Book Image

Learn Kubernetes Security

By : Kaizhe Huang, Pranjal Jumde
5 (2)
Book Image

Learn Kubernetes Security

5 (2)
By: Kaizhe Huang, Pranjal Jumde

Overview of this book

Kubernetes is an open source orchestration platform for managing containerized applications. Despite widespread adoption of the technology, DevOps engineers might be unaware of the pitfalls of containerized environments. With this comprehensive book, you'll learn how to use the different security integrations available on the Kubernetes platform to safeguard your deployments in a variety of scenarios. Learn Kubernetes Security starts by taking you through the Kubernetes architecture and the networking model. You'll then learn about the Kubernetes threat model and get to grips with securing clusters. Throughout the book, you'll cover various security aspects such as authentication, authorization, image scanning, and resource monitoring. As you advance, you'll learn about securing cluster components (the kube-apiserver, CoreDNS, and kubelet) and pods (hardening image, security context, and PodSecurityPolicy). With the help of hands-on examples, you'll also learn how to use open source tools such as Anchore, Prometheus, OPA, and Falco to protect your deployments. By the end of this Kubernetes book, you'll have gained a solid understanding of container security and be able to protect your clusters from cyberattacks and mitigate cybersecurity threats.
Table of Contents (19 chapters)
1
Section 1: Introduction to Kubernetes
7
Section 2: Securing Kubernetes Deployments and Clusters
14
Section 3: Learning from Mistakes and Pitfalls

Enabling high availability in a Kubernetes cluster

Availability refers to the ability of the user to access the service or system. The high availability of a system ensures an agreed level of uptime of the system. For example, if there is only one instance to serve the service and the instance is down, users can no longer access the service. A service with high availability is served by multiple instances. When one instance is down, the standby instance or backup instance can still provide the service. The following diagram describes services with and without high availability:

Figure 11.1 – Services with and without high availability

In a Kubernetes cluster, there will usually be more than one worker node. The high availability of the cluster is guaranteed as even if one worker node is down, there are some other worker nodes to host the workload. However, high availability is more than running multiple nodes in the cluster. In this section, we will...