Kamal Handbook

At the beginning of the book, it reviews what Kamal is, how it works on a basic level, and also conducts the first deployment. Then it goes into detail about the configuration of the Kamal server, after which readers will be able to apply their acquired knowledge for deploying two more complex examples. The final part of the book examines logging, debugging, CI/CD, and working with backups.

Preface

The preface to the first edition was written by Donal MacBreen, a leading programmer at 37signals and one of the main developers of Kamal.

Which edition to choose?

• The second edition of the book covers the Kamal 2.x releases, including the latest version Kamal 2.0.
• The previous edition of the book was dedicated to Kamal 1.x.

Is this book only suitable for Rails?

No. Kamal is not tied to any framework, so the book is written in a general manner, with minimal assumptions about the structure of a Dockerfile. You will need a Dockerfile, and you are ready to start.

Is Kamal only suitable for Ubuntu?

No. Kamal is not tied to a specific Linux distribution, so you can use any that is convenient for you. However, small server configuration examples in the book were tested on Ubuntu 22 LTS.