teomihuc / terraform-aws-vm-fleet

Terraform code for AWS instance spin up

• this repo holds the code to create a full infrastructure in AWS to deploy a configurable amount of VMs
• a monitoring solution is implemented after the VMs are up. Each VM will ping in a round-robbin manner other VM

General overview

This repository is divided in terraform modules:

1. Module: network -> creates the VPC and the subnet in which the VMs will be created (+ internet gw)
2. Module: vmfleet -> creates a bastion vm with public IP and generates a ssh key for it stored in AWS key pairs. Same thing done for each vm from the fleet, but the fleet vms are private
   • security groups were created, one for the bastion VM and one for the fleet
   • each ssk key for the vm fleet is saved on the bastion host in a specific location
   • at the end, a nul_resource is used in order to simulate a roundrobbin fashion of pinging the VMs in the fleet
   • the local script.sh file contains the script for round-robbin ping fashion

Variables

Notable variables:

• the VM type and VM ami are configurable from the .tfvars file (for both bastion and fleet vm)
• the number of the VM fleet is configured in tfvars and has a validation rule on it -> this can take values between 2 and 100