Awesome

This component is responsible for provisioning a VPC and corresponding Subnets. Additionally, VPC Flow Logs can optionally be enabled for auditing purposes. See the existing VPC configuration documentation for the provisioned subnets.

Usage

Stack Level: Regional

Here's an example snippet for how to use this component.

# catalog/vpc/defaults or catalog/vpc
components:
  terraform:
    vpc/defaults:
      metadata:
        type: abstract
        component: vpc
      settings:
        spacelift:
          workspace_enabled: true
      vars:
        enabled: true
        name: vpc
        availability_zones:
          - "a"
          - "b"
          - "c"
        nat_gateway_enabled: true
        nat_instance_enabled: false
        max_subnet_count: 3
        vpc_flow_logs_enabled: true
        vpc_flow_logs_bucket_environment_name: <environment>
        vpc_flow_logs_bucket_stage_name: audit
        vpc_flow_logs_traffic_type: "ALL"
        subnet_type_tag_key: "example.net/subnet/type"
        assign_generated_ipv6_cidr_block: true

import:
  - catalog/vpc

components:
  terraform:
    vpc:
      metadata:
        component: vpc
        inherits:
          - vpc/defaults
      vars:
        ipv4_primary_cidr_block: "10.111.0.0/18"

Requirements

Name	Version
<a name="requirement_terraform"></a> terraform	>= 1.0.0
<a name="requirement_aws"></a> aws	>= 4.9.0

Providers

Name	Version
<a name="provider_aws"></a> aws	>= 4.9.0

Modules

Name	Source	Version
<a name="module_endpoint_security_groups"></a> endpoint_security_groups	cloudposse/security-group/aws	2.2.0
<a name="module_iam_roles"></a> iam_roles	../account-map/modules/iam-roles	n/a
<a name="module_subnets"></a> subnets	cloudposse/dynamic-subnets/aws	2.4.2
<a name="module_this"></a> this	cloudposse/label/null	0.25.0
<a name="module_utils"></a> utils	cloudposse/utils/aws	1.3.0
<a name="module_vpc"></a> vpc	cloudposse/vpc/aws	2.1.0
<a name="module_vpc_endpoints"></a> vpc_endpoints	cloudposse/vpc/aws//modules/vpc-endpoints	2.1.0
<a name="module_vpc_flow_logs_bucket"></a> vpc_flow_logs_bucket	cloudposse/stack-config/yaml//modules/remote-state	1.5.0

Resources

Name	Type
aws_flow_log.default	resource
aws_shield_protection.nat_eip_shield_protection	resource
aws_caller_identity.current	data source
aws_eip.eip	data source

Inputs

Name	Description	Type	Default	Required
<a name="input_additional_tag_map"></a> 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_assign_generated_ipv6_cidr_block"></a> assign_generated_ipv6_cidr_block	When `true`, assign AWS generated IPv6 CIDR block to the VPC. Conflicts with `ipv6_ipam_pool_id`.	`bool`	`false`	no
<a name="input_attributes"></a> 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_availability_zone_ids"></a> availability_zone_ids	List of Availability Zones IDs where subnets will be created. Overrides `availability_zones`.<br>Can be the full name, e.g. `use1-az1`, or just the part after the AZ ID region code, e.g. `-az1`,<br>to allow reusable values across regions. Consider contention for resources and spot pricing in each AZ when selecting.<br>Useful in some regions when using only some AZs and you want to use the same ones across multiple accounts.	`list(string)`	`[]`	no
<a name="input_availability_zones"></a> availability_zones	List of Availability Zones (AZs) where subnets will be created. Ignored when `availability_zone_ids` is set.<br>Can be the full name, e.g. `us-east-1a`, or just the part after the region, e.g. `a` to allow reusable values across regions.<br>The order of zones in the list must be stable or else Terraform will continually make changes.<br>If no AZs are specified, then `max_subnet_count` AZs will be selected in alphabetical order.<br>If `max_subnet_count > 0` and `length(var.availability_zones) > max_subnet_count`, the list<br>will be truncated. We recommend setting `availability_zones` and `max_subnet_count` explicitly as constant<br>(not computed) values for predictability, consistency, and stability.	`list(string)`	`[]`	no
<a name="input_context"></a> 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_delimiter"></a> 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	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	Set to false to prevent the module from creating any resources	`bool`	`null`	no
<a name="input_environment"></a> 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_gateway_vpc_endpoints"></a> gateway_vpc_endpoints	A list of Gateway VPC Endpoints to provision into the VPC. Only valid values are "dynamodb" and "s3".	`set(string)`	`[]`	no
<a name="input_id_length_limit"></a> 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_interface_vpc_endpoints"></a> interface_vpc_endpoints	A list of Interface VPC Endpoints to provision into the VPC.	`set(string)`	`[]`	no
<a name="input_ipv4_additional_cidr_block_associations"></a> ipv4_additional_cidr_block_associations	IPv4 CIDR blocks to assign to the VPC.<br>`ipv4_cidr_block` can be set explicitly, or set to `null` with the CIDR block derived from `ipv4_ipam_pool_id` using `ipv4_netmask_length`.<br>Map keys must be known at `plan` time, and are only used to track changes.	<pre>map(object({<br> ipv4_cidr_block = string<br> ipv4_ipam_pool_id = string<br> ipv4_netmask_length = number<br> }))</pre>	`{}`	no
<a name="input_ipv4_cidr_block_association_timeouts"></a> ipv4_cidr_block_association_timeouts	Timeouts (in `go` duration format) for creating and destroying IPv4 CIDR block associations	<pre>object({<br> create = string<br> delete = string<br> })</pre>	`null`	no
<a name="input_ipv4_cidrs"></a> ipv4_cidrs	Lists of CIDRs to assign to subnets. Order of CIDRs in the lists must not change over time.<br>Lists may contain more CIDRs than needed.	<pre>list(object({<br> private = list(string)<br> public = list(string)<br> }))</pre>	`[]`	no
<a name="input_ipv4_primary_cidr_block"></a> ipv4_primary_cidr_block	The primary IPv4 CIDR block for the VPC.<br>Either `ipv4_primary_cidr_block` or `ipv4_primary_cidr_block_association` must be set, but not both.	`string`	`null`	no
<a name="input_ipv4_primary_cidr_block_association"></a> ipv4_primary_cidr_block_association	Configuration of the VPC's primary IPv4 CIDR block via IPAM. Conflicts with `ipv4_primary_cidr_block`.<br>One of `ipv4_primary_cidr_block` or `ipv4_primary_cidr_block_association` must be set.<br>Additional CIDR blocks can be set via `ipv4_additional_cidr_block_associations`.	<pre>object({<br> ipv4_ipam_pool_id = string<br> ipv4_netmask_length = number<br> })</pre>	`null`	no
<a name="input_label_key_case"></a> 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	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	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	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_map_public_ip_on_launch"></a> map_public_ip_on_launch	Instances launched into a public subnet should be assigned a public IP address	`bool`	`true`	no
<a name="input_max_nats"></a> max_nats	Upper limit on number of NAT Gateways/Instances to create.<br>Set to 1 or 2 for cost savings at the expense of availability.<br>Default creates a NAT Gateway in each public subnet.	`number`	`null`	no
<a name="input_max_subnet_count"></a> max_subnet_count	Sets the maximum amount of subnets to deploy. 0 will deploy a subnet for every provided availability zone (in `region_availability_zones` variable) within the region	`number`	`0`	no
<a name="input_name"></a> 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	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_nat_eip_aws_shield_protection_enabled"></a> nat_eip_aws_shield_protection_enabled	Enable or disable AWS Shield Advanced protection for NAT EIPs. If set to 'true', a subscription to AWS Shield Advanced must exist in this account.	`bool`	`false`	no
<a name="input_nat_gateway_enabled"></a> nat_gateway_enabled	Flag to enable/disable NAT gateways	`bool`	`true`	no
<a name="input_nat_instance_ami_id"></a> nat_instance_ami_id	A list optionally containing the ID of the AMI to use for the NAT instance.<br>If the list is empty (the default), the latest official AWS NAT instance AMI<br>will be used. NOTE: The Official NAT instance AMI is being phased out and<br>does not support NAT64. Use of a NAT gateway is recommended instead.	`list(string)`	`[]`	no
<a name="input_nat_instance_enabled"></a> nat_instance_enabled	Flag to enable/disable NAT instances	`bool`	`false`	no
<a name="input_nat_instance_type"></a> nat_instance_type	NAT Instance type	`string`	`"t3.micro"`	no
<a name="input_public_subnets_enabled"></a> public_subnets_enabled	If false, do not create public subnets.<br>Since NAT gateways and instances must be created in public subnets, these will also not be created when `false`.	`bool`	`true`	no
<a name="input_regex_replace_chars"></a> 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_region"></a> region	AWS Region	`string`	n/a	yes
<a name="input_stage"></a> stage	ID element. Usually used to indicate role, e.g. 'prod', 'staging', 'source', 'build', 'test', 'deploy', 'release'	`string`	`null`	no
<a name="input_subnet_type_tag_key"></a> subnet_type_tag_key	Key for subnet type tag to provide information about the type of subnets, e.g. `cpco/subnet/type=private` or `cpcp/subnet/type=public`	`string`	n/a	yes
<a name="input_subnets_per_az_count"></a> subnets_per_az_count	The number of subnet of each type (public or private) to provision per Availability Zone.	`number`	`1`	no
<a name="input_subnets_per_az_names"></a> subnets_per_az_names	The subnet names of each type (public or private) to provision per Availability Zone.<br>This variable is optional.<br>If a list of names is provided, the list items will be used as keys in the outputs `named_private_subnets_map`, `named_public_subnets_map`,<br>`named_private_route_table_ids_map` and `named_public_route_table_ids_map`	`list(string)`	<pre>[<br> "common"<br>]</pre>	no
<a name="input_tags"></a> 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	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_vpc_flow_logs_bucket_environment_name"></a> vpc_flow_logs_bucket_environment_name	The name of the environment where the VPC Flow Logs bucket is provisioned	`string`	`""`	no
<a name="input_vpc_flow_logs_bucket_stage_name"></a> vpc_flow_logs_bucket_stage_name	The stage (account) name where the VPC Flow Logs bucket is provisioned	`string`	`""`	no
<a name="input_vpc_flow_logs_bucket_tenant_name"></a> vpc_flow_logs_bucket_tenant_name	The name of the tenant where the VPC Flow Logs bucket is provisioned.<br><br>If the `tenant` label is not used, leave this as `null`.	`string`	`null`	no
<a name="input_vpc_flow_logs_enabled"></a> vpc_flow_logs_enabled	Enable or disable the VPC Flow Logs	`bool`	`true`	no
<a name="input_vpc_flow_logs_log_destination_type"></a> vpc_flow_logs_log_destination_type	The type of the logging destination. Valid values: `cloud-watch-logs`, `s3`	`string`	`"s3"`	no
<a name="input_vpc_flow_logs_traffic_type"></a> vpc_flow_logs_traffic_type	The type of traffic to capture. Valid values: `ACCEPT`, `REJECT`, `ALL`	`string`	`"ALL"`	no

Outputs

Name	Description
<a name="output_availability_zones"></a> availability_zones	List of Availability Zones where subnets were created
<a name="output_az_private_subnets_map"></a> az_private_subnets_map	Map of AZ names to list of private subnet IDs in the AZs
<a name="output_az_public_subnets_map"></a> az_public_subnets_map	Map of AZ names to list of public subnet IDs in the AZs
<a name="output_interface_vpc_endpoints"></a> interface_vpc_endpoints	List of Interface VPC Endpoints in this VPC.
<a name="output_max_subnet_count"></a> max_subnet_count	Maximum allowed number of subnets before all subnet CIDRs need to be recomputed
<a name="output_nat_eip_protections"></a> nat_eip_protections	List of AWS Shield Advanced Protections for NAT Elastic IPs.
<a name="output_nat_gateway_ids"></a> nat_gateway_ids	NAT Gateway IDs
<a name="output_nat_gateway_public_ips"></a> nat_gateway_public_ips	NAT Gateway public IPs
<a name="output_nat_instance_ids"></a> nat_instance_ids	NAT Instance IDs
<a name="output_private_route_table_ids"></a> private_route_table_ids	Private subnet route table IDs
<a name="output_private_subnet_cidrs"></a> private_subnet_cidrs	Private subnet CIDRs
<a name="output_private_subnet_ids"></a> private_subnet_ids	Private subnet IDs
<a name="output_public_route_table_ids"></a> public_route_table_ids	Public subnet route table IDs
<a name="output_public_subnet_cidrs"></a> public_subnet_cidrs	Public subnet CIDRs
<a name="output_public_subnet_ids"></a> public_subnet_ids	Public subnet IDs
<a name="output_route_tables"></a> route_tables	Route tables info map
<a name="output_subnets"></a> subnets	Subnets info map
<a name="output_vpc"></a> vpc	VPC info map
<a name="output_vpc_cidr"></a> vpc_cidr	VPC CIDR
<a name="output_vpc_default_network_acl_id"></a> vpc_default_network_acl_id	The ID of the network ACL created by default on VPC creation
<a name="output_vpc_default_security_group_id"></a> vpc_default_security_group_id	The ID of the security group created by default on VPC creation
<a name="output_vpc_id"></a> vpc_id	VPC ID

References

cloudposse/terraform-aws-components - Cloud Posse's upstream component

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Related Projects

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Cloud Posse Terraform Modules - Our collection of reusable Terraform modules used by our reference architectures.
Atmos - Atmos is like docker-compose but for your infrastructure

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