50 Kubernetes Concepts Every Devops Engineer Should Know Free Pdf

An identity for a Pod (not a human). Allows the pod to authenticate with the API server to get info or modify resources.

The successor to Ingress. More role-oriented (infra vs app devs) and supports L4/L7 routing, cross-namespace references, and protocol flexibility.

Before you manage a fleet, you must understand the units. An identity for a Pod (not a human)

If you understand these 50 concepts, you can confidently: ✅ Discuss cluster capacity planning (Nodes vs. Pods vs. IP availability). ✅ Debug network policies blocking a frontend from talking to a backend. ✅ Design a GitOps strategy using ArgoCD (bonus concept #51). ✅ Implement a disaster recovery plan by backing up etcd. ✅ Pass the CKA (Certified Kubernetes Administrator) exam.

Do not wait until the morning of the outage to realize you don't have a reference guide. Container Network Interface

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Container Network Interface. A plugin that implements the fundamental K8s rule: Every pod gets its own unique IP address, and all pods can communicate with all other pods without NAT.