The container native, cloud agnostic serverless platform.
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.gitignore Use alpine images to make tests take less time (#629) Jan 2, 2018 date change Jan 17, 2018 Governance rules for Fn Project (#1094) Jul 26, 2018 fn: update fn dependencies for go 1.10 (#856) Mar 14, 2018
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docker-compose.yml Upgrade compose version from 3 to 3.5 (#1148) Jul 31, 2018 fn: go-fmt needs to be more informative (#808) Mar 2, 2018 fn: remove confusing parallelism in test scripts (#1079) Jun 20, 2018 license printing script works again (#676) Jan 11, 2018 fn: runner status and docker load images (#1116) Jul 12, 2018 fn: api-tests are decommissioned: cleanup Makefile (#1082) Jun 21, 2018 Remove V1 endpoints and Routes (#1210) Sep 17, 2018

Fn Project

Quickstart  |  Tutorials  |  Docs  |  API  |  Operating  |  Flow  |  UI

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Fn is an event-driven, open source, Functions-as-a-Service (FaaS) compute platform that you can run anywhere. Some of its key features:

  • Open Source
  • Native Docker: use any Docker container as your Function
  • Supports all languages
  • Run anywhere
    • Public, private and hybrid cloud
    • Import Lambda functions and run them anywhere
  • Easy to use for developers
  • Easy to manage for operators
  • Written in Go
  • Simple yet powerful extensibility

The fastest way to experience Fn is to follow the quickstart below, or you can jump right to our full documentation, API Docs, or hit us up in our Slack Community!



  • Docker 17.10.0-ce or later installed and running
  • A Docker Hub account (Docker Hub) (or other Docker-compliant registry)
  • Log Docker into your Docker Hub account: docker login

Install CLI tool

The command line tool isn't required, but it sure makes things a lot easier. There are a few options to install it:

1. Homebrew - macOS

If you're on a Mac and use Homebrew, this one is for you:

brew install fn

2. Shell script - Linux and macOS

This one works on Linux and macOS (partially on Windows).

If you are running behind a proxy first set your http_proxy and https_proxy environmental variables:

curl -LSs | sh

This will download a shell script and execute it. If the script asks for a password, that is because it invokes sudo.

3. Download the bin - Linux, macOS and Windows

Head over to our releases and download it.

Run Fn Server

Now fire up an Fn server:

fn start

This will start Fn in single server mode, using an embedded database and message queue. You can find all the configuration options here. If you are on Windows, check here. If you are on a Linux system where the SELinux security policy is set to "Enforcing", such as Oracle Linux 7, check here.

Your First Function

Functions are small but powerful blocks of code that generally do one simple thing. Forget about monoliths when using functions, just focus on the task that you want the function to perform. Our CLI tool will help you get started super quickly.

Create hello world function:

fn init --runtime go hello

This will create a simple function in the directory hello, so let's cd into it:

cd hello

Feel free to check out the files it created or just keep going and look at it later.

# Deploy your functions to your local Fn server
fn deploy --app myapp --local

Now you can call your function:

fn invoke myapp hello

That's it! You just deployed your first function and called it. Try updating the function code in func.go then deploy it again to see the change.

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