BetterWorks / terraform-terraform-label

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

terraform-terraform-label

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

terraform-terraform-label is a fork of terraform-null-label which uses only the core Terraform provider.

A label follows the following convention: {namespace}-{stage}-{name}-{attributes}. The delimiter (e.g. -) is interchangeable.

It's recommended to use one terraform-terraform-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.

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

NOTE: The second terraform word in terraform-terraform-label refers to the primary Terraform provider used in this module.

---

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!

Usage

Simple Example

Include this repository as a module in your existing terraform code:

module "eg_prod_bastion_label" {
  source     = "git::https://github.com/cloudposse/terraform-terraform-label.git?ref=master"
  namespace  = "eg"
  stage      = "prod"
  name       = "bastion"
  attributes = ["public"]
  delimiter  = "-"
  tags       = "${map("BusinessUnit", "XYZ", "Snapshot", "true")}"
}

This will create an id with the value of eg-prod-bastion-public.

Now reference the label when creating an instance (for example):

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.

module "eg_prod_bastion_abc_label" {
  source     = "git::https://github.com/cloudposse/terraform-terraform-label.git?ref=master"
  namespace  = "eg"
  stage      = "prod"
  name       = "bastion"
  attributes = ["abc"]
  delimiter  = "-"
  tags       = "${map("BusinessUnit", "ABC")}"
}

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     = "git::https://github.com/cloudposse/terraform-null-label.git?ref=master"
  namespace  = "eg"
  stage      = "prod"
  name       = "bastion"
  attributes = ["xyz"]
  delimiter  = "-"
  tags       = "${map("BusinessUnit", "XYZ")}"
}

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}"]
}

Makefile Targets

Available targets:

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

Inputs

Name	Description	Type	Default	Required
attributes	Additional attributes, e.g. 1	list	<list>	no
convert_case	Convert fields to lower case	string	true	no
delimiter	Delimiter to be used between namespace, name, stage and attributes	string	-	no
enabled	Set to false to prevent the module from creating any resources	string	true	no
name	Solution name, e.g. app	string	-	yes
namespace	Namespace, which could be your organization name, e.g. cp or cloudposse	string	-	yes
stage	Stage, e.g. prod, staging, dev, or test	string	-	yes
tags	Additional tags (e.g. map(BusinessUnit,XYZ`)	map	<map>	no

Outputs

Name	Description
attributes	Normalized attributes
id	Disambiguated ID
name	Normalized name
namespace	Normalized namespace
stage	Normalized stage
tags	Normalized Tag map

Share the Love

Like this project? Please give it a ★ on our GitHub! (it helps us a lot)

Are you using this project or any of our other projects? Consider leaving a testimonial. =)

Related Projects

Check out these related projects.

• terraform-null-label - Terraform Module to define a consistent naming convention by (namespace, stage, name, [attributes])

Help

Got a question?

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

Commercial Support

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

We provide commercial support for all of our Open Source projects. As a Dedicated Support customer, you have access to our team of subject matter experts at a fraction of the cost of a full-time engineer.

• Questions. We'll use a Shared Slack channel between your team and ours.
• Troubleshooting. We'll help you triage why things aren't working.
• Code Reviews. We'll review your Pull Requests and provide constructive feedback.
• Bug Fixes. We'll rapidly work to fix any bugs in our projects.
• Build New Terraform Modules. We'll develop original modules to provision infrastructure.
• Cloud Architecture. We'll assist with your cloud strategy and design.
• Implementation. We'll provide hands-on support to implement our reference architectures.

Terraform Module Development

Are you interested in custom Terraform module development? Submit your inquiry using our form today and we'll get back to you ASAP.

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.

Newsletter

Signup 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.

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 © 2017-2018 Cloud Posse, LLC

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!

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	Sarkis Varozian	Andriy Knysh	Jamie Nelson