Fly Edge Runtime

A multi-tenant, v8 based runtime for building Edge Apps

This is the next generation version of fly, and replaces the Node / isolated-vm portions of the runtime with a native Rust + v8 binary. It's much faster. And much more concurrent. Plus it's Rust so it's more fun.

Installation

• wget -qO- https://github.com/superfly/libv8/releases/download/7.1.321/v8-osx-x64.tar.gz | tar xvz -C libfly
• git submodule update --init
• cd third_party/flatbuffers
  • cmake -G "Unix Makefiles"
  • make flatc
  • ensure ./third_party/flatbuffers is in $PATH
  • cd ../../
• cd v8env
  • yarn install
  • rollup -c
  • cd ..
• cargo run --bin server

Running v8env tests

cargo run --bin test "v8env/tests/**/*.spec.js"

Fly & Deno

The Fly runtime was originally derived from deno and shares some of the same message passing semantics. It has diverged quite a bit, but when possible we'll be contributing code back to deno.

TODO

• Send print (all console.x calls) back into Rust to handle in various ways
  • Send errors to stderr
  • Use envlogger (debug!, info!, etc. macros) for messages
  • Allow sending to graylog or something external
• Feature-parity
  • Image API
  • Cache
    • Expire (set ttl)
    • TTL (get ttl)
    • Tags / purge
    • global.purgeTag / del
  • Testing
• Runtime
  • Lifecycle management
    • Gracefully "replace" if running out of heap
  • Handle promise rejection (trash the runtime? just log?)
  • Handle uncaught error
• Builder
  • TypeScript support
  • HTTP imports!
• CI builds + releases
  • Mac
  • Linux
  • Windows
• HTTP
  • Actually use the config hostnames and correct app
  • Spawn multiple runtime instances for the same app (n cpus? configurable?)
  • Add Server header for Fly and current version (maybe?)
  • Fetch request bodies
• Observability
  • Exception reporting (via Sentry probably)
  • Metrics (prometheus)
• Stability / Resilience
  • do not use unwrap (that will panic and exit the process). Solution is to handle them and return or print proper errors
  • Get rid of all warnings
  • Tests!