Author: Rajesh Kumar

Here’s a complete guide to running Ansible Playbooks using Rundeck, covering all supported methods, including what you’ve done, plus troubleshooting options and best practices. ✅ Goal Run an Ansible Playbook…

🛡️ What is Fortify? Fortify is a Static Application Security Testing (SAST) tool developed by Micro Focus (now part of OpenText). It helps developers and security teams identify vulnerabilities early…

System Requirements for Rundeck Supported Operating Systems: Amazon EC2 Supported Database. Supported Log store Others Important Network access How to Install Rundeck OSS in Ubtunu? Step 1- Install Java $…

Excellent question. When we say AWS ALB “downgrades HTTP/2 → HTTP/1.1”, it means that although the client connects to ALB over HTTP/2, ALB then connects to your backend (e.g., EKS…

That’s a great question. The reason it’s hard to visually spot the difference in a gRPC request is because it’s a binary protocol over HTTP/2, unlike human-readable formats like REST…

Here’s a complete and standalone guide to gRPC, suitable for beginners and intermediate engineers who want to use gRPC in real-world applications, especially in a cloud-native or AWS-based architecture. 🌐…

This guide covers the most common communication protocols used in modern cloud-native architectures, compares their capabilities, and discusses when to use each. It also analyzes support and limitations within the…

Rundeck Student Assignments (Windows Local Node) 📝 Setup Prerequisites: 🎓 Assignment List Assignment 1: Hello World in PowerShell Objective: Run a basic PowerShell script as a Rundeck job. Assignment 2:…

Rundeck Student Assignments (Local Node Only) — Assignment 1: Hello World Job Objective: Learn to create and execute your first Rundeck job. Assignment 2: Disk Usage Check Objective: Monitor disk…

✅ What is Rundeck? Rundeck is an open-source tool used for Runbook Automation, designed to help DevOps teams, SREs, and IT operations teams automate routine tasks, reduce toil, and manage…

Here’s a clear explanation of the Rundeck Basic Workflow, perfect for beginners or teams implementing Rundeck for the first time. 🔄 Rundeck Basic Workflow: Step-by-Step This describes the standard flow…

Here’s a curated list of the 21 most popular and widely adopted DevSecOps tools in 2026, along with short descriptions and a summary comparison table at the end. 🔐 Top…

Here is a very comprehensive, feature-by-feature comparison between Argo CD and Flux, including: 📊 Feature-by-Feature Comparison: Argo CD vs Flux Feature Argo CD Flux GitOps Core Functionality ✅ Yes ✅…

Here are some 100% free, full-page, mobile-friendly WordPress themes ideal for technical blogging — clean code, responsive design, fast performance, and great typography for long-form content. ✅ Top Free WordPress…

Increasing the upload file size limit in WordPress allows you to upload larger images (or other media) without errors. Many hosting providers set a default upload limit (often anywhere from…

Here’s a comprehensive list of top real-time collaborative, web-based text editors, including both open-source/self-hostable and cloud/SaaS platforms. Each tool includes its key features, and a feature-by-feature comparison follows to help…

GitHub Organization Policies are rules and settings enforced at the organization level to control how repositories, members, and integrations behave. These policies help you: 📘 Section 1: What are GitHub…

A GitHub App Installation Token is a short-lived access token that allows a GitHub App to interact with specific repositories or organizations where it has been installed — on behalf…

🧠 What is a GitHub App? A GitHub App is a first-class actor in the GitHub ecosystem. Unlike OAuth apps which act on behalf of a user, GitHub Apps have…

🚀 What is Google Cloud NAT? Google Cloud NAT (Network Address Translation) is a fully managed service that enables outbound internet connectivity for resources in private Google Cloud VPC subnets,…

Source – https://github.com/rajeshkumarin/k8s-500-prod-issues 📘 Scenario #1: Zombie Pods Causing NodeDrain to HangCategory: Cluster ManagementEnvironment: K8s v1.23, On-prem bare metal, Systemd cgroupsScenario Summary: Node drain stuck indefinitely due to unresponsive terminating…

📌 What is Google Cloud CDN? Google Cloud CDN is a globally distributed content delivery network that accelerates the delivery of your web and media content by caching it closer…

Here’s a well-structured and comprehensive tutorial based on your notes, with added explanations, examples, and a professional tone suitable for blog publication or internal documentation. 📜 SSL/TLS Website Certification: How…