This is terraform-example-module project provides all the scaffolding for a typical well-built Cloud Posse module. It's a template repository you can use when creating new repositories.

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Usage

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 "vpc" {
  source = "cloudposse/vpc/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version = "x.x.x"

  ipv4_primary_cidr_block = "172.19.0.0/16"

  context = module.this.context
}

module "subnet" {
  source = "cloudposse/dynamic-subnets/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version = "x.x.x"

  availability_zones   = var.availability_zones
  vpc_id               = module.vpc.vpc_id
  igw_id               = [module.vpc.igw_id]
  ipv4_cidr_block      = module.vpc.vpc_cidr_block
  nat_gateway_enabled  = false
  nat_instance_enabled = false

  context = module.this.context
}

module "security_group" {
  source = "cloudposse/security-group/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version = "x.x.x"

  vpc_id = module.vpc.vpc_id

  rules = [
    {
      type        = "ingress"
      from_port   = var.port
      to_port     = var.port
      protocol    = "all"
      cidr_blocks = ["0.0.0.0/0"]
    },
    {
      type        = "egress"
      from_port   = 0
      to_port     = 0
      protocol    = "all"
      cidr_blocks = ["0.0.0.0/0"]
    }
  ]

  context = module.this.context
}

module "redshift_cluster" {
  source = "cloudposse/redshift-cluster/aws"
  # Cloud Posse recommends pinning every module to a specific version
  # version = "x.x.x"

  subnet_ids          = module.subnet.private_subnet_ids
  vpc_security_groups = [module.vpc.vpc_default_security_group_id, module.security_group.id]

  admin_user            = var.admin_user
  admin_password        = var.admin_password
  database_name         = var.database_name
  node_type             = var.node_type
  cluster_type          = var.cluster_type
  engine_version        = var.engine_version
  publicly_accessible   = var.publicly_accessible
  allow_version_upgrade = var.allow_version_upgrade

  context = module.this.context
}

Important

In Cloud Posse's examples, we avoid pinning modules to specific versions to prevent discrepancies between the documentation and the latest released versions. However, for your own projects, we strongly advise pinning each module to the exact version you're using. This practice ensures the stability of your infrastructure. Additionally, we recommend implementing a systematic approach for updating versions to avoid unexpected changes.

Examples

Here is an example of using this module:

• examples/complete - complete example of using this module

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	>= 0.14
aws	>= 5.0

Providers

Name	Version
aws	>= 5.0

Modules

Name	Source	Version
this	cloudposse/label/null	0.25.0

Resources

Name	Type
aws_redshift_cluster.default	resource
aws_redshift_parameter_group.default	resource
aws_redshift_subnet_group.default	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
admin_password	Password for the master DB user. Required unless a snapshot_identifier is provided	string	""	no
admin_user	Username for the master DB user. Required unless a snapshot_identifier is provided	string	"admin"	no
allow_version_upgrade	Whether or not to enable major version upgrades which are applied during the maintenance window to the Amazon Redshift engine that is running on the cluster	bool	false	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
automated_snapshot_retention_period	The number of days that automated snapshots are retained. If the value is 0, automated snapshots are disabled	number	1	no
availability_zone	Optional parameter to place Amazon Redshift cluster instances in a specific availability zone. If left empty, will place randomly	string	null	no
availability_zone_relocation_enabled	Whether or not the cluster can be relocated to another availability zone, either automatically by AWS or when requested. Available for use on clusters from the RA3 instance family	bool	false	no
cluster_identifier	The Redshift Cluster Identifier. Must be a lower case string. Will use generated label ID if not supplied	string	""	no
cluster_parameters	List of Redshift parameters to apply	list(object({ name = string value = string }))	[]	no
cluster_type	The cluster type to use. Either single-node or multi-node	string	"single-node"	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
database_name	The name of the first database to be created when the cluster is created	string	"dev"	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
elastic_ip	The Elastic IP (EIP) address for the cluster	string	null	no
enabled	Set to false to prevent the module from creating any resources	bool	null	no
encrypted	Specifies whether the cluster is encrypted at rest	bool	false	no
engine_version	The version of the Amazon Redshift engine to use. See https://docs.aws.amazon.com/redshift/latest/mgmt/cluster-versions.html	string	"1.0"	no
enhanced_vpc_routing	If true , enhanced VPC routing is enabled	bool	false	no
environment	ID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT'	string	null	no
final_snapshot_identifier	The identifier of the final snapshot that is to be created immediately before deleting the cluster. If this parameter is provided, skip_final_snapshot must be false	string	null	no
iam_roles	A list of IAM Role ARNs to associate with the cluster. A maximum of 10 can be associated to the cluster at any time	list(string)	[]	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
kms_key_arn	The ARN for the KMS encryption key. When specifying kms_key_arn, encrypted needs to be set to true	string	null	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
logging_bucket_name	The name of an existing S3 bucket where the log files are to be stored. Must be in the same region as the cluster and the cluster must have read bucket and put object permissions	string	null	no
logging_enabled	If true, enables logging information such as queries and connection attempts, for the specified Amazon Redshift cluster	bool	false	no
logging_s3_key_prefix	The prefix applied to the log file names	string	null	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
node_type	The node type to be provisioned for the cluster. See https://docs.aws.amazon.com/redshift/latest/mgmt/working-with-clusters.html#working-with-clusters-overview	string	"dc2.large"	no
number_of_nodes	The number of compute nodes in the cluster. This parameter is required when the ClusterType parameter is specified as multi-node	number	1	no
owner_account	The AWS customer account used to create or copy the snapshot. Required if you are restoring a snapshot you do not own, optional if you own the snapshot	string	null	no
port	The port number on which the cluster accepts incoming connections	number	5439	no
preferred_maintenance_window	Weekly time range during which system maintenance can occur, in UTC. Format: ddd:hh24:mi-ddd:hh24:mi	string	null	no
publicly_accessible	If true, the cluster can be accessed from a public network	bool	false	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
skip_final_snapshot	Determines whether a final snapshot of the cluster is created before Amazon Redshift deletes the cluster	bool	true	no
snapshot_cluster_identifier	The name of the cluster the source snapshot was created from	string	null	no
snapshot_identifier	The name of the snapshot from which to create the new cluster	string	null	no
stage	ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release'	string	null	no
subnet_ids	List of VPC subnet IDs	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_security_group_ids	A list of Virtual Private Cloud (VPC) security groups to be associated with the cluster. Used for EC2-VPC platform	list(string)	[]	no

Outputs

Name	Description
arn	Amazon Resource Name (ARN) of cluster
cluster_identifier	The Cluster Identifier
cluster_parameter_group_name	The name of the parameter group to be associated with this cluster
cluster_revision_number	The specific revision number of the database in the cluster
cluster_subnet_group_name	The name of a cluster subnet group to be associated with this cluster
cluster_type	The cluster type
database_name	The name of the default database in the Cluster
dns_name	The DNS name of the cluster
endpoint	The connection endpoint
id	The Redshift Cluster ID
node_type	The type of nodes in the cluster
port	The Port the cluster responds on
redshift_parameter_group_arn	Amazon Resource Name (ARN) of the Redshift parameter group
redshift_parameter_group_id	The Redshift parameter group ID
redshift_subnet_group_arn	Amazon Resource Name (ARN) of the Redshift Subnet group name
redshift_subnet_group_id	The Redshift Subnet group ID
vpc_security_group_ids	The VPC security group IDs associated with the cluster

Related Projects

Check out these related projects.

• terraform-null-label - Terraform module designed to generate consistent names and tags for resources. Use terraform-null-label to implement a strict naming convention.

References

For additional context, refer to some of these links.

• Terraform Standard Module Structure - HashiCorp's standard module structure is a file and directory layout we recommend for reusable modules distributed in separate repositories.
• Terraform Module Requirements - HashiCorp's guidance on all the requirements for publishing a module. Meeting the requirements for publishing a module is extremely easy.
• Terraform random_integer Resource - The resource random_integer generates random values from a given range, described by the min and max attributes of a given resource.
• Terraform Version Pinning - The required_version setting can be used to constrain which versions of the Terraform CLI can be used with your configuration

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License

Preamble to the Apache License, Version 2.0

Complete license is available in the LICENSE file.

Licensed to the Apache Software Foundation (ASF) under one
or more contributor license agreements.  See the NOTICE file
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regarding copyright ownership.  The ASF licenses this file
to you under the Apache License, Version 2.0 (the
"License"); you may not use this file except in compliance
with the License.  You may obtain a copy of the License at

  https://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing,
software distributed under the License is distributed on an
"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
KIND, either express or implied.  See the License for the
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