# VPS Threshold Alerting System

Deployed Jul 9, 2026. Monitors all 10 servers for RAM, disk, and CPU usage at 80%, 90%, and 95% thresholds. Alerts via Telegram.

## Script
`/root/.hermes/scripts/vps-threshold-check.sh`

## Cron
`vps-threshold-check` — every 15 min, no_agent, script-only. Silent on success, alerts on threshold crossings.

## What it checks per server
- **Disk:** `df -h / | awk 'NR==2 {print $5}' | tr -d '%'`
- **RAM:** `free | awk '/Mem:/ {printf "%.0f", $3/$2 * 100}'`
- **CPU:** `top -bn1 | awk '/Cpu(s)/ {print $2}'`
- **Core count:** `nproc` (for load average comparison)

## Thresholds
- 80% — warning
- 90% — critical
- 95% — emergency

Each threshold is tracked independently. Re-alerts suppressed for 24 hours. Automatic reset when metric drops below threshold.

## Alert tracking
`/root/.hermes/data/threshold-alerts.json` — format: `{hostname}_{metric}_{threshold}` → ISO timestamp

## Alert format
```
🚨 VPS Alert: ai.itpropartner.com
  ⚠️ DISK at 92% (threshold: 90%)
  ⚠️ RAM at 83% (threshold: 80%)
```

Multiple threshold crossings on one server are combined into a single message.