Kamal in the Real World: Lessons from Running Rails Apps on AWS

#aws #programming #ruby #rails

February 4, 2026

At Kaigi on Rails 2025 , one talk stood out for being refreshingly honest about infrastructure.

Not a tutorial. Not a product pitch. But a real report from production.

In Hall Blue , yappu presented:

“Kamalって便利？社内プロジェクト3つをKamal + AWSで運用した体験談” (Is Kamal useful? Operating three internal projects with Kamal + AWS)

What followed was exactly the kind of content the Rails ecosystem needs right now: clear explanations, real problems, and practical fixes.

This article summarizes and reflects on that talk, while keeping full credit to its original source.

👉 Read the full article.