June 2021
Intermediate to advanced
335 pages
5h 50m
Chinese
Content preview from Kubernetes编程
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36
｜
第
2
章
GVK
和
GVR
是相关的。某个
GVR
定义的
HTTP
路径下会提供对相关
GVK
的服务。对
GVK
和
GVR
建立映射关系的过程叫作
REST
映射。在“
3.5.3
REST
映射”中，我们会看到在
Golang
中实现
REST
映射的
RESTMapper
类。
从全局的视角来看，
API
资源空间逻辑上是一个树状结构，它的顶层节点是
/api
和
/apis
，还有一些特殊的没有层级结构的端点比如
/healthz
或
/metrics
。
图
2-4
展示了这个
API
空间。注意，实际的结构和路径取决于
Kubernetes
的
版本，在过去的几年中，它们已经逐渐稳定。
图
2
-
4
：Kubernetes API 空间示例
2.1.3 Kubernetes API
版本
为了提高可扩展性，
Kubernetes
支持在不同的
API
路径下提供不同版本的
API
，比如
/api/v1
或
/apis/extensions/v1beta1
。不同的
API
版本意味着不同的
稳定性和支持力度。
• Alpha
级（比如
v1alpha1
）通常默认是被禁用的。这个级别中的功能可能
会随时不经通知就舍弃，所以只适合在一些短期的测试集群中使用。
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