fly-io
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:
brew install flyctlorcurl -L https://fly.io/install.sh | sh - fly.toml: App configuration file. See references/fly-toml-config.md for complete reference
Quick Start Workflow
# 1. Create app + fly.toml
fly launch
# 2. Set secrets
fly secrets set DATABASE_URL=postgres://... SECRET_KEY=...
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