Top 21 DevSecOps Tools with Key Features
Here’s a curated list of the 21 most popular and widely adopted DevSecOps tools in 2025, along with short descriptions and a summary comparison table at the end. 🔐 Top…
Read more »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 ✅ Yes ✅…
Read more »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✅ Apply NetworkPolicy to:…
Read more »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. It automates the…
Read more »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. ✅ Top Free WordPress…
Read more »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 (often anywhere from…
Read more »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 follows to help…
Read more »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 end, you’ll find…
Read more »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 are GitHub…
Read more »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 — on behalf…
Read more »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, GitHub Apps have…
Read more »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 Cloud VPC subnets,…
Read more »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 to unresponsive terminating…
Read more »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 caching it closer…
Read more »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 even after your…
Read more »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 applications, OpenShift introduces…
Read more »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 Website Certification: How…
Read more »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 in OpenShift Local….
Read more »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 on the OpenShift…
Read more »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. SCCs define a…
Read more »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 users, proper permissions,…
Read more »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 between different versions…
Read more »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 using a declarative,…
Read more »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 provisions infra and…
Read more »OpenShift Install & Configurations using Azure Red Hat OpenShift (ARO) with Azure Portal
Here is the latest step-by-step guide (as of May 2025) to install and configure OpenShift using Azure Red Hat OpenShift (ARO) directly from the Azure Portal. ☁️ What is Azure…
Read more »OpenShift Install & Configurations using OpenShift Local in Linux laptops/desktops
Here is the correct and updated step-by-step guide to install and configure OpenShift Local (formerly CRC – CodeReady Containers) on Linux laptops/desktops for local development and testing. 🐧 OpenShift Local…
Read more »OpenShift Install & Configurations using OpenShift Local in MacOS laptops/desktops
Here is the step-by-step guide to correctly install and configure OpenShift Local (CRC) on macOS laptops or desktops for local OpenShift 4.x development. 🍎 OpenShift Local on macOS – Overview…
Read more »About Elastic (The Company)
Certainly! Here’s a detailed overview of Elastic N.V. (commonly known as Elastic, the company behind Elasticsearch), covering its transformation, history, key milestones, product evolution, and major release timelines. 🏢 About…
Read more »How to install kibana and configure with Elasticsearch
Download & Extract kibana 8.x Configure kibana 8.x Download, Extract, Install and Configure kibana 9.x vi config/kibana.yml ./bin/kibana –allow-root Provide Enrollment Kye of ElasticSearch Login to Kibana using elasticsearch username/password…
Read more »Install and Configure Elasticsearch: Step by Step Guide
Install and Configure Elasticsearch in Linux Download and Extract Elasticsearch Run and Verify Elasticsearch 7.x Run and Verify Elasticsearch 8.x Run and Verify Elasticsearch 9.x ubuntu@ip-172-31-38-122:~$ curl –cacert /home/ubuntu/elasticsearch-9.0.0/config/certs/http_ca.crt -u…
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