Kubernetes basics

Kubernetes basics training

In this training we go through the fundamentals of Kubernetes technology. Each topic area includes a theory part, after which the concepts are practiced hands-on.

Schedule:

Time	Theme & theory	Hands-on exercise
09:00–09:30	How does Kubernetes work? Why orchestration is needed, the declarative model and the application lifecycle.	Testing the `kubectl` connection to a local cluster (k3d/minikube) and `kubectl cluster-info`.
09:30–10:30	Kubernetes components, the Control Plane (API Server, etcd, Scheduler, Controller Manager) and Worker nodes (Kubelet, Kube-proxy, Container Runtime).	Inspecting nodes and system pods (`kubectl get nodes`, `kubectl get pods -n kube-system`).
10:30–10:45	Coffee break	—
10:45–11:45	Managing Kubernetes (imperative vs. declarative), Pods, Deployments, ReplicaSets and the structure of YAML manifests.	Running the first application imperatively and converting it into a declarative YAML file (`kubectl apply`).
11:45–12:45	Lunch break	—
12:45–13:45	Networking and add-ons: Service types (ClusterIP, NodePort, LoadBalancer), CoreDNS, CNI network add-ons and Ingress controllers.	Exposing the application to the outside world with a Service and Ingress. Testing CoreDNS name resolution from inside a pod.
13:45–14:30	Configuration and state management: ConfigMaps, Secrets and an overview of storage (PV, PVC, StorageClass).	Wiring environment variables and secrets into a running pod for later use.
14:30–14:45	Coffee break	—
14:45–15:45	Higher-level management and everyday tools: Helm package management, Kustomize, pod logging (`kubectl logs`) and debugging (`kubectl exec`, `kubectl describe`).	Installing a ready-made application (e.g. Nginx/Metrics Server) with a Helm chart and overriding your own values.
15:45–16:30	Summary, best practices and Q&A: security (RBAC basics), resource limits (requests/limits) and discussion.	Cleaning up resources (`kubectl delete`) and an open Q&A session.