fx

Poor man's function as a service.

Introduction

fx is a tool to help you do Function as a Service on your own server. fx can make your stateless function a service in seconds. The most exciting thing is that you can write your functions with most programming languages.

Language	Status	Contributor
Go	Supported	fx
Node	Supported	fx
Python	Supported	fx
Ruby	Supported	fx
PHP	Supported	@chlins
Julia	Supported	@mbesancon
Java	No
Scala	No
Perl	Working on
.Net	Working on
R	Working on
Rust	Working on

tweet @_metrue or issue is welcome.

Usage

Requirements

• Docker: make sure Docker installed and running on your server.
• dep: fx project uses dep to do the golang dependency management.

Build and Run

$ git clone https://github.com/metrue/fx.git
$ cd fx
$ dep ensure
$ go install ./

• start server

fx serve

now you can make a function to service in a second.

fx up ./examples/functions/func.js

the function defined in examples/functions/func.js is quite simple, it calculates the sum of two numbers then returns:

module.exports = (input) => {
    return parseInt(input.a, 10) + parseInt(input.b, 10)
}

then you can test your service:

curl -X POST <service url> -H "Content-Type: application/json" -d '{"a": 1, "b": 1}'

of course you can do more.

Usage:
$ fx serve                                      start f(x) server
$ fx up   func1.js func2.py func3.go ...        deploy a function or a group of functions
$ fx down [service ID] ...                      destroy a function or a group of functions
$ fx list                                       list deployed services
$ fx --version                                  show current version of f(x)

How to write your function

functions example with Go, Ruby, Python, Node, PHP.

• Go

package main

type Input struct {
	A int32
	B int32
}

type Output struct {
	Sum int32
}

func Fx(input *Input) (output *Output) {
	output = &Output{
		Sum: input.A + input.B,
	}
	return
}

• Ruby

def fx(input)
    return input['a'] + input['b']
end

• Python

def fx(input):
    return input['a'] + input['b']

• Node

module.exports = (input) => {
    return parseInt(input.a, 10) + parseInt(input.b, 10)
}

• PHP

<?php
    function Fx($input) {
        return $input["a"]+$input["b"];
    }

• Julia

struct Input
    a::Number
    b::Number
end

fx = function(input::Input)
    return input.a + input.b
end

Contributors

Thank you to all the people who already contributed to fx!

LICENSE

MIT