fixed bugs for attached RDS

.gitignore

@@ -10,7 +10,7 @@
 roles/main_infra/files/backend.tfvars
 roles/main_infra/files/remote-backend-selector.tf
 roles/main_infra/files/terraform.tfvars
-
+*.backup
 
 # Sensitive information
 /*.privkey

README.md

@@ -189,8 +189,16 @@ You can easily manipulate your deployment from any machine with sufficient prere
 
 ## Attaching the existing RDS instance to the current deployment
 
-In some cases you may want not to create a new database, but to add the existing one to use within the deployment. In order to do that configure all the proper values at `group_vars/all.yml` including yours DB ID and name and execute the `ansible-playbook attach_existing_rds.yml` command. This will add the current DB instance into TF managed resource group. After that run `ansible-playbook deploy.yml` as usually. 
+In some cases you may want not to create a new database, but to add the existing one to use within the deployment. In order to do that configure all the proper values at `group_vars/all.yml` including yours DB ID and name and execute the `ansible-playbook attach_existing_rds.yml` command. This will add the current DB instance into Terraform-managed resource group. After that run `ansible-playbook deploy.yml` as usually. 
 
+Note 1: that this action includes creating the S3 and DynamoDB (if `backend` variable is set to `true`) to store Terraform state files. 
+
+Note 2: the actual name of your resource must include prefix that you will use in this deployment!
+Example:
+  Real resource: tf-poa
+  prefix variable: tf
+  db_id variable: poa
+   
 ## Common Errors and Questions
 
 ### S3: 403 error during provisioning

attach_existing_rds.yml

@@ -5,6 +5,10 @@
     - { role: s3, when: "backend|bool == true" }
     - { role: dynamodb, when: "backend|bool == true" }
     - { role: attach_existing_rds }
+  vars_prompt:
+    - name: "confirmation"
+      prompt: "Are you sure you want to attach the existing RDS? If backend variable is set to True, this action includes creating the S3 and DynamoDB table for storing Terraform state files."
+      default: False
   environment:
     AWS_ACCESS_KEY_ID: "{{ aws_access_key }}"
     AWS_SECRET_ACCESS_KEY: "{{ aws_secret_key }}"

group_vars/all.yml.example

@@ -36,7 +36,6 @@ prefix: "sokol"
 
 ## The following settings are related to the RDS instance which will be created during deployment 
 db_id: "poa"
-db_name: "poa"
 db_username: "username"
 db_password: "qwerty12345"
 db_instance_class: "db.m4.xlarge"

roles/attach_existing_rds/tasks/main.yml

@@ -24,10 +24,10 @@
   when: backend|bool == true
 
 #Workaround since terraform module return unexpected error.
-- name: Terraform provisioning
+- name: Attach RDS to the current deployment
   shell: "echo yes | {{ terraform_location }} {{ item }}"
   args:
     chdir: "roles/main_infra/files"
   with_items:
     - "init{{ ' -backend-config=backend.tfvars' if backend|bool == true else '' }}"
-    - "import aws_db_instance.default {{ db_id }}"
+    - "import aws_db_instance.default {{ prefix }}-{{ db_id }}"

roles/main_infra/files/rds.tf

@@ -1,5 +1,4 @@
 resource "aws_db_instance" "default" {
-  name                   = "${var.prefix}-${var.db_name}"
   identifier             = "${var.prefix}-${var.db_id}"
   engine                 = "postgres"
   engine_version         = "10.5"

roles/main_infra/files/variables.tf

@@ -45,7 +45,6 @@ variable "chain_network_icon" {
 }
 
 variable "db_id" {}
-variable "db_name" {}
 variable "db_username" {}
 variable "db_password" {}
 variable "db_storage" {}

roles/main_infra/tasks/main.yml

@@ -35,11 +35,11 @@
 
 - name: Show Terraform plan
   debug:
-    var: tf_plan.stdout_lines
+    var: tf_plan.results[1].stdout_lines
 
 - name: User prompt
   pause:
-    prompt: "Are you absolutely sure you want to execute the deployment plan shown above? [Yes/No] Default: No"
+    prompt: "Are you absolutely sure you want to execute the deployment plan shown above? [False]"
   register: user_answer
 
 - name: Terraform provisioning

roles/main_infra/templates/terraform.tfvars.j2

@@ -11,7 +11,6 @@ root_block_size       = "{{ root_block_size }}"
 pool_size             = "{{ pool_size }}"
 
 db_id                 = "{{ db_id }}"
-db_name               = "{{ db_name }}"
 db_username           = "{{ db_username }}"
 db_password           = "{{ db_password }}"
 db_instance_class     = "{{ db_instance_class }}"