Use config map and added RHEL 7 & 8.

- Moved network_config.cfg to libvirt-nodes.

cloud_init.cfg

@@ -24,19 +24,9 @@ chpasswd:
   expire: false
 
 hostname: ${hostname}
-fqdn: ${hostname}
 
-%{ if install-qemu-agent }
+# Use this when it's determined that we need a bigger disk image.
-packages:
+# This must be used in conjuction with 'size' in 'libvirt_volume'
-  # This are only necessary for libvirt.
+# growpart:
-  - qemu-guest-agent
+#   mode: auto
-runcmd:
+#   devices: ['/']
-  # TODO At some point revisit this, this was added because it seemed like
-  # apparmor was causing dhclient to not get an IP address for ubuntu. This
-  # should be double checked.
-  - echo "/proc/*/task/*/comm wr," | tee -a /etc/apparmor.d/local/sbin.dhclient
-  # These are only necessary for libvirt.
-  - systemctl enable qemu-guest-agent
-  - systemctl start qemu-guest-agent
-  - systemctl status qemu-guest-agent
-%{ endif }

example.tfvars

@@ -10,15 +10,6 @@ libvirt-connection-url = "qemu+ssh://<user>@<host>/system"
 node-memory = 2048
 node-vcpus = 2
 
-## libvirt disk size
-# 1 GiB = 1073741824
-# 4 GiB
-# libvirt-node-disk-size = "${4 * 1073741824}"
-# 8 GiB
-# libvirt-node-disk-size = "${8 * 1073741824}"
-# 12 GiB
-# libvirt-node-disk-size = "${12 * 1073741824}"
-
 ################################################################################
 # AWS EC2 instance types
 ################################################################################
@@ -60,18 +51,8 @@ base-image = "ami-0dd0ccab7e2801812"
 ################################################################################
 
 # base-image = "https://cloud-images.ubuntu.com/releases/focal/release/ubuntu-20.04-server-cloudimg-amd64-disk-kvm.img"
-# From https://cloud.centos.org/centos/7/images/ from	2020-12-06
+# From https://cloud.centos.org/centos/7/images/ from	2020-11-12 06:52
-# base-image = "https://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud-2111.qcow2"
+# base-image = "https://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud-2009.qcow2"
-
-## Arch
-# From https://gitlab.archlinux.org/archlinux/arch-boxes/-/jobs/40102/artifacts/browse/output
-# on 2021-11-28
-# base-image = "/media/nas/software/isos/Arch-Linux-x86_64-libvirt-20211128.40102.box"
-
-## Arch
-# From https://gitlab.archlinux.org/archlinux/arch-boxes/-/jobs/40102/artifacts/browse/output
-# on 2021-11-28
-# base-image = "/media/nas/software/isos/Arch-Linux-x86_64-libvirt-20211128.40102.box"
 
 ################################################################################
 # Keys/Passwords

get-aws-node-status.sh

@@ -1,4 +0,0 @@
-#!/bin/sh
-
-aws ec2 describe-instance-status | \
-    jq '.InstanceStatuses[] | {id: .InstanceId, instance_status: .InstanceStatus.Status, system_status: .SystemStatus.Status}'

get-libvirt-bridge-ips.sh

@@ -1,81 +0,0 @@
-#!/bin/bash
-
-# This script will grab the IPs for libvirt VMs. This script is only needed when
-# using a bridge as the network for the VMs. This should only be needed while
-# https://github.com/dmacvicar/terraform-provider-libvirt/issues/891 is
-# unresolved.
-
-# These are the network interfaces that this script will attempt to get the IP
-# address for.
-# Ubuntu 20.04    ens3
-# Centos 7 & 8    eth0
-NET_INTERFACES="eth0 ens3"
-
-LIBVIRT_CONNECTION_URL="libvirt-connection-url"
-VM_NAME_PREFIX="vm-name-prefix"
-
-INV_GROUPS="$( \
-cat terraform.tfstate | \
-    jq '.resources[] | select(.type=="libvirt_domain") | .module' | \
-    sed 's/".*\[\\"\(.*\)\\.*$/\1/g' )"
-
-# Grab the connection URL and the vm name prefix. We do this by greping all
-# *.tfvars files making sure to cat terraform.tfvars last. Then we just grab the
-# last grep result, this way we make sure any value in terraform.tfvars will
-# take priority.
-CONN_URLS="$( \
-    find . -name "*.tfvars" -exec grep "$LIBVIRT_CONNECTION_URL" {} \; && \
-    grep "$LIBVIRT_CONNECTION_URL" terraform.tfvars)"
-
-CONN_URL="$(echo "$CONN_URLS" | tail -n 1 | sed 's/^.*=\s*"\(.*\)"/\1/g')"
-
-NAME_PREFIXES="$( \
-    find . -name "*.tfvars" -exec grep "$VM_NAME_PREFIX" {} \; && \
-    grep "$VM_NAME_PREFIX" terraform.tfvars)"
-
-NAME_PREFIX="$(echo "$NAME_PREFIXES" | tail -n 1 | sed 's/^.*=\s*"\(.*\)"/\1/g')"
-
-# These can be used for debugging.
-# echo "Using connection URL: $CONN_URL"
-# echo "Using prefix: $NAME_PREFIX"
-
-# Get the names of our VMs from libvirt.
-VMS="$(virsh -c $CONN_URL list --all | grep $NAME_PREFIX | awk '{print $2}')"
-
-# Convert the lines of VM names to an array.
-OLD_IFS=$IFS
-IFS=$'\n'
-VMS=($VMS)
-IFS=$OLD_IFS
-
-# Loop over our VM array and grab the ipv4 IP address from libvirt. Then add the
-# result to VM_IP_PAIRS as <vm-name>:<ipv4-address>.
-VM_IP_PAIRS=""
-for VM in "${VMS[@]}"; do
-    for INTERFACE in $NET_INTERFACES; do
-        IP="$( \
-            virsh -c $CONN_URL qemu-agent-command $VM '{"execute": "guest-network-get-interfaces"}' | \
-            jq '.return[] | select(.name=="'"$INTERFACE"'") | ."ip-addresses"[] | select(."ip-address-type"=="ipv4") | ."ip-address"' | \
-            sed 's/"//g')"
-        # Add the VM:IP pair if IP is not empty.
-        if [ ! -z "$IP" ]; then
-            VM_IP_PAIRS="$VM_IP_PAIRS"$'\n'"$VM:$IP"
-        fi
-    done
-done
-
-# Write inventory
-cat /dev/null > inventory
-for GROUP in $INV_GROUPS; do
-    echo "[$GROUP]" >> inventory
-    echo "$VM_IP_PAIRS" | \
-        grep $GROUP | \
-        sed 's/^\(.*\):\(.*\)$/\1 ansible_host=\2/g' >> inventory
-done
-
-# Print vars
-echo "$VM_IP_PAIRS" | \
-    sed 's/^\(.*\):\(.*\)$/\1=\2/g' | \
-    sed s/$NAME_PREFIX-//g | \
-    sed 's/-/_/g' | \
-    awk '{print toupper($1)}'

get-vm-ips.sh

@@ -1,92 +1,61 @@
-#!/bin/bash
+#!/bin/sh
 
-# This script will create environment variables for all of the output IPs. An
+# This script will create environment variables for all of the output IPs. It
-# anisble inventory file is created as well.
+# will also create a `ANSIBLE_INV` variable that will be a comma separated
+# string of all the IPs. A anisble inventory file called "inventory is created
+# as well.
 #
 # Use eval $(./get-vm-ips.sh) to set env vars for ips.
 
 terraform refresh > /dev/null
 
-# The file to write the inventory to. This file will be completely overridden.
+# All terraform outputs in json format.
-INVENTORY_FILE="inventory"
+OUTPUTS_JSON="$(
-
+    terraform show -json | \
-# Grab the the vm name prefix. We do this by greping all *.tfvars files making
+        jq '.values.outputs' | \
-# sure to cat terraform.tfvars last. Then we just grab the last grep result,
+        sed 's/-/_/g')"
-# this way we make sure any value in terraform.tfvars will take priority.
+# Just the IP address outputs in json format. Also all '-' characters are
-VM_NAME_PREFIX_VAR="vm-name-prefix"
+# replaced by '_' becuase '-' causes jq some problems.
-VM_NAME_PREFIXES="$( \
+IPS_JSON="$(
-    find . -name "*.tfvars" -exec grep "$VM_NAME_PREFIX_VAR" {} \; && \
+    echo $OUTPUTS_JSON | \
-    grep "$VM_NAME_PREFIX_VAR" terraform.tfvars)"
+        jq 'to_entries | .[] | select(.key | contains("ips"))')"
-VM_NAME_PREFIX="$(
+# An array of all node "types"
-    echo "$VM_NAME_PREFIXES" | \
+NODE_TYPE_ARRAY="$(
-        tail -n 1 | \
+    echo $IPS_JSON | \
-        sed 's/^.*=\s*"\(.*\)"/\1/g')"
+        jq '.value.value | to_entries | .[] | .key' | \
-
-# This command stores the output data in the format below.
-# [
-#   {
-#     "group": "master",
-#     "vms": [
-#       {
-#         "hostname": "ansible-test-master-0",
-#         "ip": "52.14.114.48"
-#       }
-#     ]
-#   },
-#   {
-#     "group": "worker",
-#     "vms": [
-#       {
-#         "hostname": "ansible-test-worker-0",
-#         "ip": "3.145.121.159"
-#       },
-#       {
-#         "hostname": "ansible-test-worker-1",
-#         "ip": "18.217.112.176"
-#       }
-#     ]
-#   }
-# ]
-DATA="$(terraform show -json | \
-    jq '.values.outputs.groups_hostnames_ips.value | to_entries |
-        map({group: .key, vms:.value | to_entries |
-        map({hostname:.key,ip:.value})})')"
-
-# Pull out the groups from $DATA. The format is a single string with the groups
-# separated by spaces, ie. "group1 group2 group3".
-ANS_GROUPS="$(
-    echo $DATA | \
-        jq '.[] | .group' | \
         sed 's/"//g' | \
-        tr '\n' ' '
+        sed -z 's/\n/ /g;s/ $/\n/g')"
-    )"
 
-# Clear the inventory file.
+# Loop over all the node types and create an export line for each IP.
-cat /dev/null > $INVENTORY_FILE
+VM_IP_EXPORTS="$(
+    for TYPE in $NODE_TYPE_ARRAY; do
 
-# For each group, write the VM info to $INVENTORY_FILE and also print a variable
+        # Convert type, converts "master-ips" to "MASTER"
-# expression to stdout.
+        TYPE_UPPER="$(echo ${TYPE^^} | sed s/_.*$//g)"
-for GROUP in $ANS_GROUPS; do
+        echo "$IPS_JSON" | \
+            jq '.value.value.'"$TYPE"'[]' | \
+            # Add line numbers starting with 0.
+            nl -v 0 | \
+            # Print an export string with a type placeholder "__TYPE__".
+            awk '{print "export __TYPE___" $1 "=" $2}' | \
+            sed s/__TYPE__/$TYPE_UPPER/g
+    done)"
 
-    # Write the inventory file to $INVENTORY_FILE.
+ANSIBLE_INV="$(
-    echo "[$GROUP]" >> $INVENTORY_FILE
+    echo "$VM_IP_EXPORTS" | \
-    echo $DATA | \
+        sed 's/"//g' | \
-        jq '.[] | select(.group=="'"$GROUP"'") | .vms[] | 
+        sed 's/^.*=//g' | \
-            "\(.hostname) ansible_host=\(.ip)"' | \
+        sed -z 's/\n/,/g;s/,$/\n/g')"
-        sed 's/"//g' \
-            >> $INVENTORY_FILE
 
-    # For this group, collect expressions into VARS. The format is:
+# Create an inventory file for ansible.
-    # HOSTNAME1=0.0.0.0
+echo "# Wrote an Ansible inventory file at ./inventory"
-    # HOSTNAME2=0.0.0.0
+echo "[k8s_nodes]" > inventory
-    VARS="$(
+echo $VM_IP_EXPORTS | \
-        echo $DATA | \
+    sed 's/"//g' | \
-            jq '.[] | select(.group=="'"$GROUP"'") | .vms[] | 
+    sed 's/export //g' | \
-                "\(.hostname)=\(.ip)"' | \
+    sed 's/ /\n/g' | \
-            sed 's/"//g' | \
+    sed 's/^\(.*\)\(=.*\)$/\1 ansible_host\2/g' \
-            sed "s/$VM_NAME_PREFIX-//g" | \
+        >> inventory
-            sed 's/-/_/g'
+
-        )"
+echo $VM_IP_EXPORTS | sed 's/" /"\n/g'
-    # Print the contents of $VARS converted to uppercase.
+echo export ANSIBLE_INV=$ANSIBLE_INV
-    echo "${VARS^^}"
-done

main.tf

@@ -1,16 +1,44 @@
+terraform {
+  required_version = ">= 1.0.8"
+  required_providers {
+    libvirt = {
+      source  = "dmacvicar/libvirt"
+      version = "0.6.11"
+    }
+  }
+}
 
 locals {
   nodes-config = {
-    "master" = {
+    "amzn2" = {
+      base-image = var.amzn2-ami
+      num = 1
+    },
+    "ubuntu" = {
+      base-image = var.ubuntu-ami
+      num = 1
+    },
+    "arch" = {
+      base-image = var.arch-ami
+      num = 1
+    },
+    "centos7" = {
+      base-image = var.centos7-ami
+      num = 1
+    },
+    "centos8" = {
       base-image = var.centos8-ami
       num = 1
     },
-    "worker" = {
+    "rhel7" = {
-      base-image = var.centos8-ami
+      base-image = var.rhel7-ami
-      num = 2
+      num = 1
+    },
+    "rhel8" = {
+      base-image = var.rhel8-ami
+      num = 1
     }
   }
-  install-qemu-agent = false
 }
 
 ################################################################################
@@ -25,7 +53,6 @@ module "cloud-init-config" {
   num                 = each.value.num
   root-admin-passwd   = var.root-admin-passwd
   root-admin-pub-key  = var.root-admin-pub-key
-  install-qemu-agent  = local.install-qemu-agent
 }
 
 ################################################################################
@@ -34,6 +61,10 @@ module "cloud-init-config" {
 # libvirt modules/resources.
 ################################################################################
 
+provider "aws" {
+  region = "us-east-2"
+}
+
 # This module will grab the latest ami for a variety of distros. Uncomment to
 # get a list of the latest AMIs for our supported distros.
 # module "aws-amis" {
@@ -43,27 +74,14 @@ module "cloud-init-config" {
 #   value = module.aws-amis.amis
 # }
 
-################################################################################
+module "aws-network" {
-# AWS Networking
+  source            = "./modules/aws-network"
-# Use of the 2 modules below to create resources for the AWS network.
+  name-prefix       = var.vm-name-prefix
-# aws-network-from-scratch will build the AWS network from scratch.
+  vpc-cidr-block    = var.aws-vpc-cidr-block
-# aws-network-existing will query AWS for an existing VPC.
+  subnet-cidr-block = var.aws-subnet-cidr-block
-################################################################################
+  admin-ips         = var.admin-ips
-
-# module "aws-network-from-scratch" {
-#   source            = "./modules/aws-network-from-scratch"
-#   name-prefix       = var.vm-name-prefix
-#   vpc-cidr-block    = var.aws-vpc-cidr-block
-#   subnet-cidr-block = var.aws-subnet-cidr-block
-#   admin-ips         = var.admin-ips
-# }
-
-module "aws-network-existing" {
-  source = "./modules/aws-network-existing"
 }
 
-################################################################################
-
 # This key pair is not actually used. Keys are added to the nodes via cloud-init
 # instead. We just add this here that this key will show up in the AWS console."
 resource "aws_key_pair" "key" {
@@ -108,9 +126,7 @@ module "nodes" {
 #   num-nodes              = each.value.num
 #   node-memory            = var.node-memory
 #   node-vcpus             = var.node-vcpus
-#   node-disk-size         = var.libvirt-node-disk-size
 #   base-image             = each.value.base-image
-#   network-name           = var.libvirt-network-name
 #   root-admin-passwd      = var.root-admin-passwd
 #   root-admin-pub-key     = var.root-admin-pub-key
 #   libvirt-connection-url = var.libvirt-connection-url
@@ -127,8 +143,6 @@ module "nodes" {
 # end libvirt
 ################################################################################
 
-# This will output a map of group => [{hostname, ip}].
+output "ips" {
-# TODO A 'names' output needs to be added to libvirt.
+  value = { for type, node in module.nodes : type => node.ips }
-output "groups_hostnames_ips" {
-  value = { for type, node in module.nodes : type => zipmap(node.names, node.ips) }
 }

modules/aws-network-existing/main.tf

@@ -1,23 +0,0 @@
-locals {
-  az-to-subnets = {
-    for s in data.aws_subnet.subnets : s.availability_zone => s.id...
-  }
-}
-
-data "aws_vpc" "default" {
-  tags = {
-    Name = var.default-vpc-name
-  }
-}
-
-data "aws_subnets" "subnet-ids" {
-  filter {
-    name = "vpc-id"
-    values = [data.aws_vpc.default.id]
-  }
-}
-
-data "aws_subnet" "subnets" {
-  for_each = toset(data.aws_subnets.subnet-ids.ids)
-  id = each.key
-}

modules/aws-network-existing/outputs.tf

@@ -1,18 +0,0 @@
-output "default-vpc" {
-  value = data.aws_vpc.default
-}
-
-output "subnets" {
-  description = "An array of all subnets in default-vpc."
-  value = data.aws_subnet.subnets
-}
-
-output "k8s-subnets" {
-  description = "An array of subnets to be used for k8s VMs. These subnets were chosen by selecting a single subnet from each availability_zone."
-  value = [for k,v in local.az-to-subnets : v[0]]
-}
-
-output "az-to-subnets" {
-  description = "A map of availability zone to array of subnets that are in thet availability zone."
-  value = local.az-to-subnets
-}

modules/aws-network-existing/variables.tf

@@ -1,4 +0,0 @@
-variable "default-vpc-name" {
-  description = "The name of the existing default VPC. This module will query AWS for a VPC with this name,"
-  default = "Managed VPC"
-}

modules/aws-network/main.tf

@@ -33,7 +33,7 @@ resource "aws_default_security_group" "sg" {
   }
 
   tags = {
-    Name = "${var.name-prefix}-ssh-from-admins-sg"
+    Name = "${var.name-prefix}-ssh-from-admins--sg"
   }
 }
 

modules/aws-nodes/main.tf

@@ -1,7 +1,6 @@
 resource "aws_instance" "nodes" {
   ami                         = var.ami
   instance_type               = var.ec2-instance-type
-  # TODO REM double check this key.
   # key_name                    = aws_key_pair.debug1.key_name
   associate_public_ip_address = true
   subnet_id                   = var.subnet-id

modules/aws-nodes/outputs.tf

@@ -1,7 +1,3 @@
 output "ips" {
   value = aws_instance.nodes.*.public_ip
 }
-
-output "names" {
-  value = aws_instance.nodes.*.tags.Name
-}

modules/cloud-init-config/main.tf

@@ -1,10 +1,9 @@
 data "template_file" "user-datas" {
   template = file("${var.cloud-init-template}")
   vars = {
-    admin-passwd       = "${var.root-admin-passwd}"
+    admin-passwd  = "${var.root-admin-passwd}"
-    admin-pub-key      = "${var.root-admin-pub-key}"
+    admin-pub-key = "${var.root-admin-pub-key}"
-    hostname           = "${var.hostname-prefix}-${count.index}"
+    hostname      = "${var.hostname-prefix}-${count.index}"
-    install-qemu-agent = var.install-qemu-agent
   }
   count = var.num
 }

modules/cloud-init-config/variables.tf

@@ -8,12 +8,6 @@ variable "hostname-prefix" {
   description = "This prefix wil be applied as a prefix for the hostnames."
 }
 
-variable "install-qemu-agent" {
-  default     = false
-  description = "This flag determines whether or not qemu-agent is installed."
-  type        = bool
-}
-
 variable "num" {
   description = "The number of user-datas to create with these parameters."
 }

modules/libvirt-nodes/main.tf

@@ -9,20 +9,13 @@ terraform {
 }
 
 resource "libvirt_volume" "node-images" {
-  name   = "${var.name-prefix}-base"
+  name   = "${var.name-prefix}-${count.index}"
   pool   = var.pool-name
   source = var.base-image
+  count  = var.num-nodes
   format = "qcow2"
 }
 
-resource "libvirt_volume" "node-images-resized" {
-  name           = "${var.name-prefix}-${count.index}-resized"
-  pool           = var.pool-name
-  base_volume_id = libvirt_volume.node-images.id
-  count          = var.num-nodes
-  size           = var.node-disk-size
-}
-
 data "template_file" "network-config" {
   template = file("${path.module}/network_config.cfg")
 }
@@ -44,9 +37,9 @@ resource "libvirt_domain" "nodes" {
   cloudinit = element(libvirt_cloudinit_disk.node-inits.*.id, count.index)
 
   network_interface {
-    network_name   = var.network-name
+    network_name   = "default"
     hostname       = "${var.name-prefix}-${count.index}"
-    # wait_for_lease = true
+    wait_for_lease = true
   }
 
   # IMPORTANT: this is a known bug on cloud images, since they expect a console
@@ -65,7 +58,7 @@ resource "libvirt_domain" "nodes" {
   }
 
   disk {
-    volume_id = element(libvirt_volume.node-images-resized.*.id, count.index)
+    volume_id = element(libvirt_volume.node-images.*.id, count.index)
   }
 
   graphics {

modules/libvirt-nodes/outpus.tf

@@ -1,6 +1,4 @@
 
-# This only works on the default network. They will not work using the bridged
+output "ips" {
-# network.
+  value = libvirt_domain.nodes.*.network_interface.0.addresses.0
-# output "ips" {
+}
-#   value = libvirt_domain.nodes.*.network_interface.0.addresses.0
-# }

modules/libvirt-nodes/variables.tf

@@ -12,16 +12,6 @@ variable "name-prefix" {
   description = "This will be a prefix for all resource names, ie. domains will be created suck as \"k8s-node-2\"."
 }
 
-variable "network-name" {
-  default = "default"
-  description = "The name of a pre-existing virtual-network."
-}
-
-variable "node-disk-size" {
-  default = 4294967296
-  description = "The size of the disk to be used for libvirt nodes. (in bytes)"
-}
-
 variable "node-memory" {
   default     = "2048"
   description = "The amount of memory to be used for all the nodes."

providers.tf

@@ -1,76 +0,0 @@
-
-provider "aws" {
-  region = "us-gov-west-1"
-}
-
-
-terraform {
-  required_version = ">= 1.0.8"
-
-    backend "s3" {
-      
-      bucket            = "mss-terraform-state"
-      key               = "global/s3/terraform.tfstate"
-      region            = "us-gov-west-1"
-      
-      dynamodb_table    = "mss-terraform-state-lock"
-      encrypt           = true
-
-  }
-  required_providers {
-    libvirt = {
-      source  = "dmacvicar/libvirt"
-      version = "0.6.11"
-    }
-  }
-}
-
-
-
-
-
-##
-#S3 bucket create to hold our TFState file so we can all share env settings
-resource "aws_s3_bucket" "terraform_state" {
-    bucket = "mss-terraform-state"
-
-    # enable versioning for the state files 
-    versioning {
-        enabled = true
-    }
-
-    #enable server-side encryption
-    server_side_encryption_configuration {
-      
-      rule {
-          apply_server_side_encryption_by_default {
-              sse_algorithm = "AES256"
-              }
-          }
-        } 
-}
-
-##
-# no sql database used so that we can lock the TFstate file in the S3 bucket to ensure two people 
-# are not running a terraform command at the same time 
-resource "aws_dynamodb_table" "terraform_locks" {
-    name            = "mss-terraform-state-lock"
-    billing_mode    = "PAY_PER_REQUEST"
-    hash_key        = "LockID"
-
-    attribute {
-      name = "LockID"
-      type = "S"
-    }
-
-
-}
-
-
-##
-# output variable to give details on the s3 bucket created
-#TODO: move to output.tf
-output "s3_bucket_arn" {
-  value       = aws_s3_bucket.terraform_state.arn
-  description = "The ARN of the S3 bucket"
-}

variables.tf

@@ -8,11 +8,6 @@ variable "aws-ec2-instance-type" {
   description = "The AWS instance type to use for all nodes."
 }
 
-variable "aws-region" {
-  default = "us-east-1"
-  description = "The AWS region to use."
-}
-
 variable "aws-subnet-cidr-block" {
   default = "10.0.1.0/24"
   description = "The address space to be used for this subnet."
@@ -36,16 +31,6 @@ variable "libvirt-connection-url" {
   description = "The libvirt connection URI, ie. qemu+ssh://<user>@<host>/system"
 }
 
-variable "libvirt-network-name" {
-  default = "default"
-  description = "The name of a pre-existing libvirt virtual-network."
-}
-
-variable "libvirt-node-disk-size" {
-  default = 4294967296
-  description = "The size of the disk to be used for libvirt nodes. (in bytes)"
-}
-
 variable "node-memory" {
   default     = "2048"
   description = "The amount of memory to be used for all the nodes."
@@ -122,25 +107,3 @@ variable "rhel8-ami" {
   default = "ami-0d871ca8a77af2948"
   description = "The AMI to use for RHEL 8."
 }
-
-################################################################################
-# Libvirt Images
-# These variables are really mor like constants. Using variables improves
-# readability. The defaults are manually updated.
-################################################################################
-
-variable "ubuntu-img" {
-  default     = "https://cloud-images.ubuntu.com/releases/focal/release/ubuntu-20.04-server-cloudimg-amd64-disk-kvm.img"
-  description = "The libvirt image tp use for Ubuntu."
-}
-
-variable "centos7-img" {
-  # Latest as of 2021-12-06.
-  default = "https://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud-2111.qcow2"
-  description = "The libvirt image tp use for CentOS 7."
-}
-
-variable "centos8-img" {
-  default = "https://cloud.centos.org/centos/8/x86_64/images/CentOS-8-GenericCloud-8.4.2105-20210603.0.x86_64.qcow2"
-  description = "The libvirt image tp use for CentOS 8."
-}