feat(module): adding virtualMachine module

This module gives you the ability to create virual machines on
OpenNebula

Extracted from "Cadoles v2 Production project"

modules/virtualMachine/main.tf

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+// Dependencies management
+resource "null_resource" "depends_on" {
+  triggers = {
+    depends_on = join("", var.depends)
+  }
+}
+
+// OpenNebula disk image !
+resource "opennebula_image" "system" {
+    name = var.system_image_name
+    description = "System disk image"
+    datastore_id = var.one_prod_ds 
+    persistent = false
+    //lock = "MANAGE"
+    path = var.system_image_source 
+    dev_prefix = "vd"
+    driver = "qcow2"
+    format = "qcow2"
+    permissions = var.imagemode
+    group = var.group  
+}
+
+resource "opennebula_image" "data" {
+    name = var.data_image_name
+    description = "Data disk image"
+    datastore_id = var.one_prod_ds 
+    persistent = true
+    //lock = "MANAGE"
+    path = var.data_image_source
+    dev_prefix = "vd"
+    driver = "qcow2"
+    format = "qcow2"
+    permissions = "660"
+    group = "production"  
+}
+
+// OpenNebula (VM) Template definition
+resource "opennebula_template" "vm_template" {
+  name = var.vm_shortname
+  cpu = var.cpu
+  vcpu = var.vcpu
+  memory = var.ram
+  graphics {
+    keymap = var.graphics.keymap
+    listen = var.graphics.listen
+    type = var.graphics.type
+  }
+  context = {
+    SET_HOSTNAME = "$NAME"
+    DNS_HOSTNAME = "YES"
+    NETWORK = "YES"
+    SSH_PUBLIC_KEY = "$USER[SSH_PUBLIC_KEY]"
+    USERNAME = "root"
+  }
+  disk {
+    image_id = opennebula_image.system.id
+  }
+  disk {
+    image_id = opennebula_image.data.id
+  }
+
+  //labels = var.tag_labels
+
+  dynamic "nic" {
+    for_each = var.network_interfaces
+
+    content {
+      network_id = nic.value.network_id
+      model = "virtio"
+      ip = nic.value.ip
+    }
+  }
+  permissions = "600"
+  group = var.group
+  depends_on = [ opennebula_image.system,
+                 opennebula_image.data ]
+}
+
+// OpenNebula Virtual Machine
+resource "opennebula_virtual_machine" "vm" {
+  name = var.vm_fqdn
+  group = var.group
+  timeout = 10
+  template_id = opennebula_template.vm_template.id
+  depends_on = [ opennebula_template.vm_template,
+                 null_resource.depends_on ]
+}
+
+resource "dns_a_record_set" "vm_dns_a_record" {    
+  count = var.dns_a_record == "yes" ? 1 : 0
+
+  zone = var.vm_domain
+  name = var.vm_shortname
+  ttl = 300
+
+  addresses = [ var.network_interfaces[0].ip ]
+  depends_on = [ opennebula_virtual_machine.vm ]
+}
+
+resource "dns_cname_record" "vm_dns_cname_record" {    
+  for_each = var.dns_cname_record
+
+  zone  = var.vm_domain 
+  name  = each.value
+  cname = "${var.vm_fqdn}."
+  ttl   = 300
+
+  depends_on = [ opennebula_virtual_machine.vm ]
+}

modules/virtualMachine/outputs.tf

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+output "virtual_machine_shortname" {
+  value = opennebula_virtual_machine.vm.name
+}
+
+output "virtual_machine_nic0_mac" {
+  value = opennebula_virtual_machine.vm.nic[0].mac
+}
+
+output "network_interfaces" {
+    value = var.network_interfaces
+}

modules/virtualMachine/variables.tf

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+variable "one_user" {
+  description = "OpenNebula user"
+  type = string
+}
+
+variable "one_prod_ds" {
+  description = "ID du Datastore de production"
+  type = string
+}
+
+variable "vm_fqdn" {
+  description = "Virtual Machine FQDN Name"
+  type = string
+}
+
+variable "vm_shortname" {
+  description = "Virtual machine short name"
+  type = string
+}
+
+variable "vm_domain" {
+  description = "Full qualified dns domain name"
+  type = string
+}
+
+variable "system_image_name" {
+  description = "System image disk name"
+  type = string
+}
+
+variable "system_image_source" {
+  description = "Virtual Machine system image source"
+  type = string
+}
+
+variable "data_image_name" {
+  description = "Data image disk name"
+  type = string
+}
+
+variable "data_image_source" {
+  description = "Virtual Machine data disk image source"
+  type = string
+}
+
+variable "tag_labels" {
+  description = "Labels"
+  type = string
+}
+
+variable "network_interfaces" {
+  description = "Network interfaces"
+  type = list
+}
+
+variable "cpu" {
+  description = "VM CPU"
+  type = string
+}
+
+variable "vcpu" {
+  description = "VM vCPU"
+  type = string
+}
+
+variable "ram" {
+  description = "VM RAM"
+  type = string
+}
+
+variable "depends" {
+  description = "List of output_variables for dependences management"
+  type = list
+  default = []
+}
+
+variable "dns_a_record" {
+  description = "Create a dns A record (yes/no)"
+  type = string
+  default = "no"
+}
+
+variable "dns_cname_record" {
+  description =  "List of CNAME for A entry"
+  type = map(string)
+  default = {}
+}
+
+variable "group" {
+  description = "Group (owner group)"
+  type = string
+  default = "production"
+}
+
+variable "graphics" {
+  description = "Graphics declaration"
+  type = map(string)
+  default = {
+    keymap = "fr"
+    listen = "0.0.0.0"
+    type = "VNC"
+  }
+  
+}

modules/virtualMachine/versions.tf

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+terraform {
+  required_providers {
+    dns = {
+      source = "hashicorp/dns"
+    }
+    null = {
+      source = "hashicorp/null"
+    }
+    opennebula = {
+      source = "terraform-providers/opennebula"
+    }
+  }
+  required_version = ">= 0.13"
+}