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Kubernetes & Containerized Workloads

Kubernetes is an open-source container orchestration system that automates deployment, scaling, and management of containerized applications. AWS EKS provides a managed Kubernetes service that simplifies running Kubernetes clusters on AWS.

Why Kubernetes?

Kubernetes is essential for modern cloud-native applications because:

  • Ensures high availability by automatically replacing failed containers.
  • Provides scalability through auto-scaling policies.
  • Facilitates microservices with service discovery and load balancing.
  • Supports multi-cloud and hybrid deployments.

Key Components of Kubernetes

  • Pods & Deployments – Fundamental units in Kubernetes.
  • Services – Enable communication between microservices.
  • Ingress – Manages external access to services.
  • ConfigMaps & Secrets – Handle configuration and sensitive data.
  • Horizontal Pod Autoscaler (HPA) – Adjusts replicas based on demand.

Real World Experience

I deployed Kubernetes on AWS EKS for a high-traffic SaaS application. The biggest challenges included managing persistent storage, handling zero-downtime deployments, and optimizing autoscaling policies for cost efficiency.

Common Challenges & Solutions

  • Cold Starts – Use warm pools to reduce startup time.
  • Networking Issues – Implement Calico for better network policy control.
  • Monitoring & Logging – Use Prometheus and Grafana for better observability.

Basic Kubernetes Deployment

apiVersion: apps/v1
kind: Deployment
metadata:
  name: my-app
spec:
  replicas: 3
  selector:
    matchLabels:
      app: my-app
  template:
    metadata:
      labels:
        app: my-app
    spec:
      containers:
      - name: my-app
        image: my-app:latest
        ports:
        - containerPort: 80

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