ama VS kamal

If you want to stick on one machine, you can always just use a single node Docker Swarm to get the fully automated zero downtime deploys you want with Docker Compose:

https://github.com/BretFisher/ama/discussions/146

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This Awesome List is maintained by Bret Fisher (and coming soon, maintainers #3). This is a curated list of working tools and resources for using Swarm. It is not an official list, but a community effort to help people find the best tools and resources for Swarm in 2023 and beyond.

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Composer is not meant to run in production. It is only meant for development or building images. Make sure to read Getting started with swarm mode and check this if you want to use run your build image on a proper environment. (recommended)

I don't know if I would call myself an expert, but worrying about security is a big concern of mine and my job. While there are some security benefits to running your app in a container, you're correct in thinking there are some things to keep in mind while writing your Dockerfiles and using Docker. Check out Bret Fisher's write up on security concerns using Docker. This is the second time that I've mentioned him. He's a Docker Captain and recognized by Docker as an expert. His advice is sound.

Only one host for production environment. What to use: docker-compose or single node swarm? · Issue #8 · BretFisher/ama (github.com)

Guessing you're talking about https://kamal-deploy.org/ which looks interesting, though I tend to like reconciliation logic based systems ... but often only fired off imperatively with a plan/apply separation. So I shall be having a poke around anyway :)

Navigating the deployment landscape can be a daunting task for any developer, particularly those going it alone. PopaDex uses Kamal as its deployment solution, due to its straightforward and efficient nature. This tool is designed to facilitate the quick deployment of Rails applications across diverse environments, streamlining what can often be a complicated process. Kamal's appeal lies in its ability to demystify deployment, removing the hurdles commonly associated with Docker and app deployment in general. A couple of the main benefits of Kamal:

Or you can use [https://kamal-deploy.org/] and GitHub actions for automating at least deploys, but there are still will be issues that you will need to solve.

For homelab, Docker compose should be enough

For something more production oriented https://github.com/basecamp/kamal

Kamal is a wonderfully simple way to deploy your applications anywhere. It will also be included by default in Rails 8. Kamal is trivial, but I don’t recommend using it on your development machine.