container: add support for kubelet read only port

- Add `no_enable_insecure_kubelet_readonly_port` to google_container_cluster
- Allow setting `insecure_kubelet_readonly_port_enabled` for
  `container_node_pool`

https://cloud.google.com/kubernetes-engine/docs/how-to/disable-kubelet-readonly-port

Fixes hashicorp/terraform-provider-google#15208

Author: wyardley

mmv1/third_party/terraform/services/container/go/node_config.go.tmpl

@@ -600,6 +600,11 @@ func schemaNodeConfig() *schema.Schema {
 								Optional: true,
 								Description: `Set the CPU CFS quota period value 'cpu.cfs_period_us'.`,
 							},
+							"insecure_kubelet_readonly_port_enabled": {
+								Type:     schema.TypeBool,
+								Optional: true,
+								Description: `Enable or disable Kubelet read only port.`,
+							},
 							"pod_pids_limit": {
 								Type:        schema.TypeInt,
 								Optional:    true,
@@ -1153,6 +1158,9 @@ func expandKubeletConfig(v interface{}) *container.NodeKubeletConfig {
 	if cpuCfsQuotaPeriod, ok := cfg["cpu_cfs_quota_period"]; ok {
 		kConfig.CpuCfsQuotaPeriod = cpuCfsQuotaPeriod.(string)
 	}
+	if insecureKubeletReadonlyPortEnabled, ok := cfg["insecure_kubelet_readonly_port_enabled"]; ok {
+		kConfig.insecureKubeletReadonlyPortEnabled = insecureKubeletReadonlyPortEnabled.(bool)
+	}
 	if podPidsLimit, ok := cfg["pod_pids_limit"]; ok {
 		kConfig.PodPidsLimit = int64(podPidsLimit.(int))
 	}

mmv1/third_party/terraform/services/container/resource_container_node_pool_test.go.erb

@@ -527,10 +527,12 @@ func TestAccContainerNodePool_withKubeletConfig(t *testing.T) {
 		CheckDestroy:             testAccCheckContainerClusterDestroyProducer(t),
 		Steps: []resource.TestStep{
 			{
-				Config: testAccContainerNodePool_withKubeletConfig(cluster, np, "static", "100ms", networkName, subnetworkName, true, 2048),
+				Config: testAccContainerNodePool_withKubeletConfig(cluster, np, "static", "100ms", networkName, subnetworkName, true, false, 2048),
 				Check: resource.ComposeTestCheckFunc(
 					resource.TestCheckResourceAttr("google_container_node_pool.with_kubelet_config",
 						"node_config.0.kubelet_config.0.cpu_cfs_quota", "true"),
+					resource.TestCheckResourceAttr("google_container_node_pool.with_kubelet_config",
+						"node_config.0.kubelet_config.0.insecure_kubelet_readonly_port_enabled", "false"),
 					resource.TestCheckResourceAttr("google_container_node_pool.with_kubelet_config",
 						"node_config.0.kubelet_config.0.pod_pids_limit", "2048"),
 				),
@@ -541,10 +543,12 @@ func TestAccContainerNodePool_withKubeletConfig(t *testing.T) {
 				ImportStateVerify: true,
 			},
 			{
-				Config: testAccContainerNodePool_withKubeletConfig(cluster, np, "", "", networkName, subnetworkName, false, 1024),
+				Config: testAccContainerNodePool_withKubeletConfig(cluster, np, "", "", networkName, subnetworkName, false, true, 1024),
 				Check: resource.ComposeTestCheckFunc(
 					resource.TestCheckResourceAttr("google_container_node_pool.with_kubelet_config",
 						"node_config.0.kubelet_config.0.cpu_cfs_quota", "false"),
+					resource.TestCheckResourceAttr("google_container_node_pool.with_kubelet_config",
+						"node_config.0.kubelet_config.0.insecure_kubelet_readonly_port_enabled", "true"),
 				),
 			},
 			{
@@ -3137,7 +3141,7 @@ resource "google_container_node_pool" "with_sandbox_config" {
 }
 <% end -%>
 
-func testAccContainerNodePool_withKubeletConfig(cluster, np, policy, period, networkName, subnetworkName string, quota bool, podPidsLimit int) string {
+func testAccContainerNodePool_withKubeletConfig(cluster, np, policy, period, networkName, subnetworkName string, quota bool, insecureKubeletReadonlyPortEnabled bool, podPidsLimit int) string {
 	return fmt.Sprintf(`
 data "google_container_engine_versions" "central1a" {
   location = "us-central1-a"
@@ -3163,10 +3167,11 @@ resource "google_container_node_pool" "with_kubelet_config" {
   node_config {
     image_type = "COS_CONTAINERD"
     kubelet_config {
-      cpu_manager_policy   = %q
-      cpu_cfs_quota        = %v
-      cpu_cfs_quota_period = %q
-      pod_pids_limit			 = %d
+      cpu_manager_policy                     = %q
+      cpu_cfs_quota                          = %v
+      cpu_cfs_quota_period                   = %q
+      insecure_kubelet_readonly_port_enabled = %v
+      pod_pids_limit                         = %d
     }
     oauth_scopes = [
       "https://www.googleapis.com/auth/logging.write",
@@ -4929,4 +4934,4 @@ resource "google_container_node_pool" "np" {
   }
 }
 `, cluster, np)
-}
+}