Learn KUBERNETES with Real Code Examples

Kubernetes provides automated container scheduling, scaling, and self-healing capabilities.

Supports declarative configuration via YAML or JSON manifests.

Manages container networking, storage, and service discovery automatically.

Extensible through custom controllers, operators, and APIs.

Facilitates hybrid and multi-cloud deployments for modern cloud-native applications.

Pods - smallest deployable units in Kubernetes

Services - abstract network access to pods

Deployments - declarative updates and scaling

ConfigMaps and Secrets - configuration and sensitive data management

Namespaces - multi-tenancy and resource isolation

Pod - group of containers deployed together

Node - physical or virtual machine running pods

Service - abstraction for exposing pods

Deployment - manages pod replicas and updates

ConfigMap/Secret - external configuration and sensitive data

manifests/ - Kubernetes YAML files

charts/ - Helm charts for templated deployments

src/ - application code

Dockerfile - container build configuration

k8s/ - scripts and utilities for cluster management

Define application deployment in YAML manifest

Apply manifest with `kubectl apply -f`

Monitor pod status and logs

Scale application using deployments or HPA

Update application with rolling updates

Beginner: deploy single pod and service locally

Intermediate: multi-container deployment with ConfigMaps and Secrets

Advanced: configure auto-scaling, health checks, and rolling updates

Expert: manage multi-cluster deployments with operators

Enterprise: secure, multi-tenant production clusters with CI/CD

Kubernetes vs Docker Swarm: more feature-rich, steeper learning curve

Kubernetes vs Nomad: Kubernetes offers extensive ecosystem and flexibility

Kubernetes vs OpenShift: OpenShift adds enterprise features and UI

Kubernetes vs Rancher: Rancher is management layer for Kubernetes clusters

Kubernetes vs ECS: ECS tightly integrated with AWS, Kubernetes is cloud-agnostic

2014 - Initial release by Google

2015 - Kubernetes 1.0 stable release

2016 - CNCF takes over maintenance

2018 - Ingress and StatefulSets stabilized

2025 - Latest stable version with enhanced security, scalability, and API features

Pod - smallest deployable unit with containers

Node - machine that runs pods

Service - exposes pods internally or externally

Deployment - declarative management of pod replicas

Ingress - external HTTP routing to services