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Monitoring

Health Monitoring​

Health Check Endpoints javascript

// Custom health check flow
GET /health/status           // Basic health status
GET /health/metrics          // Performance metrics
GET /health/dependencies     // External dependency status

System Metrics​

javascript


// Memory usage monitoring
const memUsage = process.memoryUsage();
msg.payload = {
    rss: memUsage.rss,
    heapTotal: memUsage.heapTotal,
    heapUsed: memUsage.heapUsed,
    external: memUsage.external
};

Performance Monitoring​

Flow Performance Metrics javascript


// Flow execution time tracking
{
    "flowId": "flow-123",
    "executionTime": 150,
    "nodeCount": 25,
    "messageCount": 1000,
    "timestamp": "2024-01-15T10:30:00Z"
}

Node Performance Monitoring​

javascript


// Node execution statistics
{
    "nodeId": "node-456",
    "type": "function",
    "executionCount": 500,
    "averageExecutionTime": 5.2,
    "errorCount": 2,
    "lastError": "2024-01-15T10:25:00Z"
}

Logging and Alerting​

Structured Logging javascript


// Log message format
{
    "timestamp": "2024-01-15T10:30:00Z",
    "level": "info",
    "msg": "Flow deployed successfully",
    "flowId": "flow-123",
    "nodeCount": 25,
    "userId": "admin"
}

Alert Configuration​

javascript


// Alert thresholds
{
    "memory": {
        "warning": 80,
        "critical": 90
    },
    "cpu": {
        "warning": 70,
        "critical": 85
    },
    "responseTime": {
        "warning": 1000,
        "critical": 5000
    }
}

Monitoring Tools Integration​

Prometheus Integration javascript


// Install Prometheus metrics node
npm install node-red-contrib-prometheus-exporter
// Metrics endpoint
GET /metrics

Grafana Dashboard​

json



{
    "dashboard": {
        "title": "Node-RED Monitoring",
        "panels": [
            {
                "title": "Flow Execution Rate",
                "type": "graph",
                "targets": [
                    {
                        "expr": "rate(node_red_flows_executed_total[5m])"
                    }
                ]
            }
        ]
    }
}