Telegram Monitor Alert

Telegram Monitor Alert

Send system health alerts (CPU, disk, memory, uptime) to Telegram via cron jobs with no_agent=True.

Watchdog Script Pattern

Create a script that checks system health and outputs a message only when something is wrong:

# scripts/disk-watchdog.sh
#!/bin/bash
THRESHOLD=90
USAGE=$(df / | tail -1 | awk '{print $5}' | sed 's/%//')
if [ "$USAGE" -gt "$THRESHOLD" ]; then
    echo "⚠️  Disk Alert: $USAGE% on /"
fi

Cron Job (Zero Token Cost)

hermes cron create \
  --schedule "*/10 * * * *" \
  --script "scripts/disk-watchdog.sh" \
  --no-agent \
  --deliver telegram

With no_agent=True:

• Script stdout = message body
• Empty stdout = silent (nothing to report)
• Non-zero exit = error alert sent

Python Watchdog

# scripts/system-watchdog.py
import psutil, json, os

alerts = []

# CPU
cpu = psutil.cpu_percent(interval=1)
if cpu > 90:
    alerts.append(f"🔥 CPU: {cpu}%")

# Memory
mem = psutil.virtual_memory()
if mem.percent > 90:
    alerts.append(f"🧠 Memory: {mem.percent}%")

# Disk
for part in psutil.disk_partitions():
    usage = psutil.disk_usage(part.mountpoint)
    if usage.percent > 90:
        alerts.append(f"💾 {part.mountpoint}: {usage.percent}%")

# Print alerts (becomes the message)
for a in alerts:
    print(a)

What to Monitor

Alert Levels