feat(umig): add add_hostname_suffix variable to align hostname behavior with compute_instance module

modules/umig/README.md

@@ -16,6 +16,7 @@ See the [simple](https://github.com/terraform-google-modules/terraform-google-vm
 | Name | Description | Type | Default | Required |
 |------|-------------|------|---------|:--------:|
 | access\_config | Access configurations, i.e. IPs via which the VM instance can be accessed via the Internet. | <pre>list(list(object({<br>    nat_ip       = string<br>    network_tier = string<br>  })))</pre> | `[]` | no |
+| add\_hostname\_suffix | Adds a suffix to the hostname | `bool` | `true` | no |
 | additional\_networks | Additional network interface details for GCE, if any. | <pre>list(object({<br>    network            = string<br>    subnetwork         = string<br>    subnetwork_project = string<br>    network_ip         = string<br>    access_config = list(object({<br>      nat_ip       = string<br>      network_tier = string<br>    }))<br>    ipv6_access_config = list(object({<br>      network_tier = string<br>    }))<br>  }))</pre> | `[]` | no |
 | hostname | Hostname of instances | `string` | `""` | no |
 | hostname\_suffix\_separator | Separator character to compose hostname when add\_hostname\_suffix is set to true. | `string` | `"-"` | no |

modules/umig/main.tf

@@ -48,7 +48,7 @@ data "google_compute_zones" "available" {
 resource "google_compute_instance_from_template" "compute_instance" {
   provider = google
   count    = local.num_instances
-  name     = format("%s%s%s", local.hostname, var.hostname_suffix_separator, format("%03d", count.index + 1))
+  name     = var.add_hostname_suffix ? format("%s%s%s", local.hostname, var.hostname_suffix_separator, format("%03d", count.index + 1)) : local.hostname
   project  = var.project_id
   zone     = local.zones[count.index % length(local.zones)]
 

modules/umig/metadata.display.yaml

@@ -31,6 +31,9 @@ spec:
         access_config:
           name: access_config
           title: Access Config
+        add_hostname_suffix:
+          name: add_hostname_suffix
+          title: Add Hostname Suffix
         additional_networks:
           name: additional_networks
           title: Additional Networks

modules/umig/metadata.yaml

@@ -122,6 +122,10 @@ spec:
         description: Hostname of instances
         varType: string
         defaultValue: ""
+      - name: add_hostname_suffix
+        description: Adds a suffix to the hostname
+        varType: bool
+        defaultValue: true
       - name: static_ips
         description: List of static IPs for VM instances
         varType: list(string)

modules/umig/variables.tf

@@ -67,6 +67,12 @@ variable "hostname" {
   default     = ""
 }
 
+variable "add_hostname_suffix" {
+  description = "Adds a suffix to the hostname"
+  type        = bool
+  default     = true
+}
+
 variable "static_ips" {
   type        = list(string)
   description = "List of static IPs for VM instances"