Instantly Observability

---
name: instantly-observability
description: |
  Set up comprehensive observability for Instantly integrations with metrics, traces, and alerts.
  Use when implementing monitoring for Instantly operations, setting up dashboards,
  or configuring alerting for Instantly integration health.
  Trigger with phrases like "instantly monitoring", "instantly metrics",
  "instantly observability", "monitor instantly", "instantly alerts", "instantly tracing".
allowed-tools: Read, Write, Edit
version: 1.0.0
license: MIT
author: Jeremy Longshore <jeremy@intentsolutions.io>
---

# Instantly Observability

## Overview
Set up comprehensive observability for Instantly integrations.

## Prerequisites
- Prometheus or compatible metrics backend
- OpenTelemetry SDK installed
- Grafana or similar dashboarding tool
- AlertManager configured

## Metrics Collection

### Key Metrics
| Metric | Type | Description |
|--------|------|-------------|
| `instantly_requests_total` | Counter | Total API requests |
| `instantly_request_duration_seconds` | Histogram | Request latency |
| `instantly_errors_total` | Counter | Error count by type |
| `instantly_rate_limit_remaining` | Gauge | Rate limit headroom |

### Prometheus Metrics

```typescript
import { Registry, Counter, Histogram, Gauge } from 'prom-client';

const registry = new Registry();

const requestCounter = new Counter({
  name: 'instantly_requests_total',
  help: 'Total Instantly API requests',
  labelNames: ['method', 'status'],
  registers: [registry],
});

const requestDuration = new Histogram({
  name: 'instantly_request_duration_seconds',
  help: 'Instantly request duration',
  labelNames: ['method'],
  buckets: [0.05, 0.1, 0.25, 0.5, 1, 2.5, 5],
  registers: [registry],
});

const errorCounter = new Counter({
  name: 'instantly_errors_total',
  help: 'Instantly errors by type',
  labelNames: ['error_type'],
  registers: [registry],
});
```

### Instrumented Client

```typescript
async function instrumentedRequest<T>(
  method: string,
  operation: () => Promise<T>
): Promise<T> {
  const timer = requestDuration.startTimer({ method });

  try {
    const result = await operation();
    requestCounter.inc({ method, status: 'success' });
    return result;
  } catch (error: any) {
    requestCounter.inc({ method, status: 'error' });
    errorCounter.inc({ error_type: error.code || 'unknown' });
    throw error;
  } finally {
    timer();
  }
}
```

## Distributed Tracing

### OpenTelemetry Setup

```typescript
import { trace, SpanStatusCode } from '@opentelemetry/api';

const tracer = trace.getTracer('instantly-client');

async function tracedInstantlyCall<T>(
  operationName: string,
  operation: () => Promise<T>
): Promise<T> {
  return tracer.startActiveSpan(`instantly.${operationName}`, async (span) => {
    try {
      const result = await operation();
      span.setStatus({ code: SpanStatusCode.OK });
      return result;
    } catch (error: any) {
      span.setStatus({ code: SpanStatusCode.ERROR, message: error.message });
      span.recordException(error);
      throw error;
    } finally {
      span.end();
    }
  });
}
```

## Logging Strategy

### Structured Logging

```typescript
import pino from 'pino';

const logger = pino({
  name: 'instantly',
  level: process.env.LOG_LEVEL || 'info',
});

function logInstantlyOperation(
  operation: string,
  data: Record<string, any>,
  duration: number
) {
  logger.info({
    service: 'instantly',
    operation,
    duration_ms: duration,
    ...data,
  });
}
```

## Alert Configuration

### Prometheus AlertManager Rules

```yaml
# instantly_alerts.yaml
groups:
  - name: instantly_alerts
    rules:
      - alert: InstantlyHighErrorRate
        expr: |
          rate(instantly_errors_total[5m]) /
          rate(instantly_requests_total[5m]) > 0.05
        for: 5m
        labels:
          severity: warning
        annotations:
          summary: "Instantly error rate > 5%"

      - alert: InstantlyHighLatency
        expr: |
          histogram_quantile(0.95,
            rate(instantly_request_duration_seconds_bucket[5m])
          ) > 2
        for: 5m
        labels:
          severity: warning
        annotations:
          summary: "Instantly P95 latency > 2s"

      - alert: InstantlyDown
        expr: up{job="instantly"} == 0
        for: 1m
        labels:
          severity: critical
        annotations:
          summary: "Instantly integration is down"
```

## Dashboard

### Grafana Panel Queries

```json
{
  "panels": [
    {
      "title": "Instantly Request Rate",
      "targets": [{
        "expr": "rate(instantly_requests_total[5m])"
      }]
    },
    {
      "title": "Instantly Latency P50/P95/P99",
      "targets": [{
        "expr": "histogram_quantile(0.5, rate(instantly_request_duration_seconds_bucket[5m]))"
      }]
    }
  ]
}
```

## Instructions

### Step 1: Set Up Metrics Collection
Implement Prometheus counters, histograms, and gauges for key operations.

### Step 2: Add Distributed Tracing
Integrate OpenTelemetry for end-to-end request tracing.

### Step 3: Configure Structured Logging
Set up JSON logging with consistent field names.

### Step 4: Create Alert Rules
Define Prometheus alerting rules for error rates and latency.

## Output
- Metrics collection enabled
- Distributed tracing configured
- Structured logging implemented
- Alert rules deployed

## Error Handling
| Issue | Cause | Solution |
|-------|-------|----------|
| Missing metrics | No instrumentation | Wrap client calls |
| Trace gaps | Missing propagation | Check context headers |
| Alert storms | Wrong thresholds | Tune alert rules |
| High cardinality | Too many labels | Reduce label values |

## Examples

### Quick Metrics Endpoint
```typescript
app.get('/metrics', async (req, res) => {
  res.set('Content-Type', registry.contentType);
  res.send(await registry.metrics());
});
```

## Resources
- [Prometheus Best Practices](https://prometheus.io/docs/practices/naming/)
- [OpenTelemetry Documentation](https://opentelemetry.io/docs/)
- [Instantly Observability Guide](https://docs.instantly.com/observability)

## Next Steps
For incident response, see `instantly-incident-runbook`.