Docker Swarm Monitoring: Production Technical Guide
Summary
Consolidates essential practices to monitor Docker Swarm in production, covering cluster architecture, required observability layers, and the minimum viable metrics and alerts. Recommends an open-source stack (Prometheus, cAdvisor, Node Exporter, Grafana, Loki) and explains how to use Prometheus' native Swarm service discovery and global-mode exporters. Advises centralizing logs, defining a small actionable alert set (quorum loss, replica mismatches, frequent restarts, node network loss, Prometheus scrape failures), and operational best practices like retention sizing, securing metric endpoints, and backups. Compares Swarm and Kubernetes on observability trade-offs and recommends deciding to stay or migrate based on operational data, team capability, and scale.
