webserver-cluster

Terraform Web Server Cluster module example

This folder contains a Web Server Cluster module example of a Terraform file Terraform.

This Terraform file define a cluster of web servers module on AWS (Amazon Web Services) using EC2 and Auto Scaling, and a load balancer using ELB.

The cluster of web servers returns "Hello, World" for the URL /. The load balancer listens on port 80.

Requirements

• You must have Terraform installed on your computer.
• You must have an AWS (Amazon Web Services) account.
• It uses the Terraform AWS Provider that interacts with the many resources supported by AWS through its APIs.
• This code was written for Terraform 0.10.x.

Using the code

Terraform modules are not meant to be deployed directly. Instead, you should be using them from other templates. See live/stage/services/webserver-cluster and live/prod/services/webserver-cluster for examples.

• Input variables than manage AMI and text the User Data script return.

  There are two input variables defined in vars.tf file in this Module in order to manage AMI and text the User Data script return:

  variable "ami" {
    description = "The AMI to run in the cluster"
    default     =  "ami-785db401"
  }
  
  variable "server_text" {
    description = "The text the web server should return"
    default     = "Hello, World"
  }

  These are used by the templates in live/stage/services/webserver-cluster and live/prod/services/webserver-cluster.