Book Image

Learn Kubernetes Security

By : Kaizhe Huang, Pranjal Jumde
5 (1)
Book Image

Learn Kubernetes Security

5 (1)
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)
Section 1: Introduction to Kubernetes
Section 2: Securing Kubernetes Deployments and Clusters
Section 3: Learning from Mistakes and Pitfalls

Real-time monitoring and management in monolith environments

Resource management and monitoring are important in monolith environments as well. In monolith environments, infrastructure engineers often pipe the output of Linux tools such as top, ntop, and htop to data visualization tools in order to monitor the state of VMs. In managed environments, built-in tools such as Amazon CloudWatch and Azure Resource Manager help to monitor resource usage.

In addition to resource monitoring, infrastructure engineers proactively allocate minimum resource requirements and usage limits for processes and other entities. This ensures that sufficient resources are available to services. Furthermore, resource management ensures that misbehaving or malicious processes do not hog resources and prevent other processes from working. For monolith deployments, resources such as CPU, memory, and spawned processes are capped for different processes. On Linux, process limits can be capped using prlimit: