It is 4:47 PM on a Friday. You merged a pull request, the CI pipeline passed, and the deployment to production completed without errors. But then the Slack messages start: "Is the app down?" "I'm getting a 500 error." "The checkout page is broken." Y...

Welcome back! 👋 Day 52 of the 100 Days Cloud DevOps Challenge, and today we're mastering Kubernetes Rollbacks! This is production survival skill - quickly reverting bad deployments to restore service. Let's recover! 🎯 🎯 The Mission - Emergency Rol...

Branches: Keeping the Main Copy Clean The idea of branches is straightforward: The main branch (in most repos now called main) is the stable copy of the project. Developers create separate branches to work on new features or sprint-specific changes w...

I tried implementing a mini in-memory key-value data store that supports transactions, rollback, and commit — just to see how databases handle these operations under the hood. Turns out, it’s a fascinating journey of layers, reversibility, and data i...
