gRPC Full Guide: Concepts, Implementation
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…
Comprehensive Guide to Communication Protocols
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…
Rundeck Assignments 2 – Windows
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…
Rundeck Assignments 1 – Linux
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…
What is Rundeck?
✅ 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…
Rundeck Basic Workflow: Step-by-Step
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…
Top 21 DevSecOps Tools with Key Features
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…
Feature-by-Feature Comparison: Argo CD vs Flux
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…
OpenShift – Practical Guide to NetworkPolicy
URL – https://www.devopsschool.com/blog/kubernetes-cks-network-policy-example-code/ 🔐 OpenShift NetworkPolicies Tutorial (with httpd in test2 namespace) 🎯 Goal You will: ✅ Deploy an httpd server✅ Launch test clients to access it✅…
OpenShift BuildConfig Tutorial
✅ What is OpenShift BuildConfig? BuildConfig in OpenShift is a Kubernetes-native custom resource provided by OpenShift that defines how to build a container image from source code….
Top Free WordPress Themes for Technical Blogging
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. ✅…
Increasing the Maximum Image Upload Size on a WordPress Site
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…
Top Real-Time Collaborative Web-Based Text Editors
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…
List of best localization and translation platforms
Here’s a comprehensive list of localization and translation platforms categorized into Open Source, Cloud-based (SaaS), and Self-hosted/Enterprise solutions. Each tool includes a key feature, and at the…
GitHub Organization Policies – Complete Guide
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 is GitHub App Installation Token?
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…
What is a GitHub App?
🧠 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,…
What is Google Cloud NAT?
🚀 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…
Troubleshooting Guide to Resolving 500 Errors in Kubernetes Production Environments
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…
What is Google Cloud CDN?
📌 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…
How to Assign a Static IP to a Docker Container in Bridge Mode
In this guide, you’ll learn how to assign a static IP address to a Docker container using a custom bridge network. This IP address will remain fixed…
Openshift Tutorials for DeploymentConfigs
OpenShift DeploymentConfigs are a core resource in OpenShift used to manage the deployment and lifecycle of applications. While Kubernetes uses Deployments to manage the rolling updates of…
How SSL/TLS Certificates Work: Setup & Manual Renewal using acme.sh
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…
Openshift Admin: How to add node to the cluster in openshift Local
To add a node to an OpenShift cluster running locally using OpenShift Local (previously known as CodeReady Containers or CRC), the process involves configuring a multi-node cluster…
Openshift Admin: How to add node to the cluster in openshift ARO
New Method : How to Add Nodes to ARO (Worker Node Scaling) If you are using the latest ARO architecture, which now uses Azure Machine Pools (based…
What are Security Context Constraints (SCC) in OpenShift?
🔐 What are Security Context Constraints (SCC) in OpenShift? Security Context Constraints (SCC) are OpenShift’s mechanism for controlling security-sensitive aspects of how containers run in the cluster….
OpenShift-Supported Container Images Registry
OpenShift provides officially supported container images that are fully compliant with its security and operational requirements. These images are designed to run smoothly on OpenShift with non-root…
Terraform tfenv Tutorial: From Basic to Advanced
What is tfenv? tfenv is a Terraform version manager that allows you to easily install and manage multiple versions of Terraform on your system. You can switch…
Comprehensive Guide to DNSControl
Comprehensive Guide to DNSControl Table of Contents 1. Introduction to DNSControl DNSControl is an open-source tool developed by Stack Exchange to manage DNS zones across multiple providers…
OpenShift Container Platform (OCP) Installation and Configuration Guide
# Deployment Method Platform/Infra Best Use Case Automation Level Notes 1 IPI (Installer-Provisioned Infra) AWS, Azure, GCP, vSphere Fast, full-stack automated production setup ✅ Fully automated Installer…