instance_templates.tf

# instance_templates.tf

locals {
  # Instance Templates definition
  instance_templates = {
    "cluster" = { # Name Prefix of each Instance Template 
      name                 = "cluster"
      region               = var.region
      preemptible          = false
      disk_type            = "pd-balanced"
      disk_size_gb         = "100"
      auto_delete          = true
      source_image_project = "ubuntu-os-cloud"
      source_image_family  = "ubuntu-2004-lts"
      source_image         = "ubuntu-2004-focal-v20221018"
      machine_type         = "e2-standard-8"
      tags                 = ["ssh"]
      labels = {
        cluster = "central"
      }
      subnetwork = "main-cni-subnet"
      access_config = [{
        nat_ip       = null
        network_tier = null
      }]
      # additional_networks = [{
      #   network            = "multus-vpc"
      #   subnetwork         = "multus-subnet"
      #   subnetwork_project = var.project_id
      #   network_ip         = ""
      #   access_config = [{
      #     nat_ip       = null
      #     network_tier = null
      #   }]
      # }]
      service_account = {
        email  = "compute-general@${var.project_id}.iam.gserviceaccount.com"
        scopes = []
      }
    }
  }
}

# Instance Templates Creation
module "instance_templates" {
  for_each             = { for instance_templates in local.instance_templates : instance_templates.name => instance_templates }
  source               = "terraform-google-modules/vm/google//modules/instance_template"
  version              = "7.9.0"
  project_id           = var.project_id
  name_prefix          = each.key
  region               = each.value.region
  preemptible          = each.value.preemptible
  disk_type            = each.value.disk_type
  disk_size_gb         = each.value.disk_size_gb
  auto_delete          = each.value.auto_delete
  source_image_project = each.value.source_image_project
  source_image_family  = each.value.source_image_family
  source_image         = each.value.source_image
  machine_type         = each.value.machine_type
  tags                 = each.value.tags
  labels               = each.value.labels
  subnetwork           = each.value.subnetwork
  access_config        = each.value.access_config
  # additional_networks = each.value.additional_networks
  subnetwork_project = var.project_id
  service_account    = each.value.service_account
  depends_on         = [module.subnets, module.service_accounts]
}