• Stars
    star
    516
  • Rank 82,422 (Top 2 %)
  • Language HCL
  • License
    Apache License 2.0
  • Created almost 7 years ago
  • Updated 11 months ago

Reviews

There are no reviews yet. Be the first to send feedback to the community and the maintainers!

Repository Details

Terraform Module to define a consistent naming convention by (namespace, stage, name, [attributes])

terraform-null-label Latest Release Slack Community

README Header

Cloud Posse

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

There are 6 inputs considered "labels" or "ID elements" (because the labels are used to construct the ID):

  1. namespace
  2. tenant
  3. environment
  4. stage
  5. name
  6. attributes

This module generates IDs using the following convention by default: {namespace}-{environment}-{stage}-{name}-{attributes}. However, it is highly configurable. The delimiter (e.g. -) is configurable. Each label item is optional (although you must provide at least one). So if you prefer the term stage to environment and do not need tenant, you can exclude them and the label id will look like {namespace}-{stage}-{name}-{attributes}.

  • The tenant label was introduced in v0.25.0. To preserve backward compatibility, it is not included by default.
  • The attributes input is actually a list of strings and {attributes} expands to the list elements joined by the delimiter.
  • If attributes is excluded but namespace, stage, and environment are included, id will look like {namespace}-{environment}-{stage}-{name}. Excluding attributes is discouraged, though, because attributes are the main way modules modify the ID to ensure uniqueness when provisioning the same resource types.
  • If you want the label items in a different order, you can specify that, too, with the label_order list.
  • You can set a maximum length for the id, and the module will create a (probably) unique name that fits within that length. (The module uses a portion of the MD5 hash of the full id to represent the missing part, so there remains a slight chance of name collision.)
  • You can control the letter case of the generated labels which make up the id using var.label_value_case.
  • By default, all of the non-empty labels are also exported as tags, whether they appear in the id or not. You can control which labels are exported as tags by setting labels_as_tags to the list of labels you want exported, or the empty list [] if you want no labels exported as tags at all. Tags passed in via the tags variable are always exported, and regardless of settings, empty labels are never exported as tags. You can control the case of the tag names (keys) for the labels using var.label_key_case. Unlike the tags generated from the label inputs, tags passed in via the tags input are not modified.

There is an unfortunate collision over the use of the key name. Cloud Posse uses name in this module to represent the component, such as eks or rds. AWS uses a tag with the key Name to store the full human-friendly identifier of the thing tagged, which this module outputs as id, not name. So when converting input labels to tags, the value of the Name key is set to the module id output, and there is no tag corresponding to the module name output. An empty name label will not prevent the Name tag from being exported.

It's recommended to use one terraform-null-label module for every unique resource of a given resource type. For example, if you have 10 instances, there should be 10 different labels. However, if you have multiple different kinds of resources (e.g. instances, security groups, file systems, and elastic ips), then they can all share the same label assuming they are logically related.

For most purposes, the id output is sufficient to create an ID or label for a resource, and if you want a different ID or a different format, you would instantiate another instance of null-label and configure it accordingly. However, to accomodate situations where you want all the same inputs to generate multiple descriptors, this module provides the descriptors output, which is a map of strings generated according to the format specified by the descriptor_formats input. This feature is intentionally simple and minimally configurable and will not be enhanced to add more features that are already in null-label. See examples/complete/descriptors.tf for examples.

All Cloud Posse Terraform modules use this module to ensure resources can be instantiated multiple times within an account and without conflict.

The Cloud Posse convention is to use labels as follows:

  • namespace: A short (3-4 letters) abbreviation of the company name, to ensure globally unique IDs for things like S3 buckets
  • tenant: (Rarely needed) When a company creates a dedicated resource per customer, tenant can be used to identify the customer the resource is dedicated to
  • environment: A short abbreviation for the AWS region hosting the resource, or gbl for resources like IAM roles that have no region
  • stage: The name or role of the account the resource is for, such as prod or dev
  • name: The name of the component that owns the resources, such as eks or rds

NOTE: The null originally referred to the primary Terraform provider used in this module. With Terraform 0.12, this module no longer needs any provider, but the name was kept for continuity.

  • Releases of this module from 0.23.0 onward only work with Terraform 0.13 or newer.
  • Releases of this module from 0.12.0 through 0.22.1 support HCL2 and are compatible with Terraform 0.12 or newer.
  • Releases of this module prior to 0.12.0 are compatible with earlier versions of terraform like Terraform 0.11.

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

Terraform Open Source Modules

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!

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 Infrastructure Security Compliance
CIS KUBERNETES Center for Internet Security, KUBERNETES Compliance
CIS AWS Center for Internet Security, AWS Compliance
CIS AZURE Center for Internet Security, AZURE Compliance
PCI-DSS Payment Card Industry Data Security Standards Compliance
NIST-800-53 National Institute of Standards and Technology Compliance
ISO27001 Information Security Management System, ISO/IEC 27001 Compliance
SOC2 Service Organization Control 2 Compliance
CIS GCP Center for Internet Security, GCP Compliance
HIPAA 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.

Defaults

Cloud Posse Terraform modules share a common context object that is meant to be passed from module to module. The context object is a single object that contains all the input values for terraform-null-label. However, each input value can also be specified individually by name as a standard Terraform variable, and the value of those variables, when set to something other than null, will override the value in the context object. In order to allow chaining of these objects, where the context object input to one module is transformed and passed on to the next module, all the variables default to null or empty collections. The actual default values used when nothing is explicitly set are described in the documentation below.

For example, the default value of delimiter is shown as null, but if you leave it set to null, terraform-null-label will actually use the default delimiter - (hyphen).

A non-obvious but intentional consequence of this design is that once a module sets a non-default value, future modules in the chain cannot reset the value back to the original default. Instead, the new setting becomes the new default for downstream modules. Also, collections are not overwritten, they are merged, so once a tag is added, it will remain in the tag set and cannot be removed, although its value can be overwritten.

Because the purpose of labels_as_tags is primarily to prevent tags from being generated that would conflict with the AWS provider's default_tags, it is an exception to the rule that variables override the setting in the context object. The value in the context object cannot be changed, so that later modules cannot re-enable a problematic tag.

Simple Example

module "eg_prod_bastion_label" {
  source   = "cloudposse/label/null"
  # Cloud Posse recommends pinning every module to a specific version
  # version = "x.x.x"

  namespace  = "eg"
  stage      = "prod"
  name       = "bastion"
  attributes = ["public"]
  delimiter  = "-"

  tags = {
    "BusinessUnit" = "XYZ",
    "Snapshot"     = "true"
  }
}

This will create an id with the value of eg-prod-bastion-public because when generating id, the default order is namespace, environment, stage, name, attributes (you can override it by using the label_order variable, see Advanced Example 3).

Now reference the label when creating an instance:

resource "aws_instance" "eg_prod_bastion_public" {
  instance_type = "t1.micro"
  tags          = module.eg_prod_bastion_label.tags
}

Or define a security group:

resource "aws_security_group" "eg_prod_bastion_public" {
  vpc_id = var.vpc_id
  name   = module.eg_prod_bastion_label.id
  tags   = module.eg_prod_bastion_label.tags
  egress {
    from_port   = 0
    to_port     = 0
    protocol    = "-1"
    cidr_blocks = ["0.0.0.0/0"]
  }
}

Advanced Example

Here is a more complex example with two instances using two different labels. Note how efficiently the tags are defined for both the instance and the security group.

Click to show
module "eg_prod_bastion_label" {
  source   = "cloudposse/label/null"
  # Cloud Posse recommends pinning every module to a specific version
  # version = "x.x.x"

  namespace  = "eg"
  stage      = "prod"
  name       = "bastion"
  delimiter  = "-"

  tags = {
    "BusinessUnit" = "XYZ",
    "Snapshot"     = "true"
  }
}

module "eg_prod_bastion_abc_label" {
  source   = "cloudposse/label/null"
  # Cloud Posse recommends pinning every module to a specific version
  # version = "x.x.x"

  attributes = ["abc"]

  tags = {
    "BusinessUnit" = "ABC" # Override the Business Unit tag set in the base label
  }

  # Copy all other fields from the base label
  context = module.eg_prod_bastion_label.context
}

resource "aws_security_group" "eg_prod_bastion_abc" {
  name = module.eg_prod_bastion_abc_label.id
  tags = module.eg_prod_bastion_abc_label.tags
  ingress {
    from_port   = 22
    to_port     = 22
    protocol    = "tcp"
    cidr_blocks = ["0.0.0.0/0"]
  }
}

resource "aws_instance" "eg_prod_bastion_abc" {
   instance_type          = "t1.micro"
   tags                   = module.eg_prod_bastion_abc_label.tags
   vpc_security_group_ids = [aws_security_group.eg_prod_bastion_abc.id]
}

module "eg_prod_bastion_xyz_label" {
  source   = "cloudposse/label/null"
  # Cloud Posse recommends pinning every module to a specific version
  # version = "x.x.x"

  attributes = ["xyz"]

  context = module.eg_prod_bastion_label.context
}

resource "aws_security_group" "eg_prod_bastion_xyz" {
  name = module.eg_prod_bastion_xyz_label.id
  tags = module.eg_prod_bastion_xyz_label.tags
  ingress {
    from_port   = 22
    to_port     = 22
    protocol    = "tcp"
    cidr_blocks = ["0.0.0.0/0"]
  }
}

resource "aws_instance" "eg_prod_bastion_xyz" {
   instance_type          = "t1.micro"
   tags                   = module.eg_prod_bastion_xyz_label.tags
   vpc_security_group_ids = [aws_security_group.eg_prod_bastion_xyz.id]
}

Advanced Example 2

Here is a more complex example with an autoscaling group that has a different tagging schema than other resources and requires its tags to be in this format, which this module can generate via additional_tag_map and tags_as_list_of_maps:

Click to show
tags = [
    {
        key = "Name",
        propagate_at_launch = true,
        value = "namespace-stage-name"
    },
    {
        key = "Namespace",
        propagate_at_launch = true,
        value = "namespace"
    },
    {
        key = "Stage",
        propagate_at_launch = true,
        value = "stage"
    }
]

Autoscaling group using propagating tagging below (full example: autoscalinggroup)

################################
# terraform-null-label example #
################################
module "label" {
  source    = "../../"
  namespace = "cp"
  stage     = "prod"
  name      = "app"

  tags = {
    BusinessUnit = "Finance"
    ManagedBy    = "Terraform"
  }

  additional_tag_map = {
    propagate_at_launch = true
  }
}

#######################
# Launch template     #
#######################
resource "aws_launch_template" "default" {
  # terraform-null-label example used here: Set template name prefix
  name_prefix                           = "${module.label.id}-"
  image_id                              = data.aws_ami.amazon_linux.id
  instance_type                         = "t2.micro"
  instance_initiated_shutdown_behavior  = "terminate"

  vpc_security_group_ids                = [data.aws_security_group.default.id]

  monitoring {
    enabled                             = false
  }
  # terraform-null-label example used here: Set tags on volumes
  tag_specifications {
    resource_type                       = "volume"
    tags                                = module.label.tags
  }
}

######################
# Autoscaling group  #
######################
resource "aws_autoscaling_group" "default" {
  # terraform-null-label example used here: Set ASG name prefix
  name_prefix                           = "${module.label.id}-"
  vpc_zone_identifier                   = data.aws_subnet_ids.all.ids
  max_size                              = 1
  min_size                              = 1
  desired_capacity                      = 1

  launch_template = {
    id                                  = aws_launch_template.default.id
    version                             = "$$Latest"
  }

  # terraform-null-label example used here: Set tags on ASG and EC2 Servers
  tags                                  = module.label.tags_as_list_of_maps
}

Advanced Example 3

See complete example for even more examples.

This example shows how you can pass the context output of one label module to the next label_module, allowing you to create one label that has the base set of values, and then creating every extra label as a derivative of that.

Click to show
module "label1" {
  source   = "cloudposse/label/null"
  # Cloud Posse recommends pinning every module to a specific version
  # version     = "x.x.x"

  namespace   = "CloudPosse"
  tenant      = "H.R.H"
  environment = "UAT"
  stage       = "build"
  name        = "Winston Churchroom"
  attributes  = ["fire", "water", "earth", "air"]

  label_order = ["name", "tenant", "environment", "stage", "attributes"]

  tags = {
    "City"        = "Dublin"
    "Environment" = "Private"
  }
}

module "label2" {
  source   = "cloudposse/label/null"
  # Cloud Posse recommends pinning every module to a specific version
  # version     = "x.x.x"

  name      = "Charlie"
  tenant    = "" # setting to `null` would have no effect
  stage     = "test"
  delimiter = "+"
  regex_replace_chars = "/[^a-zA-Z0-9-+]/"

  additional_tag_map = {
    propagate_at_launch = true
    additional_tag      = "yes"
  }

  tags = {
    "City"        = "London"
    "Environment" = "Public"
  }

  context   = module.label1.context
}

module "label3" {
  source   = "cloudposse/label/null"
  # Cloud Posse recommends pinning every module to a specific version
  # version     = "x.x.x"

  name      = "Starfish"
  stage     = "release"
  delimiter = "."
  regex_replace_chars = "/[^-a-zA-Z0-9.]/"

  tags = {
    "Eat"    = "Carrot"
    "Animal" = "Rabbit"
  }

  context   = module.label1.context
}

This creates label outputs like this:

label1 = {
  "attributes" = tolist([
    "fire",
    "water",
    "earth",
    "air",
  ])
  "delimiter" = "-"
  "id" = "winstonchurchroom-hrh-uat-build-fire-water-earth-air"
  "name" = "winstonchurchroom"
  "namespace" = "cloudposse"
  "stage" = "build"
  "tenant" = "hrh"
}
label1_context = {
  "additional_tag_map" = {}
  "attributes" = tolist([
    "fire",
    "water",
    "earth",
    "air",
  ])
  "delimiter" = tostring(null)
  "enabled" = true
  "environment" = "UAT"
  "id_length_limit" = tonumber(null)
  "label_key_case" = tostring(null)
  "label_order" = tolist([
    "name",
    "tenant",
    "environment",
    "stage",
    "attributes",
  ])
  "label_value_case" = tostring(null)
  "name" = "Winston Churchroom"
  "namespace" = "CloudPosse"
  "regex_replace_chars" = tostring(null)
  "stage" = "build"
  "tags" = {
    "City" = "Dublin"
    "Environment" = "Private"
  }
  "tenant" = "H.R.H"
}
label1_normalized_context = {
  "additional_tag_map" = {}
  "attributes" = tolist([
    "fire",
    "water",
    "earth",
    "air",
  ])
  "delimiter" = "-"
  "enabled" = true
  "environment" = "uat"
  "id_length_limit" = 0
  "label_key_case" = "title"
  "label_order" = tolist([
    "name",
    "tenant",
    "environment",
    "stage",
    "attributes",
  ])
  "label_value_case" = "lower"
  "name" = "winstonchurchroom"
  "namespace" = "cloudposse"
  "regex_replace_chars" = "/[^-a-zA-Z0-9]/"
  "stage" = "build"
  "tags" = {
    "Attributes" = "fire-water-earth-air"
    "City" = "Dublin"
    "Environment" = "Private"
    "Name" = "winstonchurchroom-hrh-uat-build-fire-water-earth-air"
    "Namespace" = "cloudposse"
    "Stage" = "build"
    "Tenant" = "hrh"
  }
  "tenant" = "hrh"
}
label1_tags = tomap({
  "Attributes" = "fire-water-earth-air"
  "City" = "Dublin"
  "Environment" = "Private"
  "Name" = "winstonchurchroom-hrh-uat-build-fire-water-earth-air"
  "Namespace" = "cloudposse"
  "Stage" = "build"
  "Tenant" = "hrh"
})
label2 = {
  "attributes" = tolist([
    "fire",
    "water",
    "earth",
    "air",
  ])
  "delimiter" = "+"
  "id" = "charlie+uat+test+fire+water+earth+air"
  "name" = "charlie"
  "namespace" = "cloudposse"
  "stage" = "test"
  "tenant" = ""
}
label2_context = {
  "additional_tag_map" = {
    "additional_tag" = "yes"
    "propagate_at_launch" = "true"
  }
  "attributes" = tolist([
    "fire",
    "water",
    "earth",
    "air",
  ])
  "delimiter" = "+"
  "enabled" = true
  "environment" = "UAT"
  "id_length_limit" = tonumber(null)
  "label_key_case" = tostring(null)
  "label_order" = tolist([
    "name",
    "tenant",
    "environment",
    "stage",
    "attributes",
  ])
  "label_value_case" = tostring(null)
  "name" = "Charlie"
  "namespace" = "CloudPosse"
  "regex_replace_chars" = "/[^a-zA-Z0-9-+]/"
  "stage" = "test"
  "tags" = {
    "City" = "London"
    "Environment" = "Public"
  }
  "tenant" = ""
}
label2_tags = tomap({
  "Attributes" = "fire+water+earth+air"
  "City" = "London"
  "Environment" = "Public"
  "Name" = "charlie+uat+test+fire+water+earth+air"
  "Namespace" = "cloudposse"
  "Stage" = "test"
})
label2_tags_as_list_of_maps = [
  {
    "additional_tag" = "yes"
    "key" = "Attributes"
    "propagate_at_launch" = "true"
    "value" = "fire+water+earth+air"
  },
  {
    "additional_tag" = "yes"
    "key" = "City"
    "propagate_at_launch" = "true"
    "value" = "London"
  },
  {
    "additional_tag" = "yes"
    "key" = "Environment"
    "propagate_at_launch" = "true"
    "value" = "Public"
  },
  {
    "additional_tag" = "yes"
    "key" = "Name"
    "propagate_at_launch" = "true"
    "value" = "charlie+uat+test+fire+water+earth+air"
  },
  {
    "additional_tag" = "yes"
    "key" = "Namespace"
    "propagate_at_launch" = "true"
    "value" = "cloudposse"
  },
  {
    "additional_tag" = "yes"
    "key" = "Stage"
    "propagate_at_launch" = "true"
    "value" = "test"
  },
]
label3 = {
  "attributes" = tolist([
    "fire",
    "water",
    "earth",
    "air",
  ])
  "delimiter" = "."
  "id" = "starfish.h.r.h.uat.release.fire.water.earth.air"
  "name" = "starfish"
  "namespace" = "cloudposse"
  "stage" = "release"
  "tenant" = "h.r.h"
}
label3_context = {
  "additional_tag_map" = {}
  "attributes" = tolist([
    "fire",
    "water",
    "earth",
    "air",
  ])
  "delimiter" = "."
  "enabled" = true
  "environment" = "UAT"
  "id_length_limit" = tonumber(null)
  "label_key_case" = tostring(null)
  "label_order" = tolist([
    "name",
    "tenant",
    "environment",
    "stage",
    "attributes",
  ])
  "label_value_case" = tostring(null)
  "name" = "Starfish"
  "namespace" = "CloudPosse"
  "regex_replace_chars" = "/[^-a-zA-Z0-9.]/"
  "stage" = "release"
  "tags" = {
    "Animal" = "Rabbit"
    "City" = "Dublin"
    "Eat" = "Carrot"
    "Environment" = "Private"
  }
  "tenant" = "H.R.H"
}
label3_normalized_context = {
  "additional_tag_map" = {}
  "attributes" = tolist([
    "fire",
    "water",
    "earth",
    "air",
  ])
  "delimiter" = "."
  "enabled" = true
  "environment" = "uat"
  "id_length_limit" = 0
  "label_key_case" = "title"
  "label_order" = tolist([
    "name",
    "tenant",
    "environment",
    "stage",
    "attributes",
  ])
  "label_value_case" = "lower"
  "name" = "starfish"
  "namespace" = "cloudposse"
  "regex_replace_chars" = "/[^-a-zA-Z0-9.]/"
  "stage" = "release"
  "tags" = {
    "Animal" = "Rabbit"
    "Attributes" = "fire.water.earth.air"
    "City" = "Dublin"
    "Eat" = "Carrot"
    "Environment" = "Private"
    "Name" = "starfish.h.r.h.uat.release.fire.water.earth.air"
    "Namespace" = "cloudposse"
    "Stage" = "release"
    "Tenant" = "h.r.h"
  }
  "tenant" = "h.r.h"
}
label3_tags = tomap({
  "Animal" = "Rabbit"
  "Attributes" = "fire.water.earth.air"
  "City" = "Dublin"
  "Eat" = "Carrot"
  "Environment" = "Private"
  "Name" = "starfish.h.r.h.uat.release.fire.water.earth.air"
  "Namespace" = "cloudposse"
  "Stage" = "release"
  "Tenant" = "h.r.h"
})

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

Providers

No providers.

Modules

No modules.

Resources

No resources.

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
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
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
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
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
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
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
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
stage ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release' string null no
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

Outputs

Name Description
additional_tag_map The merged additional_tag_map
attributes List of attributes
context Merged but otherwise unmodified input to this module, to be used as context input to other modules.
Note: this version will have null values as defaults, not the values actually used as defaults.
delimiter Delimiter between namespace, tenant, environment, stage, name and attributes
descriptors Map of descriptors as configured by descriptor_formats
enabled True if module is enabled, false otherwise
environment Normalized environment
id Disambiguated ID string restricted to id_length_limit characters in total
id_full ID string not restricted in length
id_length_limit The id_length_limit actually used to create the ID, with 0 meaning unlimited
label_order The naming order actually used to create the ID
name Normalized name
namespace Normalized namespace
normalized_context Normalized context of this module
regex_replace_chars The regex_replace_chars actually used to create the ID
stage Normalized stage
tags Normalized Tag map
tags_as_list_of_maps This is a list with one map for each tag. Each map contains the tag key,
value, and contents of var.additional_tag_map. Used in the rare cases
where resources need additional configuration information for each tag.
tenant Normalized tenant

Help

Got a question? We got answers.

File a GitHub issue, send us an email or join our Slack Community.

README Commercial Support

DevOps Accelerator for Startups

We are a DevOps Accelerator. We'll help you build your cloud infrastructure from the ground up so you can own it. Then we'll show you how to operate it and stick around for as long as you need us.

Learn More

Work directly with our team of DevOps experts via email, slack, and video conferencing.

We deliver 10x the value for a fraction of the cost of a full-time engineer. Our track record is not even funny. If you want things done right and you need it done FAST, then we're your best bet.

  • Reference Architecture. You'll get everything you need from the ground up built using 100% infrastructure as code.
  • Release Engineering. You'll have end-to-end CI/CD with unlimited staging environments.
  • Site Reliability Engineering. You'll have total visibility into your apps and microservices.
  • Security Baseline. You'll have built-in governance with accountability and audit logs for all changes.
  • GitOps. You'll be able to operate your infrastructure via Pull Requests.
  • Training. You'll receive hands-on training so your team can operate what we build.
  • Questions. You'll have a direct line of communication between our teams via a Shared Slack channel.
  • Troubleshooting. You'll get help to triage when things aren't working.
  • Code Reviews. You'll receive constructive feedback on Pull Requests.
  • Bug Fixes. We'll rapidly work with you to fix any bugs in our projects.

Slack Community

Join our Open Source Community on Slack. It's FREE for everyone! Our "SweetOps" community is where you get to talk with others who share a similar vision for how to rollout and manage infrastructure. This is the best place to talk shop, ask questions, solicit feedback, and work together as a community to build totally sweet infrastructure.

Discourse Forums

Participate in our Discourse Forums. Here you'll find answers to commonly asked questions. Most questions will be related to the enormous number of projects we support on our GitHub. Come here to collaborate on answers, find solutions, and get ideas about the products and services we value. It only takes a minute to get started! Just sign in with SSO using your GitHub account.

Newsletter

Sign up for our newsletter that covers everything on our technology radar. Receive updates on what we're up to on GitHub as well as awesome new projects we discover.

Office Hours

Join us every Wednesday via Zoom for our weekly "Lunch & Learn" sessions. It's FREE for everyone!

zoom

Contributing

Bug Reports & Feature Requests

Please use the issue tracker to report any bugs or file feature requests.

Developing

If you are interested in being a contributor and want to get involved in developing this project or help out with our other projects, we would love to hear from you! Shoot us an email.

In general, PRs are welcome. We follow the typical "fork-and-pull" Git workflow.

  1. Fork the repo on GitHub
  2. Clone the project to your own machine
  3. Commit changes to your own branch
  4. Push your work back up to your fork
  5. Submit a Pull Request so that we can review your changes

NOTE: Be sure to merge the latest changes from "upstream" before making a pull request!

Copyright

Copyright Β© 2017-2023 Cloud Posse, LLC

License

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
"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
specific language governing permissions and limitations
under the License.

Trademarks

All other trademarks referenced herein are the property of their respective owners.

About

This project is maintained and funded by Cloud Posse, LLC. Like it? Please let us know by leaving a testimonial!

Cloud Posse

We're a DevOps Professional Services company based in Los Angeles, CA. We ❀️ Open Source Software.

We offer paid support on all of our projects.

Check out our other projects, follow us on twitter, apply for a job, or hire us to help with your cloud strategy and implementation.

Contributors

Erik Osterman
Erik Osterman
Andriy Knysh
Andriy Knysh
Igor Rodionov
Igor Rodionov
Sergey Vasilyev
Sergey Vasilyev
Michael Pereira
Michael Pereira
Jamie Nelson
Jamie Nelson
Vladimir
Vladimir
Daren Desjardins
Daren Desjardins
Maarten van der Hoef
Maarten van der Hoef
Adam Tibbing
Adam Tibbing
Yonatan Koren
Yonatan Koren

README Footer Beacon

More Repositories

1

geodesic

πŸš€ Geodesic is a DevOps Linux Toolbox in Docker
Shell
915
star
2

bastion

πŸ”’Secure Bastion implemented as Docker Container running Alpine Linux with Google Authenticator & DUO MFA support
Shell
623
star
3

atmos

πŸ‘½ Workflow automation tool for DevOps. Keep configuration DRY with hierarchical imports of configurations, inheritance, and WAY more. Native support for Terraform and Helmfile.
Go
490
star
4

terraform-aws-eks-cluster

Terraform module for provisioning an EKS cluster
HCL
453
star
5

terraform-aws-components

Opinionated, self-contained Terraform root modules that each solve one, specific problem
HCL
403
star
6

build-harness

Collection of Makefiles to facilitate building Golang projects, Dockerfiles, Helm charts, and more
Makefile
348
star
7

terraform-aws-tfstate-backend

Terraform module that provision an S3 bucket to store the `terraform.tfstate` file and a DynamoDB table to lock the state file to prevent concurrent modifications and state corruption.
HCL
344
star
8

terraform-aws-ecs-container-definition

Terraform module to generate well-formed JSON documents (container definitions) that are passed to the aws_ecs_task_definition Terraform resource
HCL
316
star
9

terraform-aws-elastic-beanstalk-environment

Terraform module to provision an AWS Elastic Beanstalk Environment
HCL
292
star
10

terraform-aws-cloudfront-s3-cdn

Terraform module to easily provision CloudFront CDN backed by an S3 origin
HCL
255
star
11

helmfiles

Comprehensive Distribution of Helmfiles for Kubernetes
Makefile
250
star
12

terraform-aws-jenkins

Terraform module to build Docker image with Jenkins, save it to an ECR repo, and deploy to Elastic Beanstalk running Docker stack
HCL
250
star
13

terraform-aws-vpc

Terraform Module that defines a VPC with public/private subnets across multiple AZs with Internet Gateways
HCL
212
star
14

terraform-aws-elasticsearch

Terraform module to provision an Elasticsearch cluster with built-in integrations with Kibana and Logstash.
HCL
211
star
15

terraform-aws-ecs-web-app

Terraform module that implements a web app on ECS and supports autoscaling, CI/CD, monitoring, ALB integration, and much more.
HCL
206
star
16

terraform-aws-cloudtrail-cloudwatch-alarms

Terraform module for creating alarms for tracking important changes and occurrences from cloudtrail.
HCL
193
star
17

tfmask

Terraform utility to mask select output from `terraform plan` and `terraform apply`
Go
191
star
18

terraform-aws-cicd

Terraform Module for CI/CD with AWS Code Pipeline and Code Build
HCL
185
star
19

copyright-header

Β© Copyright Header is a utility to manipulate software licenses on source code.
Ruby
177
star
20

terraform-aws-ecr

Terraform Module to manage Docker Container Registries on AWS ECR
HCL
170
star
21

terraform-aws-dynamic-subnets

Terraform module for public and private subnets provisioning in existing VPC
HCL
165
star
22

prometheus-to-cloudwatch

Utility for scraping Prometheus metrics from a Prometheus client endpoint and publishing them to CloudWatch
Go
159
star
23

reference-architectures

[WIP] Get up and running quickly with one of our reference architecture using our fully automated cold-start process.
HCL
154
star
24

charts

The "Cloud Posse" Distribution of Kubernetes Applications
Mustache
149
star
25

terraform-aws-s3-bucket

Terraform module that creates an S3 bucket with an optional IAM user for external CI/CD systems
HCL
147
star
26

terraform-null-ansible

Terraform Module to run ansible playbooks
HCL
146
star
27

terraform-aws-ec2-instance

Terraform module for provisioning a general purpose EC2 host
HCL
143
star
28

terraform-aws-key-pair

Terraform Module to Automatically Generate SSH Key Pairs (Public/Private Keys)
HCL
141
star
29

terraform-aws-ecs-codepipeline

Terraform Module for CI/CD with AWS Code Pipeline and Code Build for ECS https://cloudposse.com/
HCL
139
star
30

terraform-aws-rds-cluster

Terraform module to provision an RDS Aurora cluster for MySQL or Postgres
HCL
135
star
31

terraform-aws-rds

Terraform module to provision AWS RDS instances
HCL
134
star
32

github-authorized-keys

Use GitHub teams to manage system user accounts and authorized_keys
Go
131
star
33

terraform-aws-ecs-alb-service-task

Terraform module which implements an ECS service which exposes a web service via ALB.
HCL
129
star
34

terraform-aws-elasticache-redis

Terraform module to provision an ElastiCache Redis Cluster
HCL
129
star
35

packages

Cloud Posse DevOps distribution of linux packages for native apps, binaries, alpine packages, debian packages, and redhat packages.
Shell
125
star
36

terraform-example-module

Example Terraform Module Scaffolding
HCL
125
star
37

terraform-aws-ec2-bastion-server

Terraform module to define a generic Bastion host with parameterized user_data and support for AWS SSM Session Manager for remote access with IAM authentication.
HCL
124
star
38

tfenv

Transform environment variables for use with Terraform (e.g. `HOSTNAME` ⇨ `TF_VAR_hostname`)
Go
123
star
39

terraform-terraform-label

Terraform Module to define a consistent naming convention by (namespace, stage, name, [attributes])
HCL
116
star
40

terraform-aws-s3-website

Terraform Module for Creating S3 backed Websites and Route53 DNS
HCL
114
star
41

terraform-aws-ec2-autoscale-group

Terraform module to provision Auto Scaling Group and Launch Template on AWS
HCL
113
star
42

terraform-aws-vpc-peering-multi-account

Terraform module to provision a VPC peering across multiple VPCs in different accounts by using multiple providers
HCL
108
star
43

terraform-aws-vpc-peering

Terraform module to create a peering connection between two VPCs in the same AWS account.
HCL
105
star
44

github-commenter

Command line utility for creating GitHub comments on Commits, Pull Request Reviews or Issues
Go
104
star
45

terraform-aws-rds-cloudwatch-sns-alarms

Terraform module that configures important RDS alerts using CloudWatch and sends them to an SNS topic
HCL
103
star
46

terraform-aws-s3-log-storage

This module creates an S3 bucket suitable for receiving logs from other AWS services such as S3, CloudFront, and CloudTrail
HCL
103
star
47

terraform-aws-iam-role

A Terraform module that creates IAM role with provided JSON IAM polices documents.
HCL
101
star
48

github-status-updater

Command line utility for updating GitHub commit statuses and enabling required status checks for pull requests
Go
100
star
49

terraform-aws-codebuild

Terraform Module to easily leverage AWS CodeBuild for Continuous Integration
HCL
96
star
50

terraform-aws-alb

Terraform module to provision a standard ALB for HTTP/HTTP traffic
HCL
94
star
51

terraform-aws-cloudfront-cdn

Terraform Module that implements a CloudFront Distribution (CDN) for a custom origin.
HCL
93
star
52

terraform-aws-ssm-parameter-store

Terraform module to populate AWS Systems Manager (SSM) Parameter Store with values from Terraform. Works great with Chamber.
HCL
93
star
53

terraform-aws-acm-request-certificate

Terraform module to request an ACM certificate for a domain name and create a CNAME record in the DNS zone to complete certificate validation
HCL
93
star
54

terraform-provider-utils

The Cloud Posse Terraform Provider for various utilities (e.g. deep merging, stack configuration management)
Go
93
star
55

terraform-aws-multi-az-subnets

Terraform module for multi-AZ public and private subnets provisioning
HCL
90
star
56

terraform-aws-cloudtrail

Terraform module to provision an AWS CloudTrail and an encrypted S3 bucket with versioning to store CloudTrail logs
HCL
90
star
57

sudosh

Shell wrapper to run a login shell with `sudo` as the current user for the purpose of audit logging
Go
88
star
58

terraform-aws-backup

Terraform module to provision AWS Backup, a fully managed backup service that makes it easy to centralize and automate the back up of data across AWS services such as EBS volumes, RDS databases, DynamoDB tables, EFS file systems, and AWS Storage Gateway volumes.
HCL
87
star
59

terraform-aws-eks-workers

Terraform module to provision an AWS AutoScaling Group, IAM Role, and Security Group for EKS Workers
HCL
84
star
60

terraform-aws-eks-node-group

Terraform module to provision a fully managed AWS EKS Node Group
HCL
82
star
61

terraform-aws-efs

Terraform Module to define an EFS Filesystem (aka NFS)
HCL
79
star
62

terraform-datadog-platform

Terraform module to configure and provision Datadog monitors, custom RBAC roles with permissions, Datadog synthetic tests, Datadog child organizations, and other Datadog resources from a YAML configuration, complete with automated tests.
HCL
79
star
63

terraform-aws-iam-system-user

Terraform Module to Provision a Basic IAM System User Suitable for CI/CD Systems (E.g. TravisCI, CircleCI)
HCL
76
star
64

terraform-aws-sso

Terraform module to configure AWS Single Sign-On (SSO)
HCL
76
star
65

terraform-aws-dynamodb

Terraform module that implements AWS DynamoDB with support for AutoScaling
HCL
72
star
66

terraform-aws-emr-cluster

Terraform module to provision an Elastic MapReduce (EMR) cluster on AWS
HCL
70
star
67

terraform-aws-msk-apache-kafka-cluster

Terraform module to provision AWS MSK
HCL
66
star
68

terraform-yaml-config

Terraform module to convert local and remote YAML configuration templates into Terraform lists and maps
HCL
66
star
69

terraform-aws-iam-user

Terraform Module to provision a basic IAM user suitable for humans.
HCL
66
star
70

slack-notifier

Command line utility to send messages with attachments to Slack channels via Incoming Webhooks
Go
65
star
71

terraform-aws-cloudwatch-logs

Terraform Module to Provide a CloudWatch Logs Endpoint
HCL
61
star
72

terraform-aws-kms-key

Terraform module to provision a KMS key with alias
HCL
61
star
73

actions

Our Library of GitHub Actions
TypeScript
57
star
74

terraform-aws-iam-s3-user

Terraform module to provision a basic IAM user with permissions to access S3 resources, e.g. to give the user read/write/delete access to the objects in an S3 bucket
HCL
53
star
75

load-testing

A collection of best practices, workflows, scripts and scenarios that Cloud Posse uses for load and performance testing of websites and applications (in particular those deployed on Kubernetes clusters)
JavaScript
52
star
76

docs

πŸ“˜ SweetOps documentation for the Cloud Posse way of doing Infrastructure as Code. https://docs.cloudposse.com
Python
51
star
77

terraform-aws-documentdb-cluster

Terraform module to provision a DocumentDB cluster on AWS
HCL
51
star
78

terraform-aws-iam-policy-document-aggregator

Terraform module to aggregate multiple IAM policy documents into single policy document.
HCL
50
star
79

terraform-aws-vpn-connection

Terraform module to provision a site-to-site VPN connection between a VPC and an on-premises network
HCL
49
star
80

terraform-aws-route53-alias

Terraform Module to Define Vanity Host/Domain (e.g. `brand.com`) as an ALIAS record
HCL
48
star
81

terraform-aws-ecs-atlantis

Terraform module for deploying Atlantis as an ECS Task
HCL
47
star
82

terraform-aws-cloudtrail-s3-bucket

S3 bucket with built in IAM policy to allow CloudTrail logs
HCL
47
star
83

terraform-yaml-stack-config

Terraform module that loads an opinionated "stack" configuration from local or remote YAML sources. It supports deep-merged variables, settings, ENV variables, backend config, and remote state outputs for Terraform and helmfile components.
HCL
47
star
84

terraform-aws-transit-gateway

Terraform module to provision AWS Transit Gateway, AWS Resource Access Manager (AWS RAM) Resource, and share the Transit Gateway with the Organization or another AWS Account.
HCL
46
star
85

terraform-aws-route53-cluster-zone

Terraform module to easily define consistent cluster domains on Route53 (e.g. `prod.ourcompany.com`)
HCL
46
star
86

terraform-aws-named-subnets

Terraform module for named subnets provisioning.
HCL
45
star
87

terraform-aws-route53-cluster-hostname

Terraform module to define a consistent AWS Route53 hostname
HCL
45
star
88

terraform-aws-elastic-beanstalk-application

Terraform Module to define an ElasticBeanstalk Application
HCL
44
star
89

terraform-aws-config

This module configures AWS Config, a service that enables you to assess, audit, and evaluate the configurations of your AWS resources.
HCL
43
star
90

terraform-aws-eks-fargate-profile

Terraform module to provision an EKS Fargate Profile
HCL
42
star
91

terraform-aws-efs-backup

Terraform module designed to easily backup EFS filesystems to S3 using DataPipeline
HCL
41
star
92

terraform-aws-sns-topic

Terraform Module to Provide an Amazon Simple Notification Service (SNS)
HCL
40
star
93

terraform-aws-service-control-policies

Terraform module to provision Service Control Policies (SCP) for AWS Organizations, Organizational Units, and AWS accounts
HCL
38
star
94

terraform-aws-cloudformation-stack

Terraform module to provision CloudFormation Stack
HCL
38
star
95

terraform-aws-ec2-client-vpn

HCL
37
star
96

terraform-provider-awsutils

Terraform provider to help with various AWS automation tasks (mostly all that stuff we cannot accomplish with the official AWS terraform provider)
Go
36
star
97

terraform-aws-ecs-cloudwatch-sns-alarms

Terraform module to create CloudWatch Alarms on ECS Service level metrics.
HCL
36
star
98

terraform-aws-iam-assumed-roles

Terraform Module for Assumed Roles on AWS with IAM Groups Requiring MFA
HCL
33
star
99

terraform-aws-mq-broker

Terraform module for provisioning an AmazonMQ broker
HCL
33
star
100

terraform-tls-ssh-key-pair

Terraform module for generating an SSH public/private key file.
HCL
33
star