Feature update backend (#3)

* Update Terraform backend configuration and add backend.conf sample

---------

Co-authored-by: Damien A <sepales.pret0h@icloud.com>

.gitignore

@@ -43,3 +43,4 @@ network_images/*.tar.xz
 .vscode/settings.json
 .vscode
 ansible/clab_vars.yml
+terraform/backend.conf

README.md

@@ -56,7 +56,7 @@ Before you begin, ensure you have the following prerequisites installed and conf
 
     ```bash
     cd terraform
-    terraform init
+    terraform init --backend-config="backend.conf"
     ```
 
 4. **Apply Terraform Configuration**

terraform/README.md

@@ -10,22 +10,27 @@ This directory contains the Terraform configuration files for deploying an AWS E
 
 ## Configuration
 
-1. **Set AWS Credentials and Variables**
+1. **Backend Configuration**
 
-   Rename the `terraform.tfvars.sample` to `terraform.tfvars` and update the following variables with your own values:
+    To easily manage the backend configuration, we will store the tfstate files on an S3 bucket.  
+    To update it, please adapt the `backend.conf` file, using the provided sample as a reference.
 
-   ```tfvars
-   AWS_ACCESS_KEY = "your_access_key"
-   AWS_SECRET_KEY = "your_secret_key"
-   AWS_KEY_NAME   = "your_key_pair_name"
-   AWS_KEY_LOCATION = "path_to_your_private_key"
-   ```
+2. **Set AWS Credentials and Variables**
+
+    Rename the `terraform.tfvars.sample` to `terraform.tfvars` and update the following variables with your own values:
+
+    ```tfvars
+    AWS_ACCESS_KEY = "your_access_key"
+    AWS_SECRET_KEY = "your_secret_key"
+    AWS_KEY_NAME   = "your_key_pair_name"
+    AWS_KEY_LOCATION = "path_to_your_private_key"
+    ```
 
     **Important** : Never commit `terraform.tfvars` to version control as it contains sensitive information.
 
-2. **Customize Terraform Variables**
+3. **Customize Terraform Variables**
 
-    You can customize the deployment by modifying the Terraform variables in `variables.tf`.
+  You can customize the deployment by modifying the Terraform variables in `variables.tf`.
 
 ## Action made by the EC2.tf file
 

terraform/backend.conf.sample

@@ -0,0 +1,3 @@
+bucket = "YOUR_UNIQUE_BUCKET_NAME"
+key    = "YOUR_OBJECT_KEY"
+region = "YOUR_REGION"

terraform/ec2.tf

@@ -1,9 +1,3 @@
-provider "aws" {
-  region     = var.AWS_REGION
-  access_key = var.AWS_ACCESS_KEY
-  secret_key = var.AWS_SECRET_KEY
-}
-
 resource "aws_security_group" "netlab_sg" {
   name = "netlab_sg"
 

terraform/provider.tf

@@ -0,0 +1,9 @@
+provider "aws" {
+  region     = var.AWS_REGION
+  access_key = var.AWS_ACCESS_KEY
+  secret_key = var.AWS_SECRET_KEY
+}
+
+terraform {
+  backend "s3" {}
+}