Fission: Serverless Functions for Kubernetes
Fission is a fast 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.
A function is a piece of code that follows the fission function interface.
An environment contains the language- and runtime-specific parts of running a function.
The following environments are currently available:
|Binary (for executables or scripts)||
You can also extend environments or create entirely new ones if you want. (An environment is essentially just a container with a webserver and dynamic loader.)
See the examples directory for more.
Running Fission on your Cluster
See the installation guide.
See the compilation guide.
Fission is in early alpha. It's not suitable for production use just yet.