3.3.6. Operator¶

github: https://github.com/operator-framework/operator-sdk

2016年，CoreOS在Kubernetes中引入了Operator这一概念。CoreOS首席技术官布兰登-飞利浦(Brandon Philips)在其开创性blog`Introducing Operators: Putting Operational Knowledge into Software

<https://coreos.com/blog/introducing-operators.html>`_ 中将Operator定义为:

A Site Reliability Engineer (SRE) is a person [who] operates an application by writing software.
They are an engineer, a developer, who knows how to develop software specifically
    for a particular application domain.
The resulting piece of software has an application’s operational domain knowledge programmed into it.
[...]
We call this new class of software Operators.
An Operator is an application-specific controller that extends the Kubernetes API
    to create, configure, and manage instances of complex stateful applications
    on behalf of a Kubernetes user.
It builds upon the basic Kubernetes resource and controller concepts
    but includes domain or application-specific knowledge to automate common tasks.