Pulse/docs/CONFIGURATION.md

Pulse Configuration Guide

Configuration File Structure

Pulse uses three separate configuration files, each with a specific purpose. This separation ensures security, clarity, and proper access control.

File Locations

All configuration files are stored in /etc/pulse/ (or /data/ in Docker containers).

/etc/pulse/
├── .env          # Authentication credentials
├── system.json   # Application settings
└── nodes.enc     # Encrypted node credentials

---

📁 .env - Authentication & Security

Purpose: Contains authentication credentials and security settings ONLY.

Format: Environment variables (KEY=VALUE)

Contents:

# User authentication
PULSE_AUTH_USER='admin'              # Admin username
PULSE_AUTH_PASS='$2a$12$...'        # Bcrypt hashed password (keep quotes!)
API_TOKEN=abc123...                  # API token (plain text, not hashed)

# Security settings
ENABLE_AUDIT_LOG=true                # Enable security audit logging

Important Notes:

• Password hash MUST be in single quotes to prevent shell expansion
• API tokens are stored in plain text (48 hex characters)
• This file should have restricted permissions (600)
• Never commit this file to version control
• ProxmoxVE installations may pre-configure API_TOKEN
• Changes to this file are applied immediately without restart (v4.3.9+)

---

📁 system.json - Application Settings

Purpose: Contains all application behavior settings and configuration.

Format: JSON

Contents:

{
  "pollingInterval": 10,          // Fixed at 10 seconds to match Proxmox update cycle
  "connectionTimeout": 10,        // Seconds before node connection timeout
  "autoUpdateEnabled": false,     // Enable automatic updates
  "updateChannel": "stable",      // Update channel: stable, rc, beta
  "autoUpdateTime": "03:00",      // Time for automatic updates (24hr format)
  "allowedOrigins": "",           // CORS allowed origins (empty = same-origin only)
  "backendPort": 7655,            // Backend API port
  "frontendPort": 7655            // Frontend UI port (same as backend in embedded mode)
}

Important Notes:

• User-editable via Settings UI
• Can be safely backed up without exposing secrets
• Missing file results in defaults being used
• Changes take effect immediately (no restart required)
• API tokens are no longer managed in system.json (moved to .env in v4.3.9+)

---

📁 nodes.enc - Encrypted Node Credentials

Purpose: Stores encrypted credentials for Proxmox VE and PBS nodes.

Format: Encrypted JSON (AES-256-GCM)

Structure (when decrypted):

{
  "pveInstances": [
    {
      "name": "pve-node1",
      "url": "https://192.168.1.10:8006",
      "username": "root@pam",
      "password": "encrypted_password_here",
      "token": "optional_api_token"
    }
  ],
  "pbsInstances": [
    {
      "name": "backup-server",
      "url": "https://192.168.1.20:8007",
      "username": "admin@pbs",
      "password": "encrypted_password_here"
    }
  ]
}

Important Notes:

• Encrypted at rest using system-generated key
• Credentials never exposed in UI (only "•••••" shown)
• Export/import requires authentication
• Automatic re-encryption on each save

---

Environment Variable Priority

For backwards compatibility, some settings can be overridden via environment variables:

1. Authentication variables (from .env) - Always highest priority

   • PULSE_AUTH_USER, PULSE_AUTH_PASS, API_TOKEN

2. Network binding variables - For reverse proxy setups

   • BACKEND_HOST - IP address to bind to (default: 0.0.0.0)
     • Set to 127.0.0.1 or localhost to only listen on localhost (for reverse proxy)
   • FRONTEND_PORT - Port to listen on (default: 7655)

3. System settings (from system.json) - Normal priority

   • If system.json exists, it takes precedence
   • If missing, environment variables are checked

4. Legacy environment variables - Lowest priority (deprecated)

   • POLLING_INTERVAL - Only used if system.json doesn't exist
   • CONNECTION_TIMEOUT - Can override system.json value
   • ALLOWED_ORIGINS - Can override system.json value

---

Security Best Practices

1. File Permissions

   chmod 600 /etc/pulse/.env        # Only readable by owner
   chmod 644 /etc/pulse/system.json # Readable by all, writable by owner
   chmod 600 /etc/pulse/nodes.enc   # Only readable by owner
   

2. Backup Strategy

   • .env - Backup separately and securely (contains auth)
   • system.json - Safe to include in regular backups
   • nodes.enc - Backup with .env (contains encrypted credentials)

3. Version Control

   • NEVER commit .env or nodes.enc
   • system.json can be committed if it doesn't contain sensitive data
   • Use .gitignore to exclude sensitive files