June 2022
Intermediate to advanced
201 pages
4h 42m
English
Content preview from Certified Kubernetes Administrator (CKA) Study Guide
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Chapter 2. Cluster Architecture, Installation, and Configuration
According to the name of the chapter, the first section of the curriculum refers to typical tasks you’d expect of a Kubernetes administrator. Those tasks include understanding the architectural components of a Kubernetes cluster, setting up a cluster from scratch, and maintaining a cluster going forward.
Interestingly, this section also covers the security aspects of a cluster, more specifically role-based access control (RBAC). You are expected to understand how to map permissions for operations to API resources for a set of users or processes.
At the end of this chapter, you will understand the tools and procedures for installing and maintaining a Kubernetes cluster. Moreover, you’ll know how to configure RBAC for representative, real-world use cases.
At a high level, this chapter covers the following concepts:
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Understanding RBAC
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Installing of a cluster with
kubeadm -
Upgrading a version of a Kubernetes cluster with
kubeadm -
Backing up and restoring etcd with
etcdctl -
Understanding a highly available Kubernetes cluster
Role-Based Access Control
In Kubernetes you need to be authenticated before you are allowed to make a request to an API resource. A cluster administrator usually has access to all resources and operations. The easiest way to operate a cluster is to provide everyone with an admin account. While “admin access for everyone” sounds fantastic as you grow your business, it comes with a considerable ...
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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.