Merge pull request #1241 from mkorobeinikov/master

the article about Terraform

3 files changed, 1037 insertions, 0 deletions

diff --git a/docs/_static/images/aws.png b/docs/_static/images/aws.png
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index 00000000..c1c111bb
--- /dev/null
+++ b/docs/_static/images/aws.png
diff --git a/docs/automation/index.rst b/docs/automation/index.rst
index ee8282ac..ecabff7a 100644
--- a/docs/automation/index.rst
+++ b/docs/automation/index.rst
@@ -12,6 +12,7 @@ VyOS Automation
    
    vyos-api
    vyos-ansible
+   vyos-terraform
    vyos-napalm
    vyos-netmiko
    vyos-salt
diff --git a/docs/automation/vyos-terraform.rst b/docs/automation/vyos-terraform.rst
new file mode 100644
index 00000000..75967202
--- /dev/null
+++ b/docs/automation/vyos-terraform.rst
@@ -0,0 +1,1036 @@
+:lastproofread: 2024-01-11
+
+.. _vyos-terraform:
+
+Terraform
+=========
+
+VyOS supports develop infrastructia via Terraform and provisioning via ansible.
+Need to install ``Terraform``
+
+Structure of files
+
+.. code-block:: none
+
+ .
+ ├── main.tf
+ ├── version.tf
+ ├── variables.tf
+ └── terraform.tfvars
+
+Run Terraform
+-------------
+
+.. code-block:: none
+
+  #cd /your folder
+  #terraform init
+  #terraform plan
+  #terraform apply
+  #yes
+
+
+Deploying vyos in the AWS cloud
+-------------------------------
+With the help of terraforms, you can quickly deploy Vyos-based infrastructure in the AWS cloud. If necessary, the infrastructure can be removed using terraform.
+Also we will make provisioning using Ansible.
+
+Structure of files Terrafom
+
+.. code-block:: none
+
+ .
+ ├── vyos.tf
+ └── var.tf
+ 
+File contents
+-------------
+
+vyos.tf
+
+.. code-block:: none
+
+  terraform {
+   required_providers {
+     aws = {
+       source  = "hashicorp/aws"
+       version = "~> 5.0"
+     }
+   }
+  }
+  
+  provider "aws" {
+   access_key = var.access 
+   secret_key = var.secret 
+   region = var.region
+  }
+  
+  variable "region" {
+   default = "us-east-1"
+   description = "AWS Region"
+  }
+  
+  variable "ami" {
+   default = "ami-**************"                        # ami image please enter your details  
+   description = "Amazon Machine Image ID for VyOS"
+  }
+  
+  variable "type" {
+   default = "t2.micro"
+   description = "Size of VM"
+  }
+  
+  # my resource for VyOS
+  
+  resource "aws_instance" "myVyOSec2" {
+   ami = var.ami
+   key_name = "mykeyname"                                # Please enter your details  
+   security_groups = ["my_sg"]                           # Please enter your details  
+   instance_type = var.type
+   tags = {
+     name = "VyOS System"
+   }
+  }
+  
+  output "my_IP"{
+  value = aws_instance.myVyOSec2.public_ip
+  }
+  
+  
+  #IP of aws instance copied to a file ip.txt in local system Terraform
+  
+  resource "local_file" "ip" {
+      content  = aws_instance.myVyOSec2.public_ip
+      filename = "ip.txt"
+  }
+  
+  #connecting to the Ansible control node using SSH connection
+  
+  resource "null_resource" "SSHconnection1" {
+  depends_on = [aws_instance.myVyOSec2] 
+  connection {
+   type     = "ssh"
+   user     = "root"
+   password = var.password
+       host = var.host
+  }
+  #copying the ip.txt file to the Ansible control node from local system 
+   provisioner "file" {
+      source      = "ip.txt"
+      destination = "/root/aws/ip.txt"                             # The folder of your Ansible project
+         }
+  }
+  
+  resource "null_resource" "SSHconnection2" {
+  depends_on = [aws_instance.myVyOSec2]  
+  connection {
+  	type     = "ssh"
+  	user     = "root"
+  	password = var.password
+      	host = var.host
+  }
+  #command to run Ansible playbook on remote Linux OS
+  provisioner "remote-exec" {
+      inline = [
+  	"cd /root/aws/",
+  	"ansible-playbook instance.yml"
+  ]
+  }
+  }
+
+
+var.tf
+
+.. code-block:: none
+
+  variable "password" {
+     description = "pass for Ansible"
+     type = string
+     sensitive = true
+  }
+  variable "host"{
+     description = "The IP of my Ansible"
+  }
+  variable "access" {
+     description = "my access_key for AWS"
+     type = string
+     sensitive = true
+  }
+  variable "secret" {
+     description = "my secret_key for AWS"
+     type = string
+     sensitive = true
+  }
+
+
+Structure of files Ansible
+
+.. code-block:: none
+
+ .
+ ├── group_vars
+     └── all
+ ├── ansible.cfg
+ ├── mykey.pem
+ └── instance.yml
+ 
+ 
+File contents
+-------------
+
+ansible.cfg
+
+.. code-block:: none
+
+  [defaults]
+  inventory = /root/aws/ip.txt
+  host_key_checking= False
+  private_key_file = /root/aws/mykey.pem
+  remote_user=vyos
+
+mykey.pem
+
+.. code-block:: none
+
+  -----BEGIN OPENSSH PRIVATE KEY-----
+  
+  Copy your key.pem from AWS
+  
+  -----END OPENSSH PRIVATE KEY-----
+
+instance.yml
+
+.. code-block:: none
+
+  - name: integration of terraform and ansible
+    hosts: all
+    gather_facts: 'no'
+  
+    tasks:
+  
+      - name: "Wait 300 seconds, but only start checking after 60 seconds"
+        wait_for_connection:
+          delay: 60
+          timeout: 300
+  
+      - name: "Configure general settings for the vyos hosts group"
+        vyos_config:
+          lines:
+            - set system name-server 8.8.8.8
+          save:
+            true
+
+
+all
+
+.. code-block:: none
+
+  ansible_connection: ansible.netcommon.network_cli
+  ansible_network_os: vyos.vyos.vyos
+  ansible_user: vyos
+
+AWS_terraform_ansible_single_vyos_instance
+------------------------------------------
+
+How to create a single instance and install your configuration using Terraform+Ansible+AWS 
+Step by step:
+
+AWS
+---
+
+1.1 Create an account with AWS and get your "access_key", "secret key"
+
+1.2 Create a key pair and download your .pem key
+
+1.3 Create a security group for the new VyOS instance
+
+Terraform
+---------
+
+2.1 Create a UNIX or Windows instance
+
+2.2 Download and install Terraform
+
+2.3 Create the folder for example ../awsvyos/
+
+2.4 Copy all files into your Terraform project (vyos.tf, var.tf)
+2.4.1 Please type the information into the strings 22, 35, 36 of file "vyos.tf"
+
+2.5 Type the commands :
+
+   #cd /your folder
+   
+   #terraform init
+
+Ansible
+-------
+
+3.1 Create a UNIX instance
+
+3.2 Download and install Ansible
+
+3.3 Create the folder for example /root/aws/
+
+3.4 Copy all files from my folder /Ansible into your Ansible project (ansible.cfg, instance.yml, mykey.pem)
+
+mykey.pem you have to get using step 1.2
+
+Start 
+-----
+
+4.1 Type the commands on your Terrafom instance:
+   
+   #cd /your folder 
+
+   #terraform plan  
+
+   #terraform apply  
+   
+   #yes
+
+.. image:: /_static/images/aws.png
+   :width: 80%
+   :align: center
+   :alt: Network Topology Diagram
+
+
+
+Deploying vyos in the Azure cloud
+---------------------------------
+With the help of terraforms, you can quickly deploy Vyos-based infrastructure in the Azure cloud. If necessary, the infrastructure can be removed using terraform.
+
+Structure of files Terrafom
+
+.. code-block:: none
+
+ .
+ ├── main.tf
+ └── variables.tf
+ 
+File contents
+-------------
+
+main.tf
+
+.. code-block:: none
+
+  ##############################################################################
+  # HashiCorp Guide to Using Terraform on Azure
+  # This Terraform configuration will create the following:
+  # Resource group with a virtual network and subnet
+  # An VyOS server without ssh key (only login+password)
+  ##############################################################################
+  
+  # Chouse a provider
+  
+  provider "azurerm" {
+    features {}
+  }
+  
+  # Create a resource group. In Azure every resource belongs to a 
+  # resource group. 
+  
+  resource "azurerm_resource_group" "azure_vyos" {
+    name     = "${var.resource_group}"
+    location = "${var.location}"
+  }
+  
+  # The next resource is a Virtual Network.
+  
+  resource "azurerm_virtual_network" "vnet" {
+    name                = "${var.virtual_network_name}"
+    location            = "${var.location}"
+    address_space       = ["${var.address_space}"]
+    resource_group_name = "${var.resource_group}"
+  }
+  
+  # Build a subnet to run our VMs in.
+  
+  resource "azurerm_subnet" "subnet" {
+    name                 = "${var.prefix}subnet"
+    virtual_network_name = "${azurerm_virtual_network.vnet.name}"
+    resource_group_name = "${var.resource_group}"
+    address_prefixes       = ["${var.subnet_prefix}"]
+  }
+  
+  ##############################################################################
+  # Build an VyOS VM from the Marketplace
+  # To finde nessesery image use the command:
+  #
+  # az vm image list --offer vyos --all
+  #
+  # Now that we have a network, we'll deploy an VyOS server.
+  # An Azure Virtual Machine has several components. In this example we'll build
+  # a security group, a network interface, a public ip address, a storage 
+  # account and finally the VM itself. Terraform handles all the dependencies 
+  # automatically, and each resource is named with user-defined variables.
+  ##############################################################################
+  
+  
+  # Security group to allow inbound access on port 22 (ssh)
+  
+  resource "azurerm_network_security_group" "vyos-sg" {
+    name                = "${var.prefix}-sg"
+    location            = "${var.location}"
+    resource_group_name = "${var.resource_group}"
+  
+    security_rule {
+      name                       = "SSH"
+      priority                   = 100
+      direction                  = "Inbound"
+      access                     = "Allow"
+      protocol                   = "Tcp"
+      source_port_range          = "*"
+      destination_port_range     = "22"
+      source_address_prefix      = "${var.source_network}"
+      destination_address_prefix = "*"
+    }
+  }
+  
+  # A network interface.
+  
+  resource "azurerm_network_interface" "vyos-nic" {
+    name                      = "${var.prefix}vyos-nic"
+    location                  = "${var.location}"
+    resource_group_name       = "${var.resource_group}"
+  
+    ip_configuration {
+      name                          = "${var.prefix}ipconfig"
+      subnet_id                     = "${azurerm_subnet.subnet.id}"
+      private_ip_address_allocation = "Dynamic"
+      public_ip_address_id          = "${azurerm_public_ip.vyos-pip.id}"
+    }
+  }
+  
+  # Add a public IP address.
+  
+  resource "azurerm_public_ip" "vyos-pip" {
+    name                         = "${var.prefix}-ip"
+    location                     = "${var.location}"
+    resource_group_name          = "${var.resource_group}"
+    allocation_method            = "Dynamic"
+  }
+  
+  # Build a virtual machine. This is a standard VyOS instance from Marketplace.
+  
+  resource "azurerm_virtual_machine" "vyos" {
+    name                = "${var.hostname}-vyos"
+    location            = "${var.location}"
+    resource_group_name = "${var.resource_group}" 
+    vm_size             = "${var.vm_size}"
+  
+    network_interface_ids         = ["${azurerm_network_interface.vyos-nic.id}"]
+    delete_os_disk_on_termination = "true"
+  
+  # To finde an information about the plan use the command:
+  # az vm image list --offer vyos --all
+  
+    plan {
+      publisher = "sentriumsl"
+      name      = "vyos-1-3"
+      product   = "vyos-1-2-lts-on-azure"
+    }
+  
+    storage_image_reference {
+      publisher = "${var.image_publisher}"
+      offer     = "${var.image_offer}"
+      sku       = "${var.image_sku}"
+      version   = "${var.image_version}"
+    }
+  
+    storage_os_disk {
+      name              = "${var.hostname}-osdisk"
+      managed_disk_type = "Standard_LRS"
+      caching           = "ReadWrite"
+      create_option     = "FromImage"
+    }
+  
+    os_profile {
+      computer_name  = "${var.hostname}"
+      admin_username = "${var.admin_username}"
+      admin_password = "${var.admin_password}"
+    }
+  
+    os_profile_linux_config {
+      disable_password_authentication = false
+    }
+  }
+  
+  data "azurerm_public_ip" "example" {
+    depends_on = ["azurerm_virtual_machine.vyos"]
+    name                = "vyos-ip"
+    resource_group_name = "${var.resource_group}"
+  }
+  output "public_ip_address" {
+    value = data.azurerm_public_ip.example.ip_address
+  }
+  
+  # IP of AZ instance copied to a file ip.txt in local system
+  
+  resource "local_file" "ip" {
+      content  = data.azurerm_public_ip.example.ip_address
+      filename = "ip.txt"
+  }
+  
+  #Connecting to the Ansible control node using SSH connection
+  
+  resource "null_resource" "nullremote1" {
+  depends_on = ["azurerm_virtual_machine.vyos"] 
+  connection {
+   type     = "ssh"
+   user     = "root"
+   password = var.password
+       host = var.host
+  }
+  
+  # Copying the ip.txt file to the Ansible control node from local system 
+  
+   provisioner "file" {
+      source      = "ip.txt"
+      destination = "/root/az/ip.txt"
+         }
+  }
+  
+  resource "null_resource" "nullremote2" {
+  depends_on = ["azurerm_virtual_machine.vyos"]  
+  connection {
+  	type     = "ssh"
+  	user     = "root"
+  	password = var.password
+      	host = var.host
+  }
+  
+  # Command to run ansible playbook on remote Linux OS
+  
+  provisioner "remote-exec" {
+      
+      inline = [
+  	"cd /root/az/",
+  	"ansible-playbook instance.yml"
+  ]
+  }
+  }
+
+
+
+variables.tf
+
+.. code-block:: none
+
+  ##############################################################################
+  # Variables File
+  # 
+  # Here is where we store the default values for all the variables used in our
+  # Terraform code.
+  ##############################################################################
+  
+  variable "resource_group" {
+    description = "The name of your Azure Resource Group."
+    default     = "my_resource_group"
+  }
+  
+  variable "prefix" {
+    description = "This prefix will be included in the name of some resources."
+    default     = "vyos"
+  }
+  
+  variable "hostname" {
+    description = "Virtual machine hostname. Used for local hostname, DNS, and storage-related names."
+    default     = "vyos_terraform"
+  }
+  
+  variable "location" {
+    description = "The region where the virtual network is created."
+    default     = "centralus"
+  }
+  
+  variable "virtual_network_name" {
+    description = "The name for your virtual network."
+    default     = "vnet"
+  }
+  
+  variable "address_space" {
+    description = "The address space that is used by the virtual network. You can supply more than one address space. Changing this forces a new resource to be created."
+    default     = "10.0.0.0/16"
+  }
+  
+  variable "subnet_prefix" {
+    description = "The address prefix to use for the subnet."
+    default     = "10.0.10.0/24"
+  }
+  
+  variable "storage_account_tier" {
+    description = "Defines the storage tier. Valid options are Standard and Premium."
+    default     = "Standard"
+  }
+  
+  variable "storage_replication_type" {
+    description = "Defines the replication type to use for this storage account. Valid options include LRS, GRS etc."
+    default     = "LRS"
+  }
+  
+  # The most chippers size
+  
+  variable "vm_size" {
+    description = "Specifies the size of the virtual machine."
+    default     = "Standard_B1s"
+  }
+  
+  variable "image_publisher" {
+    description = "Name of the publisher of the image (az vm image list)"
+    default     = "sentriumsl"
+  }
+  
+  variable "image_offer" {
+    description = "Name of the offer (az vm image list)"
+    default     = "vyos-1-2-lts-on-azure"
+  }
+  
+  variable "image_sku" {
+    description = "Image SKU to apply (az vm image list)"
+    default     = "vyos-1-3"
+  }
+  
+  variable "image_version" {
+    description = "Version of the image to apply (az vm image list)"
+    default     = "1.3.3"
+  }
+  
+  variable "admin_username" {
+    description = "Administrator user name"
+    default     = "vyos"
+  }
+  
+  variable "admin_password" {
+    description = "Administrator password"
+    default     = "Vyos0!"
+  }
+  
+  variable "source_network" {
+    description = "Allow access from this network prefix. Defaults to '*'."
+    default     = "*"
+  }
+  
+  variable "password" {
+     description = "pass for Ansible"
+     type = string
+     sensitive = true
+  }
+  variable "host"{
+     description = "IP of my Ansible"
+  }
+
+
+Structure of files Ansible
+
+.. code-block:: none
+
+ .
+ ├── group_vars
+     └── all
+ ├── ansible.cfg
+ └── instance.yml
+ 
+ 
+File contents
+-------------
+
+ansible.cfg
+
+.. code-block:: none
+
+  [defaults]
+  inventory = /root/az/ip.txt
+  host_key_checking= False
+  remote_user=vyos
+
+
+instance.yml
+
+.. code-block:: none
+
+  - name: integration of terraform and ansible
+    hosts: all
+    gather_facts: 'no'
+  
+    tasks:
+  
+      - name: "Wait 300 seconds, but only start checking after 60 seconds"
+        wait_for_connection:
+          delay: 60
+          timeout: 300
+  
+      - name: "Configure general settings for the vyos hosts group"
+        vyos_config:
+          lines:
+            - set system name-server 8.8.8.8
+          save:
+            true
+
+
+all
+
+.. code-block:: none
+
+  ansible_connection: ansible.netcommon.network_cli
+  ansible_network_os: vyos.vyos.vyos
+  
+  # user and password gets from terraform variables "admin_username" and "admin_password"
+  ansible_user: vyos
+  ansible_ssh_pass: Vyos0!
+
+
+Azure_terraform_ansible_single_vyos_instance
+--------------------------------------------
+
+How to create a single instance and install your configuration using Terraform+Ansible+Azure 
+Step by step:
+
+Azure
+-----
+
+1.1 Create an account with Azure
+
+Terraform
+---------
+
+2.1 Create a UNIX or Windows instance
+
+2.2 Download and install Terraform
+
+2.3 Create the folder for example ../azvyos/
+
+2.4 Copy all files from my folder /Terraform into your Terraform project (main.tf, variables.tf)
+
+2.5 Login with Azure  using the command 
+
+  #az login
+
+2.6 Type the commands :
+
+   #cd /your folder
+   
+   #terraform init
+
+Ansible
+-------
+
+3.1 Create a UNIX instance
+
+3.2 Download and install Ansible
+
+3.3 Create the folder for example /root/az/
+
+3.4 Copy all files from my folder /Ansible into your Ansible project (ansible.cfg, instance.yml and /group_vars)
+
+Start 
+-----
+
+4.1 Type the commands on your Terrafom instance:
+   
+   #cd /your folder 
+
+   #terraform plan  
+
+   #terraform apply  
+   
+   #yes
+
+
+
+Deploying vyos in the Vsphere infrastructia
+-------------------------------------------
+With the help of terraforms, you can quickly deploy Vyos-based infrastructure in the vSphere.
+
+Structure of files Terrafom
+
+.. code-block:: none
+
+ .
+ ├── main.tf
+ ├── versions.tf
+ ├── variables.tf
+ └── terraform.tfvars
+ 
+File contents
+-------------
+
+main.tf
+
+.. code-block:: none
+
+  provider "vsphere" {
+    user           = var.vsphere_user
+    password       = var.vsphere_password
+    vsphere_server = var.vsphere_server
+    allow_unverified_ssl = true
+  }
+  
+  data "vsphere_datacenter" "datacenter" {
+    name = var.datacenter
+  }
+  
+  data "vsphere_datastore" "datastore" {
+    name          = var.datastore
+    datacenter_id = data.vsphere_datacenter.datacenter.id
+  }
+  
+  data "vsphere_compute_cluster" "cluster" {
+    name          = var.cluster
+    datacenter_id = data.vsphere_datacenter.datacenter.id
+  }
+  
+  data "vsphere_resource_pool" "default" {
+    name          = format("%s%s", data.vsphere_compute_cluster.cluster.name, "/Resources/terraform")  # set as you need
+    datacenter_id = data.vsphere_datacenter.datacenter.id
+  }
+  
+  data "vsphere_host" "host" {
+    name          = var.host
+    datacenter_id = data.vsphere_datacenter.datacenter.id
+  }
+  
+  data "vsphere_network" "network" {
+    name          = var.network_name
+    datacenter_id = data.vsphere_datacenter.datacenter.id
+  }
+  
+  ## Deployment of VM from Remote OVF
+  resource "vsphere_virtual_machine" "vmFromRemoteOvf" {
+    name                 = var.remotename
+    datacenter_id        = data.vsphere_datacenter.datacenter.id
+    datastore_id         = data.vsphere_datastore.datastore.id
+    host_system_id       = data.vsphere_host.host.id
+    resource_pool_id     = data.vsphere_resource_pool.default.id
+    network_interface {
+      network_id = data.vsphere_network.network.id
+    }
+    wait_for_guest_net_timeout = 2
+    wait_for_guest_ip_timeout  = 2
+  
+    ovf_deploy {
+      allow_unverified_ssl_cert = true
+      remote_ovf_url            = var.url_ova
+      disk_provisioning         = "thin"
+      ip_protocol               = "IPv4"
+      ip_allocation_policy = "dhcpPolicy"
+      ovf_network_map = {
+        "Network 1" = data.vsphere_network.network.id
+        "Network 2" = data.vsphere_network.network.id
+      }
+    }
+    vapp {
+      properties = {
+         "password"          = "12345678",
+         "local-hostname"    = "terraform_vyos"
+      }
+    }
+  }
+  
+  output "ip" {
+    description = "default ip address of the deployed VM"
+    value       = vsphere_virtual_machine.vmFromRemoteOvf.default_ip_address
+  }
+  
+  # IP of AZ instance copied to a file ip.txt in local system
+  
+  resource "local_file" "ip" {
+      content  = vsphere_virtual_machine.vmFromRemoteOvf.default_ip_address
+      filename = "ip.txt"
+  }
+  
+  #Connecting to the Ansible control node using SSH connection
+  
+  resource "null_resource" "nullremote1" {
+  depends_on = ["vsphere_virtual_machine.vmFromRemoteOvf"]
+  connection {
+   type     = "ssh"
+   user     = "root"
+   password = var.ansiblepassword
+   host = var.ansiblehost
+  
+  }
+  
+  # Copying the ip.txt file to the Ansible control node from local system
+  
+   provisioner "file" {
+      source      = "ip.txt"
+      destination = "/root/vsphere/ip.txt"
+         }
+  }
+  
+  resource "null_resource" "nullremote2" {
+  depends_on = ["vsphere_virtual_machine.vmFromRemoteOvf"]
+  connection {
+          type     = "ssh"
+          user     = "root"
+          password = var.ansiblepassword
+          host = var.ansiblehost
+  }
+  
+  # Command to run ansible playbook on remote Linux OS
+  
+  provisioner "remote-exec" {
+  
+      inline = [
+          "cd /root/vsphere/",
+          "ansible-playbook instance.yml"
+  ]
+  }
+  }
+
+
+versions.tf
+
+.. code-block:: none
+
+  # Copyright (c) HashiCorp, Inc.
+  # SPDX-License-Identifier: MPL-2.0
+  
+  terraform {
+    required_providers {
+      vsphere = {
+        source  = "hashicorp/vsphere"
+        version = "2.4.0"
+      }
+    }
+  }
+
+variables.tf
+
+.. code-block:: none
+
+  # Copyright (c) HashiCorp, Inc.
+  # SPDX-License-Identifier: MPL-2.0
+  
+  variable "vsphere_server" {
+    description = "vSphere server"
+    type        = string
+  }
+  
+  variable "vsphere_user" {
+    description = "vSphere username"
+    type        = string
+  }
+  
+  variable "vsphere_password" {
+    description = "vSphere password"
+    type        = string
+    sensitive   = true
+  }
+  
+  variable "datacenter" {
+    description = "vSphere data center"
+    type        = string
+  }
+  
+  variable "cluster" {
+    description = "vSphere cluster"
+    type        = string
+  }
+  
+  variable "datastore" {
+    description = "vSphere datastore"
+    type        = string
+  }
+  
+  variable "network_name" {
+    description = "vSphere network name"
+    type        = string
+  }
+  
+  variable "host" {
+    description = "name if yor host"
+    type        = string
+  }
+  
+  variable "remotename" {
+    description = "the name of you VM"
+    type        = string
+  }
+  
+  variable "url_ova" {
+    description = "the URL to .OVA file or cloude store"
+    type        = string
+  }
+  
+  variable "ansiblepassword" {
+    description = "Ansible password"
+    type        = string
+  }
+  
+  variable "ansiblehost" {
+    description = "Ansible host name or IP"
+    type        = string
+  }
+
+terraform.tfvars
+
+.. code-block:: none
+
+  vsphere_user       = ""
+  vsphere_password   = ""
+  vsphere_server     = ""
+  datacenter         = ""
+  datastore          = ""
+  cluster            = ""
+  network_name       = ""
+  host               = ""
+  url_ova            = ""
+  ansiblepassword    = ""
+  ansiblehost        = ""
+  remotename         = ""
+
+Azure_terraform_ansible_single_vyos_instance
+--------------------------------------------
+
+How to create a single instance and install your configuration using Terraform+Ansible+Vsphere 
+Step by step:
+
+Vsphere
+-------
+
+1.1 Collect all data in to file "terraform.tfvars" and create resources fo example "terraform"
+
+Terraform
+---------
+
+2.1 Create a UNIX or Windows instance
+
+2.2 Download and install Terraform
+
+2.3 Create the folder for example ../vsphere/
+
+2.4 Copy all files from my folder /Terraform into your Terraform project
+
+2.5 Type the commands :
+
+   #cd /your folder
+   
+   #terraform init
+
+
+Ansible
+-------
+
+3.1 Create a UNIX instance
+
+3.2 Download and install Ansible
+
+3.3 Create the folder for example /root/vsphere/
+
+3.4 Copy all files from my folder /Ansible into your Ansible project (ansible.cfg, instance.yml and /group_vars)
+
+Start 
+-----
+
+4.1 Type the commands on your Terrafom instance:
+   
+   #cd /your folder 
+
+   #terraform plan  
+
+   #terraform apply  
+   
+   #yes
+