Add digitalocean terraform

Signed-off-by: Christian Simon <[email protected]>

Author: simonswine

demo/infrastructure/digitalocean/.gitignore

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+/config-map-aws-auth_*
+/kubeconfig_*

demo/infrastructure/digitalocean/dns.tf

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+data "external" "cert_manager" {
+  program = ["jq", ".cert_manager", "../../manifests/google-config.json"]
+  query   = {}
+}
+
+data "external" "externaldns" {
+  program = ["jq", ".externaldns", "../../manifests/google-config.json"]
+  query   = {}
+}

demo/infrastructure/digitalocean/outputs.tf

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+locals {
+  config = {
+    cert_manager = "${data.external.cert_manager.result}"
+    externaldns  = "${data.external.externaldns.result}"
+    gangway      = "${module.gangway.config}"
+  }
+}
+
+output "config" {
+  value = "${jsonencode(local.config)}"
+}
+
+output "kubeconfig_command" {
+  value = "cd infrastructure/digitalocean/ && terraform output kubeconfig > $$KUBECONFIG"
+}
+
+output "kubeconfig" {
+  description = "kubectl config as generated by the module."
+  value       = "${module.cluster.kubeconfig}"
+}

demo/infrastructure/digitalocean/providers.tf

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+provider "digitalocean" {}
+
+variable "digitalocean_region" {
+  default = "fra1"
+}
+
+variable "cluster_version" {
+  default = "1.12.8-do.1"
+}
+
+module "cluster" {
+  source = "../modules/digitalocean-cluster"
+  suffix = "${random_id.suffix.hex}"
+
+  cluster_version = "${var.cluster_version}"
+  region          = "${var.digitalocean_region}"
+}

demo/infrastructure/digitalocean/secrets.tf

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+module "gangway" {
+  source = "../modules/gangway"
+  length = 24
+}

demo/infrastructure/digitalocean/suffix.tf

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+resource "random_id" "suffix" {
+  byte_length = 4
+}

demo/infrastructure/modules/digitalocean-cluster/cluster.tf

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+variable "region" {}
+variable "suffix" {}
+variable "cluster_version" {}
+
+locals {
+  cluster_name = "cluster-${var.suffix}"
+}
+
+resource "digitalocean_kubernetes_cluster" "cluster" {
+  name    = "${local.cluster_name}"
+  version = "${var.cluster_version}"
+  region  = "${var.region}"
+
+  node_pool {
+    name       = "default-pool"
+    size       = "s-2vcpu-2gb"
+    node_count = 3
+  }
+}

demo/infrastructure/modules/digitalocean-cluster/outputs.tf

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+output "kubeconfig" {
+  value = "${digitalocean_kubernetes_cluster.cluster.kube_config.0.raw_config}"
+}