Deploying web applications in hard. Learn what's new in Kamal 2 and how to use it to manage multiple apps on a single host.

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Kamal 2 simplifies deploying multiple containerized web applications to a single server through its integrated proxy. This guide demonstrates deploying two Rails apps to a DigitalOcean droplet, covering server setup, Docker registry configuration, DNS setup, and the deployment process. Key improvements in Kamal 2 include Kamal Proxy (replacing Traefik) for multi-app support, automatic HTTPS via Let's Encrypt, canary deployments, maintenance mode, and enhanced secret management. Important considerations include proper port configuration, adequate server RAM to avoid deployment timeouts, and the need for production monitoring.

Deploying multiple apps with what's new in Kamal 2

Setting up Kamal on an app to deploy to Digital Ocean

Setting up Kamal for a second app on the same server