#DevOps

From On-Prem Bare Metal to EKS: A Real Migration Journey (Design, Pitfalls, and Lessons)

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1. Introduction: Why Move from Bare Metal to EKS Angle: “We’re not just moving pods; we’re moving an entire ecosystem: networking, storage, security, observability, and people.” 2. Current State Assessment (On-Prem Cluster) Explain that any good migration starts with brutally honest discovery. Cover: Pitfall to highlight: “Most teams underestimate the number of ‘hidden’ dependencies: hard‑coded … Read more

Kubernetes Deployment Strategies: A Complete Guide for Production-Grade Releases

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Introduction Deploying a new version of your application in Kubernetes isn’t just kubectl apply -f. How you deploy matters as much as what you deploy. The wrong strategy can cause downtime for thousands of users. The right one can make a risky release feel invisible. With 82% of container users running Kubernetes in production, mastering deployment strategies isn’t optional — … Read more

The Ultimate Guide: Kubernetes Cluster on AWS — From Zero to Production

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Table of Contents 01 — What is Kubernetes & Why AWS EKS? Kubernetes (K8s) is an open-source container orchestration platform that automates deployment, scaling, and management of containerized applications. Originally built by Google in 2014, it is now used by almost every major tech company in production environments. Amazon EKS (Elastic Kubernetes Service) is AWS’s fully … Read more

Mastering Kubernetes Air-Gap Deployments: Complete Guide

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Kubernetes air-gapped clusters run in isolated environments without internet access, essential for high-security sectors like defense, finance, and utilities. These setups demand offline preparation of images, packages, and configurations to bootstrap and maintain clusters securely. What is an Air-Gapped Kubernetes Cluster? Air-gapped means complete network isolation from the internet, preventing external pulls for images or … Read more

Kubernetes Upgrades — How Not to Mess It Up

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A real-world guide for DevOps engineers who want zero-downtime upgrades and zero post-mortems The Story That Started This Guide The alert came in at 9:47 PM. “API server unreachable.” The on-call engineer opened his laptop to find that the cluster upgrade — which was “just a version bump from 1.27 to 1.28” — had gone completely sideways. The … Read more

Kubernetes Pod Disruption Budget (PDB) — Complete Guide with Examples

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Picture this: it’s a Tuesday afternoon. Your infra team is draining a node for routine maintenance. Looks straightforward. Then your monitoring goes red — every single replica of your payment service got evicted at the same time. Zero pods up. Full outage. Nobody planned for that. Nobody set any guardrails. And that’s exactly the problem … Read more

CrashLoopBackOff in Kubernetes — What It Really Means and How to Actually Fix It

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It’s 11 PM. Your deployment just went out. Slack is blowing up. You check the cluster and see it — that dreaded status: NAME READY STATUS RESTARTS AGEmy-app-7d9f8b 0/1 CrashLoopBackOff 8 12m Eight restarts. Climbing. And you have no idea why. If you’ve worked with Kubernetes for more than a week, you’ve seen this. CrashLoopBackOff … Read more

Kubernetes Pod Lifecycle: A Complete Deep Dive

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You ran kubectl apply, your terminal said “pod created,” but the app is still down. Sound familiar? I’ve been there. 2 AM. Production alert firing. Pod shows Running but requests are failing. No obvious errors. That’s when I realized — I didn’t actually understand the Pod lifecycle. I just knew enough to deploy things and pray. Once I … Read more

Kubernetes Architecture Explained (From Real Production Experience)

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😅 The Night Kubernetes Just… Froze Let me tell you something that still stays with me. It wasn’t one of those loud production outages where everything turns red and alarms go crazy. It was worse. Things just quietly stopped working. We had pushed a deployment, everything in CI/CD was green, configurations looked perfect, and nothing … Read more

Kubernetes Security in Real Production: A Practical DevSecOps Guide That Actually Works

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Let’s be honest — Kubernetes security isn’t just about turning on RBAC or running an image scan once in your CI pipeline.If that’s all you’re doing, you’re only covering the surface — not the real risks. In my experience, most Kubernetes breaches don’t happen because someone found an exotic zero‑day. They happen because of the … Read more