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
｜
121
4.4.3 Operator SDK
和
Kubebuilder
的
controller-runtime
客户端
为了保证全书内容完整，我们下面来快速了解一下
controller-runtime
这第
三种客户端，也就是
“
4.4
开发者眼中的自定义资源”中列出的第二个可选
项。在第
6
章中将要看到的
Operator SDK
和
Kubebuilder
都是以
controller-
runtime
项目为基础的。它提供了一个使用“
4.4.2.1
剖析类型”中所介绍的
Go
类型的客户端。
与上一节中所介绍的
client-gen
不同，这种客户端是单一实例，可以用于处
理任何在指定
Scheme
中注册的型别，这与“
4.4.1
动态客户端”中所介绍的
客户端类似。
它使用
API
服务器提供的服务发现信息来把不同的型别映射到不同的
HTTP
路径上。在第
6
章中，我们还会进一步了解这种客户端在两种不同的
Operator
实现方案中的使用细节。
下面是使用
controller-runtime
的一个简单示例：
import (
"flag"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes/scheme"
"k8s.io/client-go/tools/clientcmd"
runtimeclient "sigs.k8s.io/controller-runtime/pkg/client" ...
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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.