d/aws_eip: Add ipam_pool_id attribute.

.changelog/39604.txt

@@ -1,3 +1,7 @@
 ```release-note:enhancement
 resource/aws_eip: Add `ipam_pool_id` argument in support of [public IPAM pools](https://docs.aws.amazon.com/vpc/latest/ipam/tutorials-eip-pool.html)
+```
+
+```release-note:enhancement
+data-source/aws_eip: Add `ipam_pool_id` attribute
 ```

internal/service/ec2/ec2_eip_data_source.go

@@ -5,6 +5,7 @@ package ec2
 
 import (
 	"context"
+	"strings"
 	"time"
 
 	"github.com/aws/aws-sdk-go-v2/aws"
@@ -65,6 +66,10 @@ func dataSourceEIP() *schema.Resource {
 				Type:     schema.TypeString,
 				Computed: true,
 			},
+			"ipam_pool_id": {
+				Type:     schema.TypeString,
+				Computed: true,
+			},
 			names.AttrNetworkInterfaceID: {
 				Type:     schema.TypeString,
 				Computed: true,
@@ -162,6 +167,9 @@ func dataSourceEIPRead(ctx context.Context, d *schema.ResourceData, meta interfa
 	d.Set("customer_owned_ipv4_pool", eip.CustomerOwnedIpv4Pool)
 	d.Set(names.AttrDomain, eip.Domain)
 	d.Set(names.AttrInstanceID, eip.InstanceId)
+	if v := aws.ToString(eip.PublicIpv4Pool); strings.HasPrefix(v, publicIPv4PoolIDIPAMPoolPrefix) {
+		d.Set("ipam_pool_id", v)
+	}
 	d.Set(names.AttrNetworkInterfaceID, eip.NetworkInterfaceId)
 	d.Set("network_interface_owner_id", eip.NetworkInterfaceOwnerId)
 	d.Set("public_ipv4_pool", eip.PublicIpv4Pool)

internal/service/ec2/ec2_eip_data_source_test.go

@@ -74,10 +74,11 @@ func TestAccEC2EIPDataSource_publicIP(t *testing.T) {
 			{
 				Config: testAccEIPDataSourceConfig_publicIP(rName),
 				Check: resource.ComposeTestCheckFunc(
+					resource.TestCheckResourceAttrPair(dataSourceName, names.AttrDomain, resourceName, names.AttrDomain),
 					resource.TestCheckResourceAttrPair(dataSourceName, names.AttrID, resourceName, names.AttrID),
+					resource.TestCheckResourceAttrPair(dataSourceName, "ipam_pool_id", resourceName, "ipam_pool_id"),
 					resource.TestCheckResourceAttrPair(dataSourceName, "public_dns", resourceName, "public_dns"),
 					resource.TestCheckResourceAttrPair(dataSourceName, "public_ip", resourceName, "public_ip"),
-					resource.TestCheckResourceAttrPair(dataSourceName, names.AttrDomain, resourceName, names.AttrDomain),
 				),
 			},
 		},

website/docs/d/eip.html.markdown

@@ -71,6 +71,7 @@ This data source exports the following attributes in addition to the arguments a
 * `domain` - Whether the address is for use in EC2-Classic (standard) or in a VPC (vpc).
 * `id` - If VPC Elastic IP, the allocation identifier. If EC2-Classic Elastic IP, the public IP address.
 * `instance_id` - ID of the instance that the address is associated with (if any).
+* `ipam_pool_id`- The ID of an IPAM pool which has an Amazon-provided or BYOIP public IPv4 CIDR provisioned to it.
 * `network_interface_id` - The ID of the network interface.
 * `network_interface_owner_id` - The ID of the AWS account that owns the network interface.
 * `private_ip` - Private IP address associated with the Elastic IP address.