server-health-monitor 1.0.0

Lightweight Linux server health monitor with TUI and email alerts

🖥️ Server Health Monitor (SHM)

A lightweight, production-ready system health monitor for Linux servers. Beautiful terminal UI and email alerts — all from a single pip install.

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✨ Features

• Interactive TUI — Full-screen terminal dashboard (like htop, but for everything)
• Email Alerts — Get notified when CPU, memory, disk, or swap cross thresholds
• Auto-start on Boot — One command to install as a systemd service
• Zero Config — Works out of the box with sensible defaults
• Lightweight — Only psutil, PyYAML, loguru, and pydantic as core dependencies

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📦 Installation

pip install server-health-monitor

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🚀 Quick Start

1. Launch the TUI

monitor

Navigate with 1–6 or Tab to switch between views: Overview, Processes, Disk, Network, Alerts, and Config.

2. Run as Background Daemon

monitor --daemon

Collects metrics, checks thresholds, and sends email alerts — no UI.

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🔧 Configuration

SHM reads from config.yaml in the current directory (or pass --config /path/to/config.yaml).

Default Config

thresholds:
  cpu_percent: 85.0
  memory_percent: 85.0
  disk_percent: 90.0
  swap_percent: 80.0

alerts:
  enabled: true
  cooldown_minutes: 5
  log_file: alerts.jsonl

smtp:
  enabled: false
  host: smtp.gmail.com
  port: 587
  username: ""
  password: ""
  from_addr: [e-mail]
  to_addrs:
    - [e-mail]
  use_tls: true

collection_interval: 5
metrics_log: metrics.jsonl

You can also edit the config directly in the TUI — press 6 to go to the Config tab, use arrow keys to navigate, Enter to edit, and s to save.

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📧 Email Alerts Setup

Gmail (Recommended)

1. Create a Google App Password
   Go to https://myaccount.google.com/apppasswords and generate a 16-character app password.

2. Update your config:

   smtp:
     enabled: true
     host: smtp.gmail.com
     port: 587
     username: "[e-mail]"
     password: "abcd efgh ijkl mnop"    # your app password
     from_addr: "[e-mail]"
     to_addrs:
       - "[e-mail]"
     use_tls: true
   

3. Test it — Set cpu_percent: 1.0 temporarily and run:

   monitor --daemon
   

   You should receive an email within seconds.

Important: The TUI (monitor) is display-only. Email alerts are sent by the daemon (monitor --daemon) or the systemd service.

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🔄 Auto-Start on Boot (systemd)

Install SHM as a system service so the alerting daemon starts automatically on every boot:

sudo monitor --install

This will:

• Copy a default config to /etc/shm/config.yaml
• Register and enable a shm systemd service
• Start the daemon immediately

After Installation

# Edit config (set your SMTP credentials, thresholds, etc.)
sudo nano /etc/shm/config.yaml

# Apply changes
sudo systemctl restart shm

Management Commands

Command	Description
sudo systemctl status shm	Check if daemon is running
sudo systemctl restart shm	Restart after config changes
sudo journalctl -u shm -f	Watch live logs
sudo monitor --uninstall	Remove the service

Note: The systemd service runs independently. You can still use monitor (TUI) at any time for interactive monitoring.

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🎮 TUI Keyboard Reference

Global

Key	Action
1–6 / Tab	Switch view
Shift+Tab	Previous view
?	Show help overlay
q	Quit

Processes View

Key	Action
↑ ↓	Select process
/	Search by name or PID
s	Cycle sort (CPU → MEM → PID → Name)
k	Kill selected process (with confirmation)
Esc	Clear search

Config View

Key	Action
↑ ↓	Navigate fields
Enter	Edit field value
s	Save config to disk

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📊 What Gets Monitored?

Category	Metrics
CPU	Total %, per-core %, load average, temperature (if available)
Memory	Used/total, percentage, available, cached, buffers, swap
Disk	All mounted partitions — used/total/free per mount
Network	RX/TX rates, total bytes, per-interface stats, errors/drops
Processes	PID, name, user, CPU%, MEM%, status — sortable and searchable

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📁 File Structure

After running, SHM creates these files in the working directory:

File	Purpose
config.yaml	Configuration (thresholds, SMTP, intervals)
metrics.jsonl	Timestamped metric snapshots (auto-rotated at 10k lines)
alerts.jsonl	Alert history log
monitor.log	Application log (rotated at 10 MB)

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🔍 Troubleshooting

monitor: command not found

Make sure the package is installed and the Python scripts directory is in your PATH:

pip install server-health-monitor
# If using a venv:
source venv/bin/activate

Not receiving emails

• Ensure you are running the daemon (monitor --daemon) or the systemd service — the TUI alone does not send emails.
• Verify smtp.enabled: true in your config.
• Check that you're using a Google App Password, not your regular password.
• Check logs: sudo journalctl -u shm -f or tail -f monitor.log.

Some metrics are missing

Network connection details and listening ports require elevated privileges:

sudo monitor

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🏗️ Development

# Clone the repo
git clone https://github.com/Jayanth1312/server-health-monitor.git
cd server-health-monitor

# Create a virtual environment
python3 -m venv venv
source venv/bin/activate

# Install in editable mode
pip install -e .

# Run
monitor

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📜 License

MIT License — see LICENSE for details.

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🙏 Credits

Built by Jayanth Paladugu — GitHub

If you find this useful, give it a ⭐ on GitHub!