diff --git a/aws/ig/main.tf b/aws/ig/main.tf
index 13ea4ab..d09bc76 100644
--- a/aws/ig/main.tf
+++ b/aws/ig/main.tf
@@ -26,6 +26,11 @@ locals {
       taints                 = length(var.taints) > 0 ? var.taints : null
       subnets                = var.subnets
       hooks                  = length(var.hooks) > 0 ? var.hooks : null
+      warmPool = var.warm-pool != null ? {
+        minSize             = var.warm-pool.min-size
+        maxSize             = var.warm-pool.max-size
+        enableLifecycleHook = var.warm-pool.enable-lifecycle-hook
+      } : null
       rollingUpdate = {
         maxSurge       = var.rolling-update.max-surge
         maxUnavailable = var.rolling-update.max-unavailable
diff --git a/aws/ig/variables.tf b/aws/ig/variables.tf
index f27b4f8..dd32d7e 100644
--- a/aws/ig/variables.tf
+++ b/aws/ig/variables.tf
@@ -112,7 +112,7 @@ variable "max-price" {
   type        = string
   description = "If set, this group will use spot instances with the specified max-price"
 
-  default = ""
+  nullable = true
 }
 
 variable "hooks" {
@@ -177,3 +177,14 @@ variable "rolling-update" {
     max-unavailable = 0
   }
 }
+
+variable "warm-pool" {
+  type = object({
+    min-size              = number
+    max-size              = number
+    enable-lifecycle-hook = bool
+  })
+  description = "AWS WarmPool to get pre-initialized EC2 instances."
+
+  nullable = true
+}