Add field node_pool_defaults to resource_container_cluster. (#6488) (#12452)

* Support enabling GKE image streaming at the cluster level. See #10509

* minor fix to schemaGcfsConfig method.

* Support update node pool default configuration at the cluster level.

* Address comments from GoogleCloudPlatform/magic-modules#6488.

Signed-off-by: Modular Magician <[email protected]>

Signed-off-by: Modular Magician <[email protected]>

Author: modular-magician

.changelog/6488.txt

@@ -0,0 +1,4 @@
+```release-note:enhancement
+container: added field `node_pool_defaults` to `resource_container_cluster`.
+
+```

google/node_config.go

@@ -16,6 +16,26 @@ var defaultOauthScopes = []string{
 	"https://www.googleapis.com/auth/trace.append",
 }
 
+func schemaGcfsConfig(forceNew bool) *schema.Schema {
+	return &schema.Schema{
+		Type:        schema.TypeList,
+		Optional:    true,
+		MaxItems:    1,
+		Description: `GCFS configuration for this node.`,
+		ForceNew:    forceNew,
+		Elem: &schema.Resource{
+			Schema: map[string]*schema.Schema{
+				"enabled": {
+					Type:        schema.TypeBool,
+					Required:    true,
+					ForceNew:    forceNew,
+					Description: `Whether or not GCFS is enabled`,
+				},
+			},
+		},
+	}
+}
+
 func schemaNodeConfig() *schema.Schema {
 	return &schema.Schema{
 		Type:        schema.TypeList,
@@ -104,23 +124,7 @@ func schemaNodeConfig() *schema.Schema {
 					Description:  `The number of local SSD disks to be attached to the node.`,
 				},
 
-				"gcfs_config": {
-					Type:        schema.TypeList,
-					Optional:    true,
-					MaxItems:    1,
-					Description: `GCFS configuration for this node.`,
-					ForceNew:    true,
-					Elem: &schema.Resource{
-						Schema: map[string]*schema.Schema{
-							"enabled": {
-								Type:        schema.TypeBool,
-								Required:    true,
-								ForceNew:    true,
-								Description: `Whether or not GCFS is enabled`,
-							},
-						},
-					},
-				},
+				"gcfs_config": schemaGcfsConfig(true),
 
 				"gvnic": {
 					Type:        schema.TypeList,

website/docs/r/container_cluster.html.markdown

@@ -269,6 +269,8 @@ region are guaranteed to support the same version.
     [autopilot](https://cloud.google.com/kubernetes-engine/docs/concepts/autopilot-overview#comparison) clusters and
     [node auto-provisioning](https://cloud.google.com/kubernetes-engine/docs/how-to/node-auto-provisioning)-enabled clusters. Structure is [documented below](#nested_node_pool_auto_config).
 
+* `node_pool_defaults` - (Optional, [Beta](https://terraform.io/docs/providers/google/guides/provider_versions.html)) Default NodePool settings for the entire cluster. These settings are overridden if specified on the specific NodePool object. Structure is [documented below](#nested_node_pool_defaults).
+
 * `node_version` - (Optional) The Kubernetes version on the nodes. Must either be unset
     or set to the same value as `min_master_version` on create. Defaults to the default
     version set by GKE which is not necessarily the latest version. This only affects
@@ -867,6 +869,13 @@ node_pool_auto_config {
 }
 ```
 
+<a name="nested_node_pool_defaults"></a>The `node_pool_defaults` block supports:
+* `node_config_defaults` (Optional, [Beta](https://terraform.io/docs/providers/google/guides/provider_versions.html)) - Subset of NodeConfig message that has defaults.
+
+The `node_config_defaults` block supports:
+
+* `gcfs_config` (Optional) The default Google Container Filesystem (GCFS) configuration at the cluster level. e.g. enable [image streaming](https://cloud.google.com/kubernetes-engine/docs/how-to/image-streaming) across all the node pools within the cluster. Structure is [documented below](#nested_gcfs_config).
+
 <a name="nested_notification_config"></a>The `notification_config` block supports:
 
 * `pubsub` (Required) - The pubsub config for the cluster's upgrade notifications.