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O'Reilly Platform
book
Kubernetes即学即用(第二版)
by
Brendan Burns
,
Joe Beda
,
Kelsey Hightower
June 2021
Intermediate to advanced
300 pages
5h 4m
Chinese
China Electric Power Press Ltd.
Content preview from
Kubernetes即学即用(第二版)
193
第
14
章
基于角色的访问控制
到目前为止,几乎你遇到的每个
Kubernetes
集群都启用了基于角色的访问控
制(
Role-Based Access Control
,
RBAC
)。因此,可能你以前也多少接触过
RBAC
。也许,刚开始的时候你无法使用集群,直到后来你使用了一些神奇
的咒语,添加了一个
RoleBinding
将用户映射到角色。然而,即使你接触过
RBAC
,可能也不太了解
Kubernetes
中的
RBAC
、它的用途以及如何成功地
使用它。而本章的主题就是
RBAC
。
Kubernetes
于版本
1.5
引入了
RBAC
,并在
Kubernetes 1.8
中正式启用。基于
角色的访问控制提供了一种机制,可以限制对
Kubernetes API
的访问和动作,
确保只有适当的用户才能访问集群中的
API
。
RBAC
是一个关键组件,既可
以加强部署了应用程序的
Kubernetes
集群的访问,又可以(也是更为重要)
防止意外事故,比如防止在摧毁测试集群时,由于位于错误的命名空间而意
外地干掉生产集群。
在
Kubernetes
中,多租户的安全性是一个既复杂又涉及很多方面的主题,值
得单独讨论。尽管
RBAC
在限制对
Kubernetes API
的访问方面非常有效,
但重要的是要记住,任何可以在
Kubernetes
集群内运行任意代码的人都可以
获得整个集群的
root
特权。你可能通过一些手段提高这类攻击的难度和开销,
而正确的
RBAC
设置是这类防御措施的一部分。但是,如果不得不考虑恶意
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Publisher Resources
ISBN: 9787519856762