June 2021
Intermediate to advanced
335 pages
5h 50m
Chinese
Content preview from Kubernetes编程
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使用自定义资源
｜
123
假如你编写一个
Operator
，需要通过客户端来访问很多不同的型别。如果使
用“
4.4.2.3
通过
client-gen
生成强类型客户端”中介绍的方法生成的强类型客
户端，就需要给这个
Operator
传递很多种不同的客户端，这会让代码看上去
有些复杂。如果是使用
controller-runtime
的客户端，那对一个
Scheme
中
所有型别都只需要用一个客户端就够了。
三种客户端各自都有存在的价值，取决于打算在何种上下文中使用。对于
一些处理不确定对象的通用控制器，只能选用动态客户端。为了在控制器
里保证类型安全进而确保代码逻辑正确，可以选用强类型的客户端。对于
Kubernetes
项目自身，有很多开发者贡献代码，不管被多少人扩展功能或是
重写代码，代码的可靠性都非常重要。如果需要开发方便快捷并减少重复的
代码，
controller-runtime
客户端是一个不错的选择。
4.5
小结
在本章中，我们介绍了自定义资源，它是
Kubernetes
生态系统中最核心的扩
展机制。现在你已经很好地理解了这项功能及其局限性，并了解了现有的各
种客户端的知识。
下面，让我们来学习如何通过生成代码来管理这里所说的自定义资源。
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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.