#terraform - February 2019

module "default_backend_web_app" {
  source    = "git::<https://github.com/cloudposse/terraform-aws-ecs-web-app.git?ref=tags/0.10.0>"
  namespace = "${local.application_name}"
  stage     = "default"
  name      = "${var.stage}"
  vpc_id    = "${module.stack.vpc_id}"

  container_image  = "nginx:latest"
  container_cpu    = "256"
  container_memory = "512"
  container_port   = "80"

  #launch_type                 = "FARGATE"
  listener_arns                 = "${module.alb.listener_arns}"
  listener_arns_count           = "1"
  aws_logs_region               = "${data.aws_region.current.name}"
  ecs_cluster_arn               = "${aws_ecs_cluster.this.arn}"
  ecs_cluster_name              = "${aws_ecs_cluster.this.name}"
  ecs_security_group_ids        = ["${module.stack.vpc_default_security_group_id}"]
  ecs_private_subnet_ids        = ["${module.stack.vpc_private_subnets}"]
  alb_ingress_healthcheck_path  = "/"
  alb_ingress_paths             = ["/*"]
  alb_ingress_listener_priority = 100

  codepipeline_enabled = "false"
  ecs_alarms_enabled   = "true"
  autoscaling_enabled  = "false"

  alb_name                                        = "${module.alb.alb_name}"
  alb_arn_suffix                                  = "${module.alb.alb_arn_suffix}"
  alb_target_group_alarms_enabled                 = "true"
  alb_target_group_alarms_3xx_threshold           = "25"
  alb_target_group_alarms_4xx_threshold           = "25"
  alb_target_group_alarms_5xx_threshold           = "25"
  alb_target_group_alarms_response_time_threshold = "0.5"
  alb_target_group_alarms_period                  = "300"
  alb_target_group_alarms_evaluation_periods      = "1"

  environment = [
    {
      name  = "PORT"
      value = "80"
    },
  ]
}

port_mappings = [{
    "containerPort" = "${var.atlantis_port}"
    "hostPort"      = "${var.atlantis_port}"
    "protocol"      = "tcp"
  }]

  port_mappings = [
    {
      "containerPort" = "80"
      "hostPort"      = "80"
      "protocol"      = "tcp"
    },
    {
      "containerPort" = "80"
      "hostPort"      = "443"
      "protocol"      = "tcp"
    }
  ]

name = "this"
stage = "that"

* module.vpc.aws_route_table.private: aws_route_table.private: value of 'count' cannot be computed
* module.vpc.aws_eip.public: aws_eip.public: value of 'count' cannot be computed
* module.vpc.aws_subnet.private: aws_subnet.private: value of 'count' cannot be computed
* module.vpc.aws_subnet.public: aws_subnet.public: value of 'count' cannot be computed

resource "aws_subnet" "public" {
  count                   = "${local.region-to-az-count-map[var.region]}"
  vpc_id                  = "${aws_vpc.default.id}"
  cidr_block              = "${cidrsubnet(local.public_subnet_block, ceil(log(local.region-to-az-count-map[var.region] * 2, 2)), count.index)}"
  availability_zone       = "${var.region}${local.num-to-az-letter-map[count.index]}"
  map_public_ip_on_launch = true

  tags = "${merge(
    var.public_subnet_tags,
    var.tags,
    map(
      "Name", "public-${var.name}-${var.region}${local.num-to-az-letter-map[count.index]}",
      "Environment", "${var.environment}",
      "AvailabilityZone", "${var.region}${local.num-to-az-letter-map[count.index]}"
    )
  )}"
}

locals {
  region-to-az-count-map = {
    "us-west-1" = 3
    "us-west-2" = 3
    "us-east-1" = 6
    "us-east-2" = 3
  }

  num-to-az-letter-map = {
    "0" = "a"
    "1" = "b"
    "2" = "c"
    "3" = "d"
    "4" = "e"
    "5" = "f"
  }
}

We expect that users will stick to 0.11 through at least the end of 2019.

Tons of issues have been closed or ignored, because of: This problem will be solved in Terraform 0.12.

* module.vpc_peer_database.data.aws_route_table.requestor: data.aws_route_table.requestor: value of 'count' cannot be computed

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Sid": "",
      "Effect": "Allow",
      "Principal": {
        "Service": "<http://ecs-tasks.amazonaws.com|ecs-tasks.amazonaws.com>"
      },
      "Action": "sts:AssumeRole"
    }
  ]
}

 terraform state show module.regatta_portal.module.alb_service_task_portalbackend.aws_ecs_task_definition.default
id                                  = hiab-qa2-regattaportal-bend
arn                                 = arn:aws:ecs:eu-west-1:594350645011:task-definition/hiab-qa2-regattaportal-bend:3
revision                            = 3

terraform state show module.regatta_portal.module.alb_service_task_portalbackend.aws_ecs_service.default
task_definition                                    = hiab-qa2-regattaportal-bend:2

lifecycle {
    ignore_changes = ["task_definition"]
}

export TF_VAR_amap='{ foo = "bar", baz = "qux" }'