# FaaS（函数即服务）

FaaS（Functions as a Service）函数即服务，FaaS是无服务器计算的一种形式，当前使用最广泛的是AWS的Lambada。

现在当大家讨论Serverless的时候首先想到的就是FaaS，有点甚嚣尘上了。FaaS本质上是一种事件驱动的由消息触发的服务，FaaS供应商一般会集成各种同步和异步的事件源，通过订阅这些事件源，可以突发或者定期的触发函数运行。

当前开源的FaaS框架大部分都是基于Kuberentes来实现的，例如：

* [faas-netes](https://github.com/alexellis/faas-netes) - Enable Kubernetes as a backend for Functions as a Service (OpenFaaS) <https://github.com/alexellis/faas>
* [fn](https://github.com/fnproject/fn) - The container native, cloud agnostic serverless platform. [http://fnproject.io](http://fnproject.io/)
* [funktion](https://github.com/funktionio/funktion/) - a CLI tool for working with funktion <https://funktion.fabric8.io/>
* [fx](https://github.com/metrue/fx) - Poor man's serverless framework based on Docker, Function as a Service with painless.
* [IronFunctions](https://github.com/iron-io/functions) - IronFunctions - the serverless microservices platform. [http://iron.io](http://iron.io/)
* [kubeless](https://github.com/kubeless/kubeless) - Kubernetes Native Serverless Framework [http://kubeless.io](http://kubeless.io/)
* [nuclio](https://github.com/nuclio/nuclio) - High-Performance Serverless event and data processing platform
* [OpenFaaS](https://github.com/openfaas/faas) - OpenFaaS - Serverless Functions Made Simple for Docker & Kubernetes <https://blog.alexellis.io/introducing-functions-as-a-service/>
* [OpenWhisk](http://openwhisk.incubator.apache.org/) - Apache OpenWhisk (Incubating) is a serverless, open source cloud platform that executes functions in response to events at any scale.
* [Knative](https://knative.dev/) - Kubernetes-based platform to deploy and manage modern serverless workloads.

关于整个Cloud Native开源生态，请参考[awesome-cloud-native](https://jimmysong.io/awesome-cloud-native)。


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