.

Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.  See the NOTICE file
distributed with this work for additional information
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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Contributors

Erik Osterman	Andriy Knysh	Igor Rodionov

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