Website: prometheus.io
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Prometheus is an open-source monitoring and alerting system. It was originally developed at SoundCloud and has since become a standalone open-source project with a large and active community. The project is maintained independently of any single company, and it joined the Cloud Native Computing Foundation (CNCF) in 2016. Key Features: 1. Multi-Dimensional Data Model: Prometheus uses a highly dimensional data model, where time series data is identified by metric name and key-value pairs. 2. PromQL: It has a flexible query language called PromQL, which allows for powerful slicing and dicing of collected time series data. 3. No Reliance on Distributed Storage: Prometheus does not rely on distributed storage, and single server nodes are autonomous. 4. Pull Model for Time Series Collection: Time series data is collected via a pull model over HTTP, and pushing time series is supported via an intermediary gateway. 5. Service Discovery: Targets are discovered via service discovery or static configuration. 6. Graphing and Dashboarding: Prometheus supports multiple modes of graphing and dashboarding, including integration with Grafana. 7. Alerting: It has a precise alerting system based on PromQL, and an Alertmanager handles notifications and silencing. 8. Client Libraries: There are client libraries available for easy instrumentation of services in over ten languages. 9. Integrations: Prometheus has a wide range of existing exporters that allow bridging of third-party data into the system. 10. Open Source and Community-Driven: The project is 100% open source and is maintained by a vibrant community. All components are available under the Apache 2 license on GitHub. Prometheus is designed to be reliable and is suitable for both machine-centric monitoring and monitoring of highly dynamic service-oriented architectures. It is particularly well-suited for microservices environments due to its support for multi-dimensional data collection and querying. It's important to note that while Prometheus is a powerful monitoring tool, it may not be the best choice for use cases that require 100% accuracy, such as per-request billing. In such cases, it's recommended to use other systems for detailed and complete data collection. Overall, Prometheus is a widely used and respected monitoring and alerting system in the DevOps and cloud-native communities. Its open-source nature, active community, and powerful features make it a popular choice for organizations looking to implement robust monitoring solutions."