Prometheus
Prometheus is an open-source monitoring and time-series database for collecting metrics, querying with PromQL, and alerting on system and application health.

Prometheus is an open-source systems and service monitoring platform built around a time-series database. It collects metrics from instrumented targets, lets you query them with PromQL, and supports alerting based on rules.
Key Features
- Multi-dimensional time series data model using labels for flexible filtering and aggregation
- PromQL query language for ad-hoc analysis, dashboards, and alert conditions
- Pull-based metric scraping over HTTP with support for static configs and service discovery
- Alert rule evaluation with alert generation (commonly paired with Alertmanager)
- Federation support for hierarchical and cross-environment aggregation
- Remote write/read integrations for long-term storage and interoperability
Use Cases
- Monitoring Kubernetes clusters and cloud-native services via dynamic service discovery
- Application and infrastructure telemetry for SRE/DevOps dashboards and alerting
- Central metrics collection for microservices, batch jobs (via push gateway patterns), and exporters
Limitations and Considerations
- Built-in storage is optimized for a single-node TSDB; long-term retention and global scale typically require external remote storage integrations
Prometheus is a strong fit when you want a reliable, standards-based metrics platform with powerful querying and a broad ecosystem of exporters and integrations. It is widely used for cloud-native monitoring and alert-driven operations.





