handling updates

builtin/providers/aws/resource_aws_autoscaling_group.go

@@ -231,6 +231,7 @@ func resourceAwsAutoscalingGroupRead(d *schema.ResourceData, meta interface{}) e
 	d.Set("load_balancers", g.LoadBalancerNames)
 	d.Set("min_size", g.MinSize)
 	d.Set("max_size", g.MaxSize)
+	d.Set("placement_group", g.PlacementGroup)
 	d.Set("name", g.AutoScalingGroupName)
 	d.Set("tag", g.Tags)
 	d.Set("vpc_zone_identifier", strings.Split(*g.VPCZoneIdentifier, ","))
@@ -285,6 +286,10 @@ func resourceAwsAutoscalingGroupUpdate(d *schema.ResourceData, meta interface{})
 		}
 	}
 
+	if d.HasChange("placement_group") {
+		opts.PlacementGroup = aws.String(d.Get("placement_group").(string))
+	}
+
 	if d.HasChange("termination_policies") {
 		// If the termination policy is set to null, we need to explicitly set
 		// it back to "Default", or the API won't reset it for us.