Platform-as-a-Service (PaaS) providers make launching a web application simple. You push code, and they handle the infrastructure. However, as your application grows, the cost scales aggressively. What starts as a $20/month hobby server can scale to hundreds or thousands of dollars for simple database upgrades, extra RAM, or custom background workers.
In the past, moving off a PaaS meant adopting complex container orchestrators like Kubernetes or spending hours writing custom server setup scripts.
Kamal 2 (created by 37signals) offers a middle ground. It is an infrastructure-agnostic deployment tool that allows you to deploy containerized applications to any virtual private server (like Hetzner, DigitalOcean, or bare metal) with zero downtime, using a clean SSH-based workflow.
Here is a practical engineering guide to deploying a production Laravel application using Kamal 2.
1. Prerequisites and Docker Setup
