Fly.io Deployment & Management Core Concepts - Fly App : Named group of Machines (VMs) + config + networking + secrets belonging to one org - Fly Machine : Fast-launching VM (sub-second start). Ephemeral root filesystem. Lifecycle: created - started - stopped - destroyed - Fly Volume : NVMe-backed persistent storage, 1:1 with a Machine, region-pinned, encrypted at rest by default - Fly Proxy : Edge proxy handling TLS termination, load balancing, autostop/autostart, HTTP routing - flyctl (fly) : CLI for all Fly.io operations. Install: or - fly.toml : App configuration file. See references/fly-…