klondike.diff

diff --git a/configure.yml b/configure.yml
index 3ee5669..7ade25e 100644
--- a/configure.yml
+++ b/configure.yml
@@ -1,4 +1,4 @@
-- hosts: 127.0.0.1
+- hosts: localhost
   connection: local
   gather_facts: False
   roles:
@@ -10,7 +10,7 @@
   vars_files:
   - "{{cluster_dir}}/main.yml"
 
-- hosts: 127.0.0.1
+- hosts: localhost
   connection: local
   gather_facts: False
   roles:
@@ -33,7 +33,7 @@
       - "api.{{ aws_hosted_zone }}"
       - "{{ cluster_service_kubernetes_ip }}"
 
-- hosts: 127.0.0.1
+- hosts: localhost
   connection: local
   gather_facts: False
   roles:
diff --git a/roles/configure/files/stack-template.json b/roles/configure/files/stack-template.json
index fd89ca6..458f24b 100644
--- a/roles/configure/files/stack-template.json
+++ b/roles/configure/files/stack-template.json
@@ -1350,7 +1350,9 @@
         "UserData": {
           "Ref": "WorkerUserData"
         },
-        "EbsOptimized": true,
+        "EbsOptimized": {
+          "Ref": "WorkerEbsOptimized"
+        },
         "BlockDeviceMappings": [
           {
             "DeviceName": "/dev/xvda",
@@ -3338,6 +3340,11 @@
       "Type": "Number",
       "Description": "Number of IOPs to provision for the Worker EC2 Instance root disk."
     },
+    "WorkerEbsOptimized": {
+      "Type": "String",
+      "Description": "Enable optimized EBS I/O",
+      "Default": "true"
+    },
     "HostedZone": {
       "Type": "String",
       "Description": "DNS zone hosted in Route 53 that will be used to provide DNS resolution for the Kubernetes API to external clients"
diff --git a/roles/configure/templates/create-stack.sh.j2 b/roles/configure/templates/create-stack.sh.j2
index b843c5d..cb10cae 100644
--- a/roles/configure/templates/create-stack.sh.j2
+++ b/roles/configure/templates/create-stack.sh.j2
@@ -28,6 +28,7 @@ PARAMETERS=(
 	"ParameterKey=WorkerInstanceCount,ParameterValue={{ worker_instance_count }}"
 	"ParameterKey=WorkerInstanceRootDiskSize,ParameterValue={{ worker_instance_root_disk_size_gb }}"
 	"ParameterKey=WorkerInstanceRootDiskIOPs,ParameterValue={{ worker_instance_root_disk_size_gb * 30 }}"
+	"ParameterKey=WorkerEbsOptimized,ParameterValue={{ worker_instance_ebs_optimized|default('true') }}"
 	"ParameterKey=BastionInstanceType,ParameterValue={{ bastion_instance_type }}"
 	"ParameterKey=BastionInstanceRootDiskSize,ParameterValue={{ bastion_instance_root_disk_size_gb }}"
 	"ParameterKey=AggregatorInstanceType,ParameterValue={{ aggregator_instance_type }}"