Serverless Functions for Kubernetes

What is Fission? @fissionio

Fission is a fast, open source serverless framework for Kubernetes with a focus on developer productivity and high performance.

Fission operates on just the code: Docker and Kubernetes are abstracted away under normal operation, though you can use both to extend Fission if you want to.

Fission is extensible to any language; the core is written in Go, and language-specific parts are isolated in something called environments (more below). Fission currently supports NodeJS, Python, Ruby, Go, PHP, Bash, and any Linux executable, with more languages coming soon.

Performance: 100msec cold start

Fission maintains a pool of “warm” containers that each contain a small dynamic loader. When a function is first called, i.e. “cold-started”, a running container is chosen and the function is loaded. This pool is what makes Fission fast: cold-start latencies are typically about 100msec.

Kubernetes is the right place for Serverless

We’re built on Kubernetes because we think any non-trivial app will use a combination of serverless functions and more conventional microservices, and Kubernetes is a great framework to bring these together seamlessly.

Building on Kubernetes also means that anything you do for operations on your Kubernetes cluster — such as monitoring or log aggregation — also helps with ops on your Fission deployment.

Fission Concepts

Visit concepts for more details.


# Add the stock NodeJS env to your Fission deployment
$ fission env create --name nodejs --image fission/node-env

# A javascript one-liner that prints "hello world"
$ curl > hello.js

# Upload your function code to fission
$ fission function create --name hello --env nodejs --code hello.js

# Map GET /hello to your new function
$ fission route create --method GET --url /hello --function hello

# Run the function.  This takes about 100msec the first time.
$ fission function test --name hello
Hello, world!

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Installing Fission

Installation guide for Fission installation


Concepts of Fission architecture


Fission architecture in detail


Fission usage

Contributing to Fission

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