The text is the first part of a four-part series focused on monitoring OpenStack Nova, an open-source cloud computing platform primarily used for infrastructure-as-a-service. This installment provides a comprehensive overview of Nova, the Compute module of OpenStack, and outlines various metrics crucial for monitoring its operations. It emphasizes the importance of tracking hypervisor metrics for understanding resource utilization and availability, tenant metrics for managing user resources, and Nova server metrics to ensure even distribution of load among compute nodes. The document also highlights the significance of integrating RabbitMQ metrics due to its role in OpenStack's message-passing pipeline and elaborates on the importance of listening to Nova notifications for insights into asynchronous operations. The text suggests that understanding these metrics and events is essential for maintaining the health and performance of an OpenStack deployment, while future installments promise to delve into data collection methods and specific monitoring tools like Datadog.