Infrastructure Automation...

Why these tools exist — and what breaks without them

Why each tool
Terraform

Define servers as code

Write a .tf file, run apply — server exists. Run destroy — it's gone. Every environment is reproducible, version-controlled, and never relies on memory.

Without it: clicking dashboards by hand, drifting configs, no audit trail, can't rebuild reliably.
Ansible

Configure without touching the server

Connects over SSH and runs a playbook — installs packages, writes configs, starts services. Idempotent: run it once or a hundred times, outcome is always the same.

Without it: SSH in manually every time, miss a step, can't reproduce the exact setup later.
Nginx

The thing that actually serves traffic

Handles HTTP requests, serves static files, or proxies to an app. Ansible installs and configures it — you just define what to serve and where.

Without it: the server exists but nothing is reachable. Nginx is what makes it a web server.
GitHub Actions

Remove every manual step

A workflow file in your repo that runs Terraform + Ansible on every push. The entire infra lifecycle — provision, configure, deploy — happens automatically.

Without it: automation exists but you still trigger it by hand. CI/CD closes the loop.
Architecture
git push your local machine GitHub Actions CI/CD — runs on every push Terraform Provision Droplet Ansible Configure + install Nginx DigitalOcean Droplet Ubuntu · Nginx · blr1 · live
What happens on every push
  1. 1.git push — code lands on GitHub
  2. 2.GitHub Actions triggers the workflow automatically
  3. 3.Terraform provisions the Droplet, outputs its IP
  4. 4.Ansible SSHes into that IP, installs Nginx, applies config
  5. 5.Server is live — zero manual steps