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Terraform best practice

This repository contains overview of Terraform IaaC tool and sample designs for a couple of use cases demonstrating how to apply TF to solve DevOps problems

Prerequisites

Creating non-root IAM user for tests

(follow the instructions here )

  1. Create a user tf-admin with AdministratorAccess policy
  2. Install awscli: https://aws.amazon.com/cli, normally the procedure looks like this and installs all binary in /usr/local/bin/aws:
curl "https://awscli.amazonaws.com/awscli-exe-linux-x86_64.zip" -o "awscliv2.zip"
unzip awscliv2.zip
sudo ./aws/install [--update]
aws --version
aws-cli/2.15.15 Python/3.11.6 Linux/5.15.0-92-generic exe/x86_64.ubuntu.20 prompt/off

Under the Security Credentials tab, one can then create access keys to authenticate against AWS service APIs - either set these directly as environment variables AWS_ACCESS_KEY_ID and AWS_SECRET_ACCESS_KEY or use proxy via awscli (aws console app keeps access codes in property file $HOME/.aws/credentials)

One can add new creds via command:

aws configure --profile tf-admin

Things to remember:

  • the ARN of owner (TF user) in the form arn:aws:iam::<project_id>:user/tf-admin, where project_is is a 12-digit number
  • Console sign-in URL (usually have the form https://<project_id>.signin.aws.amazon.com/console)
  • password for console to log in
  • access keys - they must be kept secure

Projects

minimal-project - creates a small VPC with 1 t2.micro instance accessible via SSH - can be handy in case a VM machine is needed to quickly perform some compute-intense experiments (VM can have TBs of memory). More details here

ci-pipeline - shows how to define in code AWS-cloud native pipeline which in its turn can use Terraform to deploy infrastructure (cascading IaaC). More details here

multi-tier-webapp - 3-tier project in React + Go - TBA

Terraform notes

General notes, philosophy and misc topics can be found here