Troubleshooting Guide to Resolving 500 Errors in Kubernetes Production Environments

Source – https://github.com/rajeshkumarin/k8s-500-prod-issues ๐Ÿ“˜ 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…

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What is Google Cloud CDN?

๐Ÿ“Œ 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…

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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…

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Don’t Guess, Research: The Strategic Advantage of B2B Market Intelligence

In the world of B2B business, to take arbitrary decisions based on the intuition of business runners is to court disaster. Think of a chess champion entering a tournament without…

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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…

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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. ๐Ÿ“œ SSL/TLS Website Certification: How…

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Where to Buy Harvard Recommendation Letters

The desire to attend Harvard University leads many students to seek out every possible advantage. Recommendation letters are among the most influential application components, carrying a significant amount of weight….

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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….

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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…

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What are Security Context Constraints (SCC) in OpenShift?

๐Ÿ” What are Security Context Constraints (SCC) in OpenShift? Security Context Constraints (SCC) are OpenShiftโ€™s mechanism for controlling security-sensitive aspects of how containers run in the cluster. SCCs define a…

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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,…

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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…

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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,…

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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 โœ… Fully automated Installer provisions infra and…

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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. โ˜๏ธ What is Azure…

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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 โ€“ CodeReady Containers) on Linux laptops/desktops for local development and testing. ๐Ÿง OpenShift Local…

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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. ๐ŸŽ OpenShift Local on macOS โ€“ Overview…

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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. ๐Ÿข About…

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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…

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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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How to install & configure Elastic Filebeat?

Filebeat client is a lightweight, resource-friendly tool that collects logs from files on the server and forwards these logs to your Logstash instance for processing. Filebeat is designed for reliability…

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Smart Ways Agencies Are Expanding Their SEO Offerings in 2025

The digital marketing world doesnโ€™t sit still for long, and neither do client expectations. In 2025, SEO continues to be a cornerstone of most marketing strategies, but delivering great results…

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Follow-Up Sales Emails That Keep the Conversation Going

In sales, success isnโ€™t always about closing on the first pitchโ€”itโ€™s about persistence. Many deals donโ€™t close after a single email, a one-time call, or an initial meeting. Thatโ€™s where…

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How Responsive Design Drives Mobile Conversions

Responsive design adapts a siteโ€™s layout to any screen size. Today, more people browse on phones than desktops. Yet mobile users often abandon slow, cramped pages. That gap hurts your…

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Looking to Study Abroad? We Know Who Can Help You.ย ย 

Studying abroad is an incredible experience and has so many benefits โ€” new cultures, a globalized perspective, and education at some of the best universities in the world. With so…

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Beyond Dashboards: Creating a Data Culture With Tools Your Team Already Knows

If you are striving for a data-driven culture in the workplace, you might think you need more dashboards and the latest analytics platforms.  However, the truth is that data culture…

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How AI Solvers Are Changing the Way We Study for Exams

Almost every industry is being transformed by artificial intelligence (AI): transportation, healthcare, education, among others. AI applications in the field of education are affecting the way a student prepares for…

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The Rise of AI Detection: Are Plagiarism Checkers Keeping Up?

Photo by Glenn Carstens-Peters from Unsplash.com It’s no secret that artificial intelligence has completely shaken up how we write, learn, and share ideas. With tools like ChatGPT, writing an essay,…

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DNS concepts

๐Ÿ“˜ 1. Basics of DNS What Is DNS? The Domain Name System (DNS) is the Internet’s phonebook. It translates human-friendly domain names (like www.example.com) into IP addresses (like 192.0.2.1) that…

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Managing MariaDB Root Password and Connection Behavior in XAMPP (Ubuntu)

โ˜๏ธ Introduction When working with MariaDB/MySQL inside XAMPP on Ubuntu, many developers face confusing issues related to root password behavior, localhost vs 127.0.0.1 access, and authentication plugins.This tutorial provides a…

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