Why Kubernetes?

Lesson 01 12 minBeginner

Core concepts

Understand the problems Kubernetes solves and build a useful mental model before touching YAML.

Key idea

Kubernetes is a reconciliation system.

You declare the result you want; controllers continually work to make the real cluster match it.

Interactive command lab

Simulation only — no real cluster changes

Original syntax

kubectl version [flags]

Scope flagChange to an empty value to ask both client and cluster, or keep --client for local kubectl only.

$ kubectl version --client

Execution path

Read from top to bottom. Every arrow explains the action and destination.

Outside the cluster · your computer

kubectl

Builds the API request from the command you entered

NO CLUSTER CONTACT YET

This first lesson runs locally. The cluster will appear when Lesson 02 introduces it.

Ready for the guided tour

The tour opens as a fixed panel, so the diagram remains fully visible.

Quick knowledge check

Get both correct to pass

01What does Kubernetes continuously try to do?

Replace every container hourlyMatch actual state to desired stateRemove all worker nodes

02What does kubectl version --client inspect?

Only the local kubectl clientEvery Pod in the clusterThe scheduler logs

Choose one answer for each question

Feedback appears after you check your answers.

Lesson 1 of 8

Learn by building the cluster.