Article about terraform and google.

How to deploy the Google Cloud instance using Terraform and Ansible for the latest version.

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diff --git a/docs/automation/terraform/terraformGoogle.rst b/docs/automation/terraform/terraformGoogle.rst
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+:lastproofread: 2024-03-25
+
+.. _terraformgoogle:
+
+Deploying VyOS in the google cloud
+==================================
+
+With the help of Terraform, you can quickly deploy VyOS-based infrastructure in the google cloud. If necessary, the infrastructure can be removed using terraform.
+Also we will make provisioning using Ansible.
+
+In this case, we'll create the necessary files for Terraform and Ansible next using Terraform we'll create a single instance on the google cloud and make provisioning using Ansible.
+
+Preparation steps for deploying VyOS on google 
+----------------------------------------------
+
+How to create a single instance and install your configuration using Terraform+Ansible+google 
+Step by step:
+
+google cloud
+
+
+  1 Create an account with google cloud and a new project
+
+.. image:: /_static/images/project.png
+   :width: 50%
+   :align: center
+   :alt: Network Topology Diagram
+
+  2 Create a service aacount and download your key (.JSON)
+
+.. image:: /_static/images/service.png
+   :width: 50%
+   :align: center
+   :alt: Network Topology Diagram
+
+.. image:: /_static/images/key.png
+   :width: 50%
+   :align: center
+   :alt: Network Topology Diagram
+
+The .JSON file download automaticly after creating and will look like:
+
+.. image:: /_static/images/json.png
+   :width: 50%
+   :align: center
+   :alt: Network Topology Diagram
+
+
+Terraform
+
+
+  1 Create an UNIX or Windows instance
+
+  2 Download and install Terraform
+
+  3 Create the folder for example /root/google
+
+.. code-block:: none
+
+   mkdir /root/google
+
+ 4 Copy all files into your Terraform project "/root/google" (vyos.tf, var.tf, terraform.tfvars, .JSON), more detailed see `Structure of files Terrafom for google cloud`_
+
+ 5 Type the commands :
+
+
+.. code-block:: none
+
+   cd /<your folder> 
+   terraform init
+
+
+Ansible
+
+
+  1 Create an UNIX instance whenever you want (local, cloud, and so on)
+
+  2 Download and install Ansible
+
+  3 Create the folder for example /root/google/
+
+  4 Copy all files into your Ansible project "/root/google/" (ansible.cfg, instance.yml, mykey.json and "all"), more detailed see `Structure of files Ansible for google cloud`_
+
+mykey.json you have to get using step 2 of the google cloud
+
+
+Start 
+
+
+Type the commands on your Terrafom instance:
+   
+.. code-block:: none
+
+   cd /<your folder>
+   terraform plan  
+   terraform apply  
+   yes
+
+
+Start creating a google cloud instance and check the result 
+-----------------------------------------------------------
+
+.. code-block:: none
+
+  # terraform apply
+  
+  Terraform used the selected providers to generate the following execution plan. Resource actions are indicated with the following symbols:
+    + create
+  
+  Terraform will perform the following actions:
+  
+    # google_compute_firewall.tcp_22[0] will be created
+    + resource "google_compute_firewall" "tcp_22" {
+        + creation_timestamp = (known after apply)
+        + destination_ranges = (known after apply)
+        + direction          = (known after apply)
+        + enable_logging     = (known after apply)
+        + id                 = (known after apply)
+        + name               = "vyos-tcp-22"
+        + network            = "default"
+        + priority           = 1000
+        + project            = "vyosproject"
+        + self_link          = (known after apply)
+        + source_ranges      = [
+            + "0.0.0.0/0",
+          ]
+        + target_tags        = [
+            + "vyos-deployment",
+          ]
+  
+        + allow {
+            + ports    = [
+                + "22",
+              ]
+            + protocol = "tcp"
+          }
+      }
+  
+    # google_compute_firewall.udp_500_4500[0] will be created
+    + resource "google_compute_firewall" "udp_500_4500" {
+        + creation_timestamp = (known after apply)
+        + destination_ranges = (known after apply)
+        + direction          = (known after apply)
+        + enable_logging     = (known after apply)
+        + id                 = (known after apply)
+       + name               = "vyos-udp-500-4500"
+        + network            = "default"
+        + priority           = 1000
+        + project            = "vyosproject"
+        + self_link          = (known after apply)
+        + source_ranges      = [
+           + "0.0.0.0/0",
+          ]
+        + target_tags        = [
+            + "vyos-deployment",
+          ]
+  
+        + allow {
+            + ports    = [
+                + "500",
+                + "4500",
+              ]
+            + protocol = "udp"
+          }
+      }
+  
+    # google_compute_instance.default will be created
+    + resource "google_compute_instance" "default" {
+        + can_ip_forward       = true
+        + cpu_platform         = (known after apply)
+        + current_status       = (known after apply)
+        + deletion_protection  = false
+        + effective_labels     = (known after apply)
+        + guest_accelerator    = (known after apply)
+        + id                   = (known after apply)
+        + instance_id          = (known after apply)
+        + label_fingerprint    = (known after apply)
+        + machine_type         = "n2-highcpu-4"
+        + metadata             = {
+            + "enable-oslogin"     = "FALSE"
+            + "serial-port-enable" = "TRUE"
+            + "user-data"          = ""
+          }
+        + metadata_fingerprint = (known after apply)
+        + min_cpu_platform     = (known after apply)
+        + name                 = "vyos"
+        + project              = "vyosproject"
+        + self_link            = (known after apply)
+        + tags_fingerprint     = (known after apply)
+        + terraform_labels     = (known after apply)
+        + zone                 = "us-west1-a"
+  
+        + boot_disk {
+            + auto_delete                = true
+            + device_name                = (known after apply)
+            + disk_encryption_key_sha256 = (known after apply)
+            + kms_key_self_link          = (known after apply)
+            + mode                       = "READ_WRITE"
+            + source                     = (known after apply)
+  
+            + initialize_params {
+                + image                  = "projects/sentrium-public/global/images/vyos-1-3-5-20231222143039"
+                + labels                 = (known after apply)
+                + provisioned_iops       = (known after apply)
+                + provisioned_throughput = (known after apply)
+                + size                   = (known after apply)
+                + type                   = (known after apply)
+              }
+          }
+  
+        + network_interface {
+            + internal_ipv6_prefix_length = (known after apply)
+            + ipv6_access_type            = (known after apply)
+            + ipv6_address                = (known after apply)
+            + name                        = (known after apply)
+            + network                     = "default"
+            + network_ip                  = (known after apply)
+            + nic_type                    = "GVNIC"
+            + stack_type                  = (known after apply)
+            + subnetwork                  = "default"
+            + subnetwork_project          = (known after apply)
+  
+            + access_config {
+                + nat_ip       = (known after apply)
+                + network_tier = (known after apply)
+              }
+          }
+      }
+  
+    # local_file.ip will be created
+    + resource "local_file" "ip" {
+        + content              = (known after apply)
+        + content_base64sha256 = (known after apply)
+        + content_base64sha512 = (known after apply)
+        + content_md5          = (known after apply)
+        + content_sha1         = (known after apply)
+        + content_sha256       = (known after apply)
+        + content_sha512       = (known after apply)
+        + directory_permission = "0777"
+        + file_permission      = "0777"
+        + filename             = "ip.txt"
+        + id                   = (known after apply)
+      }
+  
+    # null_resource.SSHconnection1 will be created
+    + resource "null_resource" "SSHconnection1" {
+        + id = (known after apply)
+      }
+  
+    # null_resource.SSHconnection2 will be created
+    + resource "null_resource" "SSHconnection2" {
+        + id = (known after apply)
+      }
+  
+  Plan: 6 to add, 0 to change, 0 to destroy.
+  
+  Changes to Outputs:
+    + public_ip_address = (known after apply)
+  ╷
+  │ Warning: Quoted references are deprecated
+  │
+  │   on vyos.tf line 126, in resource "null_resource" "SSHconnection1":
+  │  126:   depends_on = ["google_compute_instance.default"]
+  │
+  │ In this context, references are expected literally rather than in quotes. Terraform 0.11 and earlier required quotes, but quoted references are now deprecated and will be removed in a
+  │ future version of Terraform. Remove the quotes surrounding this reference to silence this warning.
+  │
+  │ (and one more similar warning elsewhere)
+  ╵
+  
+  Do you want to perform these actions?
+    Terraform will perform the actions described above.
+    Only 'yes' will be accepted to approve.
+  
+    Enter a value: yes
+  
+  google_compute_firewall.udp_500_4500[0]: Creating...
+  google_compute_firewall.tcp_22[0]: Creating...
+  google_compute_instance.default: Creating...
+  google_compute_firewall.udp_500_4500[0]: Still creating... [10s elapsed]
+  google_compute_firewall.tcp_22[0]: Still creating... [10s elapsed]
+  google_compute_instance.default: Still creating... [10s elapsed]
+  google_compute_firewall.tcp_22[0]: Creation complete after 16s [id=projects/vyosproject/global/firewalls/vyos-tcp-22]
+  google_compute_firewall.udp_500_4500[0]: Creation complete after 16s [id=projects/vyosproject/global/firewalls/vyos-udp-500-4500]
+  google_compute_instance.default: Creation complete after 20s [id=projects/vyosproject/zones/us-west1-a/instances/vyos]
+  null_resource.SSHconnection1: Creating...
+  null_resource.SSHconnection2: Creating...
+  null_resource.SSHconnection1: Provisioning with 'file'...
+  null_resource.SSHconnection2: Provisioning with 'remote-exec'...
+  null_resource.SSHconnection2 (remote-exec): Connecting to remote host via SSH...
+  null_resource.SSHconnection2 (remote-exec):   Host: 10.***.***.104
+  null_resource.SSHconnection2 (remote-exec):   User: root
+  null_resource.SSHconnection2 (remote-exec):   Password: true
+  null_resource.SSHconnection2 (remote-exec):   Private key: false
+  null_resource.SSHconnection2 (remote-exec):   Certificate: false
+  null_resource.SSHconnection2 (remote-exec):   SSH Agent: false
+  null_resource.SSHconnection2 (remote-exec):   Checking Host Key: false
+  null_resource.SSHconnection2 (remote-exec):   Target Platform: unix
+  local_file.ip: Creating...
+  local_file.ip: Creation complete after 0s [id=7d568c3b994a018c942a3cdb952ccbf3c729d0ca]
+  null_resource.SSHconnection2 (remote-exec): Connected!
+  null_resource.SSHconnection1: Creation complete after 4s [id=5175298735911137161]
+  
+  null_resource.SSHconnection2 (remote-exec): PLAY [integration of terraform and ansible] ************************************
+  
+  null_resource.SSHconnection2 (remote-exec): TASK [Wait 300 seconds, but only start checking after 60 seconds] **************
+  null_resource.SSHconnection2: Still creating... [10s elapsed]
+  null_resource.SSHconnection2: Still creating... [20s elapsed]
+  null_resource.SSHconnection2: Still creating... [30s elapsed]
+  null_resource.SSHconnection2: Still creating... [40s elapsed]
+  null_resource.SSHconnection2: Still creating... [50s elapsed]
+  null_resource.SSHconnection2: Still creating... [1m0s elapsed]
+  null_resource.SSHconnection2: Still creating... [1m10s elapsed]
+  null_resource.SSHconnection2 (remote-exec): ok: [104.***.***.158]
+  
+  null_resource.SSHconnection2 (remote-exec): TASK [Configure general settings for the vyos hosts group] *********************
+  null_resource.SSHconnection2: Still creating... [1m20s elapsed]
+  null_resource.SSHconnection2 (remote-exec): changed: [104.***.***.158]
+  
+  null_resource.SSHconnection2 (remote-exec): PLAY RECAP *********************************************************************
+  null_resource.SSHconnection2 (remote-exec): 104.***.***.158            : ok=2    changed=1    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0
+  
+  null_resource.SSHconnection2: Creation complete after 1m22s [id=3355727070503709742]
+  
+  Apply complete! Resources: 6 added, 0 changed, 0 destroyed.
+  
+  Outputs:
+  
+  public_ip_address = "104.***.***.158"
+
+
+
+After executing all the commands you will have your VyOS instance on the google cloud with your configuration, it's a very convenient desition.
+If you need to delete the instance please type the command:
+
+.. code-block:: none
+
+  terraform destroy
+
+
+Troubleshooting
+---------------
+
+  1 Increase the time in the file instance.yml from 300 sec to 500 sec or more. (It depends on your location).
+Make sure that you have opened access to the instance in the security group.
+
+  2 Terraform doesn't connect via SSH to your Ansible instance: you have to check the correct login and password in the part of the file VyOS.tf
+
+.. code-block:: none
+
+  connection {
+   type     = "ssh"  
+   user     = "root"              # open root access using login and password on your Ansible
+   password = var.password        # check password in the file terraform.tfvars isn't empty
+       host = var.host            # check the correct IP address of your Ansible host
+  }
+
+
+Make sure that Ansible is pinging from Terrafom.
+
+Structure of files Terrafom for google cloud
+--------------------------------------------
+
+.. code-block:: none
+
+ .
+ ├── vyos.tf				# The main script
+ ├── ***.JSON               # The credential file from google cloud
+ ├── var.tf					# The file of all variables in "vyos.tf"
+ └── terraform.tfvars		# The value of all variables (passwords, login, ip adresses and so on)
+ 
+
+ 
+File contents of Terrafom for google cloud
+------------------------------------------
+
+vyos.tf
+
+.. code-block:: none
+
+
+  ##############################################################################
+  # Build an VyOS VM from the Marketplace
+  # 
+  # After deploying the GCP instance and getting an IP address, the IP address is copied into the file  
+  #"ip.txt" and copied to the Ansible node for provisioning.
+  ##############################################################################
+
+  terraform {
+    required_providers {
+      google = {
+        source = "hashicorp/google"
+      }
+    }
+  }
+  
+  provider "google" {
+    project         = var.project_id
+    request_timeout = "60s"
+    credentials = file(var.gcp_auth_file)
+  }
+
+  locals {
+    network_interfaces = [for i, n in var.networks : {
+      network     = n,
+      subnetwork  = length(var.sub_networks) > i ? element(var.sub_networks, i) : null
+      external_ip = length(var.external_ips) > i ? element(var.external_ips, i) : "NONE"
+      }
+    ]
+  }
+  
+  resource "google_compute_instance" "default" {
+    name         = var.goog_cm_deployment_name
+    machine_type = var.machine_type
+    zone         = var.zone
+  
+    metadata = {
+      enable-oslogin     = "FALSE"
+      serial-port-enable = "TRUE"
+      user-data          = var.vyos_user_data
+    }
+    boot_disk {
+      initialize_params {
+        image = var.image
+      }
+    }
+  
+    can_ip_forward = true
+
+    dynamic "network_interface" {
+      for_each = local.network_interfaces
+      content {
+        network    = network_interface.value.network
+        subnetwork = network_interface.value.subnetwork
+        nic_type   = "GVNIC"
+        dynamic "access_config" {
+          for_each = network_interface.value.external_ip == "NONE" ? [] : [1]
+          content {
+            nat_ip = network_interface.value.external_ip == "EPHEMERAL" ? null : network_interface.value.external_ip
+          }
+        }
+      }
+    }
+  }
+
+  resource "google_compute_firewall" "tcp_22" {
+    count = var.enable_tcp_22 ? 1 : 0
+  
+    name    = "${var.goog_cm_deployment_name}-tcp-22"
+    network = element(var.networks, 0)
+  
+    allow {
+      ports    = ["22"]
+      protocol = "tcp"
+    }
+  
+    source_ranges = ["0.0.0.0/0"]
+  
+    target_tags = ["${var.goog_cm_deployment_name}-deployment"]
+  }
+  
+  resource "google_compute_firewall" "udp_500_4500" {
+    count = var.enable_udp_500_4500 ? 1 : 0
+  
+    name    = "${var.goog_cm_deployment_name}-udp-500-4500"
+    network = element(var.networks, 0)
+  
+  allow {
+    ports    = ["500", "4500"]
+    protocol = "udp"
+  }
+
+  source_ranges = ["0.0.0.0/0"]
+
+    target_tags = ["${var.goog_cm_deployment_name}-deployment"]
+  }
+  
+  output "public_ip_address" {
+    value = google_compute_instance.default.network_interface[0].access_config[0].nat_ip
+  }
+  
+  ##############################################################################
+  #
+  # IP of google instance copied to a file ip.txt in local system Terraform
+  # ip.txt looks like:
+  # cat ./ip.txt
+  # ххх.ххх.ххх.ххх
+  ##############################################################################
+  
+  resource "local_file" "ip" {
+      content  = google_compute_instance.default.network_interface[0].access_config[0].nat_ip
+      filename = "ip.txt"
+  }
+  
+  #connecting to the Ansible control node using SSH connection
+  
+  ##############################################################################
+  # Steps "SSHconnection1" and "SSHconnection2" need to get file ip.txt from the terraform node and start remotely the playbook of Ansible.
+  ##############################################################################
+  
+  resource "null_resource" "SSHconnection1" {
+  depends_on = ["google_compute_instance.default"]
+  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/google/ip.txt"                             # The folder of your Ansible project
+         }
+  }
+  
+  resource "null_resource" "SSHconnection2" {
+  depends_on = ["google_compute_instance.default"]
+  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/google/",
+      "ansible-playbook instance.yml"                               # more detailed in "File contents of Ansible for google cloud"
+  ]
+  }
+  }
+
+
+var.tf
+
+.. code-block:: none
+
+  variable "image" {
+    type    = string
+    default = "projects/sentrium-public/global/images/vyos-1-3-5-20231222143039"
+  }
+  
+  variable "project_id" {
+    type = string
+  }
+  
+  variable "zone" {
+    type = string
+  }
+  
+  ##############################################################################
+  # You can choose more chipper type than n2-highcpu-4
+  ##############################################################################
+  
+  variable "machine_type" {
+    type    = string
+    default = "n2-highcpu-4"
+  }
+  
+  variable "networks" {
+    description = "The network name to attach the VM instance."
+    type        = list(string)
+    default     = ["default"]
+  }
+
+  variable "sub_networks" {
+    description = "The sub network name to attach the VM instance."
+    type        = list(string)
+    default     = ["default"]
+  }
+  
+  variable "external_ips" {
+    description = "The external IPs assigned to the VM for public access."
+    type        = list(string)
+    default     = ["EPHEMERAL"]
+  }
+  
+  variable "enable_tcp_22" {
+    description = "Allow SSH traffic from the Internet"
+    type        = bool
+    default     = true
+  }
+  
+  variable "enable_udp_500_4500" {
+    description = "Allow IKE/IPSec traffic from the Internet"
+    type        = bool
+    default     = true
+  }
+  
+  variable "vyos_user_data" {
+    type    = string
+    default = ""
+  }
+  
+  // Marketplace requires this variable name to be declared
+  variable "goog_cm_deployment_name" {
+    description = "VyOS Universal Router Deployment"
+    type        = string
+    default     = "vyos"
+  }
+  
+  # GCP authentication file
+  variable "gcp_auth_file" {
+    type        = string
+    description = "GCP authentication file"
+  }
+  
+  variable "password" {
+     description = "pass for Ansible"
+     type = string
+     sensitive = true
+  }
+  variable "host"{
+    description = "The IP of my Ansible"
+    type = string
+  }
+  
+  
+terraform.tfvars
+
+.. code-block:: none
+
+  ##############################################################################
+  # Must be filled in
+  ##############################################################################
+  
+  zone = "us-west1-a"
+  gcp_auth_file = "/root/***/***.json"   # path of your .json file
+  project_id    = ""                     # the google project
+  password      = ""                     # password for Ansible SSH
+  host          = ""                     # IP of my Ansible
+
+
+Structure of files Ansible for google cloud
+-------------------------------------------
+
+.. code-block:: none
+
+ .
+ ├── group_vars
+     └── all
+ ├── ansible.cfg
+ └── instance.yml
+ 
+ 
+File contents of Ansible for google cloud
+-----------------------------------------
+
+ansible.cfg
+
+.. code-block:: none
+
+  [defaults]
+  inventory = /root/google/ip.txt
+  host_key_checking= False
+  remote_user=vyos
+
+instance.yml
+
+.. code-block:: none
+
+  ##############################################################################
+  # About tasks:
+  # "Wait 300 seconds, but only start checking after 60 seconds" - try to make ssh connection every 60 seconds until 300 seconds
+  # "Configure general settings for the VyOS hosts group" - make provisioning into google cloud VyOS node
+  # You have to add all necessary cammans of VyOS under the block "lines:"
+  ##############################################################################
+
+
+  - 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 xxx.xxx.xxx.xxx
+          save:
+            true
+
+
+group_vars/all
+
+.. code-block:: none
+
+  ansible_connection: ansible.netcommon.network_cli
+  ansible_network_os: vyos.vyos.vyos
+  ansible_user: vyos
+  ansible_ssh_pass: vyos
+
+Sourse files for google cloud from GIT
+--------------------------------------
+
+All files about the article can be found here_
+
+
+.. _here: https://github.com/vyos/vyos-automation/tree/main/TerraformCloud/Google_terraform_ansible_single_vyos_instance-main
\ No newline at end of file