June 2021
Intermediate to advanced
335 pages
5h 50m
Chinese
Content preview from Kubernetes编程
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自定义资源进阶
｜
277
9.1.3
实现转换
Webhook
了解了以上背景知识，我们可以开始实现
Webhook
项目了。你可以从代码仓
库下载源代码，包括：
•
一个以
HTTPS Web
服务器的形式实现的
Webhook
。
•
一组端点：
─
/convert/v1beta1/pizza
用于把
Pizza
对象在
v1alpha1
和
v1beta1
之间
进行转换。
─
/admit/v1beta1/pizza
用于为
spec.toppings
字段填充默认值
（
mozzarella
、
tomato
和
salami
）。
─
/validate/v1beta1/pizza
用于验证每种配料字段中所设置的配料，都存
在相应的配料对象。
后两个端点属于准入
Webhook
，将在“
9.2
准入
Webhook
”中详细介绍。这
个
Webhook
可执行文件中同时提供了准入和转换两组
Webhook
。
这几个端点路径中的
v1beta1
与我们的餐厅
API
组的
v1beta1
没有关系，但
是它与支持
Webhook
的
apiextensions.k8s.io API
组版本相关。如果哪天
这些
v1
版本的
Webhook API
成为了正式版本
注
1
，我们也需要添加相应的新
的
v1
端点，以便同时支持旧的（比如当前版本的）和新的
Kubernetes
集群。
可以在
CRD
清单文件中指定
Webhook
所支持的版本。
下面我们来学习转换
Webhook
的工作机制，然后我们会深入了解如何把
Webhook
部署到真实的集群中。请再次留意，转换
Webhook
在
1.14
版本中
仍然是
Alpha
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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.