Prometheus is a popular choice for monitoring containerized microservices and infrastructure, particularly in cloud-native applications, but it has scalability challenges due to its reliance on single-machine operations and local storage. To address these issues, several strategies are available, including federation, which allows one Prometheus server to scrape data from others, and remote storage solutions that offer long-term and scalable data retention. Federation can be hierarchical or cross-service, providing flexibility but also requiring careful management of storage and query capabilities. Remote storage options, such as Cortex and Thanos, integrate with Prometheus to offer highly scalable, long-term data storage and global querying capabilities, although they introduce additional operational overhead. Organizations may also consider outsourced Prometheus monitoring services like Logz.io, which provide scalable infrastructure without the maintenance burden, allowing teams to focus on leveraging metrics for actionable insights.