satbackend

ConstD, the constellation manager

constd is an experiment built on two other experiments, so you should be doubly afraid of using it in production. That said, we'd love your feedback! 🙂

Sat is designed to be run in a constellation, with many instances collaborating to execute a higher-level application. Specifically, constellations can run Atmo projects, which are comprised of several functions that coordinate to create a server application. Since these projects are declarative, it is possible to distribute the app's compute and let the constellation 'figure it out'. That's the goal of constd.

As mentioned up top, constd is an experiment built on two other experiments:

• Sat, a small and fast WebAssembly server
• Atmo proxy mode, designed to mesh with a constellation

Build and run constd

You'll need Go and Docker to run Sat and ConstD, and you'll need to clone the Sat and Atmo repos.

To get started, build Atmo proxy. In the Atmo repo, run:

make docker/dev/proxy

This builds the suborbital/atmo-proxy:dev Docker image.

Next, in the Sat repo, build constd and start it:

make constd

.bin/constd {absolute/path/to}/atmo/example-project/modules.wasm.zip

constd will launch atmo-proxy and a constellation of Sat instances. Make a request to test it:

curl localhost:8080/hello -d 'my friend'

The atmo-proxy container receives the request, and proxies execution of the WebAssembly functions to the Sat constellation.

Currently, the following features normally found in an Atmo project won't work very well:

• Access to cache
• Authentication for HTTP/GraphQL requests
• Access to static files

But these will come in time!