Explore the fundamentals of Prometheus, an opinionated metrics collection and monitoring system designed for modern workloads like containers and microservices. Learn about its unique design principles and how they apply to dockerized applications from Prometheus co-founder Julius Volz. Discover the system's architecture, data model, query language, and operational simplicity. Gain insights into Prometheus' local storage, service discovery, and Docker metrics. Watch a live demonstration of Prometheus monitoring a Docker Swarm cluster, and understand how this tool can benefit both newcomers and experienced professionals in container monitoring.