DOPS-101 Add variable for account alias for main terraform project

This alias needs to match the one used in bootstrap project to use
correct names for S3 bucket and DynamoDB table.

Author: akagr

bin/common-terraform.sh

@@ -51,10 +51,8 @@ function init_terraform() {
     #shellcheck disable=SC2086,SC2046
     $DOCKER_TERRAFORM init \
         -input="$INPUT_ENABLED" \
-        -backend-config bucket=tf-state.${PROJECT_NAME}.${AWS_DEFAULT_REGION}.$(get_aws_account_id) \
-        -backend-config dynamodb_table=TerraformStatelock-${PROJECT_NAME} \
-        -backend-config region=${AWS_DEFAULT_REGION} \
-        -backend-config encrypt=true
+        -backend-config region=${AWS_DEFAULT_REGION}
+
     # Generate an SSH keypair if none exists yet
     if [[ ! -f ~/.ssh/id_rsa.pub ]]; then
         #shellcheck disable=SC2174

terraform/terraform.tf

@@ -4,10 +4,10 @@ terraform {
   # ./bootstrap project. See ./bootstrap/README.md for details.
   #===================================================================
   backend "s3" {
-    bucket         = "moduscreate-devops-demo-tf-state-us-east-1"
+    bucket         = "${var.backend_account_alias}-tf-state-us-east-1"
     key            = "terraform-state.tfstate"
-    dynamodb_table = "moduscreate-devops-demo-state-lock"
-    region         = "us-east-1"
+    dynamodb_table = "${var.backend_account_alias}-state-lock"
+    region         = "${var.aws_region}"
     encrypt        = "true"
   }
 }

terraform/variables.tf

@@ -111,3 +111,8 @@ variable "newrelic_alert_email" {
   description = "New Relic alert email"
   default     = ""
 }
+
+variable "backend_account_alias" {
+  description = "Account alias, or prefix, used by bootstrap project"
+  default     = "moduscreate-devops-demo"
+}