---
title: "Rails Containerization Best Practices"
url: https://daily.dev/posts/rails-containerization-best-practices-0vhudcly1
source_url: https://blog.saeloun.com/2026/05/04/rails-containerization-best-practices
type: article
source: "Saeloun"
published: 2026-05-04T17:32:26.589Z
updated: 2026-05-04T17:33:00.989Z
tags: ["docker", "containers", "rails", "kamal"]
reading_time: 4
upvotes: 0
comments: 0
language: en
---

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# Rails Containerization Best Practices

**[Saeloun](https://daily.dev/sources/saeloun)** · 4 min read · 0 upvotes · 0 comments

## Summary

A practical guide to containerizing Rails 8.1 applications using Docker and Kamal 2. Covers multistage builds to reduce image size by 50-70%, running containers as nonroot users, scanning for CVEs with Docker Scout in CI, configuring Puma for containerized environments, zero-downtime deployments with health checks, database migration hooks, horizontal/vertical scaling strategies, and a pre-merge checklist to enforce security and correctness standards.

## Full article

daily.dev links to this article rather than hosting it. Read it at the original source: <https://blog.saeloun.com/2026/05/04/rails-containerization-best-practices>

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---

Tags: [#docker](https://daily.dev/tags/docker), [#containers](https://daily.dev/tags/containers), [#rails](https://daily.dev/tags/rails), [#kamal](https://daily.dev/tags/kamal)

[View this post on daily.dev](https://daily.dev/posts/rails-containerization-best-practices-0vhudcly1)