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Cloud Posse

Terraform module to provision a KMS key with alias.

Can be used with chamber for managing secrets by storing them in Amazon EC2 Systems Manager Parameter Store.


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!

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.

    module "kms_key" {
      source = "cloudposse/kms-key/aws"
      # Cloud Posse recommends pinning every module to a specific version
      # version = "x.x.x"
      namespace               = "eg"
      stage                   = "test"
      name                    = "chamber"
      description             = "KMS key for chamber"
      deletion_window_in_days = 10
      enable_key_rotation     = true
      alias                   = "alias/parameter_store_key"
    }

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 >= 0.12.26
aws >= 3.0
local >= 1.3
null >= 2.0

Providers

Name Version
aws >= 3.0

Inputs

Name Description Type Default Required
additional_tag_map Additional tags for appending to tags_as_list_of_maps. Not added to tags. map(string) {} no
alias The display name of the alias. The name must start with the word alias followed by a forward slash string "" no
attributes Additional attributes (e.g. 1) 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.
object({
enabled = bool
namespace = string
environment = string
stage = string
name = string
delimiter = string
attributes = list(string)
tags = map(string)
additional_tag_map = map(string)
regex_replace_chars = string
label_order = list(string)
id_length_limit = number
})
{
"additional_tag_map": {},
"attributes": [],
"delimiter": null,
"enabled": true,
"environment": null,
"id_length_limit": null,
"label_order": [],
"name": null,
"namespace": null,
"regex_replace_chars": null,
"stage": null,
"tags": {}
}
no
deletion_window_in_days Duration in days after which the key is deleted after destruction of the resource number 10 no
delimiter Delimiter to be used between namespace, environment, stage, name and attributes.
Defaults to - (hyphen). Set to "" to use no delimiter at all.
string null no
description The description of the key as viewed in AWS console string "Parameter Store KMS master key" no
enable_key_rotation Specifies whether key rotation is enabled bool true no
enabled Set to false to prevent the module from creating any resources bool null no
environment Environment, e.g. 'uw2', 'us-west-2', OR 'prod', 'staging', 'dev', 'UAT' string null no
id_length_limit Limit id to this many characters.
Set to 0 for unlimited length.
Set to null for default, which is 0.
Does not affect id_full.
number null no
label_order The naming order of the id output and Name tag.
Defaults to ["namespace", "environment", "stage", "name", "attributes"].
You can omit any of the 5 elements, but at least one must be present.
list(string) null no
name Solution name, e.g. 'app' or 'jenkins' string null no
namespace Namespace, which could be your organization name or abbreviation, e.g. 'eg' or 'cp' string null no
policy A valid KMS policy JSON document. Note that if the policy document is not specific enough (but still valid), Terraform may view the policy as constantly changing in a terraform plan. In this case, please make sure you use the verbose/specific version of the policy. string "" no
regex_replace_chars Regex to replace chars with empty string in namespace, environment, stage and name.
If not set, "/[^a-zA-Z0-9-]/" is used to remove all characters other than hyphens, letters and digits.
string null no
stage Stage, e.g. 'prod', 'staging', 'dev', OR 'source', 'build', 'test', 'deploy', 'release' string null no
tags Additional tags (e.g. map('BusinessUnit','XYZ') map(string) {} no

Outputs

Name Description
alias_arn Alias ARN
alias_name Alias name
key_arn Key ARN
key_id Key ID

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Related Projects

Check out these related projects.

  • terraform-aws-iam-chamber-user - Terraform module to provision a basic IAM chamber user with access to SSM parameters and KMS key to decrypt secrets, suitable for CI/CD systems (e.g. TravisCI, CircleCI, CodeFresh) or systems which are external to AWS that cannot leverage AWS IAM Instance Profiles
  • terraform-aws-ssm-parameter-store - Terraform module to populate AWS Systems Manager (SSM) Parameter Store with values from Terraform. Works great with Chamber.
  • terraform-aws-ssm-iam-role - Terraform module to provision an IAM role with configurable permissions to access SSM Parameter Store

Help

Got a question? We got answers.

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

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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 © 2017-2020 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

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Contributors

Andriy Knysh
Andriy Knysh
Erik Osterman
Erik Osterman
Igor Rodionov
Igor Rodionov

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