diff --git a/main.tf b/main.tf
index 19b1c7b..e145ad1 100644
--- a/main.tf
+++ b/main.tf
@@ -11,20 +11,33 @@ locals {
   ]
   aws-security-group-id = module.aws-network-existing.default-sg.id
   # aws-security-group-id = module.aws-network-from-scratch.default-security-group.id
+
+  # The names of these nodes is created by:
+  # "{var.vm-name-prefix}-{name from nodes-config}-{number}"
+  # The length of this full name must be < 16 characters. This is a limitaion of
+  # Active Directory? The "realm join" command failed when the name was too
+  # long, although it did not give the reason for the failure, the reason was
+  # surmised because it looked like it was truncating the name when attempting
+  # to join.
   nodes-config = {
+    # TODO if the above comment about the name length is true, then this name is
+    # too long. IMPORTANT! If you change this then you need to change the k8s
+    # ansible role that assigns roles based on wether or not 'master' is in the
+    # name.
     "k8s-master" = {
       base-image = var.ubuntu-ami
       aws-ec2-type = var.t2-medium-4gib-2vcpu
       subnet-ids = local.k8s-subnets-ids
-      num = 0
+      num = 1
     },
-    "k8s-worker" = {
+    "k8s-wrkr" = {
       base-image = var.ubuntu-ami
       aws-ec2-type = var.t2-medium-4gib-2vcpu
       subnet-ids = local.k8s-subnets-ids
-      num = 0
+      disk-size = 20
+      num = 2
     },
-    "ansible-test" = {
+    "test" = {
       base-image = var.ubuntu-ami
       aws-ec2-type = var.t2-micro-1gib-1vcpu
       # subnet-ids = [module.aws-network-from-scratch.subnet.id]
@@ -38,7 +51,7 @@ locals {
       subnet-ids = [module.aws-network-existing.subnet-by-name["subnet_4"].id]
       num = 1
       num-disks = 1
-      disk-size = 10
+      zfs-disk-size = 10
     },
     "proxy" = {
       base-image = var.ubuntu-ami
@@ -119,7 +132,7 @@ resource "aws_key_pair" "key" {
 resource "aws_ebs_volume" "zfs" {
   # TODO REM look at types.
   availability_zone = local.nfs-subnets[0].availability_zone
-  size = local.nodes-config["nfs"].disk-size
+  size = local.nodes-config["nfs"].zfs-disk-size
   encrypted = true
   count = local.nodes-config["nfs"].num-disks
   tags = {
@@ -147,12 +160,27 @@ module "nodes" {
   private-ips        = try(each.value.private-ips, [])
   security-group-ids = [local.aws-security-group-id]
   user-datas         = lookup(module.cloud-init-config, each.key, null).user-datas
+  disk-size          = try(each.value.disk-size, null)
   num-nodes          = each.value.num
   name-prefix        = "${var.vm-name-prefix}-${each.key}"
   # TODO add a input for the key so that it will show up as the key in the aws
   # console.
 }
 
+# TODO an attempt to create a windows machine.
+# module "nodes-win" {
+#   source             = "./modules/aws-nodes"
+#   ec2-instance-type  = var.t2-small-2gib-1vcpu
+#   ami                = var.win-srv-2019-ami
+#   subnet-ids         = [module.aws-network-existing.subnet-by-name["subnet_2"].id]
+#   private-ips        = []
+#   security-group-ids = [local.aws-security-group-id]
+#   # TODO REM need to figure out how to not pass a user data.
+#   user-datas         = [null]
+#   num-nodes          = 1
+#   name-prefix        = "${var.vm-name-prefix}-win-test"
+# }
+
 ################################################################################
 # end aws
 ################################################################################
diff --git a/modules/aws-amis/main.tf b/modules/aws-amis/main.tf
index 8cb82d8..37989ff 100644
--- a/modules/aws-amis/main.tf
+++ b/modules/aws-amis/main.tf
@@ -48,7 +48,14 @@ locals {
       # us-gov-west-1
       owner-id = "219670896067"
       name = "RHEL-8.*HVM*x86_64*GP2"
-    }
+    },
+    win-srv-2019 = {
+      # us-east-2
+      # owner-id = "???"
+      # us-gov-west-1
+      owner-id = "077303321853"
+      name = "Windows_Server-2019-English-Full-Base*"
+    },
   }
 }
 
diff --git a/modules/aws-nodes/main.tf b/modules/aws-nodes/main.tf
index 1b994b7..a3f9873 100644
--- a/modules/aws-nodes/main.tf
+++ b/modules/aws-nodes/main.tf
@@ -8,8 +8,12 @@ resource "aws_instance" "nodes" {
   # the IP.
   private_ip = length(var.private-ips) == 0 ? null : element(var.private-ips, count.index)
   vpc_security_group_ids = var.security-group-ids
-  user_data = element(var.user-datas.*.rendered, count.index)
-  count                       = var.num-nodes
+  user_data              = element(var.user-datas.*.rendered, count.index)
+  root_block_device {
+    volume_size           = var.disk-size
+    delete_on_termination = true
+  }
+  count = var.num-nodes
 
   tags = {
     Name = "${var.name-prefix}-${count.index}"
diff --git a/modules/aws-nodes/variables.tf b/modules/aws-nodes/variables.tf
index 9eec3f0..0476f5b 100644
--- a/modules/aws-nodes/variables.tf
+++ b/modules/aws-nodes/variables.tf
@@ -1,30 +1,36 @@
 variable "ami" {
   description = "The AWS AMI to be used for all the nodes"
-  type = string
+  type        = string
+}
+
+variable "disk-size" {
+  default     = 8
+  description = "The size of the root FS disk in GB."
+  type        = number
 }
 
 variable "ec2-instance-type" {
-  default = "t2.micro"
+  default     = "t2.micro"
   description = "The AWS instance type to use for all nodes."
-  type = string
+  type        = string
 }
 
 variable "name-prefix" {
-  default = "tf-node"
+  default     = "tf-node"
   description = "This prefix will be applied to all names created by this module."
-  type = string
+  type        = string
 }
 
 variable "num-nodes" {
-  default = 1
+  default     = 1
   description = "The number of nodes to create from the given input parameters."
-  type = number
+  type        = number
 }
 
 variable "private-ips" {
-  default = []
+  default     = []
   description = "A list of private IP addresses to use for the nodes. If the list is empty then each node will get an IP assigned from AWS."
-  type = list(string)
+  type        = list(string)
 }
 
 variable "user-datas" {
@@ -33,10 +39,10 @@ variable "user-datas" {
 
 variable "subnet-ids" {
   description = "An array of subnet ids. These subnets will be round robined as the subnet to use for each node."
-  type = list(string)
+  type        = list(string)
 }
 
 variable "security-group-ids" {
   description = "A list of security group IDs to be applied to all the nodes."
-  type = list(string)
+  type        = list(string)
 }
diff --git a/variables.tf b/variables.tf
index cd083b4..c84adb0 100644
--- a/variables.tf
+++ b/variables.tf
@@ -122,14 +122,14 @@ variable "amzn2-ami" {
   # us-east-2
   # default     = "ami-0dd0ccab7e2801812"
   # us-gov-west-1
-  default     = "ami-098bf51d9a35299f0"
+  default     = "ami-02ab588324a95cf31"
   description = "The AMI to use for Amazon Linux 2."
 }
 variable "ubuntu-ami" {
   # us-east-2
   # default = "ami-06c7d6c0987eaa46c"
   # us-gov-west-1
-  default = "ami-087ee83c8de303181"
+  default = "ami-066189aeb91baa0ab"
   description = "The AMI to use for Ubuntu."
 }
 variable "centos7-ami" {
@@ -161,6 +161,13 @@ variable "rhel8-ami" {
   default = "ami-0b1f10cd1cd107dd2"
   description = "The AMI to use for RHEL 8."
 }
+variable "win-srv-2019-ami" {
+  # us-east-2
+  # default = ???
+  # us-gov-west-1
+  default = "ami-0f838c3c35ab60fc4"
+  description = "The AMI to use for Windows Server 2019."
+}
 
 ################################################################################
 # AWS EC2 types.
@@ -173,6 +180,11 @@ variable "t2-micro-1gib-1vcpu" {
   default = "t2.micro"
 }
 
+variable "t2-small-2gib-1vcpu" {
+  description = "t2.small EC2 instance with 2 GiB mem and 1 vCPUs."
+  default = "t2.small"
+}
+
 variable "t2-medium-4gib-2vcpu" {
   description = "t2.medium EC2 instance with 4 GiB mem and 2 vCPUs."
   default = "t2.medium"