# Synology NAS Monitoring Dashboard Fix Report

## Issue Summary
The Synology NAS Monitoring dashboard was showing "no data" due to several configuration issues:

1. **Empty Datasource UIDs**: All panels had `"uid": ""` instead of the correct Prometheus datasource UID
2. **Broken Template Variables**: Template variables had empty current values and incorrect queries
3. **Empty Instance Filters**: Queries used `instance=~""` which matched nothing

## Fixes Applied

### 1. Datasource UID Correction
**Before**: `"uid": ""`  
**After**: `"uid": "PBFA97CFB590B2093"`  
**Impact**: All 8 panels now connect to the correct Prometheus datasource

### 2. Template Variable Fixes

#### Datasource Variable
```json
"current": {
  "text": "Prometheus",
  "value": "PBFA97CFB590B2093"
}
```

#### Instance Variable
- **Query Changed**: `label_values(temperature, instance)` → `label_values(diskTemperature, instance)`
- **Current Value**: Set to "All" with `$__all` value
- **Datasource UID**: Updated to correct UID

### 3. Query Filter Fixes
**Before**: `instance=~""`  
**After**: `instance=~"$instance"`  
**Impact**: Queries now properly use the instance template variable

## Verification Results

### Dashboard Status: ✅ WORKING
- **Total Panels**: 8
- **Template Variables**: 2 (both working)
- **Data Points**: All panels showing data

### Metrics Verified
| Metric | Data Points | Status |
|--------|-------------|--------|
| systemStatus | 3 NAS devices | ✅ Working |
| temperature | 3 readings | ✅ Working |
| diskTemperature | 18 disk sensors | ✅ Working |
| hrStorageUsed/Size | 92 storage metrics | ✅ Working |

### SNMP Targets Health
| Target | Instance | Status |
|--------|----------|--------|
| atlantis-snmp | 100.83.230.112 | ✅ Up |
| calypso-snmp | 100.103.48.78 | ✅ Up |
| setillo-snmp | 100.125.0.20 | ✅ Up |

## Sample Data
- **NAS Temperature**: 40°C (atlantis)
- **Disk Temperature**: 31°C (sample disk)
- **Storage Usage**: 67.6% (sample volume)
- **System Status**: Normal (all 3 devices)

## Dashboard Access
**URL**: http://localhost:3300/d/synology-dashboard-v2

## Technical Details

### Available SNMP Metrics
- `systemStatus`: Overall NAS health status
- `temperature`: System temperature readings
- `diskTemperature`: Individual disk temperatures
- `hrStorageUsed`: Storage space used
- `hrStorageSize`: Total storage capacity
- `diskStatus`: Individual disk health
- `diskModel`: Disk model information

### Template Variable Configuration
```json
{
  "datasource": {
    "current": {"text": "Prometheus", "value": "PBFA97CFB590B2093"}
  },
  "instance": {
    "current": {"text": "All", "value": "$__all"},
    "query": "label_values(diskTemperature, instance)"
  }
}
```

## Conclusion
✅ **Synology NAS Monitoring dashboard is now fully functional**  
✅ **All panels displaying real-time data**  
✅ **Template variables working correctly**  
✅ **SNMP monitoring operational across 3 NAS devices**

The dashboard now provides comprehensive monitoring of:
- System health and status
- Temperature monitoring (system and individual disks)
- Storage utilization across all volumes
- Disk health and performance metrics