Tag: devops

• When Let's Encrypt Broke Our HL7 mTLS: A Certificate Incident Post-Mortem (10 Mar 2026)
  A public CA silently dropped the clientAuth EKU from renewed certificates, breaking our healthcare HL7 mTLS integration. Here's what happened, what we learned, and why self-managed CAs are the right choice for healthcare interoperability.
• EKS AL2023 Migration + Upgrade to 1.34 — Lessons Learned (10 Mar 2026)
  Lessons learned from upgrading EKS clusters from 1.32 to 1.34 with AL2023 migration, including the reasoning behind VPC-CNI version pinning at v1.19.2 and add-on compatibility assessment
• Kubernetes Architecture Deep Dive: Understanding Every Component (28 Nov 2025)
  Complete guide to Kubernetes control plane, worker nodes, and add-ons with real-world examples and troubleshooting
• Prometheus and Grafana: A Practical Monitoring Guide (23 Nov 2025)
  Learn how to set up Prometheus and Grafana for monitoring your infrastructure. From basic concepts to production-ready configurations for Docker, Kubernetes, and EC2 environments.
• Docker and Containers - From Fundamentals to Production (21 Nov 2025)
  Comprehensive guide to containers, Docker architecture, networking, volumes, multi-stage builds, security hardening, and production troubleshooting for mid-level engineers
• Migrating to Cloudflare Pages Build Image v3 (Without Breaking Your Site) (15 Nov 2025)
  Upgrading Cloudflare build image
• Terraform AWS Multi-VPC Architecture Guide (13 Nov 2025)
  Building a production-ready multi-tier architecture with VPC peering, Auto Scaling, RDS, and ECS Fargate for log aggregation
• Kubernetes Real-World Troubleshooting Guide (13 Nov 2025)
  Production debugging scenarios with container crashes, config issues, and systematic troubleshooting workflows
• Kubernetes Network Troubleshooting Guide (13 Nov 2025)
  Real-world network debugging techniques for production Kubernetes
• AWS ECS Fargate Complete Guide - From Zero to Production (13 Nov 2025)
  Hands-on guide to deploying containerized applications with ECS Fargate, including ECR, IAM, secrets management, auto-scaling, and troubleshooting