terraform 0.12 compatible formatting

Author: tillepille

README.md

@@ -78,5 +78,6 @@ Please use the [issue tracker](https://github.com/solidnerd/terraform-k8s-hcloud
 
 
 **Tested with**
-- Terraform [v0.11.10](https://github.com/hashicorp/terraform/tree/v0.11.10)
-- provider.hcloud [v1.6.0](https://github.com/terraform-providers/terraform-provider-hcloud/tree/v1.6.0)
+
+- Terraform [v0.12.8](https://github.com/hashicorp/terraform/tree/v0.12.8)
+- provider.hcloud [v1.12.0](https://github.com/terraform-providers/terraform-provider-hcloud)

install-calico.tf

@@ -1,18 +1,19 @@
 resource "null_resource" "calico" {
-  count = "${var.calico_enabled ? 1 : 0}"
+  count = var.calico_enabled ? 1 : 0
 
   connection {
-    host        = "${hcloud_server.master.*.ipv4_address}"
-    private_key = "${file(var.ssh_private_key)}"
+    host        = hcloud_server.master.*.ipv4_address
+    private_key = file(var.ssh_private_key)
   }
 
   provisioner "remote-exec" {
-    inline = <<EOF
-    kubectl apply -f https://docs.projectcalico.org/v3.2/getting-started/kubernetes/installation/hosted/etcd.yaml
-    kubectl apply -f https://docs.projectcalico.org/v3.2/getting-started/kubernetes/installation/rbac.yaml
-    kubectl apply -f https://docs.projectcalico.org/v3.2/getting-started/kubernetes/installation/hosted/calico.yaml
-    EOF
+    inline = [
+      "kubectl apply -f https://docs.projectcalico.org/v3.2/getting-started/kubernetes/installation/hosted/etcd.yaml",
+      "kubectl apply -f https://docs.projectcalico.org/v3.2/getting-started/kubernetes/installation/rbac.yaml",
+      "kubectl apply -f https://docs.projectcalico.org/v3.2/getting-started/kubernetes/installation/hosted/calico.yaml"
+    ]
   }
 
-  depends_on = ["hcloud_server.master"]
+  depends_on = [hcloud_server.master]
 }
+

main.tf

@@ -1,21 +1,23 @@
 provider "hcloud" {
-  token = "${var.hcloud_token}"
+  token = var.hcloud_token
 }
 
 resource "hcloud_ssh_key" "k8s_admin" {
   name       = "k8s_admin"
-  public_key = "${file(var.ssh_public_key)}"
+  public_key = file(var.ssh_public_key)
 }
 
 resource "hcloud_server" "master" {
-  count       = "${var.master_count}"
+  count       = var.master_count
   name        = "master-${count.index + 1}"
-  server_type = "${var.master_type}"
-  image       = "${var.master_image}"
-  ssh_keys    = ["${hcloud_ssh_key.k8s_admin.id}"]
+  server_type = var.master_type
+  image       = var.master_image
+  ssh_keys    = [hcloud_ssh_key.k8s_admin.id]
 
   connection {
-    private_key = "${file(var.ssh_private_key)}"
+    host        = self.ipv4_address
+    type        = "ssh"
+    private_key = file(var.ssh_private_key)
   }
 
   provisioner "file" {
@@ -29,7 +31,7 @@ resource "hcloud_server" "master" {
   }
 
   provisioner "remote-exec" {
-    inline = "DOCKER_VERSION=${var.docker_version} KUBERNETES_VERSION=${var.kubernetes_version} bash /root/bootstrap.sh"
+    inline = ["DOCKER_VERSION=${var.docker_version} KUBERNETES_VERSION=${var.kubernetes_version} bash /root/bootstrap.sh"]
   }
 
   provisioner "file" {
@@ -38,31 +40,33 @@ resource "hcloud_server" "master" {
   }
 
   provisioner "remote-exec" {
-    inline = "CORE_DNS=${var.core_dns} bash /root/master.sh"
+    inline = ["CORE_DNS=${var.core_dns} bash /root/master.sh"]
   }
 
   provisioner "local-exec" {
     command = "bash scripts/copy-kubeadm-token.sh"
 
-    environment {
-      SSH_PRIVATE_KEY = "${var.ssh_private_key}"
+    environment = {
+      SSH_PRIVATE_KEY = var.ssh_private_key
       SSH_USERNAME    = "root"
-      SSH_HOST        = "${hcloud_server.master.ipv4_address}"
+      SSH_HOST        = hcloud_server.master[0].ipv4_address
       TARGET          = "${path.module}/secrets/"
     }
   }
 }
 
 resource "hcloud_server" "node" {
-  count       = "${var.node_count}"
+  count       = var.node_count
   name        = "node-${count.index + 1}"
-  server_type = "${var.node_type}"
-  image       = "${var.node_image}"
-  depends_on  = ["hcloud_server.master"]
-  ssh_keys    = ["${hcloud_ssh_key.k8s_admin.id}"]
+  server_type = var.node_type
+  image       = var.node_image
+  depends_on  = [hcloud_server.master]
+  ssh_keys    = [hcloud_ssh_key.k8s_admin.id]
 
   connection {
-    private_key = "${file(var.ssh_private_key)}"
+    host        = self.ipv4_address
+    type        = "ssh"
+    private_key = file(var.ssh_private_key)
   }
 
   provisioner "file" {
@@ -76,17 +80,18 @@ resource "hcloud_server" "node" {
   }
 
   provisioner "remote-exec" {
-    inline = "DOCKER_VERSION=${var.docker_version} KUBERNETES_VERSION=${var.kubernetes_version} bash /root/bootstrap.sh"
+    inline = ["DOCKER_VERSION=${var.docker_version} KUBERNETES_VERSION=${var.kubernetes_version} bash /root/bootstrap.sh"]
   }
 
   provisioner "file" {
     source      = "${path.module}/secrets/kubeadm_join"
     destination = "/tmp/kubeadm_join"
 
     connection {
+      host        = self.ipv4_address
       type        = "ssh"
       user        = "root"
-      private_key = "${file(var.ssh_private_key)}"
+      private_key = file(var.ssh_private_key)
     }
   }
 
@@ -96,6 +101,7 @@ resource "hcloud_server" "node" {
   }
 
   provisioner "remote-exec" {
-    inline = "bash /root/node.sh"
+    inline = ["bash /root/node.sh"]
   }
 }
+

outputs.tf

@@ -1,7 +1,8 @@
 output "node_ips" {
-  value = ["${hcloud_server.node.*.ipv4_address}"]
+  value = [hcloud_server.node.*.ipv4_address]
 }
 
 output "master_ips" {
-  value = ["${hcloud_server.master.*.ipv4_address}"]
+  value = [hcloud_server.master.*.ipv4_address]
 }
+

variables.tf

@@ -1,6 +1,8 @@
-variable "hcloud_token" {}
+variable "hcloud_token" {
+}
 
-variable "master_count" {}
+variable "master_count" {
+}
 
 variable "master_image" {
   description = "Predefined Image that will be used to spin up the machines (Currently supported: ubuntu-16.04, debian-9,centos-7,fedora-27)"
@@ -12,7 +14,8 @@ variable "master_type" {
   default     = "cx11"
 }
 
-variable "node_count" {}
+variable "node_count" {
+}
 
 variable "node_image" {
   description = "Predefined Image that will be used to spin up the machines (Currently supported: ubuntu-16.04, debian-9,centos-7,fedora-27)"
@@ -49,3 +52,4 @@ variable "core_dns" {
 variable "calico_enabled" {
   default = false
 }
+

versions.tf

@@ -0,0 +1,4 @@
+
+terraform {
+  required_version = ">= 0.12"
+}