Monitoring and Logging Essentials

Efficiently monitoring and managing logs is essential for maintaining validator node performance. Here are the main tools and commands for this task:

• System Monitoring:

  • htop – Real-time view of processes, CPU, and memory usage.

  • ps aux – Lists all running processes with details like CPU and memory usage.

  • free -h – Shows memory usage in a human-readable format.

  • df -h – Displays disk usage and available space.

• Log Management:

  • journalctl -u nodename.service – Shows logs for a specific systemd service.

  • tail -f /path/to/logfile – Shows the end of a file and updates in real time, useful for monitoring logs as they are written.

  • logrotate – Used to configure log rotation and prevent log files from using up disk space.

• Log Analysis:

  • grep "keyword" /path/to/logfile – Searches logs for specific keywords.

  • awk '{print $1, $2, $5}' /path/to/logfile – Extracts specific fields from logs for easier analysis.

• Example Health Check Script with Alerts:

  bashCopy code#!/bin/bash
  if ! systemctl is-active --quiet nodename.service; then
      echo "Node down" | mail -s "Node Alert" [e-mail]
  fi