Add documentation for GKE node pools (#12896)

website/source/docs/providers/google/r/container_node_pool.html.markdown

@@ -0,0 +1,69 @@
+---
+layout: "google"
+page_title: "Google: google_container_node_pool"
+sidebar_current: "docs-google-container-node-pool"
+description: |-
+  Manages a GKE NodePool resource.
+---
+
+# google\_container\_node\_pool
+
+Manages a Node Pool resource within GKE. For more information see
+[the official documentation](https://cloud.google.com/container-engine/docs/node-pools)
+and
+[API](https://cloud.google.com/container-engine/reference/rest/v1/projects.zones.clusters.nodePools).
+
+## Example usage
+
+```tf
+resource "google_container_node_pool" "np" {
+  name               = "my-node-pool"
+  zone               = "us-central1-a"
+  cluster            = "${google_container_cluster.primary.name}"
+  initial_node_count = 3
+}
+
+resource "google_container_cluster" "primary" {
+  name               = "marcellus-wallace"
+  zone               = "us-central1-a"
+  initial_node_count = 3
+
+  additional_zones = [
+    "us-central1-b",
+    "us-central1-c",
+  ]
+
+  master_auth {
+    username = "mr.yoda"
+    password = "adoy.rm"
+  }
+
+  node_config {
+    oauth_scopes = [
+      "https://www.googleapis.com/auth/compute",
+      "https://www.googleapis.com/auth/devstorage.read_only",
+      "https://www.googleapis.com/auth/logging.write",
+      "https://www.googleapis.com/auth/monitoring",
+    ]
+  }
+}
+```
+
+## Argument Reference
+
+* `zone` - (Required) The zone in which the cluster resides.
+
+* `cluster` - (Required) The cluster to create the node pool for.
+
+* `initial_node_count` - (Required) The initial node count for the pool.
+
+- - -
+
+* `project` - (Optional) The project in which to create the node pool. If blank,
+    the provider-configured project will be used.
+
+* `name` - (Optional) The name of the node pool. If left blank, Terraform will
+    auto-generate a unique name.
+
+* `name_prefix` - (Optional) Creates a unique name for the node pool beginning
+    with the specified prefix. Conflicts with `name`.