Grafana Alloy clustering is an advanced OpenTelemetry Collector distribution that enables efficient scraping of nearly 20 million Prometheus metrics through its powerful agentless exporters, which work without requiring users to run applications on their infrastructure. This system, which operates on Grafana Cloud, leverages clustering capabilities to distribute Prometheus scrape jobs across a network of Alloy nodes using a gossip-based protocol, enhancing scalability and high availability. The agentless exporters, specifically designed for Grafana Cloud, facilitate data retrieval from providers like Amazon CloudWatch without local infrastructure setup. The migration from the previous Grafana Agent scraping service to Alloy clustering solved previous complexities related to dual write problems and extra persistence layers by dynamically pulling configuration from remote sources. The transition process involved deploying new Alloy nodes, configuring them with import.http blocks, and incrementally migrating scrape jobs while maintaining resource efficiency comparable to the former system. Overall, Grafana Alloy clustering simplifies and optimizes the scraping of metrics and offers substantial improvements over its predecessor, making it a robust solution for managing large-scale metric ingestion in Grafana Cloud.