[stage-2] add cluster terraform-configuration

terraform/cluster.tf

@@ -0,0 +1,38 @@
+resource "random_shuffle" "netology-gw-subnet-random" {
+  input        = [yandex_vpc_subnet.netology-gw-subnet-a.id, yandex_vpc_subnet.netology-gw-subnet-b.id]
+  result_count = 1
+}
+
+resource "yandex_compute_instance" "k8s-cluster" {
+  for_each = toset(["control", "node01", "node2"])
+
+  name = each.key
+
+  resources {
+    cores  = 2
+    memory = 2
+  }
+
+  boot_disk {
+    initialize_params {
+      image_id = "fd8kdq6d0p8sij7h5qe3" # ubuntu-20-04-lts-v20220822
+      size = "20"
+    }
+  }
+
+  network_interface {
+    subnet_id = random_shuffle.netology-gw-subnet-random.result
+    nat       = true
+  }
+
+  metadata = {
+    ssh-keys = "ubuntu:${file("~/.ssh/id_rsa.pub")}"
+  }
+}
+
+output "cluster_ips" {
+  value = {
+    internal = values(yandex_compute_instance.k8s-cluster)[*].network_interface.0.ip_address
+    external = values(yandex_compute_instance.k8s-cluster)[*].network_interface.0.nat_ip_address
+  }
+}