disable autohealing by default

main.tf

@@ -67,6 +67,7 @@ module "nat-gateway" {
   wait_for_instances = true
   metadata           = "${var.metadata}"
   ssh_source_ranges  = "${var.ssh_source_ranges}"
+  http_health_check  = "${var.autohealing_enabled}"
 
   update_strategy    = "ROLLING_UPDATE"
 

variables.tf

@@ -112,6 +112,11 @@ variable instance_labels {
   default     = {}
 }
 
+variable autohealing_enabled {
+  description = "Enable instance autohealing using http health check"
+  default     = false
+}
+
 variable region_params {
   description = "Map of default zones and IPs for each region. Can be overridden using the `zone` and `ip` variables."
   type        = "map"
@@ -190,4 +195,4 @@ variable region_params {
 variable "dest_range" {
   description = "The destination IPv4 address range that this route applies to"
   default     = "0.0.0.0/0"
-}
+}