ServMon#

KISS (Keep It Simple, Stupid) server monitoring tool with email alerts.

For those who want to keep it simple instead of using complex setups like Prometheus, Grafana, and Alertmanager.

Features#

CPU & Memory Monitoring - Alert on high usage
Disk Monitoring - Monitor multiple partitions
HTTP Health Checks - Monitor endpoint availability
Journalctl Monitoring - Scan systemd logs for errors
Reboot Detection - Email notification on system reboot
Email Alerts - Rich formatting with severity levels
Smart Cooldowns - Prevent alert spam

Installation#

go install pkg.rbrt.fr/servmon@latest

Configuration#

Edit ~/.servmon.yaml or /etc/servmon/config.yaml:

alert_thresholds:
  cpu:
    threshold: 90
    duration: 5m0s
    cooldown: 30m0s
    check_interval: 10s

  memory:
    threshold: 80
    cooldown: 30m0s
    check_interval: 10s

  disks:
    - path: /
      threshold: 90
      cooldown: 4h0m0s
      check_interval: 1m0s

  http:
    url: http://localhost:8080/health
    timeout: 5s
    sample_rate: 10
    failure_threshold: 20
    check_interval: 1m0s
    cooldown: 15m0s

  journalctl:
    enabled: true
    check_interval: 5m0s
    lookback_period: 5m0s
    error_threshold: 10
    priority: err
    cooldown: 30m0s

  reboot:
    enabled: true
    uptime_threshold: 10m0s

email:
  smtp_server: smtp.gmail.com
  smtp_port: 587
  from: alerts@yourdomain.com
  to: admin@yourdomain.com
  username: alerts@yourdomain.com
  password: your-app-password

Usage#

Run Manually#

servmon --config ~/.servmon.yaml

Systemd Service#

# Start
sudo systemctl start servmon

# Enable auto-start
sudo systemctl enable servmon

# View logs
sudo journalctl -u servmon -f

# Check status
sudo systemctl status servmon

License#

MIT.

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