homelab-optimized/docker/monitoring/synology-dashboard-fix-report.md

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

"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

{
  "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