this repo is an example of using ELB Elastic Load Balancing with ASG Auto Scaling Group to provide highly available and efficient Nodejs Apps

we will use ASG to launch a cluster of EC2 Instances, monitoring the health of each Instance, replacing failed Instances, and adjusting the size of the cluster in response to load.

• ASG distributes the EC2 instances across multiple availability zones
  • each AWS account has access to different set of Availability zones, in this repo, i've choosed all availability zones available in my account

after deploying the ASG you'll have several different servers, each with its own ip address, but you need to give your end users only a single IP to hit, and for this we're going to deploy a load balancer to distribute traffic accross your servers and to give your end users a single dns name which is the the load balancer dns name

For other platforms to install Terraform download the binray from the download page

https://www.terraform.io/downloads.html

yum -y install unzip

cd /tmp
wget https://releases.hashicorp.com/terraform/0.11.7/terraform_0.11.7_linux_amd64.zip
unzip terraform_0.11.7_linux_amd64.zip -d /usr/bin/

terraform -v

Insert your AWS access key & secret key as Environment Variables, In this way we're NOT setting them permanently, you'll need to run these commands again whenever you reopen your terminal

export AWS_ACCESS_KEY_ID=<your access key>
export AWS_SECRET_ACCESS_KEY=<your secret key>

yum -y install git

git clone https://github.com/Eslam-Naser/terraform-AWS-ASG-ELB.git
cd terraform-AWS-ASG-ELB/

# Downloading the Plugin for the AWS provider
terraform init

• See what's terraform is planning to do before really doing it

terraform plan

• build the terraform project

terraform apply
# yes | if you want to proceed

<public IPv4>:5000/api/v1.0/task

• destroy what you've built

terraform destroy
# yes | if you want to proceed