feat: Make ssh usage optional

Author: dploeger

README.md

@@ -108,12 +108,6 @@ Description: Azure Resource Group to use
 
 Type: `string`
 
-### ssh\_public\_key
-
-Description: SSH public key to access the kubernetes node with
-
-Type: `string`
-
 ### stage
 
 Description: Stage for this ip
@@ -269,6 +263,14 @@ Type: `string`
 
 Default: `"Free"`
 
+### ssh\_public\_key
+
+Description: SSH public key to access the kubernetes node with
+
+Type: `string`
+
+Default: `""`
+
 ### static\_outbound\_ip\_count
 
 Description:     On a lot of outgoing connections use this together with the maximum for outbound\_ports\_allocated of 64000 to not fall into network  

main.tf

@@ -68,10 +68,13 @@ resource "azurerm_kubernetes_cluster" "k8s" {
     }
   }
 
-  linux_profile {
-    admin_username = var.project
-    ssh_key {
-      key_data = var.ssh_public_key
+  dynamic "linux_profile" {
+    for_each = var.ssh_public_key == "" ? [] : [var.ssh_public_key]
+    content {
+      admin_username = var.project
+      ssh_key {
+        key_data = linux_profile.value
+      }
     }
   }
 }

vars.tf

@@ -159,6 +159,7 @@ variable "idle_timeout" {
 
 variable "ssh_public_key" {
   type        = string
+  default     = ""
   description = "SSH public key to access the kubernetes node with"
 }