data "aws_iam_policy_document" "assume_role_policy" {

  statement {
    actions = ["sts:AssumeRole"]

    principals {
      identifiers = ["ecs-tasks.amazonaws.com"]
      type = "Service"
    }
  }
}

resource "aws_batch_job_definition" "test" {
  container_properties = jsonencode({
 command = ["echo", "test"]
 image = "busybox"
 jobRoleArn = "arn:aws:iam::123456789012:role/AWSBatchS3ReadOnly"

 fargatePlatformConfiguration = {
 platformVersion = "LATEST"
 }

 resourceRequirements = [
 {
 type = "VCPU"
 value = "0.25"
 },
 {
 type = "MEMORY"
 value = "512"
 }
 ]

 executionRoleArn = aws_iam_role.ecs_task_execution_role.arn
 })
  name = "tf_test_batch_job_definition"
  platform_capabilities = ["FARGATE"]
  type = "container"
}

resource "aws_iam_role" "ecs_task_execution_role" {
  assume_role_policy = data.aws_iam_policy_document.assume_role_policy.json
  name = "tf_test_batch_exec_role"
}

resource "aws_iam_role_policy_attachment" "ecs_task_execution_role_policy" {
  policy_arn = "arn:aws:iam::aws:policy/service-role/AmazonECSTaskExecutionRolePolicy"
  role = aws_iam_role.ecs_task_execution_role.name
}