Added GCS backend for remote .tfstate storage

- Fixed terraform render in kite generate

lib/kite/core.rb

@@ -19,12 +19,8 @@ def generate()
 
       case options[:cloud]
       when 'aws'
-        copy_file('aws/terraform/main.tf',                 'terraform/main.tf')
-        copy_file('aws/terraform/network.tf',              'terraform/network.tf')
-        copy_file('aws/terraform/outputs.tf',              'terraform/outputs.tf')
-        copy_file('aws/terraform/variables.tf',            'terraform/variables.tf')
-        template('aws/terraform/terraform.tfvars.erb',     'terraform/terraform.tfvars')
-        copy_file('aws/README.md',                         'README.md')
+        directory('aws/terraform',                          'terraform')
+        copy_file('aws/README.md',                          'README.md', force: true)
 
         template('aws/bosh-install.sh.erb',                 'bin/bosh-install.sh')
         template('aws/setup-tunnel.sh.erb',                 'bin/setup-tunnel.sh')
@@ -35,11 +31,7 @@ def generate()
         chmod('bin/setup-tunnel.sh', 0755)
 
       when 'gcp'
-        copy_file('gcp/terraform/main.tf',                  'terraform/main.tf')
-        copy_file('gcp/terraform/network.tf',               'terraform/network.tf')
-        copy_file('gcp/terraform/outputs.tf',               'terraform/outputs.tf')
-        copy_file('gcp/terraform/variables.tf',             'terraform/variables.tf')
-        template('gcp/terraform/terraform.tfvars.erb',      'terraform/terraform.tfvars')
+        directory('gcp/terraform',                          'terraform')
         copy_file('gcp/README.md',                          'README.md', force: true)
 
         template('gcp/bosh-install.sh.erb',                 'bin/bosh-install.sh')

tpl/gcp/README.md

@@ -1,6 +1,12 @@
 ## GCP Cloud
 
 ### Usage
+
+Set path to your service account credentials:
+```
+export GOOGLE_CREDENTIALS=*~/credentials/service-account.json*
+```
+
 Apply terraform code
 ```
 pushd terraform && terraform init && terraform apply && popd

tpl/gcp/terraform/gcs.tf.tt

@@ -0,0 +1,24 @@
+# Setup Terraform backend to be able to store .tfstate remotely
+terraform {
+  backend "gcs" {
+    bucket  = "<%= @values['gcp']['tfstate_bucket_name'] %>"
+    path    = "terraform.tfstate"
+    project = "<%= @values['gcp']['project'] %>"
+  }
+}
+
+# Create GCS bucket to store .tfstate in
+resource "google_storage_bucket" "tfstate-bucket" {
+  name = "<%= @values['gcp']['tfstate_bucket_name'] %>"
+  location = "<%= @values['gcp']['region'] %>"
+}
+
+# Store .tfstate in a GCS bucket
+data "terraform_remote_state" "tfstate" {
+  backend = "gcs"
+  config {
+    bucket  = "<%= @values['gcp']['tfstate_bucket_name'] %>"
+    path    = "terraform.tfstate"
+    project = "<%= @values['gcp']['project'] %>"
+  }
+}

tpl/skel/config/cloud.yml

@@ -23,6 +23,7 @@ gcp:
   region: "europe-west1"
   zone: "europe-west1-b"
   service_account: "~/safe/terraform.json"
+  tfstate_bucket_name: "test-tfstate-bucket"
   vpc_name: "platform-tools"
   subnet_name: "platform-net"
   subnet_cidr: "10.0.0.0/24"