Grafana Has a Free Observability Platform That Visualizes Everything

#grafana #monitoring #devops #observability

CloudWatch charges per metric. Datadog charges per host. Grafana is free, open source, and connects to 100+ data sources — Prometheus, PostgreSQL, Elasticsearch, ClickHouse, Loki, and more. Build dashboards for anything.

What Grafana Gives You for Free

100+ data sources — Prometheus, PostgreSQL, MySQL, InfluxDB, Elasticsearch
Beautiful dashboards — drag-and-drop panel editor
Alerting — Slack, PagerDuty, email, webhook notifications
Explore mode — ad-hoc querying and debugging
Annotations — mark deployments, incidents on graphs
Plugins — 1000+ community plugins
Grafana Cloud — free tier: 10K metrics, 50GB logs, 50GB traces

Quick Start

docker run -d -p 3000:3000 grafana/grafana-oss

Open http://localhost:3000 (admin/admin).

Connect to Prometheus

Go to Configuration → Data Sources → Add Prometheus
URL: http://prometheus:9090
Click "Save & Test"

Build a Dashboard

# CPU usage per container
rate(container_cpu_usage_seconds_total[5m]) * 100

# Memory usage
container_memory_usage_bytes / 1024 / 1024

# HTTP request rate
rate(http_requests_total[1m])

# Error rate
rate(http_requests_total{status=~"5.."}[5m]) / rate(http_requests_total[5m]) * 100

# P99 latency
histogram_quantile(0.99, rate(http_request_duration_seconds_bucket[5m]))

Alerting

# Alert when error rate > 5%
alert: HighErrorRate
expr: rate(http_requests_total{status=~"5.."}[5m]) / rate(http_requests_total[5m]) > 0.05
for: 5m
labels:
  severity: critical
annotations:
  summary: "High error rate detected ({{ $value | humanizePercentage }})"

Full Observability Stack (Docker Compose)

services:
  grafana:
    image: grafana/grafana-oss
    ports: ["3000:3000"]
    volumes: [grafana_data:/var/lib/grafana]

  prometheus:
    image: prom/prometheus
    ports: ["9090:9090"]
    volumes: [./prometheus.yml:/etc/prometheus/prometheus.yml]

  loki:  # Logs
    image: grafana/loki
    ports: ["3100:3100"]

  tempo:  # Traces
    image: grafana/tempo
    ports: ["3200:3200"]

Metrics (Prometheus) + Logs (Loki) + Traces (Tempo) + Dashboards (Grafana) = complete observability.

Grafana vs Datadog vs CloudWatch vs New Relic

Feature	Grafana (OSS)	Datadog	CloudWatch	New Relic
Price	Free	$15/host/mo	Pay per metric	Free tier
Self-hosted	Yes	No	No	No
Data sources	100+	Limited	AWS only	Limited
Custom dashboards	Unlimited	Yes	Limited	Yes
Alerting	Built-in	Built-in	Built-in	Built-in
Community	Huge	Corporate	AWS docs	Corporate

The Verdict

Grafana is the universal dashboard for your infrastructure. Free, open source, connects to everything, and builds dashboards that make CloudWatch look primitive. If you monitor anything, Grafana should be your visualization layer.

Need help building production web scrapers or data pipelines? I build custom solutions. Reach out: spinov001@gmail.com

Check out my awesome-web-scraping collection — 400+ tools for extracting web data.

DEV Community