Docker Without Docker

Fly.io is a platform that takes container images and runs them on hardware around the world. It uses OCI images, which are simple stacks of tarballs representing layers in a Docker container. The company has built its own repository server to manage containers for different organizations and uses Firecracker as a VMM engine to run containers as VMs. Fly.io also offers an orchestration system that plugs into their API, allowing users to deploy applications globally on their Rust-powered anycast proxy network in under 10 minutes.