diff --git a/deploy/gcp/README.md b/deploy/gcp/README.md
index c05486a1f8..0715ea95af 100644
--- a/deploy/gcp/README.md
+++ b/deploy/gcp/README.md
@@ -26,11 +26,11 @@ The default setup will create a new VPC, two subnetworks, and an f1-micro instan
 
 The terraform script expects three environment variables. You can let Terraform prompt you for them, or `export` them ahead of time. If you choose to export them, they are:
 
-* `TF_VAR_GCP_CREDENTIALS_PATH`: Path to a valid GCP credentials file
+* `TF_VAR_GCP_CREDENTIALS_PATH`: Path to a valid GCP credentials file. It is generally considered a good idea to create a service account to be used by Terraform. See [this page](https://cloud.google.com/iam/docs/creating-managing-service-accounts) for more information on how to manage them. See [this page](https://cloud.google.com/iam/docs/creating-managing-service-account-keys) for creating and managing service account keys which, when downloaded, will be the needed credentials file.
 * `TF_VAR_GCP_REGION`: The region to create the resources in, for example: `us-west1`
 * `TF_VAR_GCP_PROJECT`: The name of the GCP project
 
-It is generally considered a good idea to create a service account to be used by Terraform. See https://cloud.google.com/iam/docs/creating-managing-service-accounts for more information on how to manage them.
+
 
 The service account should have sufficient permissions to create resources in the project. The `Project Editor` primitive will accomplish this.
 
diff --git a/deploy/gcp/main.tf b/deploy/gcp/main.tf
index 6d02925662..a10aeeb5a9 100644
--- a/deploy/gcp/main.tf
+++ b/deploy/gcp/main.tf
@@ -316,6 +316,10 @@ EOS
 resource "null_resource" "deploy-tidb-cluster" {
   depends_on = ["null_resource.setup-env", "local_file.tidb-cluster-values", "google_container_node_pool.pd_pool", "google_container_node_pool.tikv_pool", "google_container_node_pool.tidb_pool"]
 
+  triggers {
+    values = "${data.template_file.tidb_cluster_values.rendered}"
+  }
+
   provisioner "local-exec" {
     command = <<EOS
 helm upgrade --install tidb-cluster ${path.module}/charts/tidb-cluster --namespace=tidb -f ${local.tidb_cluster_values_path}
diff --git a/deploy/gcp/outputs.tf b/deploy/gcp/outputs.tf
index 69dd56a015..33f4ca2f83 100644
--- a/deploy/gcp/outputs.tf
+++ b/deploy/gcp/outputs.tf
@@ -22,10 +22,18 @@ output "tidb_ilb_ip" {
   value = "${data.external.tidb_ilb_ip.result["ip"]}"
 }
 
+output "tidb_port" {
+  value = "${data.external.tidb_port.result["port"]}"
+}
+
 output "monitor_ilb_ip" {
   value = "${data.external.monitor_ilb_ip.result["ip"]}"
 }
 
+output "monitor_port" {
+  value = "${data.external.monitor_port.result["port"]}"
+}
+
 output "how_to_ssh_to_bastion" {
   value = "gcloud compute ssh bastion --zone ${var.GCP_REGION}-a"
 }