Latest Blogs on Ansuman Satapathy

Ever Wondered How Docker Actually Works Under the Hood?

Thu, 12 Mar 2026 08:47:25 +0530

If you use Docker daily, the workflow becomes second nature:

docker pull
docker build
docker run

Containers appear, applications start, and everything “just works”.

But if you’re a software engineer or working in infrastructure, treating Docker like a magical black box is not ideal. Containers are not virtual machines, and Docker isn’t creating tiny computers.

Under the hood, a container is simply a Linux process that the kernel isolates using a few powerful features.

Terraform Best Practices: How to Not Nuke Production

Sun, 25 Jan 2026 20:30:00 +0530

Writing Terraform is easy. Managing Terraform at scale without destroying your company’s infrastructure is hard.

If your idea of “state management” is a file on your laptop named terraform.tfstate.backup2, stop. Here are some tips to not embarrass yourself in front of management.

1. Remote State is Non-Negotiable

If you work on a team (or ever plan to), your state file cannot live on your local machine.

The Problem: If two people run terraform apply at the same time with different local states, you get a race condition that corrupts everything.
The Fix: Use a Remote Backend (like AWS S3).
The Lock: Use DynamoDB for state locking. This prevents “Person B” from writing to the state while “Person A” is still deploying.

# backend.tf
terraform {
 backend "s3" {
 bucket = "my-corp-terraform-state"
 key = "prod/app-server/terraform.tfstate"
 region = "us-east-1"
 dynamodb_table = "terraform-state-locks"
 encrypt = true
 }
}

*Fig: Actual footage of a DevOps engineer looking at a local state file.*

2. Keep it DRY Dummy!

Stop Copy-Pasting resource blocks. If you need 5 web servers, do not write the aws_instance block 5 times. Use Modules.

Understanding Concurrency and Goroutines

Sun, 18 Jan 2026 17:02:11 +0530

If you listen to Senior Engineers talk about Concurrency, you’d think it’s the plot of a spy thriller.

“We have a Race Condition in the kernel! The Deadlock is spreading! If we don’t Mutex the shared memory in 10 seconds, the whole heap is going to blow!”

It sounds terrifying. It sounds complex. It sounds like you need a PhD in Computer Science and a leather trench coat to pull it off.

Git Rebase: How to Hide Your Shameful Commit History

Sun, 11 Jan 2026 22:12:03 +0530

Let’s be real for a second. Your actual development process involves roughly 45 commits named “wip”, “fixing typo”, “minor fix”, “ffs why isn’t this working”, and finally, “this time it works i think.”

Now, I can’t be the only one who has nightmares about juniors laughing at my commit history? Right? …Right? You never want this to happen. You want to look like a disciplined, experienced engineer who writes perfect code in a single, surgical commit.

How I Automated My Blog with Hugo and GitOps

Thu, 01 Jan 2026 15:42:59 +0530

This is the first blog of the site. So, I thought why not write about how I automated the infrastructure behind it so that I can put my focus on writing and also other important things in life like… (starts overthinking)

I really like Linux and automation and surprisingly I like to write too (which came as a late realization). I tried some blogging platforms like Hashnode and Dev.to. While the features they offer are really nice, I wanted something cleaner and distraction-free. Most importantly, I wanted to own what I write and have the power to change anything, anytime. And with great power, comes great memes.