provider/aws: aws_vpc data source
This commit is contained in:
Martin Atkins
parent
82f958cc17
commit
aa0b6019f8
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package aws
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import (
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"fmt"
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"log"
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"github.com/aws/aws-sdk-go/aws"
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"github.com/aws/aws-sdk-go/service/ec2"
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"github.com/hashicorp/terraform/helper/schema"
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)
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func dataSourceAwsVpc() *schema.Resource {
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return &schema.Resource{
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Read: dataSourceAwsVpcRead,
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Schema: map[string]*schema.Schema{
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"cidr_block": &schema.Schema{
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Type: schema.TypeString,
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Optional: true,
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Computed: true,
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},
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"dhcp_options_id": &schema.Schema{
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Type: schema.TypeString,
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Optional: true,
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Computed: true,
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},
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"default": &schema.Schema{
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Type: schema.TypeBool,
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Optional: true,
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Computed: true,
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},
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"filter": ec2CustomFiltersSchema(),
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"id": &schema.Schema{
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Type: schema.TypeString,
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Optional: true,
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Computed: true,
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},
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"instance_tenancy": &schema.Schema{
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Type: schema.TypeString,
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Computed: true,
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},
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"state": &schema.Schema{
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Type: schema.TypeString,
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Optional: true,
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Computed: true,
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},
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"tags": tagsSchemaComputed(),
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},
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}
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}
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func dataSourceAwsVpcRead(d *schema.ResourceData, meta interface{}) error {
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conn := meta.(*AWSClient).ec2conn
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req := &ec2.DescribeVpcsInput{}
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if id := d.Get("id"); id != "" {
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req.VpcIds = []*string{aws.String(id.(string))}
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}
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// We specify "default" as boolean, but EC2 filters want
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// it to be serialized as a string. Note that setting it to
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// "false" here does not actually filter by it *not* being
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// the default, because Terraform can't distinguish between
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// "false" and "not set".
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isDefaultStr := ""
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if d.Get("default").(bool) {
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isDefaultStr = "true"
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}
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req.Filters = buildEC2AttributeFilterList(
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map[string]string{
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"cidr": d.Get("cidr_block").(string),
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"dhcp-options-id": d.Get("dhcp_options_id").(string),
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"isDefault": isDefaultStr,
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"state": d.Get("state").(string),
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},
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)
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req.Filters = append(req.Filters, buildEC2TagFilterList(
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tagsFromMap(d.Get("tags").(map[string]interface{})),
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)...)
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req.Filters = append(req.Filters, buildEC2CustomFilterList(
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d.Get("filter").(*schema.Set),
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)...)
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if len(req.Filters) == 0 {
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// Don't send an empty filters list; the EC2 API won't accept it.
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req.Filters = nil
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}
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log.Printf("[DEBUG] DescribeVpcs %s\n", req)
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resp, err := conn.DescribeVpcs(req)
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if err != nil {
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return err
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}
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if resp == nil || len(resp.Vpcs) == 0 {
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return fmt.Errorf("no matching VPC found")
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}
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if len(resp.Vpcs) > 1 {
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return fmt.Errorf("multiple VPCs matched; use additional constraints to reduce matches to a single VPC")
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}
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vpc := resp.Vpcs[0]
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d.SetId(*vpc.VpcId)
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d.Set("id", vpc.VpcId)
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d.Set("cidr_block", vpc.CidrBlock)
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d.Set("dhcp_options_id", vpc.DhcpOptionsId)
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d.Set("instance_tenancy", vpc.InstanceTenancy)
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d.Set("default", vpc.IsDefault)
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d.Set("state", vpc.State)
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d.Set("tags", tagsToMap(vpc.Tags))
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return nil
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}
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@ -0,0 +1,95 @@
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package aws
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import (
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"fmt"
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"testing"
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"github.com/hashicorp/terraform/helper/resource"
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"github.com/hashicorp/terraform/terraform"
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)
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func TestAccDataSourceAwsVpc(t *testing.T) {
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resource.Test(t, resource.TestCase{
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PreCheck: func() { testAccPreCheck(t) },
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Providers: testAccProviders,
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Steps: []resource.TestStep{
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resource.TestStep{
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Config: testAccDataSourceAwsVpcConfig,
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Check: resource.ComposeTestCheckFunc(
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testAccDataSourceAwsVpcCheck("data.aws_vpc.by_id"),
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testAccDataSourceAwsVpcCheck("data.aws_vpc.by_cidr"),
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testAccDataSourceAwsVpcCheck("data.aws_vpc.by_tag"),
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testAccDataSourceAwsVpcCheck("data.aws_vpc.by_filter"),
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),
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},
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},
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})
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}
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func testAccDataSourceAwsVpcCheck(name string) resource.TestCheckFunc {
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return func(s *terraform.State) error {
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rs, ok := s.RootModule().Resources[name]
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if !ok {
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return fmt.Errorf("root module has no resource called %s", name)
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}
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vpcRs, ok := s.RootModule().Resources["aws_vpc.test"]
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if !ok {
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return fmt.Errorf("can't find aws_vpc.test in state")
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}
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attr := rs.Primary.Attributes
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if attr["id"] != vpcRs.Primary.Attributes["id"] {
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return fmt.Errorf(
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"id is %s; want %s",
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attr["id"],
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vpcRs.Primary.Attributes["id"],
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)
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}
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if attr["cidr_block"] != "172.16.0.0/16" {
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return fmt.Errorf("bad cidr_block %s", attr["cidr_block"])
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}
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if attr["tags.Name"] != "terraform-testacc-vpc-data-source" {
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return fmt.Errorf("bad Name tag %s", attr["tags.Name"])
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}
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return nil
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}
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}
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const testAccDataSourceAwsVpcConfig = `
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provider "aws" {
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region = "us-west-2"
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}
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resource "aws_vpc" "test" {
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cidr_block = "172.16.0.0/16"
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tags {
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Name = "terraform-testacc-vpc-data-source"
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}
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}
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data "aws_vpc" "by_id" {
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id = "${aws_vpc.test.id}"
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}
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data "aws_vpc" "by_cidr" {
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cidr_block = "${aws_vpc.test.cidr_block}"
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}
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data "aws_vpc" "by_tag" {
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tags {
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Name = "${aws_vpc.test.tags["Name"]}"
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}
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}
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data "aws_vpc" "by_filter" {
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filter {
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name = "cidr"
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values = ["${aws_vpc.test.cidr_block}"]
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}
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}
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`
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@ -154,6 +154,7 @@ func Provider() terraform.ResourceProvider {
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"aws_redshift_service_account": dataSourceAwsRedshiftServiceAccount(),
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"aws_s3_bucket_object": dataSourceAwsS3BucketObject(),
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"aws_subnet": dataSourceAwsSubnet(),
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"aws_vpc": dataSourceAwsVpc(),
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},
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ResourcesMap: map[string]*schema.Resource{
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@ -0,0 +1,79 @@
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---
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layout: "aws"
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page_title: "AWS: aws_vpc"
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sidebar_current: "docs-aws-datasource-vpc"
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description: |-
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Provides details about a specific VPC
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---
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# aws\_vpc
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`aws_vpc` provides details about a specific VPC.
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This resource can prove useful when a module accepts a vpc id as
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an input variable and needs to, for example, determine the CIDR block of that
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VPC.
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## Example Usage
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The following example shows how one might accept a VPC id as a variable
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and use this data source to obtain the data necessary to create a subnet
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within it.
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```
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variable "vpc_id" {}
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data "aws_vpc" "selected" {
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id = "${var.vpc_id}"
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}
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resource "aws_subnet" "example" {
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vpc_id = "${aws_vpc.selected.id}"
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availability_zone = "us-west-2a"
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cidr_block = "${cidrsubnet(aws_vpc.selected.cidr_block, 4, 1)}"
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}
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```
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## Argument Reference
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The arguments of this data source act as filters for querying the available
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VPCs in the current region. The given filters must match exactly one
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VPC whose data will be exported as attributes.
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* `cidr_block` - (Optional) The cidr block of the desired VPC.
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* `dhcp_options_id` - (Optional) The DHCP options id of the desired VPC.
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* `default` - (Optional) Boolean constraint on whether the desired VPC is
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the default VPC for the region.
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* `filter` - (Optional) Custom filter block as described below.
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* `id` - (Optional) The id of the specific VPC to retrieve.
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* `state` - (Optional) The current state of the desired VPC.
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Can be either `"pending"` or `"available"`.
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* `tags` - (Optional) A mapping of tags, each pair of which must exactly match
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a pair on the desired VPC.
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More complex filters can be expressed using one or more `filter` sub-blocks,
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which take the following arguments:
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* `name` - (Required) The name of the field to filter by, as defined by
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[the underlying AWS API](http://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DescribeVpcs.html).
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* `values` - (Required) Set of values that are accepted for the given field.
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A VPC will be selected if any one of the given values matches.
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## Attributes Reference
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All of the argument attributes except `filter` blocks are also exported as
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result attributes. This data source will complete the data by populating
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any fields that are not included in the configuration with the data for
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the selected VPC.
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The following attribute is additionally exported:
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* `instance_tenancy` - The allowed tenancy of instances launched into the
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selected VPC. May be any of `"default"`, `"dedicated"`, or `"host"`.
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@ -47,6 +47,9 @@
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<li<%= sidebar_current("docs-aws-datasource-subnet") %>>
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<a href="/docs/providers/aws/d/subnet.html">aws_subnet</a>
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</li>
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<li<%= sidebar_current("docs-aws-datasource-vpc") %>>
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<a href="/docs/providers/aws/d/vpc.html">aws_vpc</a>
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</li>
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</ul>
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</li>
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