Added ansible inventory generation

Author: Zolli

terraform/inventory.template

@@ -0,0 +1,16 @@
+[k3s-cluster:children]
+servers
+workers
+
+[servers]%{for host in servers}
+${host.server.name} ansible_ssh_host=${host.server.ipv4_address}
+%{endfor}
+[workers]%{for host in workers}
+${host.server.name} ansible_ssh_host=${host.server.ipv4_address}
+%{endfor}
+[k3s-cluster:vars]
+ansible_connection=ssh
+ansible_user=root
+ansible_python_interpreter="/usr/bin/env python3"
+user_username=${user}
+user_ssh_key_url=https://github.com/${user}.keys

terraform/main.tf

@@ -1,3 +1,12 @@
+terraform {
+  required_providers {
+    local = {
+      source = "hashicorp/local"
+      version = "~> 2.1"
+    }
+  }
+}
+
 module "project_init" {
   source = "./project_init"
 
@@ -31,4 +40,17 @@ module "worker_nodes" {
   ssh_key_name                  = module.project_init.ssh_key_name
   kubernetes_private_network_id = module.networking.kubernetes_private_network_id
   placement_group_id            = module.project_init.placement_group_id
+}
+
+resource "local_file" "ansible_inventory_generation" {
+  filename = abspath("${path.module}/../inventory")
+  content  = templatefile("${path.module}/inventory.template", {
+    servers: [for i in range(var.server_node_count) : {
+      server: module.server_nodes.server_nodes[i]
+    }],
+    workers: [for i in range(var.worker_node_count) : {
+      server: module.worker_nodes.worker_nodes[i]
+    }],
+    user: var.github_user
+  })
 }

terraform/server_nodes/outputs.tf

@@ -0,0 +1,3 @@
+output "server_nodes" {
+  value = hcloud_server.server_node
+}

terraform/worker_nodes/outputs.tf

@@ -0,0 +1,3 @@
+output "worker_nodes" {
+  value = hcloud_server.worker_node
+}