The Complete Guide to Deploying Rails 8 with Kamal on Hetzner

I wrote the end-to-end deployment guide I wish existed when I first set up Rails 8 with Kamal. Most tutorials cover bits and pieces - here's one that covers everything from a bare server to production. What it covers Ordering and provisioning a Hetzner dedicated server Ansible provisioning with kamal-ansible-manager The production Dockerfile (jemalloc, Thruster, multi-stage build) Kamal deploy.yml — every section explained The full Solid stack: Solid Queue, Solid Cache, Solid Cable with 4 separate SQLite databases ActiveStorage in proxy mode for Cloudflare caching First deploy with kamal setup Cloudflare DNS, SSL (Full mode), and CDN caching Hetzner Storage Box for off-server backups via Samba/CIFS Netdata for server monitoring Litestream for continuous SQLite replication docker-volume-backup for daily storage snapshots The stack No Postgres. No Redis. No PaaS. Everything runs on a single server for ~36 EUR/month. Client → Cloudflare → kamal-proxy → Thruster → Puma → Rails 8 Read the f