Updates to terraform 0.12 syntax

_outputs.tf

@@ -1,67 +1,67 @@
 output "alb_id" {
-  value = "${aws_lb.ecs.*.id}"
+  value = aws_lb.ecs.*.id
 }
 
 output "alb_arn" {
-  value = "${aws_lb.ecs.*.arn}"
+  value = aws_lb.ecs.*.arn
 }
 
 output "alb_dns_name" {
-  value = "${aws_lb.ecs.*.dns_name}"
+  value = aws_lb.ecs.*.dns_name
 }
 
 output "alb_zone_id" {
-  value = "${aws_lb.ecs.*.zone_id}"
+  value = aws_lb.ecs.*.zone_id
 }
 
 output "ecs_iam_role_arn" {
-  value = "${aws_iam_role.ecs.arn}"
+  value = aws_iam_role.ecs.arn
 }
 
 output "ecs_iam_role_name" {
-  value = "${aws_iam_role.ecs.name}"
+  value = aws_iam_role.ecs.name
 }
 
 output "ecs_service_iam_role_arn" {
-  value = "${aws_iam_role.ecs_service.arn}"
+  value = aws_iam_role.ecs_service.arn
 }
 
 output "ecs_service_iam_role_name" {
-  value = "${aws_iam_role.ecs_service.name}"
+  value = aws_iam_role.ecs_service.name
 }
 
 output "ecs_task_iam_role_arn" {
-  value = "${aws_iam_role.ecs_task.arn}"
+  value = aws_iam_role.ecs_task.arn
 }
 
 output "ecs_task_iam_role_name" {
-  value = "${aws_iam_role.ecs_task.name}"
+  value = aws_iam_role.ecs_task.name
 }
 
 output "ecs_id" {
-  value = "${aws_ecs_cluster.ecs.id}"
+  value = aws_ecs_cluster.ecs.id
 }
 
 output "ecs_arn" {
-  value = "${aws_ecs_cluster.ecs.arn}"
+  value = aws_ecs_cluster.ecs.arn
 }
 
 output "ecs_name" {
-  value = "${aws_ecs_cluster.ecs.name}"
+  value = aws_ecs_cluster.ecs.name
 }
 
 output "alb_listener_https_arn" {
-  value = "${aws_lb_listener.ecs_https.*.arn}"
+  value = aws_lb_listener.ecs_https.*.arn
 }
 
 output "ecs_nodes_secgrp_id" {
-  value = "${aws_security_group.ecs_nodes.id}"
+  value = aws_security_group.ecs_nodes.id
 }
 
 output "alb_secgrp_id" {
-  value = "${aws_security_group.alb.*.id}"
+  value = aws_security_group.alb.*.id
 }
 
 output "alb_cloudfront_key" {
-  value = "${random_string.alb_cloudfront_key.result}"
+  value = random_string.alb_cloudfront_key.result
 }

_variables.tf

@@ -31,17 +31,17 @@ variable "vpc_id" {
 }
 
 variable "private_subnet_ids" {
-  type        = "list"
+  type        = list(string)
   description = "List of private subnet IDs for ECS instances"
 }
 
 variable "public_subnet_ids" {
-  type        = "list"
+  type        = list(string)
   description = "List of public subnet IDs for ECS ALB"
 }
 
 variable "secure_subnet_ids" {
-  type        = "list"
+  type        = list(string)
   description = "List of secure subnet IDs for EFS"
 }
 
@@ -50,7 +50,7 @@ variable "certificate_arn" {}
 # == OPTIONAL VARS
 
 variable "security_group_ids" {
-  type        = "list"
+  type        = list(string)
   default     = []
   description = "Extra security groups for instances"
 }
@@ -97,7 +97,7 @@ variable "expire_backup_efs" {
 
 variable "target_group_arns" {
   default     = []
-  type        = "list"
+  type        = list(string)
   description = "List of target groups for ASG to register"
 }
 

alb.tf

@@ -1,5 +1,5 @@
 resource "aws_lb" "ecs" {
-  count = "${var.alb ? 1 : 0}"
+  count = var.alb ? 1 : 0
 
   load_balancer_type = "application"
   internal           = false
@@ -18,13 +18,13 @@ resource "aws_lb" "ecs" {
 }
 
 resource "aws_lb_listener" "ecs_https" {
-  count = "${var.alb ? 1 : 0}"
+  count = var.alb ? 1 : 0
 
   load_balancer_arn = aws_lb.ecs[0].arn
   port              = "443"
   protocol          = "HTTPS"
   ssl_policy        = "ELBSecurityPolicy-2016-08"
-  certificate_arn   = "${var.certificate_arn}"
+  certificate_arn   = var.certificate_arn
 
   default_action {
     type             = "forward"
@@ -33,7 +33,7 @@ resource "aws_lb_listener" "ecs_https" {
 }
 
 resource "aws_lb_listener" "ecs_http_redirect" {
-  count = "${var.alb ? 1 : 0}"
+  count = var.alb ? 1 : 0
 
   load_balancer_arn = aws_lb.ecs[0].arn
   port              = "80"
@@ -51,19 +51,19 @@ resource "aws_lb_listener" "ecs_http_redirect" {
 }
 
 resource "aws_lb_target_group" "ecs_default_http" {
-  count = "${var.alb ? 1 : 0}"
+  count = var.alb ? 1 : 0
 
   name     = "ecs-${var.name}-default-http"
   port     = 80
   protocol = "HTTP"
-  vpc_id   = "${var.vpc_id}"
+  vpc_id   = var.vpc_id
 }
 
 resource "aws_lb_target_group" "ecs_default_https" {
-  count = "${var.alb ? 1 : 0}"
+  count = var.alb ? 1 : 0
 
   name     = "ecs-${var.name}-default-https"
   port     = 80
   protocol = "HTTP"
-  vpc_id   = "${var.vpc_id}"
+  vpc_id   = var.vpc_id
 }

asg.tf

@@ -4,37 +4,37 @@ resource "aws_autoscaling_group" "ecs" {
   mixed_instances_policy {
     launch_template {
       launch_template_specification {
-        launch_template_id = "${aws_launch_template.ecs.id}"
+        launch_template_id = aws_launch_template.ecs.id
         version            = "$Latest"
       }
 
       override {
-        instance_type = "${var.instance_type_1}"
+        instance_type = var.instance_type_1
       }
 
       override {
-        instance_type = "${var.instance_type_2}"
+        instance_type = var.instance_type_2
       }
 
       override {
-        instance_type = "${var.instance_type_3}"
+        instance_type = var.instance_type_3
       }
     }
 
     instances_distribution {
       spot_instance_pools                      = 3
-      on_demand_base_capacity                  = "${var.on_demand_base_capacity}"
-      on_demand_percentage_above_base_capacity = "${var.on_demand_percentage}"
+      on_demand_base_capacity                  = var.on_demand_base_capacity
+      on_demand_percentage_above_base_capacity = var.on_demand_percentage
     }
   }
 
   vpc_zone_identifier = var.private_subnet_ids
 
-  min_size = "${var.asg_min}"
-  max_size = "${var.asg_max}"
+  min_size = var.asg_min
+  max_size = var.asg_max
 
   tags = [
-    "${map("key", "Name", "value", "ecs-node-${var.name}", "propagate_at_launch", true)}",
+    map("key", "Name", "value", "ecs-node-${var.name}", "propagate_at_launch", true)
   ]
 
   target_group_arns = var.target_group_arns
@@ -48,14 +48,14 @@ resource "aws_autoscaling_group" "ecs" {
 resource "aws_autoscaling_policy" "ecs_memory_tracking" {
   name                      = "ecs-${var.name}-memory"
   policy_type               = "TargetTrackingScaling"
-  autoscaling_group_name    = "${aws_autoscaling_group.ecs.name}"
+  autoscaling_group_name    = aws_autoscaling_group.ecs.name
   estimated_instance_warmup = "180"
 
   target_tracking_configuration {
     customized_metric_specification {
       metric_dimension {
         name  = "ClusterName"
-        value = "${aws_ecs_cluster.ecs.name}"
+        value = aws_ecs_cluster.ecs.name
       }
 
       metric_name = "MemoryReservation"
@@ -64,6 +64,6 @@ resource "aws_autoscaling_policy" "ecs_memory_tracking" {
       unit        = "Percent"
     }
 
-    target_value = "${var.asg_memory_target}"
+    target_value = var.asg_memory_target
   }
 }

cf-exports.tf

@@ -4,23 +4,23 @@ resource "aws_cloudformation_stack" "tf_exports" {
   template_body = templatefile("${path.module}/cf-exports.yml", {
     "name" = var.name,
     "vars" = {
-      "AlbId"                 = "${aws_lb.ecs.*.id[0]}",
-      "AlbArn"                = "${aws_lb.ecs.*.arn[0]}",
-      "AlbDnsName"            = "${aws_lb.ecs.*.dns_name[0]}",
-      "AlbZoneId"             = "${aws_lb.ecs.*.zone_id[0]}",
-      "AlbSecgrpId"           = "${aws_security_group.alb.*.id[0]}"
-      "EcsIamRoleArn"         = "${aws_iam_role.ecs.arn}",
-      "EcsIamRoleName"        = "${aws_iam_role.ecs.name}",
-      "EcsServiceIamRoleArn"  = "${aws_iam_role.ecs_service.arn}",
-      "EcsServiceIamRoleName" = "${aws_iam_role.ecs_service.name}",
-      "EcsTaskIamRoleArn"     = "${aws_iam_role.ecs_task.arn}",
-      "EcsTaskIamRoleName"    = "${aws_iam_role.ecs_task.name}",
-      "EcsId"                 = "${aws_ecs_cluster.ecs.*.id[0]}",
-      "EcsName"               = "${aws_ecs_cluster.ecs.*.name[0]}",
-      "EcsArn"                = "${aws_ecs_cluster.ecs.*.arn[0]}",
-      "AlbListenerHttpsArn"   = "${aws_lb_listener.ecs_https.*.arn[0]}",
-      "EcsNodesSecGrpId"      = "${aws_security_group.ecs_nodes.id}",
-      "VpcId"                 = "${var.vpc_id}"
+      "AlbId"                 = aws_lb.ecs.*.id[0],
+      "AlbArn"                = aws_lb.ecs.*.arn[0],
+      "AlbDnsName"            = aws_lb.ecs.*.dns_name[0],
+      "AlbZoneId"             = aws_lb.ecs.*.zone_id[0],
+      "AlbSecgrpId"           = aws_security_group.alb.*.id[0]
+      "EcsIamRoleArn"         = aws_iam_role.ecs.arn,
+      "EcsIamRoleName"        = aws_iam_role.ecs.name,
+      "EcsServiceIamRoleArn"  = aws_iam_role.ecs_service.arn,
+      "EcsServiceIamRoleName" = aws_iam_role.ecs_service.name,
+      "EcsTaskIamRoleArn"     = aws_iam_role.ecs_task.arn,
+      "EcsTaskIamRoleName"    = aws_iam_role.ecs_task.name,
+      "EcsId"                 = aws_ecs_cluster.ecs.*.id[0],
+      "EcsName"               = aws_ecs_cluster.ecs.*.name[0],
+      "EcsArn"                = aws_ecs_cluster.ecs.*.arn[0],
+      "AlbListenerHttpsArn"   = aws_lb_listener.ecs_https.*.arn[0],
+      "EcsNodesSecGrpId"      = aws_security_group.ecs_nodes.id,
+      "VpcId"                 = var.vpc_id
     }
   })
-}
+}

cloutwatch-alarms.tf

@@ -1,5 +1,5 @@
 resource "aws_cloudwatch_metric_alarm" "high_memory" {
-  count = "${length(var.alarm_sns_topics) > 0 ? 1 : 0}"
+  count = length(var.alarm_sns_topics) > 0 ? 1 : 0
 
   alarm_name                = "${data.aws_iam_account_alias.current.account_alias}-ecs-${var.name}-high-memory"
   comparison_operator       = "GreaterThanOrEqualToThreshold"
@@ -14,12 +14,12 @@ resource "aws_cloudwatch_metric_alarm" "high_memory" {
   ok_actions                = var.alarm_sns_topics
 
   dimensions = {
-    ClusterName = "${aws_ecs_cluster.ecs.name}"
+    ClusterName = aws_ecs_cluster.ecs.name
   }
 }
 
 resource "aws_cloudwatch_metric_alarm" "high_cpu" {
-  count = "${length(var.alarm_sns_topics) > 0 ? 1 : 0}"
+  count = length(var.alarm_sns_topics) > 0 ? 1 : 0
 
   alarm_name                = "${data.aws_iam_account_alias.current.account_alias}-ecs-${var.name}-high-cpu"
   comparison_operator       = "GreaterThanOrEqualToThreshold"
@@ -34,6 +34,6 @@ resource "aws_cloudwatch_metric_alarm" "high_cpu" {
   ok_actions                = var.alarm_sns_topics
 
   dimensions = {
-    ClusterName = "${aws_ecs_cluster.ecs.name}"
+    ClusterName = aws_ecs_cluster.ecs.name
   }
 }

ec2-launch-template.tf

@@ -1,41 +1,41 @@
 data "template_file" "userdata" {
-  template = "${file("${path.module}/userdata.tpl")}"
+  template = file("${path.module}/userdata.tpl")
 
   vars = {
-    tf_cluster_name = "${aws_ecs_cluster.ecs.name}"
-    tf_efs_id       = "${aws_efs_file_system.ecs.id}"
-    userdata_extra  = "${var.userdata}"
+    tf_cluster_name = aws_ecs_cluster.ecs.name
+    tf_efs_id       = aws_efs_file_system.ecs.id
+    userdata_extra  = var.userdata
   }
 }
 
 resource "aws_launch_template" "ecs" {
   name_prefix   = "ecs-${var.name}-"
-  image_id      = "${data.aws_ami.amzn.image_id}"
-  instance_type = "${var.instance_type_1}"
+  image_id      = data.aws_ami.amzn.image_id
+  instance_type = var.instance_type_1
 
   iam_instance_profile {
-    name = "${aws_iam_instance_profile.ecs.name}"
+    name = aws_iam_instance_profile.ecs.name
   }
 
   block_device_mappings {
     device_name = "/dev/xvda"
 
     ebs {
-      volume_size = "${var.instance_volume_size_root}"
+      volume_size = var.instance_volume_size_root
     }
   }
 
   block_device_mappings {
     device_name = "/dev/xvdcz"
 
     ebs {
-      volume_size = "${var.instance_volume_size}"
+      volume_size = var.instance_volume_size
     }
   }
 
   vpc_security_group_ids = concat(list(aws_security_group.ecs_nodes.id), var.security_group_ids)
 
-  user_data = "${base64encode(data.template_file.userdata.rendered)}"
+  user_data = base64encode(data.template_file.userdata.rendered)
 
   lifecycle {
     create_before_destroy = true

ecs.tf

@@ -1,3 +1,3 @@
 resource "aws_ecs_cluster" "ecs" {
-  name = "${var.name}"
+  name = var.name
 }