Kubernetes Overview

Introduction

Kubernetes is an open-source container orchestration platform that automates containerized application deployments, scaling, and management. It abstracts the underlying infrastructure and provides a unified API for managing containers, services, and networking. Kubernetes follows a client-server architecture, with a controller node managing the cluster’s state and worker nodes running the containers. It ensures high availability, load balancing, and self-healing capabilities for applications. Kubernetes enables seamless scaling and rolling updates, making it a powerful solution for modern application deployment and management.

Kubernetes architecture

We’ll be examining some key terms in the Kubernetes architecture below.

• Node: A node is a worker machine in Kubernetes responsible for carrying loads on the cluster. They’re of two types, the controller and worker nodes. The controller node houses the main components (API server, that run activities such as scheduling loads to the worker nodes, and they also manage them. Every node has a container runtime and kubelet. These nodes also house the pods that run the application.

• Pods: A pod is the smallest unit in Kubernetes. They create a layer on top of containers and run one application within them. They’re deployed, created, and destroyed with the aid of deployment scripts. Pods are edited through the deployment script running them. When a pod dies or exists in the cluster, Kubernetes scales up another to replace it. Pods run through deployment scripts which run on worker nodes.

• kubelet: The kubelet is responsible for handling the communication between the controller and node. It handles the running process of pods ...