Author: Rajesh Kumar

1. Users Use case: Add your DevOps engineers, SREs, or business analysts as users with the right permissions. 2. API Clients Use case: When Jenkins, Ansible, or Terraform needs to…

In AppDynamics, both Dashboard and Dash Studio are used to visualize application performance and monitoring data, but they differ in features, flexibility, and intended use cases: 1. Dashboards (Classic Dashboard)…

In today’s aviation environment, cutting-edge electronics are at the heart of safety, navigation, communication, and even passenger experience. The Avionics Technician page by Astronaut & Pilot offers a clear and…

I’ll show console + CLI where useful and give a quick troubleshooting section at the end. 0) Prereqs 1) Create a public hosted zone for rajesh.com Console Route 53 →…

Below is a complete, copy-pasteable, step-by-step guide to put OIDC (Amazon Cognito) + ALB Ingress + gRPC (EKS) behind your DNS with TLS. I’ve included all commands, manifests, and verification…

Here’s a GitHub Self-Hosted Runners FAQ you can use as a quick reference or to share with your team: GitHub Self-Hosted Runners – FAQ 1. What is a self-hosted runner?…

Here’s the exact JMeter setup to create Owners athttp://43.204.220.89:8080/petclinic/owners/new. Thread Group (your load) Config Elements Samplers & Post-Processors 1) GET form page (fetch cookies and optional CSRF) Sampler: HTTP Request…

Step-by-step guide to set up and work with alerts in AppDynamics (the screen you shared is the Alert & Respond → Policies page). 0) How AppDynamics alerts are wired You’ll…

Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech blog at DevOps School, travel stories at Holiday Landmark, stock market…

DataOps Certified Professional (DOCP) Global Certification by DevOpsSchool The DataOps Certified Professional (DOCP) is an internationally recognized certification designed by DevOpsSchool to prove expertise in DataOps principles, tools, and automated…

What is DataOps? DataOps is a set of practices, processes, and technologies that apply DevOps principles to data management—streamlining collaboration between data engineers, analysts, and IT teams. The goal is…

1. 🔎 What is JWT? Definition Structure 2. 🔎 What is OIDC? Definition Key OIDC Tokens 3. ❓ Why do we need them? JWT OIDC 4. ⚙️ How each works…

1. Understanding the Role of Each Resource IngressClassParams A Custom Resource Definition (CRD) used with the AWS Load Balancer Controller. It defines AWS-specific settings for your ALB—like scheme (internet-facing/internal), IP…

In AppDynamics, you correlate data across the App Agent, Machine Agent, and Database Agent by giving the Controller enough shared context to stitch them together. Here’s the practical way to…

1) Prerequisites 2) Get your APM endpoint & token/key from Elastic Cloud 3) Download the Elastic APM Java Agent Create a directory for the agent and download the current jar:…

In GitHub Enterprise, “commands” typically means GitHub CLI (gh) commands and admin-level REST/GraphQL API calls that administrators use to manage organizations, repositories, users, and enterprise settings. Here’s a categorized list…

here’s an up-to-date, in-depth shortlist of 20 reputable, regulation-aligned SMS/OTP providers with global reach (and strong India support where relevant). “Government recognized” varies by country; in practice this means the…

You want a deep, in-depth tutorial that explains SSL/TLS certificates, their types, domain coverage, paid vs free options, and especially a detailed guide for requesting and issuing Let’s Encrypt certificates…

You can do this directly with Meta’s WhatsApp Business Platform (Cloud API) from your own app/website. Below is a complete, no-BSP, end-to-end checklist you can follow. I’ve included short code…

here’s an up-to-date, Meta-supported shortlist of 20 global WhatsApp Business Solution Providers (BSPs), each with quick “about / pros / cons,” plus a compact pricing-model table. (Meta’s partner status can…

The cheapest WhatsApp Business API provider from India in 2025 is WAPI (wapi.in.net), closely followed by BOL7 and WABA Connect, all offering transparent, low-cost plans designed for small to large…

Here’s your end-to-end, no-gaps guide. I’ll keep the vocabulary crisp and the mental model consistent. The layers “KafkaConsumer is NOT thread-safe” — what this actually means Unsafe patterns (don’t do…

using Laravel Passport—the oauth_access_tokens table balloons when tokens aren’t expiring, not being revoked on logout, or not being purged. Here’s a practical, safe cleanup + prevention plan you can apply…

The top 5 AI tools for generating the best quality and most impressive images in 2025 are DALL-E 3, Midjourney, Leonardo AI, Adobe Firefly, and Google Imagen 3 (via Gemini/ImageFX)….

It covers Android SDK, Java (JDK), Flutter, Path wiring, Plugin setup, Validation, AVD/emulator, and creating a project—plus quick fixes. Assumptions: default shell = zsh, Apple Silicon path (/opt/homebrew). If you’re…

Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I have worked at Cotocus. I share tech blog at DevOps School, travel stories at Holiday Landmark, stock market…

Area Sub‑Area Action Items 0) Readiness & Goals SLOs & Metrics Define business SLOs, Core Web Vitals, establish baselines, create dashboards, prepare test data Profiling Enable APM/Tracing, endpoint heatmaps, profilers,…

Here’s a clear, end-to-end tutorial you can keep handy. It explains what “socket-based” vs “TCP-based” really means, how to tell which one you’re using, and how to configure apps for…

Here’s a clean, up-to-date, “everything you need” CLI guide you can keep nearby. I’ll cover: I’m using Keycloak 26.x syntax (matches the 26.3.x you’re running). kc.sh — Keycloak server CLI…