Add support to customize the cluster name

README.md

@@ -91,6 +91,7 @@ The project provides several Terraform variables that allow you to customize the
 | <a name="input_kubespray_image"></a> [kubespray\_image](#input\_kubespray\_image) | n/a | `string` | `"khanhphhub/kubespray:v2.22.0"` | no |
 | <a name="input_kube_version"></a> [kube\_version](#input\_kube\_version) | Kubernetes version | `string` | `"v1.24.6"` | no |
 | <a name="input_kube_network_plugin"></a> [kube\_network\_plugin](#input\_kube\_network\_plugin) | Choose network plugin (cilium, calico, kube-ovn, weave or flannel. Use cni for generic cni plugin) | `string` | `"calico"` | no |
+| <a name="input_cluster_name"></a> [cluster\_name](#input\_cluster\_name) | Kubernetes cluster name, also will be used as DNS domain | `string` | `""` | no |
 | <a name="input_enable_nodelocaldns"></a> [enable\_nodelocaldns](#input\_enable\_nodelocaldns) | Enable nodelocal dns cache | `bool` | `false` | no |
 | <a name="input_podsecuritypolicy_enabled"></a> [podsecuritypolicy\_enabled](#input\_podsecuritypolicy\_enabled) | pod security policy (RBAC must be enabled either by having 'RBAC' in authorization\_modes or kubeadm enabled) | `bool` | `false` | no |
 | <a name="input_persistent_volumes_enabled"></a> [persistent\_volumes\_enabled](#input\_persistent\_volumes\_enabled) | Add Persistent Volumes Storage Class for corresponding cloud provider (supported: in-tree OpenStack, Cinder CSI, AWS EBS CSI, Azure Disk CSI, GCP Persistent Disk CSI) | `bool` | `false` | no |

kubespray/k8s-cluster.yaml

@@ -157,7 +157,7 @@ kube_encrypt_secret_data: false
 
 # DNS configuration.
 # Kubernetes cluster name, also will be used as DNS domain
-cluster_name: cluster.local
+cluster_name: ${cluster_name}
 # Subdomains of DNS domain to be resolved via /etc/resolv.conf for hostnet pods
 ndots: 2
 # dns_timeout: 2

variables.tf

@@ -165,6 +165,11 @@ variable "kube_network_plugin" {
   description = "Choose network plugin (cilium, calico, kube-ovn, weave or flannel. Use cni for generic cni plugin)"
   default     = "calico"
 }
+variable "cluster_name" {
+  type        = string
+  description = "Kubernetes cluster name, also will be used as DNS domain"
+  default     = ""
+}
 variable "enable_nodelocaldns" {
   type        = bool
   description = "Enable nodelocal dns cache"

vm-kubespray-host.tf

@@ -30,6 +30,7 @@ locals {
     {
       kube_version               = var.kube_version
       kube_network_plugin        = var.kube_network_plugin
+      cluster_name               = var.cluster_name != "" ? var.cluster_name : "proxmox-k8s-${var.env_name}.local"
       enable_nodelocaldns        = var.enable_nodelocaldns
       podsecuritypolicy_enabled  = var.podsecuritypolicy_enabled
       persistent_volumes_enabled = var.persistent_volumes_enabled