r/aws-lb: Add support for IPv6-only ALB

.changelog/37700.txt

@@ -0,0 +1,3 @@
+```release-note:enhancement
+resource/aws_lb: Add support for IPv6-only Application Load Balancers
+```

internal/service/elbv2/load_balancer_test.go

@@ -1028,6 +1028,13 @@ func TestAccELBV2LoadBalancer_updateIPAddressType(t *testing.T) {
  resource.TestCheckResourceAttr(resourceName, names.AttrIPAddressType, "dualstack"),
  ),
  },
+ {
+ Config: testAccLoadBalancerConfig_ipAddressType(rName, "dualstack-without-public-ipv4"),
+ Check: resource.ComposeAggregateTestCheckFunc(
+ testAccCheckLoadBalancerExists(ctx, resourceName, &post),
+ resource.TestCheckResourceAttr(resourceName, names.AttrIPAddressType, "dualstack-without-public-ipv4"),
+ ),
+ },
  },
  })
 }

website/docs/r/lb.html.markdown

@@ -117,7 +117,7 @@ This resource supports the following arguments:
 * `enforce_security_group_inbound_rules_on_private_link_traffic` - (Optional) Whether inbound security group rules are enforced for traffic originating from a PrivateLink. Only valid for Load Balancers of type `network`. The possible values are `on` and `off`.
 * `idle_timeout` - (Optional) Time in seconds that the connection is allowed to be idle. Only valid for Load Balancers of type `application`. Default: 60.
 * `internal` - (Optional) If true, the LB will be internal. Defaults to `false`.
-* `ip_address_type` - (Optional) Type of IP addresses used by the subnets for your load balancer. The possible values are `ipv4` and `dualstack`.
+* `ip_address_type` - (Optional) Type of IP addresses used by the subnets for your load balancer. The possible values depend upon the load balancer type: `ipv4` (all load balancer types), `dualstack` (all load balancer types), and `dualstack-without-public-ipv4` (type `application` only).
 * `load_balancer_type` - (Optional) Type of load balancer to create. Possible values are `application`, `gateway`, or `network`. The default value is `application`.
 * `name` - (Optional) Name of the LB. This name must be unique within your AWS account, can have a maximum of 32 characters, must contain only alphanumeric characters or hyphens, and must not begin or end with a hyphen. If not specified, Terraform will autogenerate a name beginning with `tf-lb`.
 * `name_prefix` - (Optional) Creates a unique name beginning with the specified prefix. Conflicts with `name`.