Developer Builds Vault-Secured Ansible Automation on AWS EC2, Documents Real-World Pitfalls

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A developer spent a single day learning and implementing a fully functional Ansible setup on real AWS EC2 instances, complete with Vault-secured secrets and dynamic inventory. The project automates Nginx deployment across multiple EC2 servers without requiring manual access to each machine. Along the way, the developer encountered practical infrastructure challenges, including EC2 public IPs changing on every stop/start cycle. These issues, absent from most tutorials, were highlighted as the true learning moments of working with real cloud infrastructure. The full code and documentation have been published on GitHub for others to reference.

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