Functionality comparison of open-source PaaS monitoring systems

Abstract

For Platform-as-a-Service (PaaS) environments characterized by elasticity, multi-tenancy, and layered dependencies, this paper proposes a structured method for selecting a vendor-neutral open-source observability stack. The proposed method is based on an analysis of commercial monitoring solutions and covers five functional categories: metrics monitoring, visualization, log monitoring, distributed tracing, and alert routing/incident response. Selected open-source tools are evaluated using technical and operational criteria, including integration, scalability, high availability, and maintainability, with a 1–5 Mean Opinion Score (MOS)-style rubric. Based on the results, the proposed toolchain consists of Prometheus, Grafana, Loki, Jaeger, and Alertmanager. It can serve as a practical monitoring framework for different PaaS environments.