Monitoring Ceph with Prometheus

Monitoring Ceph with Prometheus is a straightforward process due to Ceph's native ability to expose metrics, making it easy for users to track the health and performance of their storage clusters. The article outlines the importance of monitoring key metrics such as ceph_health_status, cluster storage usage, Object Storage Daemon (OSD) operations, Metadata Server (MDS) replicas, and quorum status to ensure system reliability. It also highlights the use of PromQL to create alerts for these metrics, which can be visualized in tools like Grafana or Sysdig Monitor. Additionally, the discussion covers essential metrics for understanding latency, saturation, and traffic within the Ceph cluster, emphasizing the value of the Golden Signals framework for detecting and diagnosing potential issues. The article encourages the use of curated dashboards and alerts available on PromCat.io to simplify the setup process and suggests exploring Sysdig Monitor for enhanced monitoring capabilities.