Learn KUBERNETES-YAML with Real Code Examples

Kubernetes orchestrates containers across multiple hosts, ensuring high availability and scalability.

Uses YAML manifests to define resources like Pods, Services, Deployments, and ConfigMaps.

Supports declarative configuration for infrastructure and applications.

Automates scheduling, scaling, and self-healing of containers.

Provides extensible APIs and integrations with cloud and CI/CD systems.

Pods - smallest deployable unit

Deployments - manage stateless apps and updates

Services - abstract network access to pods

ConfigMaps and Secrets - configuration and sensitive data management

Namespaces - logical cluster partitioning

Cluster - group of nodes running Kubernetes

Pod - one or more containers sharing network/storage

Deployment - ensures desired number of pod replicas

Service - stable network endpoint for pods

Namespace - isolates resources within a cluster

Deployment YAMLs for applications

Service YAMLs for networking

ConfigMaps and Secrets YAMLs for configuration

Namespace YAMLs for logical separation

Ingress and NetworkPolicy YAMLs for access control

Write YAML manifests for resources

Apply manifests with kubectl apply

Monitor pods, deployments, and services

Scale or update deployments as needed

Manage secrets and configuration with ConfigMaps and Secrets

Beginner: Deploy single container pod

Intermediate: Deploy multi-container deployment with service

Advanced: Configure ingress, secrets, and persistent volumes

Expert: Build CI/CD pipeline integrated with K8s

Architect: Multi-cluster or hybrid cloud orchestration

Kubernetes vs Docker Swarm: feature-rich vs simpler

Kubernetes vs Nomad: enterprise orchestration vs lightweight

Kubernetes vs OpenShift: upstream vs enterprise distribution

Kubernetes vs ECS: vendor-agnostic vs AWS integrated

Kubernetes vs Rancher: orchestration vs management layer

2014 - Kubernetes 1.0 released by Google

2015 - Kubernetes donated to CNCF

2017 - Kubernetes 1.6 with stable RBAC

2019 - Kubernetes 1.14+ support for Windows nodes

2020+ - Kubernetes 1.18+ with enhanced CRDs, Operators, and cloud-native integrations

Pod - smallest deployable unit, can contain one or more containers

Deployment - manages desired state of pods

Service - stable network endpoint for accessing pods

ConfigMap - non-sensitive configuration data

Secret - sensitive configuration data (passwords, keys)