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97 changes: 57 additions & 40 deletions README.md
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# terraform-aws-vpc-peering [![Latest Release](https://img.shields.io/github/release/cloudposse/terraform-aws-vpc-peering.svg)](https://github.com/cloudposse/terraform-aws-vpc-peering/releases/latest) [![Slack Community](https://slack.cloudposse.com/badge.svg)](https://slack.cloudposse.com)
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Terraform module to create a peering connection between two VPCs


---

This project is part of our comprehensive ["SweetOps"](https://cpco.io/sweetops) approach towards DevOps.
Expand Down Expand Up @@ -57,8 +57,6 @@ We literally have [*hundreds of terraform modules*][terraform_modules] that are





## Screenshots


Expand Down Expand Up @@ -161,56 +159,76 @@ Available targets:

| Name | Version |
|------|---------|
| terraform | >= 0.13.0 |
| aws | >= 2.0 |
| local | >= 1.3 |
| template | >= 2.0 |
| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 0.13.0 |
| <a name="requirement_aws"></a> [aws](#requirement\_aws) | >= 2.0 |
| <a name="requirement_local"></a> [local](#requirement\_local) | >= 1.3 |
| <a name="requirement_template"></a> [template](#requirement\_template) | >= 2.0 |

## Providers

| Name | Version |
|------|---------|
| aws | >= 2.0 |
| <a name="provider_aws"></a> [aws](#provider\_aws) | >= 2.0 |

## Modules

| Name | Source | Version |
|------|--------|---------|
| <a name="module_this"></a> [this](#module\_this) | cloudposse/label/null | 0.25.0 |

## Resources

| Name | Type |
|------|------|
| [aws_route.acceptor](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/route) | resource |
| [aws_route.requestor](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/route) | resource |
| [aws_vpc_peering_connection.default](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/resources/vpc_peering_connection) | resource |
| [aws_route_tables.acceptor](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/route_tables) | data source |
| [aws_route_tables.requestor](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/route_tables) | data source |
| [aws_vpc.acceptor](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/vpc) | data source |
| [aws_vpc.requestor](https://registry.terraform.io/providers/hashicorp/aws/latest/docs/data-sources/vpc) | data source |

## Inputs

| Name | Description | Type | Default | Required |
|------|-------------|------|---------|:--------:|
| acceptor\_allow\_remote\_vpc\_dns\_resolution | Allow acceptor VPC to resolve public DNS hostnames to private IP addresses when queried from instances in the requestor VPC | `bool` | `true` | no |
| acceptor\_route\_table\_tags | Only add peer routes to acceptor VPC route tables matching these tags | `map(string)` | `{}` | no |
| acceptor\_vpc\_id | Acceptor VPC ID | `string` | `""` | no |
| acceptor\_vpc\_tags | Acceptor VPC tags | `map(string)` | `{}` | no |
| additional\_tag\_map | Additional tags for appending to tags\_as\_list\_of\_maps. Not added to `tags`. | `map(string)` | `{}` | no |
| attributes | Additional attributes (e.g. `1`) | `list(string)` | `[]` | no |
| auto\_accept | Automatically accept the peering (both VPCs need to be in the same AWS account) | `bool` | `true` | no |
| context | Single object for setting entire context at once.<br>See description of individual variables for details.<br>Leave string and numeric variables as `null` to use default value.<br>Individual variable settings (non-null) override settings in context object,<br>except for attributes, tags, and additional\_tag\_map, which are merged. | `any` | <pre>{<br> "additional_tag_map": {},<br> "attributes": [],<br> "delimiter": null,<br> "enabled": true,<br> "environment": null,<br> "id_length_limit": null,<br> "label_key_case": null,<br> "label_order": [],<br> "label_value_case": null,<br> "name": null,<br> "namespace": null,<br> "regex_replace_chars": null,<br> "stage": null,<br> "tags": {}<br>}</pre> | no |
| create\_timeout | VPC peering connection create timeout. For more details, see https://www.terraform.io/docs/configuration/resources.html#operation-timeouts | `string` | `"3m"` | no |
| delete\_timeout | VPC peering connection delete timeout. For more details, see https://www.terraform.io/docs/configuration/resources.html#operation-timeouts | `string` | `"5m"` | no |
| delimiter | Delimiter to be used between `namespace`, `environment`, `stage`, `name` and `attributes`.<br>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | 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 (minimum 6).<br>Set to `0` for unlimited length.<br>Set to `null` for default, which is `0`.<br>Does not affect `id_full`. | `number` | `null` | no |
| label\_key\_case | The letter case of label keys (`tag` names) (i.e. `name`, `namespace`, `environment`, `stage`, `attributes`) to use in `tags`.<br>Possible values: `lower`, `title`, `upper`.<br>Default value: `title`. | `string` | `null` | no |
| label\_order | The naming order of the id output and Name tag.<br>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br>You can omit any of the 5 elements, but at least one must be present. | `list(string)` | `null` | no |
| label\_value\_case | The letter case of output label values (also used in `tags` and `id`).<br>Possible values: `lower`, `title`, `upper` and `none` (no transformation).<br>Default value: `lower`. | `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 |
| regex\_replace\_chars | Regex to replace chars with empty string in `namespace`, `environment`, `stage` and `name`.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
| requestor\_allow\_remote\_vpc\_dns\_resolution | Allow requestor VPC to resolve public DNS hostnames to private IP addresses when queried from instances in the acceptor VPC | `bool` | `true` | no |
| requestor\_route\_table\_tags | Only add peer routes to requestor VPC route tables matching these tags | `map(string)` | `{}` | no |
| requestor\_vpc\_id | Requestor VPC ID | `string` | `""` | no |
| requestor\_vpc\_tags | Requestor VPC tags | `map(string)` | `{}` | 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 |
| update\_timeout | VPC peering connection update timeout. For more details, see https://www.terraform.io/docs/configuration/resources.html#operation-timeouts | `string` | `"3m"` | no |
| <a name="input_acceptor_allow_remote_vpc_dns_resolution"></a> [acceptor\_allow\_remote\_vpc\_dns\_resolution](#input\_acceptor\_allow\_remote\_vpc\_dns\_resolution) | Allow acceptor VPC to resolve public DNS hostnames to private IP addresses when queried from instances in the requestor VPC | `bool` | `true` | no |
| <a name="input_acceptor_route_table_tags"></a> [acceptor\_route\_table\_tags](#input\_acceptor\_route\_table\_tags) | Only add peer routes to acceptor VPC route tables matching these tags | `map(string)` | `{}` | no |
| <a name="input_acceptor_vpc_id"></a> [acceptor\_vpc\_id](#input\_acceptor\_vpc\_id) | Acceptor VPC ID | `string` | `""` | no |
| <a name="input_acceptor_vpc_tags"></a> [acceptor\_vpc\_tags](#input\_acceptor\_vpc\_tags) | Acceptor VPC tags | `map(string)` | `{}` | no |
| <a name="input_additional_tag_map"></a> [additional\_tag\_map](#input\_additional\_tag\_map) | Additional key-value pairs to add to each map in `tags_as_list_of_maps`. Not added to `tags` or `id`.<br>This is for some rare cases where resources want additional configuration of tags<br>and therefore take a list of maps with tag key, value, and additional configuration. | `map(string)` | `{}` | no |
| <a name="input_attributes"></a> [attributes](#input\_attributes) | ID element. Additional attributes (e.g. `workers` or `cluster`) to add to `id`,<br>in the order they appear in the list. New attributes are appended to the<br>end of the list. The elements of the list are joined by the `delimiter`<br>and treated as a single ID element. | `list(string)` | `[]` | no |
| <a name="input_auto_accept"></a> [auto\_accept](#input\_auto\_accept) | Automatically accept the peering (both VPCs need to be in the same AWS account) | `bool` | `true` | no |
| <a name="input_context"></a> [context](#input\_context) | Single object for setting entire context at once.<br>See description of individual variables for details.<br>Leave string and numeric variables as `null` to use default value.<br>Individual variable settings (non-null) override settings in context object,<br>except for attributes, tags, and additional\_tag\_map, which are merged. | `any` | <pre>{<br> "additional_tag_map": {},<br> "attributes": [],<br> "delimiter": null,<br> "descriptor_formats": {},<br> "enabled": true,<br> "environment": null,<br> "id_length_limit": null,<br> "label_key_case": null,<br> "label_order": [],<br> "label_value_case": null,<br> "labels_as_tags": [<br> "unset"<br> ],<br> "name": null,<br> "namespace": null,<br> "regex_replace_chars": null,<br> "stage": null,<br> "tags": {},<br> "tenant": null<br>}</pre> | no |
| <a name="input_create_timeout"></a> [create\_timeout](#input\_create\_timeout) | VPC peering connection create timeout. For more details, see https://www.terraform.io/docs/configuration/resources.html#operation-timeouts | `string` | `"3m"` | no |
| <a name="input_delete_timeout"></a> [delete\_timeout](#input\_delete\_timeout) | VPC peering connection delete timeout. For more details, see https://www.terraform.io/docs/configuration/resources.html#operation-timeouts | `string` | `"5m"` | no |
| <a name="input_delimiter"></a> [delimiter](#input\_delimiter) | Delimiter to be used between ID elements.<br>Defaults to `-` (hyphen). Set to `""` to use no delimiter at all. | `string` | `null` | no |
| <a name="input_descriptor_formats"></a> [descriptor\_formats](#input\_descriptor\_formats) | Describe additional descriptors to be output in the `descriptors` output map.<br>Map of maps. Keys are names of descriptors. Values are maps of the form<br>`{<br> format = string<br> labels = list(string)<br>}`<br>(Type is `any` so the map values can later be enhanced to provide additional options.)<br>`format` is a Terraform format string to be passed to the `format()` function.<br>`labels` is a list of labels, in order, to pass to `format()` function.<br>Label values will be normalized before being passed to `format()` so they will be<br>identical to how they appear in `id`.<br>Default is `{}` (`descriptors` output will be empty). | `any` | `{}` | no |
| <a name="input_enabled"></a> [enabled](#input\_enabled) | Set to false to prevent the module from creating any resources | `bool` | `null` | no |
| <a name="input_environment"></a> [environment](#input\_environment) | ID element. Usually used for region e.g. 'uw2', 'us-west-2', OR role 'prod', 'staging', 'dev', 'UAT' | `string` | `null` | no |
| <a name="input_id_length_limit"></a> [id\_length\_limit](#input\_id\_length\_limit) | Limit `id` to this many characters (minimum 6).<br>Set to `0` for unlimited length.<br>Set to `null` for keep the existing setting, which defaults to `0`.<br>Does not affect `id_full`. | `number` | `null` | no |
| <a name="input_label_key_case"></a> [label\_key\_case](#input\_label\_key\_case) | Controls the letter case of the `tags` keys (label names) for tags generated by this module.<br>Does not affect keys of tags passed in via the `tags` input.<br>Possible values: `lower`, `title`, `upper`.<br>Default value: `title`. | `string` | `null` | no |
| <a name="input_label_order"></a> [label\_order](#input\_label\_order) | The order in which the labels (ID elements) appear in the `id`.<br>Defaults to ["namespace", "environment", "stage", "name", "attributes"].<br>You can omit any of the 6 labels ("tenant" is the 6th), but at least one must be present. | `list(string)` | `null` | no |
| <a name="input_label_value_case"></a> [label\_value\_case](#input\_label\_value\_case) | Controls the letter case of ID elements (labels) as included in `id`,<br>set as tag values, and output by this module individually.<br>Does not affect values of tags passed in via the `tags` input.<br>Possible values: `lower`, `title`, `upper` and `none` (no transformation).<br>Set this to `title` and set `delimiter` to `""` to yield Pascal Case IDs.<br>Default value: `lower`. | `string` | `null` | no |
| <a name="input_labels_as_tags"></a> [labels\_as\_tags](#input\_labels\_as\_tags) | Set of labels (ID elements) to include as tags in the `tags` output.<br>Default is to include all labels.<br>Tags with empty values will not be included in the `tags` output.<br>Set to `[]` to suppress all generated tags.<br>**Notes:**<br> The value of the `name` tag, if included, will be the `id`, not the `name`.<br> Unlike other `null-label` inputs, the initial setting of `labels_as_tags` cannot be<br> changed in later chained modules. Attempts to change it will be silently ignored. | `set(string)` | <pre>[<br> "default"<br>]</pre> | no |
| <a name="input_name"></a> [name](#input\_name) | ID element. Usually the component or solution name, e.g. 'app' or 'jenkins'.<br>This is the only ID element not also included as a `tag`.<br>The "name" tag is set to the full `id` string. There is no tag with the value of the `name` input. | `string` | `null` | no |
| <a name="input_namespace"></a> [namespace](#input\_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 |
| <a name="input_regex_replace_chars"></a> [regex\_replace\_chars](#input\_regex\_replace\_chars) | Terraform regular expression (regex) string.<br>Characters matching the regex will be removed from the ID elements.<br>If not set, `"/[^a-zA-Z0-9-]/"` is used to remove all characters other than hyphens, letters and digits. | `string` | `null` | no |
| <a name="input_requestor_allow_remote_vpc_dns_resolution"></a> [requestor\_allow\_remote\_vpc\_dns\_resolution](#input\_requestor\_allow\_remote\_vpc\_dns\_resolution) | Allow requestor VPC to resolve public DNS hostnames to private IP addresses when queried from instances in the acceptor VPC | `bool` | `true` | no |
| <a name="input_requestor_route_table_tags"></a> [requestor\_route\_table\_tags](#input\_requestor\_route\_table\_tags) | Only add peer routes to requestor VPC route tables matching these tags | `map(string)` | `{}` | no |
| <a name="input_requestor_vpc_id"></a> [requestor\_vpc\_id](#input\_requestor\_vpc\_id) | Requestor VPC ID | `string` | `""` | no |
| <a name="input_requestor_vpc_tags"></a> [requestor\_vpc\_tags](#input\_requestor\_vpc\_tags) | Requestor VPC tags | `map(string)` | `{}` | no |
| <a name="input_stage"></a> [stage](#input\_stage) | ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release' | `string` | `null` | no |
| <a name="input_tags"></a> [tags](#input\_tags) | Additional tags (e.g. `{'BusinessUnit': 'XYZ'}`).<br>Neither the tag keys nor the tag values will be modified by this module. | `map(string)` | `{}` | no |
| <a name="input_tenant"></a> [tenant](#input\_tenant) | ID element \_(Rarely used, not included by default)\_. A customer identifier, indicating who this instance of a resource is for | `string` | `null` | no |
| <a name="input_update_timeout"></a> [update\_timeout](#input\_update\_timeout) | VPC peering connection update timeout. For more details, see https://www.terraform.io/docs/configuration/resources.html#operation-timeouts | `string` | `"3m"` | no |

## Outputs

| Name | Description |
|------|-------------|
| accept\_status | The status of the VPC peering connection request |
| connection\_id | VPC peering connection ID |

| <a name="output_accept_status"></a> [accept\_status](#output\_accept\_status) | The status of the VPC peering connection request |
| <a name="output_connection_id"></a> [connection\_id](#output\_connection\_id) | VPC peering connection ID |
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Expand All @@ -222,6 +240,7 @@ Like this project? Please give it a ★ on [our GitHub](https://github.com/cloud
Are you using this project or any of our other projects? Consider [leaving a testimonial][testimonial]. =)



## Related Projects

Check out these related projects.
Expand All @@ -230,8 +249,6 @@ Check out these related projects.
- [terraform-aws-kops-vpc-peering](https://github.com/cloudposse/terraform-aws-kops-vpc-peering) - Terraform module to create a peering connection between two VPCs




## References

For additional context, refer to some of these links.
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