update gcp terraform config (google#2387)

* use gke version 1.19

* Changed cpu type to e2

* updated cluster name to match ci env

* added terrafrom change

Author: paulmattei

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## HEAD
 
+* GCP terraform script updated. GKE 1.19 and updated CPU type to E2
+
 ### Dependency updates
  * Upgraded to etcd v3 in order to allow grpc to be upgraded (#2195)
    * etcd was `v0.5.0-alpha.5`, now `v3.5.0-alpha.0`

deployment/main.tf

@@ -9,12 +9,12 @@ variable "region" {
 
 provider "google" {
   project = var.gcp_project
-  version = "~> v3.0.0-beta.1"
+  version = "~> 3.0.0-beta.1"
 }
 
 provider "google-beta" {
   project = var.gcp_project
-  version = "~> v3.0.0-beta.1"
+  version = "~> 3.0.0-beta.1"
 }
 
 # Enable required API in the project
@@ -32,20 +32,20 @@ resource "google_project_service" "spanner-api" {
 ## Force recent version for Kubernetes master
 data "google_container_engine_versions" "gke-ver" {
   location       = var.region
-  version_prefix = "1.14."
+  version_prefix = "1.19."
 }
 
 resource "google_container_cluster" "trillian-cluster" {
   provider           = google-beta
-  name               = "cluster"
+  name               = "trillian-opensource-ci"
   location           = var.region
   node_version       = data.google_container_engine_versions.gke-ver.latest_node_version
   min_master_version = data.google_container_engine_versions.gke-ver.latest_node_version
 
   initial_node_count = 3
 
   node_config {
-    machine_type = "n1-standard-2"
+    machine_type = "e2-standard-2"
     image_type   = "COS"
 
     workload_metadata_config {