June 2021
Intermediate to advanced
335 pages
5h 50m
Chinese
Content preview from Kubernetes编程
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12
｜
第
1
章
•
通过
Webhook
实现身份认证。
本书主要关注自定义资源、控制器、
Webhook
和自定义
API
服务器，以及
Kubernetes
的扩展模式。如果你对其他扩展点感兴趣，比如存储或网络插件，
请参考官方文档。
现在你已经理解了
Kubernetes
的扩展模式的基本概念以及本书所要涉及的范
围，下面我们就可以开始讨论
Kubernetes
控制平面的核心以及对其进行扩展
的方法。
1.4
控制器和
Operator
在本节中，我们将学习
Kubernetes
中的控制器和
Operator
，了解它们的工作
原理。
在
Kubernetes
的术语中，控制器实现了一个控制循环，它通过
API
服务器观
测集群中的共享状态，进行必要的变更，尝试把当前状态转换到期望的目标
状态。
在开始介绍控制器的内部机制前，先定义一下我们将使用的术语：
•
控制器可以对
Kubernetes
的核心资源（比如
Deployment
或
Service
）进行
操作，通常是控制平面中
Kubernetes
控制器管理器的一部分，它们也可以
观察并操作用户自定义的资源。
• Operator
也是一种控制器，但它会包含一些运维逻辑，比如应用程序的生
命周期管理，同时也会用第
4
章中将要介绍的自定义资源。
由于
Operator
的概念是基于控制器的，所以我们先来看看控制器，然后再介
绍
Operator
这种特殊的情况。
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.