Knaph

Cloud Native

Study it inIntroduction to Kubernetes — Part 1: Get Something Running, Then Understand It

Map

Arrows point from what you learn first to what it opens.

  • Proven to level123
  • Open
  • Locked
  • Comes back deeper
Level 2ContainerContainer imageControl planeDeploymentPodReconciliationService

Learning path

In the order the concepts build on each other.

  1. Container imageReadyA packaged, read-only snapshot of an application and everything it needs to run - code, libraries and configuration.
  2. ContainerLockedAn isolated process (or group of processes) running from a container image, with its own view of files, network and process IDs.Opens after: Container image
  3. Control planeLockedThe brain of a Kubernetes cluster - the API server, scheduler and controllers that store what you asked for and make it happen.Opens after: Container
  4. PodLockedThe smallest thing Kubernetes runs - one or more containers that share a network address and storage and are scheduled together.Opens after: Container
  5. ReconciliationLockedIn Kubernetes, reconciliation is the continuous loop that compares the desired state of a resource (written in YAML or a Custom Resource) with its actual state in the cluster, taking corrective action to close any gaps. This self-healing control loop is the foundational mechanism behind all built-in objects and custom operatorsOpens after: Pod, Control plane
  6. ServiceLockedA stable name and address in front of a changing set of Pods, load-balancing traffic to whichever ones are healthy.Opens after: Pod
  7. DeploymentLockedA Kubernetes object that keeps a set number of identical Pods running and rolls out new versions gradually.Opens after: Pod, Reconciliation

Connections to other domains