Explore the challenges and solutions in building an IT infrastructure management system for Viettel Group's extensive and diverse infrastructure. Learn how to centralize, maintain consistency, and accurately represent the current status of a complex network comprising physical components like servers and switches, as well as logical components such as MAC, IP, load balancers, storage, and cloud resources. Discover the importance of creating a centralized database for infrastructure information, which serves as a crucial input for reporting, monitoring, auditing, and planning upgrades, repairs, and replacements. Gain insights from the speaker's experiences and lessons learned during the development of Viettel's IT infrastructure information management system (DCIM) using open-source tools like Netbox, Django framework, and Celery.