/multinode-terraform-terragrunt

Repository for multi-node terraform code with terragrunt on AWS cloud

Primary LanguageHCLMIT LicenseMIT

multinode-terraform-terragrunt

Repository for multi-node terraform code with terragrunt on AWS cloud

Methodology

  • I am using terraform and terragrunt for expressing the infrastructure resources in AWS cloud.
  • terraform is used to express resources in the cloud using its aws provider whereas terragrunt is being used to keep the terraform code clean and dry of configuration.
  • I would be creating all resources, including VPC and subnets, routing and internet gateways, so that a dedicated, isolated environment can be established for the task.
  • terragrunt allows a single click deployment of all terraform code, using terragrunt run-all apply that can detect changes in the terragrunt configuration and apply the diff.
  • terragrunt allows code to be organised in a heirarchical manner so that resources can be organised.

Prerequisites

NOTE: These instructions are for Linux

  • aws: v2.0

    sudo apt install unzip
curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
unzip awscliv2.zip
sudo ./aws/install

  • terraform: v1.3.0

    sudo apt-get update && sudo apt-get install -y gnupg software-properties-common curl
curl -fsSL https://apt.releases.hashicorp.com/gpg | sudo apt-key add -
sudo apt-add-repository "deb [arch=amd64] https://apt.releases.hashicorp.com $(lsb_release -cs) main"
sudo apt-get update && sudo apt-get install terraform==1.3.0

  • terragrunt: v0.39.1

    TERRAGRUNT_VERSION=0.39.1
wget https://github.com/gruntwork-io/terragrunt/releases/download/v$TERRAGRUNT_VERSION/terragrunt_linux_amd64
chmod +x terragrunt_linux_amd64
mv terragrunt_linux_amd64 /usr/local/bin/terragrunt

Infrastructure deployment and testing

  • Please configure your aws credentials by running aws configure after installing the cli utility.
  • After that, please cd into the terragrunt/ folder, and execute, terragrunt run-all apply command. terragrunt with the help of terraform would detect that the configuration was never applied and would print out a plan of deployment. Please enter y followed by enter to proceed. It will take few minutes for the entire deployment to be complete.
  • EKS cluster will deployed. It will take a while to get done. Please pull the kubeconfig for the cluster using aws eks update-kubeconfig --region <REGION> --name <CLUSTER_NAME>. View and set your kubectl context for the cluster
kubectl config get-contexts
kubectl set-context <CONTEXT-NAME>