added application load balacer example

Author: easyawslearn

terraform-aws-elb-alb/elb.tf

@@ -0,0 +1,52 @@
+provider "aws" {
+ region = var.region
+}
+
+resource "aws_lb" "elb_example" {
+ name = "elb"
+ internal = false
+ load_balancer_type = "application"
+ security_groups = [aws_security_group.elb_sg.id]
+ subnets = [aws_subnet.public_1.id,aws_subnet.public_2.id]
+
+ enable_deletion_protection = true
+ tags = {
+ Environment = "elb-example"
+ }
+}
+
+resource "aws_lb_target_group" "test" {
+ name = "tf-example-lb-tg"
+ port = 80
+ protocol = "HTTP"
+ target_type="instance"
+ vpc_id = aws_vpc.vpc_demo.id
+}
+
+resource "aws_lb_target_group_attachment" "test" {
+ target_group_arn = aws_lb_target_group.test.arn
+ target_id = aws_instance.elb_instance_example1.id
+ port = 80
+}
+resource "aws_lb_target_group_attachment" "test1" {
+ target_group_arn = aws_lb_target_group.test.arn
+ target_id = aws_instance.elb_instance_example2.id
+ port = 80
+}
+
+resource "aws_lb_listener" "front_end" {
+ load_balancer_arn = aws_lb.elb_example.arn
+ port = "80"
+ protocol = "HTTP"
+
+ default_action {
+ type = "forward"
+ target_group_arn = aws_lb_target_group.test.arn
+
+ }
+}
+
+output "elb_example" {
+ description = "The DNS name of the ELB"
+ value = aws_lb.elb_example.dns_name
+}

terraform-aws-elb-alb/instances.tf

@@ -0,0 +1,49 @@
+resource "aws_instance" "elb_instance_example1" {
+ ami = lookup(var.ami_id, var.region)
+ instance_type = var.instance_type
+ subnet_id = aws_subnet.public_1.id
+
+ # Security group assign to instance
+ vpc_security_group_ids = [aws_security_group.elb_sg.id]
+
+ # key name
+ key_name = var.key_name
+
+ user_data = <<EOF
+#! /bin/bash
+ sudo yum update -y
+sudo yum install -y httpd.x86_64
+sudo service httpd start
+sudo service httpd enable
+echo "<h1>Deployed ELB Instance Example 1</h1>" | sudo tee /var/www/html/index.html
+EOF
+
+ tags = {
+ Name = "EC2-Instance-1"
+ }
+}
+
+resource "aws_instance" "elb_instance_example2" {
+ ami = lookup(var.ami_id, var.region)
+ instance_type = var.instance_type
+ subnet_id = aws_subnet.public_1.id
+
+ # Security group assign to instance
+ vpc_security_group_ids = [aws_security_group.elb_sg.id]
+
+ # key name
+ key_name = var.key_name
+
+ user_data = <<EOF
+#! /bin/bash
+ sudo yum update -y
+sudo yum install -y httpd.x86_64
+sudo service httpd start
+sudo service httpd enable
+echo "<h1>Deployed ELB Instance Example 2</h1>" | sudo tee /var/www/html/index.html
+EOF
+
+ tags = {
+ Name = "EC2-Instance-1"
+ }
+}

terraform-aws-elb-alb/route53.tf

@@ -0,0 +1,19 @@
+resource "aws_route53_zone" "easy_aws" {
+ name = "easyaws.in"
+
+ tags = {
+ Environment = "dev"
+ }
+}
+
+resource "aws_route53_record" "www" {
+ zone_id = aws_route53_zone.easy_aws.zone_id
+ name = "www.easyaws.in"
+ type = "A"
+ ttl = "300"
+ records = [aws_lb.elb_example.dns_name]
+}
+
+output "name_server"{
+ value=aws_route53_zone.easy_aws.name_servers
+}

terraform-aws-elb-alb/security_group.tf

@@ -0,0 +1,28 @@
+resource "aws_security_group" "elb_sg" {
+ name = "allow_SSH"
+ description = "Allow SSH inbound traffic"
+ vpc_id = aws_vpc.vpc_demo.id
+
+ ingress {
+ # SSH Port 22 allowed from any IP
+ from_port = 22
+ to_port = 22
+ protocol = "tcp"
+ cidr_blocks = ["0.0.0.0/0"]
+ }
+
+ ingress {
+ # SSH Port 22 allowed from any IP
+ from_port = 80
+ to_port = 80
+ protocol = "tcp"
+ cidr_blocks = ["0.0.0.0/0"]
+ }
+
+ egress {
+ from_port = 0
+ to_port = 0
+ protocol = "-1"
+ cidr_blocks = ["0.0.0.0/0"]
+ }
+}

terraform-aws-elb-alb/variables.tf

@@ -0,0 +1,55 @@
+variable "region" {
+ type = "string"
+ default = "us-east-1"
+}
+variable "ami_id" {
+ type = "map"
+ default = {
+ us-east-1 = "ami-035b3c7efe6d061d5"
+ us-east-2 = "ami-02ccb28830b645a41"
+ eu-central-1 = "ami-9787h5h6nsn75gd33"
+ }
+}
+variable "instance_type" {
+ type = "string"
+ default = "t2.micro"
+}
+variable "key_name" {
+ type = "string"
+ default = "ec2-demo"
+}
+
+variable "cidr" {
+ description = "The CIDR block for the VPC. Default value is a valid CIDR, but not acceptable by AWS and should be overridden"
+ type = string
+ default = "10.0.0.0/16"
+}
+variable "instance_tenancy" {
+ description = "A tenancy option for instances launched into the VPC"
+ type = string
+ default = "default"
+}
+
+variable "enable_dns_hostnames" {
+ description = "Should be true to enable DNS hostnames in the VPC"
+ type = bool
+ default = true
+}
+
+variable "enable_dns_support" {
+ description = "Should be true to enable DNS support in the VPC"
+ type = bool
+ default = true
+}
+
+variable "enable_classiclink" {
+ description = "Should be true to enable ClassicLink for the VPC. Only valid in regions and accounts that support EC2 Classic."
+ type = bool
+ default = false
+}
+
+variable "tags" {
+ description = "A map of tags to add to all resources"
+ type = string
+ default = "Vpc-custom-demo"
+}

terraform-aws-elb-alb/vpc.tf

@@ -0,0 +1,64 @@
+resource "aws_vpc" "vpc_demo" {
+ cidr_block = var.cidr
+ instance_tenancy = var.instance_tenancy
+ enable_dns_hostnames = var.enable_dns_hostnames
+ enable_dns_support = var.enable_dns_support
+ enable_classiclink = var.enable_classiclink
+
+ tags = {
+ Name = var.tags
+ }
+}
+
+resource "aws_internet_gateway" "gw" {
+ vpc_id = aws_vpc.vpc_demo.id
+
+ tags = {
+ Name = "internet-gateway-demo"
+ }
+}
+
+resource "aws_subnet" "public_1" {
+ availability_zone = "us-east-1a"
+ vpc_id = aws_vpc.vpc_demo.id
+ map_public_ip_on_launch = true
+ cidr_block = "10.0.1.0/24"
+
+ tags = {
+ Name = "public_1-demo"
+ }
+}
+
+resource "aws_subnet" "public_2" {
+ availability_zone = "us-east-1b"
+ vpc_id = aws_vpc.vpc_demo.id
+ map_public_ip_on_launch = true
+ cidr_block = "10.0.2.0/24"
+
+ tags = {
+ Name = "public_1-demo"
+ }
+}
+
+resource "aws_route_table" "route-public" {
+ vpc_id = aws_vpc.vpc_demo.id
+
+ route {
+ cidr_block = "10.0.0.0/0"
+ gateway_id = aws_internet_gateway.gw.id
+ }
+
+ tags = {
+ Name = "public-route-table-demo"
+ }
+}
+
+resource "aws_route_table_association" "public_1" {
+ subnet_id = aws_subnet.public_1.id
+ route_table_id = aws_route_table.route-public.id
+}
+
+resource "aws_route_table_association" "public_2" {
+ subnet_id = aws_subnet.public_2.id
+ route_table_id = aws_route_table.route-public.id
+}