Merge pull request #10 from johncosta/johncosta/gh-6

[GH-6] adds kubeconfig file feature

README.md

@@ -24,7 +24,7 @@ This module is inspired by [terraform-aws-eks](https://github.com/terraform-aws-
 ```hcl
 module "k8s" {
   source  = "terraform-digitalocean-kubernetes"
-  version = "0.0.3"
+  version = "0.0.6"
 
   cluster_name_prefix          = "test-cluster"
   cluster_region               = "nyc1"
@@ -33,7 +33,10 @@ module "k8s" {
   default_node_pool_node_count = 1
   default_node_pool_node_size  = "s-2vcpu-2gb"
 
-
   cluster_ipv4_cidr            = "10.1.0.0/20"
+
+  # writes the kubeconfig to the local filesystem
+  path_to_kubeconfig         = "/full/path/to/.kube"
+  use_cluster_name_in_config = true
 }
 ```

main.tf

@@ -6,6 +6,11 @@ locals {
   create_vpc                 = var.cluster_ipv4_cidr != null && var.cluster_ipv4_cidr != ""
   allow_default_vpc          = !local.create_vpc && var.allow_default_vpc ? true : false
   default_vpc_value_or_error = local.create_vpc || local.allow_default_vpc ? null : file("[Error] you must explicitly set the variable `allow_default_vpc` if you want the cluster to access the default vpc")
+
+  create_kubeconfig          = var.path_to_kubeconfig != null && var.path_to_kubeconfig != ""
+  use_cluster_name_in_config = var.use_cluster_name_in_config ? true : false
+  kubeconfig_filename        = local.use_cluster_name_in_config ? join("-", [local.cluster_name, "config"]) : "config"
+  full_path_to_kubeconfig    = join("/", [var.path_to_kubeconfig, local.kubeconfig_filename])
 }
 
 data "digitalocean_kubernetes_versions" "version" {
@@ -36,3 +41,10 @@ resource "digitalocean_vpc" "vpc" {
   region   = var.cluster_region
   ip_range = var.cluster_ipv4_cidr
 }
+
+resource "local_sensitive_file" "kubeconfig" {
+  count = local.create_kubeconfig ? 1 : 0
+
+  content  = digitalocean_kubernetes_cluster.cluster.kube_config[0].raw_config
+  filename = local.full_path_to_kubeconfig
+}

outputs.tf

@@ -17,3 +17,11 @@ output "cluster_endpoint" {
 output "cluster_kube_config" {
   value = digitalocean_kubernetes_cluster.cluster.kube_config
 }
+
+output "full_path_to_kubeconfig" {
+  value = local.full_path_to_kubeconfig
+}
+
+output "environment_variable_kubeconfig" {
+  value = "export KUBECONFIG=${local.full_path_to_kubeconfig}"
+}

provider.tf

@@ -4,7 +4,11 @@ terraform {
   required_providers {
     digitalocean = {
       source  = "digitalocean/digitalocean"
-      version = "2.32.0"
+      version = "~> 2.32.0"
+    }
+    local = {
+      source  = "hashicorp/local"
+      version = "~> 2.4.0"
     }
   }
 }

variables.tf

@@ -41,3 +41,16 @@ variable "default_node_pool_node_count" {
   description = "default node pool node count"
   nullable    = false
 }
+
+variable "path_to_kubeconfig" {
+  type        = string
+  description = "path to kubeconfig"
+  nullable    = false
+}
+
+variable "use_cluster_name_in_config" {
+  type        = bool
+  description = "use cluster name in config"
+  nullable    = true
+  default     = false
+}