platforms/aws: configure root block device settings (coreos#256)

... for masters, workers and etcd nodes.

Fixes coreos#209

modules/aws/etcd/nodes.tf

@@ -36,4 +36,10 @@ resource "aws_instance" "etcd_node" {
       "Name", "${var.cluster_name}-etcd-${count.index}",
       "KubernetesCluster", "${var.cluster_name}"
     ), var.extra_tags)}"
+
+  root_block_device {
+    volume_type = "${var.root_volume_type}"
+    volume_size = "${var.root_volume_size}"
+    iops        = "${var.root_volume_iops}"
+  }
 }

modules/aws/etcd/variables.tf

@@ -51,3 +51,18 @@ variable "extra_tags" {
   type        = "map"
   default     = {}
 }
+
+variable "root_volume_type" {
+  type        = "string"
+  description = "The type of volume for the root block device."
+}
+
+variable "root_volume_size" {
+  type        = "string"
+  description = "The size of the volume in gigabytes for the root block device."
+}
+
+variable "root_volume_iops" {
+  type        = "string"
+  description = "The amount of provisioned IOPS for the root block device."
+}

modules/aws/master-asg/master.tf

@@ -68,6 +68,12 @@ resource "aws_launch_configuration" "master_conf" {
   lifecycle {
     create_before_destroy = true
   }
+
+  root_block_device {
+    volume_type = "${var.root_volume_type}"
+    volume_size = "${var.root_volume_size}"
+    iops        = "${var.root_volume_iops}"
+  }
 }
 
 resource "aws_security_group" "master_sec_group" {

modules/aws/master-asg/variables.tf

@@ -72,3 +72,18 @@ variable "custom_dns_name" {
   default     = ""
   description = "DNS prefix used to construct the console and API server endpoints."
 }
+
+variable "root_volume_type" {
+  type        = "string"
+  description = "The type of volume for the root block device."
+}
+
+variable "root_volume_size" {
+  type        = "string"
+  description = "The size of the volume in gigabytes for the root block device."
+}
+
+variable "root_volume_iops" {
+  type        = "string"
+  description = "The amount of provisioned IOPS for the root block device."
+}

modules/aws/worker-asg/variables.tf

@@ -46,3 +46,18 @@ variable "autoscaling_group_extra_tags" {
   type        = "list"
   default     = []
 }
+
+variable "root_volume_type" {
+  type        = "string"
+  description = "The type of volume for the root block device."
+}
+
+variable "root_volume_size" {
+  type        = "string"
+  description = "The size of the volume in gigabytes for the root block device."
+}
+
+variable "root_volume_iops" {
+  type        = "string"
+  description = "The amount of provisioned IOPS for the root block device."
+}

modules/aws/worker-asg/worker.tf

@@ -34,6 +34,12 @@ resource "aws_launch_configuration" "worker_conf" {
   lifecycle {
     create_before_destroy = true
   }
+
+  root_block_device {
+    volume_type = "${var.root_volume_type}"
+    volume_size = "${var.root_volume_size}"
+    iops        = "${var.root_volume_iops}"
+  }
 }
 
 resource "aws_autoscaling_group" "workers" {

platforms/aws/main.tf

@@ -33,6 +33,10 @@ module "etcd" {
 
   external_endpoints = ["${compact(var.tectonic_etcd_servers)}"]
   extra_tags         = "${var.tectonic_aws_extra_tags}"
+
+  root_volume_type = "${var.tectonic_aws_etcd_root_volume_type}"
+  root_volume_size = "${var.tectonic_aws_etcd_root_volume_size}"
+  root_volume_iops = "${var.tectonic_aws_etcd_root_volume_iops}"
 }
 
 module "ignition-masters" {
@@ -71,6 +75,10 @@ module "masters" {
   extra_tags                   = "${var.tectonic_aws_extra_tags}"
   autoscaling_group_extra_tags = "${var.tectonic_autoscaling_group_extra_tags}"
   custom_dns_name              = "${var.tectonic_dns_name}"
+
+  root_volume_type = "${var.tectonic_aws_master_root_volume_type}"
+  root_volume_size = "${var.tectonic_aws_master_root_volume_size}"
+  root_volume_iops = "${var.tectonic_aws_master_root_volume_iops}"
 }
 
 module "ignition-workers" {
@@ -102,4 +110,8 @@ module "workers" {
   user_data                    = "${module.ignition-workers.ignition}"
   extra_tags                   = "${var.tectonic_aws_extra_tags}"
   autoscaling_group_extra_tags = "${var.tectonic_autoscaling_group_extra_tags}"
+
+  root_volume_type = "${var.tectonic_aws_master_root_volume_type}"
+  root_volume_size = "${var.tectonic_aws_master_root_volume_size}"
+  root_volume_iops = "${var.tectonic_aws_master_root_volume_iops}"
 }

platforms/aws/variables.tf

@@ -73,3 +73,57 @@ variable "tectonic_dns_name" {
   default     = ""
   description = "DNS prefix used to construct the console and API server endpoints."
 }
+
+variable "tectonic_aws_etcd_root_volume_type" {
+  type        = "string"
+  default     = "gp2"
+  description = "The type of volume for the root block device of etcd nodes."
+}
+
+variable "tectonic_aws_etcd_root_volume_size" {
+  type        = "string"
+  default     = "30"
+  description = "The size of the volume in gigabytes for the root block device of etcd nodes."
+}
+
+variable "tectonic_aws_etcd_root_volume_iops" {
+  type        = "string"
+  default     = "0"
+  description = "The amount of provisioned IOPS for the root block device of etcd nodes."
+}
+
+variable "tectonic_aws_master_root_volume_type" {
+  type        = "string"
+  default     = "gp2"
+  description = "The type of volume for the root block device of master nodes."
+}
+
+variable "tectonic_aws_master_root_volume_size" {
+  type        = "string"
+  default     = "30"
+  description = "The size of the volume in gigabytes for the root block device of master nodes."
+}
+
+variable "tectonic_aws_master_root_volume_iops" {
+  type        = "string"
+  default     = "0"
+  description = "The amount of provisioned IOPS for the root block device of master nodes."
+}
+
+variable "tectonic_aws_worker_root_volume_type" {
+  type        = "string"
+  default     = "gp2"
+  description = "The type of volume for the root block device of worker nodes."
+}
+
+variable "tectonic_aws_worker_root_volume_size" {
+  type        = "string"
+  default     = "30"
+  description = "The size of the volume in gigabytes for the root block device of worker nodes."
+}
+
+variable "tectonic_aws_worker_root_volume_iops" {
+  type        = "string"
+  default     = "0"
+  description = "The amount of provisioned IOPS for the root block device of worker nodes."
+}