Grafana is an open-source platform for visualization and analysis of metrics, logs, and application data.

What is Grafana?

Grafana is a visualization tool that allows creating interactive dashboards for metrics, logs, and application data, with alerting and analysis capabilities.

Main Features

Visualization

  • Dashboards: Interactive control panels
  • Charts: Multiple visualization types
  • Alerts: Metric-based notifications
  • Templates: Reusable templates

Data Sources

  • Prometheus: Application metrics
  • InfluxDB: Time series database
  • Elasticsearch: Log search and analysis
  • MySQL/PostgreSQL: Relational databases
  • CloudWatch: AWS metrics

Dashboard Configuration

Metrics Panel

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{
  "title": "CPU Usage",
  "type": "stat",
  "targets": [
    {
      "expr": "avg(cpu_usage_percent)",
      "refId": "A"
    }
  ]
}

Charts Panel

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{
  "title": "HTTP Requests",
  "type": "graph",
  "targets": [
    {
      "expr": "rate(http_requests_total[5m])",
      "refId": "A"
    }
  ]
}

Alerts

Alert Configuration

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{
  "alert": {
    "name": "High CPU Usage",
    "message": "CPU usage is above 80%",
    "frequency": "10s",
    "conditions": [
      {
        "evaluator": {
          "params": [80],
          "type": "gt"
        },
        "query": {
          "params": ["A", "5m", "now"]
        }
      }
    ]
  }
}

References