How to monitor Ceph: the top 5 metrics to watch

The text discusses the importance of monitoring Ceph, a storage infrastructure used in Kubernetes and OpenShift, highlighting the necessity of tracking its performance and health. It delves into using both built-in command-line tools and Sysdig Monitor for effective monitoring. Built-in tools provide basic status checks such as health, OSD node status, and capacity usage, while Sysdig Monitor offers advanced features like historical metrics, auto-discovery, and metadata tagging from various platforms. The article recommends setting up alerts for key metrics, such as health status, monitor node quorum, OSD node participation, storage capacity, and time synchronization to ensure efficient Ceph cluster management. It concludes by suggesting that while built-in tools suffice for smaller, non-critical applications, a more robust system like Sysdig is beneficial for production environments to provide comprehensive monitoring and alerting capabilities.