diff --git a/modules/instance_template/main.tf b/modules/instance_template/main.tf
index 189fa170..2c2ce75d 100644
--- a/modules/instance_template/main.tf
+++ b/modules/instance_template/main.tf
@@ -71,13 +71,13 @@ resource "google_compute_instance_template" "tpl" {
       boot         = lookup(disk.value, "boot", null)
       device_name  = lookup(disk.value, "device_name", null)
       disk_name    = lookup(disk.value, "disk_name", null)
-      disk_size_gb = lookup(disk.value, "disk_size_gb", null)
+      disk_size_gb = lookup(disk.value, "disk_size_gb", lookup(disk.value, "disk_type", null) == "local-ssd" ? "375" : null)
       disk_type    = lookup(disk.value, "disk_type", null)
-      interface    = lookup(disk.value, "interface", null)
+      interface    = lookup(disk.value, "interface", lookup(disk.value, "disk_type", null) == "local-ssd" ? "NVME" : null)
       mode         = lookup(disk.value, "mode", null)
       source       = lookup(disk.value, "source", null)
       source_image = lookup(disk.value, "source_image", null)
-      type         = lookup(disk.value, "type", null)
+      type         = lookup(disk.value, "disk_type", null) == "local-ssd" ? "SCRATCH" : "PERSISTENT"
 
       dynamic "disk_encryption_key" {
         for_each = lookup(disk.value, "disk_encryption_key", [])