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Observability & Monitoring through Loki,Promtail (Alloy),Prometheus,Micrometer in Grafana

🔧 What this demo covers

  • End-to-end observability setup using Prometheus + Loki + Grafana
  • Integration of Micrometer with Spring Boot for real-time metrics
  • Log collection using Promtail / Alloy from application containers

📊 Metrics Monitoring (Prometheus)

  • Scraping metrics from /actuator/prometheus endpoint
  • JVM metrics: memory, threads, GC activity
  • HTTP metrics: request count, latency, error rates
  • Custom metrics via Micrometer

📜 Centralized Logging (Loki + Promtail)

  • Aggregates logs from multiple microservices
  • Label-based log filtering (fast & efficient)
  • No heavy indexing → lightweight compared to ELK

📈 Visualization (Grafana Dashboards)

  • Real-time dashboards for metrics & logs
  • Correlate logs with metrics for faster debugging
  • Pre-built + custom dashboards

⚙️ Architecture Flow

  • Spring Boot app → exposes metrics via Micrometer
  • Prometheus → scrapes & stores metrics
  • Promtail/Alloy → collects logs → pushes to Loki
  • Grafana → visualizes everything in one place

🚀 Key Benefits

  • Faster root cause analysis
  • Improved system reliability
  • Better performance monitoring
  • Production-ready observability setup

🔥 Bonus Insights

  • Works great with Docker & microservices
  • Easily extendable with alerting rules in Prometheus
  • Can integrate tracing tools like Tempo/Jaeger

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