Unified monitoring and observability platform for infrastructure, applications, and logs, used for performance monitoring and alerting.
Pricing: 15 USD · Updated 2026-09-03
productivityYes. Datadog offers a free tier with limited monitoring; paid plans start at $15/month (price checked 2026-09-03).
Datadog is a unified monitoring and observability platform for infrastructure, applications and logs, used for performance monitoring and alerting.
Build a complete Node.js + Prometheus + Grafana monitoring stack: instrument Express with prom-client, scrape metrics, run Prometheus in Docker, build Grafana dashboards with PromQL, and configure alerts. Includes a working docker-compose example.
Learn to create a production-ready RESTful API using Node.js and Express: setup, routing, middleware, environment variables, error handling, and deployment best practices — with a practical CRUD example for managing resources.
Docker explained: what containers are, how Docker Engine uses Linux namespaces and cgroups, how images, Dockerfiles, and Docker Compose fit together, and how Docker compares with virtual machines.
Observability is the ability to infer a system's internal state from its external outputs. Learn how the three pillars — logs, metrics, and traces — work together, the difference between monitoring and observability, and the four golden signals (latency, traffic, errors, saturation).
