kamal-backup: Scheduled Rails Backups for Kamal Apps

I released kamal-backup today. I run Chat with Work on Kamal, and I needed backups. There are already Kamal accessories for database backups. None of them also back up Active Storage. None use restic, so encryption, deduplication, and repository checks are on you. None ship a CLI with restores and drills. None produce evidence you can hand a security reviewer. So I built one. A gem and a Docker image kamal-backup is two pieces: a Ruby gem you add to your Rails app, and a Docker image you boot as a Kamal accessory. They point at a restic repository you bring yourself. The gem is your CLI. Local commands run directly on your machine using restic. Production-side commands shell out through Kamal into the accessory. The same kamal-backup binary covers setup (init, validate), on-demand operations (backup, list, check), data movement (restore local, restore production), verification (drill local, drill production), and audit (evidence). The Docker image (ghcr.io/crmne/kamal-backup) ships…