Suppress diffs when an empty set is specified for aws_autoscaling_group.availability_zones

aws/diff_suppress_funcs.go

@@ -75,3 +75,13 @@ func suppressOpenIdURL(k, old, new string, d *schema.ResourceData) bool {
 
  return oldUrl.String() == newUrl.String()
 }
+
+func suppressAutoscalingGroupAvailabilityZoneDiffs(k, old, new string, d *schema.ResourceData) bool {
+ // If VPC zone identifiers are provided then there is no need to explicitly
+ // specify availability zones.
+ if _, ok := d.GetOk("vpc_zone_identifier"); ok {
+ return true
+ }
+
+ return false
+}

aws/resource_aws_autoscaling_group.go

@@ -113,11 +113,12 @@ func resourceAwsAutoscalingGroup() *schema.Resource {
  },
 
  "availability_zones": {
- Type: schema.TypeSet,
- Optional: true,
- Computed: true,
- Elem: &schema.Schema{Type: schema.TypeString},
- Set: schema.HashString,
+ Type: schema.TypeSet,
+ Optional: true,
+ Computed: true,
+ Elem: &schema.Schema{Type: schema.TypeString},
+ Set: schema.HashString,
+ DiffSuppressFunc: suppressAutoscalingGroupAvailabilityZoneDiffs,
  },
 
  "placement_group": {

aws/resource_aws_autoscaling_group_test.go

@@ -857,6 +857,26 @@ func TestAccAWSAutoScalingGroup_classicVpcZoneIdentifier(t *testing.T) {
  })
 }
 
+func TestAccAWSAutoScalingGroup_emptyAvailabilityZones(t *testing.T) {
+ var group autoscaling.Group
+
+ resource.Test(t, resource.TestCase{
+ PreCheck: func() { testAccPreCheck(t) },
+ IDRefreshName: "aws_autoscaling_group.test",
+ Providers: testAccProviders,
+ CheckDestroy: testAccCheckAWSAutoScalingGroupDestroy,
+ Steps: []resource.TestStep{
+ resource.TestStep{
+ Config: testAccAWSAutoScalingGroupConfig_emptyAvailabilityZones,
+ Check: resource.ComposeTestCheckFunc(
+ testAccCheckAWSAutoScalingGroupExists("aws_autoscaling_group.test", &group),
+ resource.TestCheckResourceAttr("aws_autoscaling_group.test", "availability_zones.#", "1"),
+ ),
+ },
+ },
+ })
+}
+
 const testAccAWSAutoScalingGroupConfig_autoGeneratedName = `
 resource "aws_launch_configuration" "foobar" {
  image_id = "ami-21f78e11"
@@ -1826,3 +1846,28 @@ resource "aws_launch_configuration" "test" {
  instance_type = "t1.micro"
 }
 `
+
+const testAccAWSAutoScalingGroupConfig_emptyAvailabilityZones = `
+resource "aws_vpc" "test" {
+ cidr_block = "10.0.0.0/16"
+}
+
+resource "aws_subnet" "test" {
+ vpc_id = "${aws_vpc.test.id}"
+ cidr_block = "10.0.0.0/16"
+}
+
+resource "aws_autoscaling_group" "test" {
+ min_size = 0
+ max_size = 0
+
+ availability_zones = []
+ launch_configuration = "${aws_launch_configuration.test.name}"
+ vpc_zone_identifier = ["${aws_subnet.test.id}"]
+}
+
+resource "aws_launch_configuration" "test" {
+ image_id = "ami-21f78e11"
+ instance_type = "t1.micro"
+}
+`