Fly.io reference

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About Fly.io

• Architecture: A brief overview of how Firecracker VMs, Anycast networking, Fly Proxy, and the backhaul network come together to create Fly.io’s infrastructure.
• Regions: The regions around the world where we run servers so your apps can run close to your users.
• Machine migration: How Fly.io automatically migrates your app’s Machines from problematic hosts to healthy hosts.

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Reference docs

• flyctl: The flyctl CLI reference documentation.
• App Configuration (fly.toml): The settings for configuring your app in the fly.toml configuration file. The app configuration includes how the app is built, its volume mounts, network services, and more.
• Fly Launch: A deeper dive into how Fly Launch creates and configures new apps.
• Fly Proxy: Learn about how Fly Proxy routes requests, handles connections, and does load balancing.
• Fly Proxy autostop/autostart: Learn how Fly Proxy determines excess capacity for an app to shut down or suspend Machines when they’re not needed and start them back up when there’s traffic.
• Fly Proxy Content Encoding: Learn how our proxy handles HTTP response compression, so you get better performance out of the box.
• Machine Suspend/Resume: How to pause a Fly Machine in place and resume it in milliseconds.
• Health Checks: Learn how Fly monitors your apps health through HTTP, TCP, and custom checks to verify availability and trigger automatic restarts when needed.

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Working with Fly.io

• Autoscaling: Adjust the number of running or created Fly Machines dynamically.
• Builders: The different ways you can assemble applications into deployable images for Fly.io.
• Load Balancing: How Fly Proxy distributes traffic to your application instances based on load, closeness, and concurrency settings.
• Migrating from AWS to Fly.io overview: A guide with considerations for moving from AWS to Fly.io.
• Multiple processes inside a Fly.io app: The different ways to run multiple processes inside a Fly App.