Author: Rajesh Kumar

Here are the advanced performance engineering tools commonly used by developers for .NET programs and software in 2025: Category Tool(s) Why it’s the best (quick note) Code Profiling & Debugging…

let’s go step-by-step so Kafka partitions and consumer groups are crystal clear. 1. Kafka Partition Think of a Kafka topic as a folder and partitions as the individual files inside…

What is ITSM? IT service management (ITSM) is a framework for managing and delivering IT services. It is a set of processes and best practices that help organizations to improve…

Keycloak: Identity & SSO Tool (IAM in one box) What it is Keycloak is an open-source Identity and Access Management (IAM) platform that provides Single Sign-On (SSO), user federation, identity…

Absolutely! Ansible Tower (now called Controller in AAP) has a robust, well-documented REST API. You can use it to automate everything you do via the web UI—launch jobs, manage inventories,…

Below is a detailed Ansible tutorial covering execution strategies (linear vs free), task delegation, fact caching, and async jobs—with clear code examples, explanations, and a professional tutorial structure. 1. Understanding…

What is Ansible Collection? Ansible Collections are a standardized packaging format for distributing Ansible content (roles, modules, plugins, playbooks, and documentation). Introduced in Ansible 2.9+, collections allow you to easily…

Here’s a very detailed, step-by-step tutorial on Ansible Collections—covering what they are, why you need them, how to use them, how to create your own, and key best practices and…

What is Unit Testing in Ansible? Unit testing in Ansible refers to testing the smallest pieces of code within Ansible—primarily custom modules, plugins, or Ansible-related Python code—in isolation from the…

Here’s a comprehensive tutorial on all the ways to define and use variables in Ansible inventory/hosts, covering every major approach—including their best use cases and clear examples for each. Complete…

Below is a simple dynamic inventory Bash script for Ansible that queries all EC2 instances in your AWS account, gets their public IPs, and outputs a valid Ansible inventory.You just…

How to download? Here’s a detailed and up-to-date conclusion for installing the latest Ansible Automation Platform (AAP) 2.5+ with the RPM/bundle installer—including the minimum requirements and what’s possible (and not)…

Here is a very detailed and comprehensive tutorial on using Ansible Vault with practical, real-world examples for each subcommand. Ansible Vault Tutorial Ansible Vault is a powerful feature that allows…

Here’s a comprehensive, practical, and easy-to-follow tutorial on all main types of Kubernetes Ingress rules—with detailed explanations, diagrams, and YAML examples for each. This guide is aimed at both beginners…

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…

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…

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…

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…

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…

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…

1. ansible Run a single task (module) against hosts in your inventory. For quick, ad-hoc commands. General Syntax Common Examples and All Key Combinations Example Description ansible all -m ping…

Here’s a step-by-step practical guide to using the JFrog Artifactory 7.x REST API to manage your instance (create repos, users, etc.) using your server and credentials. 🟢 Artifactory 7.x REST…