Final test version pushing with readme

.github/workflows/terraform-deploy.yml

@@ -19,11 +19,11 @@ jobs:
           terraform_version: 1.5.7
 
       - name: Configure AWS credentials
-        run: |
-          mkdir -p ~/.aws
-          echo "[default]" > ~/.aws/credentials
-          echo "aws_access_key_id=${{ secrets.AWS_ACCESS_KEY_ID }}" >> ~/.aws/credentials
-          echo "aws_secret_access_key=${{ secrets.AWS_SECRET_ACCESS_KEY }}" >> ~/.aws/credentials
+        uses: aws-actions/configure-aws-credentials@v2
+        with:
+          aws-access-key-id: ${{ secrets.AWS_ACCESS_KEY_ID }}
+          aws-secret-access-key: ${{ secrets.AWS_SECRET_ACCESS_KEY }}
+          aws-region: "ap-southeast-1"
 
       - name: Initialize Terraform
         run: terraform init
@@ -38,6 +38,7 @@ jobs:
         run: terraform plan
 
       - name: Run terraform plan
+        #run: terraform apply -auto-approve # Mahaveer - Don't want to run from Github Action automatically as I have tested it manually , submitting just for assesment
         run: terraform apply
 
   destroy:
@@ -46,3 +47,4 @@ jobs:
     steps:
       - name: Manual Step - Destroy Infrastructure
         run: terraform destroy
+        #run: terraform destroy -auto-approve # Mahaveer - Don't want to run from Github Action automatically as I have tested it manually , submitting just for assesment

.gitignore

@@ -31,4 +31,6 @@ override.tf.json
 
 # Ignore CLI configuration files
 .terraformrc
-terraform.rc
+terraform.rc
+
+*.lock.hcl

README.md

@@ -1 +1,34 @@
-# AWS_LB_WITH_TF_PIPELINE
+# Project 
+Load Balancer in AWS
+
+# Solution Diagram
+  ![plot](./docs/soliution_diagram.drawio.png)
+
+
+
+# Tested on 
+ - Terraform version : 1.5.7
+ - aws provider version :  5.39.0
+ - AWS Free Tier
+
+# What it does
+ 1. Creates VPC , Private & Public Subnets, Creates ALB with Autoscaling 
+ 2. Runs a pipeline in GitHub Actions whenever code is pushed to main branch
+
+
+# Output
+1. Tested locally and it can run automatically on GitHub Actions , didn't apply as it'll incur cost
+
+  ![plot](./docs/Terraform_successful_apply.png)
+
+2. Nginx Web Server running through LB
+
+  ![plot](./docs/NginxOnLB.png)
+
+3. Loadbalancer in AWS
+
+  ![plot](./docs/LOadBalancer.png)
+
+4. Desired EC2 instances running in AWS
+
+  ![plot](./docs/EC2_instances.png)

elb.tf

@@ -1,5 +1,5 @@
 resource "aws_lb" "mv_lb" {
-  name               = "sharmi-lb-asg"
+  name               = "mahaveer-lb-asg"
   internal           = false
   load_balancer_type = "application"
   security_groups    = [aws_security_group.mv_sg_for_elb.id]
@@ -61,9 +61,9 @@ resource "aws_launch_template" "mv_ec2_launch_templ" {
 
 resource "aws_autoscaling_group" "mv_asg" {
   # no of instances
-  desired_capacity = 1
-  max_size         = 1
-  min_size         = 1
+  desired_capacity = var.desired_capacity
+  max_size         = var.max_size
+  min_size         = var.min_size
 
   # source
   target_group_arns = [aws_lb_target_group.mv_alb_tg.arn]

network.tf

@@ -8,7 +8,7 @@ resource "aws_vpc" "my_vpc" {
 resource "aws_subnet" "pub_subnets" {
   for_each                = { for idx, zone in var.availability_zone : idx => zone }
   vpc_id                  = aws_vpc.my_vpc.id
-  cidr_block              = "10.0.${each.key}.0/24" # Adjust CIDR block as needed
+  cidr_block              = "10.0.${each.key}.0/24" # Distributing IPs
   map_public_ip_on_launch = true
   availability_zone       = each.value
   tags = {
@@ -20,7 +20,7 @@ resource "aws_subnet" "pub_subnets" {
 resource "aws_subnet" "pvt_subnets" {
   for_each          = { for idx, zone in var.availability_zone : idx => zone }
   vpc_id            = aws_vpc.my_vpc.id
-  cidr_block        = "10.0.${each.key + 2}.0/24" # Adjust CIDR block as needed
+  cidr_block        = "10.0.${each.key + 2}.0/24" # Distributing IPs
   availability_zone = each.value
   tags = {
     "Name" = "PRIVATE_SUBNET_${each.value}"

output.tf

@@ -0,0 +1,3 @@
+output "dns" {
+   value =  aws_lb.mv_lb.dns_name
+}

user_data.sh

@@ -1,5 +1,5 @@
 #!/bin/bash
 #sudo yum update -y
 sudo yum install -y nginx
-echo "<h1>Hello from $(hostname -f)</h1>" > /var/www/html/index.html
-service nginx start
+service nginx start
+echo "<h1>Hello from Mahaveer's Nginx Web Server running at $(hostname -f)</h1>" > /var/www/html/index.html

variables.tf

@@ -14,4 +14,22 @@ variable "sg_ports_for_internet" {
   type    = list(number)
   default = [80, 443] # 80 -> http, 443 -> https
   description = "List of allowed ports accessible through LB."
-}
+}
+
+variable "desired_capacity" {
+  type = number
+  default = 2  
+  description = "Desired target number of instances the group aims to keep available"
+}
+
+variable "max_size" {
+  type = number
+  default = 2  
+  description = "Maximum number of instances the Auto Scaling Group can ever launch."
+}
+
+variable "min_size" {
+  type = number
+  default = 1
+  description = "Minimum number of instances the Auto Scaling Group "
+}