The final installment of a series on monitoring Hadoop health and performance focuses on setting up detailed monitoring by integrating Datadog with Hadoop, including ZooKeeper. This guide explains how to verify the operational status of Hadoop and ZooKeeper components before installing the Datadog Agent, which collects and reports metrics for visualization and alerting. Detailed instructions are provided for configuring the Agent for various Hadoop components like NameNode, DataNodes, YARN, and ZooKeeper, using template configuration files. Once set up, users can monitor Hadoop's performance through a comprehensive dashboard in Datadog, alongside metrics from other systems, and set automated alerts for potential issues. The article encourages users to try a free trial of Datadog for enhanced visibility and alert capabilities in their data-processing infrastructure, with the source Markdown available on GitHub for further reference.