Skip to content

Data Source: aws_vpc#

aws_vpc provides details about a specific VPC.

This resource can prove useful when a module accepts a vpc id as an input variable and needs to, for example, determine the CIDR block of that VPC.

Example Usage#

The following example shows how one might accept a VPC id as a variable and use this data source to obtain the data necessary to create a subnet within it.

variable "vpc_id" {}

data "aws_vpc" "selected" {
  id = var.vpc_id
}

resource "aws_subnet" "example" {
  vpc_id            = data.aws_vpc.selected.id
  availability_zone = "ru-msk-vol52"
  cidr_block        = cidrsubnet(data.aws_vpc.selected.cidr_block, 4, 1)
}

Argument Reference#

The arguments of this data source act as filters for querying the available VPCs in the current region. The given filters must match exactly one VPC whose data will be exported as attributes.

  • cidr_block - (Optional) The cidr block of the desired VPC.
  • dhcp_options_id - (Optional) The DHCP options id of the desired VPC.
  • filter - (Optional) Custom filter block as described below.
  • id - (Optional) The id of the specific VPC to retrieve.
  • state - (Optional) The current state of the desired VPC. Can be either "pending" or "available".
  • tags - (Optional) A map of tags, each pair of which must exactly match a pair on the desired VPC.

More complex filters can be expressed using one or more filter sub-blocks, which take the following arguments:

  • name - (Required) The name of the field to filter by it.
  • values - (Required) Set of values that are accepted for the given field. A VPC will be selected if any one of the given values matches.

For more information about filtering, see the EC2 API documentation.

Attributes Reference#

Supported attributes#

All argument attributes except filter blocks are also exported as result attributes. This data source will complete the data by populating any fields that are not included in the configuration with the data for the selected VPC.

The following attributes are additionally exported:

  • arn - Amazon Resource Name (ARN) of VPC.
  • enable_dns_support - Whether the VPC has DNS support.
  • main_route_table_id - ID of the main route table associated with this VPC.

cidr_block_associations is also exported with the following attributes:

  • association_id - The association ID for the IPv4 CIDR block.
  • cidr_block - The CIDR block for the association.
  • state - The State of the association.

Unsupported attributes#

~> Note These attributes may be present in the terraform.tfstate file but they have preset values and cannot be specified in configuration files.

The following attributes are not currently supported:

enable_dns_hostnames, instance_tenancy, ipv6_association_id, ipv6_cidr_block, owner_id.