terraform-aws-client-vpn

The terraform-aws-client-vpn module creates an AWS Client VPN Endpoint. It contains scripts to generate the required certificates and OpenVPN config file.

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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.

Here's how to invoke this example module in your projects

module vpn {
  source = "git::https://github.com/deploymode/terraform-aws-client-vpn.git?ref=master"

  context = module.this.context

  vpn_client_cidr               = var.vpn_client_cidr
  cert_dir                      = var.cert_dir
  config_dir                    = var.config_dir
  cert_domain                   = var.cert_domain
  subnet_ids                    = [aws_subnet.vpn.id]
  security_groups               = var.security_groups
  logging_enabled               = var.logging_enabled
  cloudwatch_log_retention_days = var.cloudwatch_log_retention_days
}

Examples

Here is an example of using this module:

• examples/complete - complete example of using this module
  • Note: you must create subnets before creating the rest of the resources. This can be done with:

    terraform apply -var-file=fixtures.us-east-2.tfvars -target=aws_subnet.vpn
    terraform apply -var-file=fixtures.us-east-2.tfvars

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	>= 5.12.0
local	>= 2.4.0
null	>= 3.2.1
random	>= 3.5.1

Providers

Name	Version
aws	>= 5.12.0
null	>= 3.2.1

Modules

Name	Source	Version
this	cloudposse/label/null	0.25.0

Resources

Name	Type
aws_acm_certificate.client	resource
aws_acm_certificate.server	resource
aws_cloudwatch_log_group.default	resource
aws_cloudwatch_log_stream.default	resource
aws_ec2_client_vpn_authorization_rule.ingress-all	resource
aws_ec2_client_vpn_endpoint.default	resource
aws_ec2_client_vpn_network_association.default	resource
aws_ec2_client_vpn_route.internet-access	resource
null_resource.append-client-config-certs	resource
null_resource.export-client-config	resource
aws_region.current	data source

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_ingress_network_cidr	CIDR to which VPC clients are allowed access	string	"0.0.0.0/0"	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
cert_dir	Local storage location for generated certs. Relative to module root.	string	"certs"	no
cert_domain	Domain suffix for certificates	string	n/a	yes
cloudwatch_log_retention_days	Retention in days for CloudWatch Log Group	number	30	no
config_dir	Local storage location for downloaded VPN config. Relative to module root.	string	"config"	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
enable_internet_access	If true, add a route to 0.0.0.0/0 on VPN endpoint route table. Your VPN subnet must also have a route to an Internet Gateway.	bool	false	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
logging_enabled	Enable CloudWatch logging	bool	false	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
security_groups	Security groups to associate with Client VPN network association	list(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	Subnet ID to associate clients	list(string)	[]	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
vpc_id	VPC ID to associate clients. Must be supplied if subnet_ids is set.	string	null	no
vpn_client_cidr	Network CIDR for allocating IPs to VPN clients	string	n/a	yes

Outputs

Name	Description
arn	The ARN of the Client VPN endpoint.
dns_name	The DNS name to be used by clients when establishing their VPN session.
id	The ID of the Client VPN endpoint.
vpn_config_path	Path to downloaded VPN config file

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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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Copyrights

Copyright © 2020-2023 Original Mind Pty Ltd

License

See LICENSE for full details.

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

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Contributors

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