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.
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.
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:
| Environment | Image |
|---|---|
| Binary (for executables or scripts) | fission/binary-env |
| Go | fission/go-env |
| JVM | fission/jvm-env |
| .NET | fission/dotnet-env |
| .NET 2.0 | fission/dotnet20-env |
| NodeJS (Alpine) | fission/node-env |
| NodeJS (Debian) | fission/node-env-debian |
| Perl | fission/perl-env |
| PHP 7 | fission/php-env |
| Python 3 | fission/python-env |
| Ruby | fission/ruby-env |
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.)
A trigger is something that maps an event to a function; Fission as of today supports HTTP request, timed, and message queue triggers.
# 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 https://raw.githubusercontent.com/fission/fission/master/examples/nodejs/hello.js > 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!See the examples directory for more.
See the installation guide.
See the compilation guide.
Fission is a project by Platform9 Systems and many contributors.