50 Kubernetes Concepts Every Devops Engineer Should Know Free Pdf [work] Jun 2026

The fundamental building blocks of Kubernetes and how workloads are controlled.

The mechanism used to filter and select objects based on their labels. Part 3: Networking and Services How Pods talk to each other and the outside world.

The infrastructure expander. Automatically adjusts the size of the Kubernetes cluster by adding or removing underlying Nodes based on pending Pod requirements. 38. ResourceQuotas

A daemon that runs core control loops. It regulates the state of the cluster by watching the shared state through the apiserver.

Concepts like the Container Network Interface (CNI) and service types (ClusterIP, NodePort, LoadBalancer). 2. Application Strategy and Workloads (Concepts 21–35) Download a free PDF copy of this book - Packt Subscription The fundamental building blocks of Kubernetes and how

How containers talk to each other, to the cluster, and to the outside world.

To save you hours of scattered Googling, I’ve compiled a definitive list of that every practicing DevOps engineer should know—and packaged them into a free, downloadable PDF .

A daemon that embeds the core control loops (e.g., Node Controller, Job Controller) shipped with Kubernetes.

A network proxy that runs on each node in your cluster, maintaining network rules that allow network communication to your Pods from inside or outside the cluster. The infrastructure expander

: Various aspects of securing a Kubernetes cluster, including network policies, secrets, and role-based access control.

The ephemeral pocket. A directory accessible to the containers in a Pod, persisting data for the lifetime of that specific Pod. 29. PersistentVolume (PV)

Ensuring your platform can heal itself, handle traffic spikes, and remain fully transparent.

: Runs a copy of a Pod on every (or selected) node—common for logging or monitoring agents. : Runs a task to completion (e.g., a database migration). : Runs Jobs on a recurring schedule. Static Pods ResourceQuotas A daemon that runs core control loops

You cannot memorize 50 complex interactions overnight. When you are debugging a crash-loop backoff at 2 AM, you do not want to scroll through ads or vague documentation. You need a cheat sheet that tells you:

Controllers manage Pod lifecycles, scalability, and high availability.

While the 50 concepts outlined above provide a stellar baseline, Kubernetes is an ecosystem that evolves rapidly. To maintain a truly production-grade environment, many DevOps engineers also expand their scope to include continuous integration and continuous deployment (CI/CD) pipelines, Infrastructure as Code (IaC) tools like Terraform, and service meshes (such as Istio or Linkerd) designed to manage microservice communication.

: A syntax for filtering and extracting data from JSON objects.

Indicates whether a container is running. If it fails, the kubelet kills the container, and it undergoes its restart policy.