Fission

Serverless Functions for Kubernetes

What is Fission?

fission.io @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.

Usage

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

# A javascript function that prints "hello world"
$ curl -LO https://raw.githubusercontent.com/fission/examples/master/nodejs/hello.js

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

# Test your function.  This takes about 100msec the first time.
$ fission function test --name hello-js
Hello, world!
# Add the stock Python env to your Fission deployment
$ fission env create --name python --image fission/python-env

# A Python function that prints "hello world"
$ curl -LO https://raw.githubusercontent.com/fission/examples/master/python/hello.py

# Upload your function code to fission
$ fission function create --name hello-py --env python --code hello.py

# Test your function.  This takes about 100msec the first time.
$ fission function test --name hello-py
Hello, world!
# Add the stock Go env to your Fission deployment
$ fission env create --name go --image fission/go-env-1.16 --builder fission/go-builder-1.16

# A Go function that prints "hello world"
$ curl -LO https://raw.githubusercontent.com/fission/examples/master/go/hello.go

# Upload your function code to fission
$ fission function create --name hello-go --env go --src hello.go --entrypoint Handler

# Wait for your source code to be built, package status should be succeeded. This may take a few minutes.
$ fission pkg list | grep hello-go
hello-go-8bb933b5-b12b-499b-a951-ee2245c8f1b5 succeeded    go     23 Nov 21 10:55 IST

# Test your function. This takes about 100msec the first time.
$ fission function test --name hello-go
Hello, world!
# Add the stock Java env to your Fission deployment
$ fission environment create --name java --image fission/jvm-env --builder fission/jvm-builder --keeparchive --version 3

# A Java function that prints "hello world"
$ mkdir -p src/main/java/io/fission/
$ curl -L https://raw.githubusercontent.com/fission/examples/master/jvm/java/src/main/java/io/fission/HelloWorld.java \
  -o src/main/java/io/fission/HelloWorld.java
# pom.xml contains dependencies for the function.
$ curl -LO https://raw.githubusercontent.com/fission/environments/master/jvm/examples/java/pom.xml

# Upload your function code to fission via zip
$ zip java-src-pkg.zip -r src/ pom.xml
$ fission package create --name hello-pkg --env java --src java-src-pkg.zip
Package 'hello-pkg' created

# Wait for your source code to be built, package status should be succeeded. This may take a few minutes.
$ fission pkg list | grep hello-pkg
hello-pkg                                     succeeded    java   23 Nov 21 11:19 IST

# Test your function. This takes about 100msec the first time.
$ fission function create --name hello-java --env java --pkg hello-pkg --entrypoint io.fission.HelloWorld
$ fission function test --name hello-java
Hello World!

Join Us


Installing Fission

Installation guide for Fission installation

Concepts

Concepts of Fission architecture

Architecture

Fission architecture in detail

Usage

Fission usage

Contributing to Fission

Build deploy and contribute to Fission!

Troubleshooting

Troubleshoot guides

Release Highlights

Highlight for release

Fission CRD Reference

Fission Custom Resources Definition(CRD) Reference

Fission CLI Reference

Fission Command Line Reference

Last modified November 23, 2021: Changes for release 1.15 (#105) (ab55537)