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Cloud Posse

This is terraform-aws-transfer-sftp 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.

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.

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 "example" {
  source = "https://github.com/cloudposse/terraform-aws-transfer-sftp.git?ref=master"
  example = "Hello world!"
}

Examples

Here is an 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 >= 0.13
aws >= 3.0

Providers

Name Version
aws >= 3.0

Modules

Name Source Version
iam_label cloudposse/label/null 0.25.0
logging_label cloudposse/label/null 0.25.0
security_group cloudposse/security-group/aws 0.3.1
this cloudposse/label/null 0.25.0

Resources

Name Type
aws_eip.sftp resource
aws_iam_policy.logging resource
aws_iam_policy.s3_access_for_sftp_users resource
aws_iam_role.logging resource
aws_iam_role.s3_access_for_sftp_users resource
aws_route53_record.main resource
aws_transfer_server.default resource
aws_transfer_ssh_key.default resource
aws_transfer_user.default resource
aws_iam_policy_document.assume_role_policy data source
aws_iam_policy_document.logging data source
aws_iam_policy_document.s3_access_for_sftp_users data source
aws_s3_bucket.landing 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
address_allocation_ids A list of address allocation IDs that are required to attach an Elastic IP address to your SFTP server's endpoint. This property can only be used when endpoint_type is set to VPC. list(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
domain Where your files are stored. S3 or EFS string "S3" no
domain_name Domain to use when connecting to the SFTP endpoint string "" no
eip_enabled Whether to provision and attach an Elastic IP to be used as the SFTP endpoint. An EIP will be provisioned per subnet. 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
force_destroy Forces the AWS Transfer Server to be destroyed bool false 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
restricted_home Restricts SFTP users so they only have access to their home directories. bool true no
s3_bucket_name This is the bucket that the SFTP users will use when managing files string n/a yes
security_group_description The Security Group description. string "AWS Transfer Server Security Group" no
security_group_enabled Whether to create default Security Group for AWS Transfer Server. bool true no
security_group_rules A list of maps of Security Group rules.
The values of map is fully complated with aws_security_group_rule resource.
To get more info see https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/security_group_rule .		 list(any) 
[
  {
    "cidr_blocks": [
      "0.0.0.0/0"
    ],
    "description": "Allow inbound traffic",
    "from_port": 22,
    "protocol": "tcp",
    "to_port": 22,
    "type": "ingress"
  }
]
 no
security_group_use_name_prefix Whether to create a default Security Group with unique name beginning with the normalized prefix. bool false no
security_policy_name Specifies the name of the security policy that is attached to the server. Possible values are TransferSecurityPolicy-2018-11, TransferSecurityPolicy-2020-06, and TransferSecurityPolicy-FIPS-2020-06. Default value is: TransferSecurityPolicy-2018-11. string "TransferSecurityPolicy-2018-11" no
sftp_users List of SFTP usernames and public keys 
map(object({
    user_name  = string,
    public_key = string
  }))
 {} no
stage ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release' string null no
subnet_ids A list of subnet IDs that are required to host your SFTP server endpoint in your VPC. This property can only be used when endpoint_type is set to VPC. 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_endpoint_id The ID of the VPC endpoint. This property can only be used when endpoint_type is set to VPC_ENDPOINT string null no
vpc_id VPC ID that the AWS Transfer Server will be deployed to string null no
vpc_security_group_ids A list of security groups IDs that are available to attach to your server's endpoint. If no security groups are specified, the VPC's default security groups are automatically assigned to your endpoint. This property can only be used when endpoint_type is set to VPC. list(string) [] no
zone_id Route53 Zone ID to add the CNAME string "" no
pre_authentication_login_banner Pre authentication login banner to add the display banner string "" no

Outputs

Name Description
elastic_ips Provisioned Elastic IPs
id ID of the created example
transfer_endpoint The endpoint of the Transfer Server

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

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

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  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!

Copyrights

Copyright © 2020-2021 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
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Contributors

Erik Osterman
Erik Osterman

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