Harikrishnan JR
I build, break, and automate infrastructure at scale. Sharing real-world Kubernetes deep dives, CKA prep notes, troubleshooting war stories, and AI + DevOps experiments.
Talks & Knowledge Transfer
Sessions I've presented internally and externally
MongoDB Upgrade with Mongosync
Walked the team through a zero-downtime MongoDB upgrade from 5.0 to 8.0 using Mongosync for continuous cluster-to-cluster replication, covering setup, cutover strategy, and verification.
Latest Posts
From the trenches of production
Zero-Downtime MongoDB Migration: 5.0 to 8.0 with Mongosync and Blue-Green Deployment
The problem, in one line: I needed to upgrade a production MongoDB cluster from version 5.0 to 8.0 — without taking the live application down. ## Wh…
How I Saved ~₹24 Lakhs a Year on Azure with a Custom Cost-Optimization Pipeline (Built with AI as a Co-Pilot)
How rerouting Azure Application Gateway logs from Log Analytics to Blob Storage, backed by a custom caching dashboard, cut monitoring costs by 95% with zero downtime.
Understanding Envoy Proxy
A technical walkthrough of Envoy Proxy — what it is, why it exists alongside Nginx and HAProxy, how xDS makes it dynamic, and how it powers the Kubernetes Gateway API.
Want to know more about my journey?
From first kubectl apply to managing multi-cloud Kubernetes clusters — I document everything.