Rajesh Kumar

1. What is Background Check of Employee? An Employee Background Check is the process of verifying the personal, educational, professional, and sometimes criminal history of a potential…

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…

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….

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…

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…

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,…

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…

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)…

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…

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…

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,…

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….

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

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…

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…

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…

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…

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…

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…

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…

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…

The cheapest WhatsApp Business API provider from India in 2026 is WAPI (wapi.in.net), closely followed by BOL7 and WABA Connect, all offering transparent, low-cost plans designed for…

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…

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…

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…

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…

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,…

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…

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 —…

To run Keycloak 17+ (Quarkus) with MySQL on the same server (XAMPP/LAMPP). It covers two supported setups. Pick A (TCP) for a production-style config, or B (UNIX…