January 2026Monthly Archives

Blockchain technology is often described as decentralized and trustless, but in practice, most real-world blockchain applications are built using a combination of on-chain and off-chain systems. Understanding how these two layers work together is essential for building scalable, secure, and user-friendly blockchain platforms. What is On-Chain? On-chain refers to all… Continue Reading Understanding On-Chain and Off-Chain in Blockchain

Introduction As a DevOps engineer, maintaining consistency across Kubernetes environments is a constant battle. Manual deployments, ad-hoc kubectl apply commands, and configuration drift often lead to operational headaches and production outages. The solution is GitOps. By adopting ArgoCD, we treat Git as the single source of truth for our cluster… Continue Reading Implementing GitOps with Argo CD: Installation and Initial Deployment

Introduction Terraform is an infrastructure-as-code tool that lets you define both cloud and on-prem resources in human-readable configuration files that you can version, reuse, and share. You can then use a consistent workflow to provision and manage all of your infrastructure throughout its lifecycle. Terraform can manage low-level components like… Continue Reading How to Create an AWS EC2 Instance Using Terraform in Ubuntu

Introduction This guide explains how to restore an ELK (Elasticsearch, Logstash, Kibana) stack from backup in a clean, structured, and production-safe manner.It is designed as a Disaster Recovery (DR) Runbook, suitable for system administrators managing ELK in production environments. Prerequisites Backup ScopeIncluded in Backup 1. Elasticsearch data (/var/lib/elasticsearch) 2. Elasticsearch… Continue Reading How to Perform ELK Server Backup, Restore, and Recovery (Elasticsearch 7.17.x)