June 2021
Intermediate to advanced
335 pages
5h 50m
Chinese
Content preview from Kubernetes编程
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Kubernetes API
基础
｜
31
API
服务器提供的
API
包含以下的功能：
•
读取状态：获取单个对象、列出对象、获取变更消息。
•
操作状态：创建、更新或删除对象。
所有的状态都会被持久化在
etcd
中。
主控节点组件
控制器管理器 调度器
API服务器
工作节点 工作节点 工作节点 工作节点
原生
应用
图
2
-
1
：Kubernetes 架构概览
Kubernetes
的核心就是
API
服务器，它的工作原理是怎样的呢？我们先把
API
服务器看成是一个黑盒，仔细了解它的
HTTP
接口，然后再讨论它的内
部实现原理。
2.1.1 API
服务器的
HTTP
接口
从客户端的角度来看，
API
服务器提供了一个
RESTful HTTP API
，提供
JSON
或
Protocol Buffers
（缩写为
Protobuf
）格式的数据内容。出于性能考虑，
集群内的通信主要使用
Protobuf
。
API
服务器的
HTTP
接口负责处理
HTTP
请求，这些请求通过指定不同的
HTTP
动词（
HTTP Verb
，也叫
HTTP
方法）来对
Kubernetes
的资源进行不同
的操作：
32
｜
第
2
章
• HTTP GET
方法用于获取特定资源（比如一个
Pod
）的相关数据，或者列
出一组资源（比如，列出一个命名空间中的所有
Pod
）。
• HTTP POST
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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.