allow task defs to be used for fargate

main.tf

@@ -135,6 +135,11 @@ resource "aws_ecs_task_definition" "ecs_task_definition" {
   ipc_mode              = var.ipc_mode
   network_mode          = var.network_mode
   pid_mode              = var.pid_mode
+
+  # Fargate requires cpu and memory to be defined at the task level
+  cpu                   = var.cpu == 0 ? "null" : var.cpu
+  memory                = var.memory == 0 ? "null" : var.memory
+
   dynamic "placement_constraints" {
     for_each = var.placement_constraints
     content {

variables.tf

@@ -95,7 +95,7 @@ variable "interactive" {
 }
 
 variable "ipc_mode" {
-  default     = "host"
+  default     = null
   description = "The IPC resource namespace to use for the containers in the task"
 }
 
@@ -144,7 +144,7 @@ variable "network_mode" {
 }
 
 variable "pid_mode" {
-  default     = "host"
+  default     = null
   description = "The process namespace to use for the containers in the task"
 }