libvirt bridged network interface

- Added support for libvirt VMs that use a bridged network interface.

modules/libvirt-nodes/main.tf

@@ -9,13 +9,20 @@ terraform {
 }
 
 resource "libvirt_volume" "node-images" {
-  name   = "${var.name-prefix}-${count.index}"
+  name   = "${var.name-prefix}-base"
   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")
 }
@@ -37,9 +44,9 @@ resource "libvirt_domain" "nodes" {
   cloudinit = element(libvirt_cloudinit_disk.node-inits.*.id, count.index)
 
   network_interface {
-    network_name   = "default"
+    network_name   = var.network-name
     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
@@ -58,7 +65,7 @@ resource "libvirt_domain" "nodes" {
   }
 
   disk {
-    volume_id = element(libvirt_volume.node-images.*.id, count.index)
+    volume_id = element(libvirt_volume.node-images-resized.*.id, count.index)
   }
 
   graphics {

modules/libvirt-nodes/outpus.tf

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

modules/libvirt-nodes/variables.tf

@@ -12,6 +12,16 @@ 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."