VirtFusion Direct Provisioning Module for WHMCS

A comprehensive WHMCS provisioning module for VirtFusion that enables automated VPS server provisioning, management, and client self-service directly from WHMCS.

Table of Contents

• Requirements
• Features
• Installation
• Upgrading
• Configuration
  • Server Setup
  • Product Setup
  • Custom Fields
  • Module Configuration Options
  • Configurable Options (Dynamic Pricing)
  • Custom Option Name Mapping
• Client Area Features
• Admin Area Features
• Theme Compatibility
• API Endpoints Used
• Usage Update (Cron)
• Troubleshooting
• Known Issues
• Security
• Contributing
• License

Requirements

Requirement	Minimum Version	Notes
VirtFusion	v1.7.3+	v6.1.0+ required for VNC console
WHMCS	8.x+	Tested with 8.0 through 8.10
PHP	8.0+	With cURL extension enabled
SSL	Valid certificate	Required on VirtFusion panel

You also need a VirtFusion API token with the following permissions:

• Server management (create, read, update, delete, power, build)
• User management (create, read, reset password, authentication tokens)
• Package and template read access
• Network management (if using IP management features)

Features

Server Provisioning

• Automatic server creation with VirtFusion user account linking
• Server suspension, unsuspension, and termination
• Package/plan upgrades and downgrades
• Configurable options mapping for dynamic resource allocation (CPU, RAM, disk, bandwidth, network speed)
• Dry run validation - Test server creation parameters before provisioning
• Automatic memory unit conversion (GB to MB for values < 1024)

Client Area - Server Management

• Server Overview - Real-time server info (hostname, IPs, resources) with status badge
• Power Management - Start, restart, graceful shutdown, and force power off
• Control Panel SSO - One-click login to VirtFusion panel
• Server Rebuild - Reinstall with any available OS template
• Password Reset - Reset VirtFusion panel login credentials
• Network Management - View and remove IPv4 addresses; view IPv6 subnets
• Resources Panel - Current memory, CPU, storage, traffic allocation with usage bars
• VNC Console - Browser-based console access (panel auto-hides when VNC is disabled on the server)
• Self-Service Billing - Credit balance display, usage breakdown, and credit top-up (when enabled)
• Bandwidth Usage - Traffic usage display with allocation limits
• Billing Overview - Product, billing cycle, dates, and payment information

Admin Area

• Test Connection - Verify API connectivity from WHMCS
• Server Data Display - Live server information from VirtFusion
• Admin Impersonation - Log into VirtFusion panel as server owner
• Server ID Management - Editable Server ID for manual adjustments
• Server Object Viewer - Full JSON response from VirtFusion API
• Validate Server Config - Dry run server creation to check configuration
• Update Server Object - Refresh cached server data from VirtFusion

Ordering Process

• Dynamic OS template dropdown populated from VirtFusion API
• SSH key selection dropdown for users with saved keys, with option to paste a new public key
• SSH Ed25519 key generator — Client-side keypair generation using Web Crypto API
• Checkout validation ensuring OS selection before order placement
• Resource sliders - Configurable option dropdowns are replaced with interactive range sliders
• Compatible with all WHMCS order form templates

Usage Tracking

• Automated bandwidth sync - WHMCS daily cron pulls traffic usage from VirtFusion
• Disk usage sync - Storage usage updated automatically
• Visible in WHMCS client area and admin product details

Backup Management

• Assign backup plans to servers via the VirtFusion API
• Remove backup plans from servers

Resource Modification

• In-place modification of server resources (memory, CPU cores, traffic)
• No server rebuild required for resource changes
• Package change now also applies individual resource modifications from configurable options

Self-Service Billing

• Credit balance display and top-up from client area
• Usage breakdown reporting
• Auto top-off via WHMCS cron when credit falls below threshold
• Self-service mode configurable per product (Hourly, Resource Packs, or Both)

Installation

Step 1: Download & Install

Download the latest release from the releases page, or install directly via the command line:

cd /tmp
git clone https://github.com/EZSCALE/virtfusion-whmcs-module.git
rsync -ahP --delete /tmp/virtfusion-whmcs-module/modules/servers/VirtFusionDirect/ /path/to/whmcs/modules/servers/VirtFusionDirect/
rm -rf /tmp/virtfusion-whmcs-module

Replace /path/to/whmcs with your actual WHMCS installation root.

The resulting file structure should be:

modules/servers/VirtFusionDirect/
  VirtFusionDirect.php       # Main module file
  client.php                 # Client AJAX API
  admin.php                  # Admin AJAX API
  hooks.php                  # WHMCS hooks
  modify.sql                 # Custom field setup SQL
  lib/
    Module.php               # Core module class
    ModuleFunctions.php      # Provisioning functions
    ConfigureService.php     # OS/SSH config service
    Database.php             # Database operations
    Curl.php                 # HTTP client
    ServerResource.php       # Data transformer
    AdminHTML.php            # Admin interface HTML
    Log.php                  # Logging
  templates/
    overview.tpl             # Client area template
    error.tpl                # Error template
    css/module.css           # Styles
    js/module.js             # Client JavaScript
    js/keygen.js             # SSH Ed25519 key generator
  config/
    ConfigOptionMapping-example.php  # Config mapping example

Step 2: Set Up Server in WHMCS

1. Go to Configuration > System Settings > Servers
2. Click Add New Server
3. Fill in:
   • Name: Anything descriptive (e.g., "VirtFusion Production")
   • Hostname: Your VirtFusion panel hostname (e.g., cp.example.com)
   • Type: VirtFusion Direct Provisioning
   • Password/Access Hash: Your VirtFusion API token
4. Click Test Connection to verify
5. Click Save Changes

Step 3: Create Product

1. Go to Configuration > System Settings > Products/Services
2. Create a new product or edit an existing one
3. On the Module Settings tab:
   • Set Module Name to "VirtFusion Direct Provisioning"
   • Select your VirtFusion server
   • Set Hypervisor Group ID, Package ID, and Default IPv4 count
4. Save the product

Step 4: Set Up Custom Fields

See Custom Fields section below.

Step 5: Activate Hooks

The hooks file (hooks.php) is automatically detected by WHMCS when the module is active. If you add the module files to an existing installation, you may need to re-save the product settings or clear the WHMCS template cache for hooks to take effect.

Upgrading

1. Back up your existing modules/servers/VirtFusionDirect/ directory
2. Back up config/ConfigOptionMapping.php if you have a custom mapping
3. Download and deploy the new version:

cd /tmp
git clone https://github.com/EZSCALE/virtfusion-whmcs-module.git
rsync -ahP --delete /tmp/virtfusion-whmcs-module/modules/servers/VirtFusionDirect/ /path/to/whmcs/modules/servers/VirtFusionDirect/
rm -rf /tmp/virtfusion-whmcs-module

4. Restore your custom config/ConfigOptionMapping.php if applicable
5. If you have theme-overridden templates, review them for any new template variables
6. Clear the WHMCS template cache: Configuration > System Settings > General Settings > clear template cache

The module database table (mod_virtfusion_direct) is automatically migrated on first load.

Configuration

Server Setup

In WHMCS Admin under Configuration > System Settings > Servers:

Field	Value
Hostname	Your VirtFusion panel domain (e.g., cp.example.com)
Password	Your VirtFusion API token
Type	VirtFusion Direct Provisioning

Important: Do not include https:// or /api/v1 in the hostname. The module constructs the full URL automatically.

Product Setup

Each WHMCS product using this module needs:

1. Module set to "VirtFusion Direct Provisioning"
2. A linked server (or the module will use any available VirtFusion server)
3. The three configuration options set (Hypervisor Group ID, Package ID, Default IPv4)
4. Custom fields created (see below)

Custom Fields

You must create two custom fields on each product that uses this module:

Field Name	Field Type	Show on Order Form	Admin Only	Required
Initial Operating System	Text Box	Yes	No	No
Initial SSH Key	Text Box	Yes	No	No

These fields are hidden text boxes that are dynamically replaced by dropdown selects via JavaScript hooks on the order form.

Automated setup: Run the SQL from modify.sql to auto-create these fields for all VirtFusion products:

mysql -u whmcs_user -p whmcs_database < modules/servers/VirtFusionDirect/modify.sql

Module Configuration Options

Each product has three module-specific settings:

Option	Name	Description	Default
Config Option 1	Hypervisor Group ID	VirtFusion hypervisor group for server placement	1
Config Option 2	Package ID	VirtFusion package defining server resources	1
Config Option 3	Default IPv4	Number of IPv4 addresses to assign (0-10)	1
Config Option 4	Self-Service Mode	Enable VirtFusion self-service billing (0=Disabled, 1=Hourly, 2=Resource Packs, 3=Both)	0
Config Option 5	Auto Top-Off Threshold	Credit balance below which auto top-off triggers during cron (0=disabled)	0
Config Option 6	Auto Top-Off Amount	Credit amount to add when auto top-off triggers	100

You can find your Hypervisor Group IDs and Package IDs in the VirtFusion admin panel.

Configurable Options (Dynamic Pricing)

To allow customers to select different resource levels with pricing tiers, create WHMCS Configurable Options groups with these option names:

VirtFusion Parameter	Default Option Name	Description	Unit
packageId	Package	VirtFusion package ID	ID
hypervisorId	Location	Hypervisor group for placement	ID
ipv4	IPv4	Number of IPv4 addresses	Count
storage	Storage	Disk space	GB
memory	Memory	RAM (values < 1024 auto-converted from GB)	MB
traffic	Bandwidth	Monthly traffic allowance	GB
cpuCores	CPU Cores	Number of CPU cores	Count
networkSpeedInbound	Inbound Network Speed	Inbound speed	Mbps
networkSpeedOutbound	Outbound Network Speed	Outbound speed	Mbps
networkProfile	Network Type	VirtFusion network profile	ID
storageProfile	Storage Type	VirtFusion storage profile	ID

Custom Option Name Mapping

If your configurable option names differ from the defaults above:

1. Copy config/ConfigOptionMapping-example.php to config/ConfigOptionMapping.php
2. Edit the mapping array:

return [
    'memory' => 'RAM',           // Your option name for memory
    'cpuCores' => 'vCPU Count',  // Your option name for CPU
    'traffic' => 'Data Transfer', // Your option name for bandwidth
    // ... add only the options that differ from defaults
];

Client Area Features

Server Overview

Displays real-time server information fetched from VirtFusion:

• Server name and hostname
• Memory, CPU cores, storage allocation
• IPv4 and IPv6 addresses
• Traffic usage vs. allocation
• Server status badge (Active, Suspended, etc.)

Power Management

Four power control buttons:

• Start - Boot the server
• Restart - Graceful restart
• Shutdown - Graceful ACPI shutdown
• Force Off - Immediate power cut (use with caution)

Network Management

• View all IPv4 addresses and IPv6 subnets assigned to the server
• Remove secondary IPv4 addresses (primary cannot be removed)

VNC Console

• Opens a browser-based VNC console to the server
• Requires VirtFusion v6.1.0+ and the server must be running
• Opens in a new browser window/tab

Server Rebuild

• Select from available OS templates (filtered by server package)
• Includes a confirmation dialog warning about data loss
• Triggers email notification on completion

Control Panel SSO

• One-click login to the VirtFusion panel
• Opens in a new window (with fallback to same-window navigation)
• Password reset option for direct VirtFusion panel access

Billing Overview

• Product name and group
• Recurring amount and billing cycle
• Registration and next due dates
• Payment method

Admin Area Features

Admin Services Tab

When viewing a service in WHMCS admin, the module adds:

• Server ID - Editable field showing the VirtFusion server ID
• Server Info - Button to load live data from VirtFusion API
• Server Object - Full JSON response viewer
• Options - Admin impersonation link

Module Commands (Admin Buttons)

• Create - Provision a new server
• Suspend / Unsuspend - Manage server suspension
• Terminate - Delete the server (with 5-minute grace period in VirtFusion)
• Change Package - Update server to a different VirtFusion package
• Update Server Object - Refresh cached data from VirtFusion
• Validate Server Config - Dry run server creation to test configuration

Theme Compatibility

This module is designed to work with all WHMCS themes:

Theme	Status	Notes
Six (default)	Fully compatible	Bootstrap 3
Twenty-One	Fully compatible	Bootstrap 4
Lagom (ModulesGarden)	Fully compatible	Bootstrap 5
Custom themes	Compatible	Uses dual CSS classes

How Theme Compatibility Works

The module uses dual CSS class names that work across Bootstrap versions:

• panel card - Works in BS3 (panel) and BS4/BS5 (card)
• panel-heading card-header - Works in BS3 and BS4/BS5
• panel-body card-body - Works in BS3 and BS4/BS5
• panel-title card-title - Works in BS3 and BS4/BS5

The order form hooks use vanilla JavaScript (no jQuery dependency) for maximum compatibility.

Theme Override

To customize templates for a specific theme:

/templates/yourthemename/modules/servers/VirtFusionDirect/
  overview.tpl    # Client area template
  error.tpl       # Error template

WHMCS automatically loads theme-specific templates when they exist. Copy the originals from modules/servers/VirtFusionDirect/templates/ as a starting point.

API Endpoints Used

Core Provisioning

Method	Endpoint	Purpose
GET	/connect	Connection testing
GET/POST	/users	User lookup and creation
GET	/users/{id}/byExtRelation	Find VirtFusion user by WHMCS ID
POST	/servers	Server creation
POST	/servers?dryRun=true	Dry run validation
POST	/servers/{id}/build	OS installation / rebuild
GET	/servers/{id}	Server details (also used by UsageUpdate)
DELETE	/servers/{id}	Server termination
POST	/servers/{id}/suspend	Server suspension
POST	/servers/{id}/unsuspend	Server unsuspension
PUT	/servers/{id}/package/{pkgId}	Package changes

Client Management

Method	Endpoint	Purpose
POST	/servers/{id}/power/{action}	Power management
PATCH	/servers/{id}/name	Server renaming
POST	/users/{id}/serverAuthenticationTokens/{serverId}	SSO token
POST	/users/{id}/byExtRelation/resetPassword	Password reset
GET	/media/templates/fromServerPackageSpec/{id}	OS templates
GET	/ssh_keys/user/{id}	SSH key listing

Network

Method	Endpoint	Purpose
DELETE	/servers/{id}/ipv4	Remove IPv4 address

SSH Keys

Method	Endpoint	Purpose
POST	/ssh_keys	Create SSH key for a user (checkout key paste)

Self-Service Billing

Method	Endpoint	Purpose
GET	/selfService/usage/byUserExtRelationId/{id}	Usage data by WHMCS client ID
GET	/selfService/report/byUserExtRelationId/{id}	Billing report by WHMCS client ID
POST	/selfService/credit/byUserExtRelationId/{id}	Add credit by WHMCS client ID
GET	/selfService/currencies	Available self-service currencies

Advanced

Method	Endpoint	Purpose
GET	/servers/{id}/vnc	VNC console (v6.1.0+)
PUT	/servers/{id}/modify/memory	Modify memory (v6.2.0+)
PUT	/servers/{id}/modify/cpuCores	Modify CPU cores (v6.2.0+)
PUT	/servers/{id}/modify/traffic	Modify traffic (v6.0.0+)
POST/DELETE	/servers/{id}/backup/plan	Backup plan management (v4.3.0+)

Usage Update (Cron)

The module implements the UsageUpdate function that is called by the WHMCS daily cron. It automatically syncs:

• Disk usage (used and limit) from VirtFusion to WHMCS tblhosting
• Bandwidth usage (used and limit) from VirtFusion to WHMCS tblhosting

This data appears in the WHMCS client area and admin product details.

Requirements: The WHMCS cron must be running (php -q /path/to/whmcs/crons/cron.php). No additional configuration is needed - the module registers itself automatically.

How it works:

1. WHMCS calls VirtFusionDirect_UsageUpdate() once per configured server
2. The module queries all Active services assigned to that server
3. For each service, it fetches server data from VirtFusion API
4. Disk and bandwidth usage/limits are written to tblhosting

Data format conversion:

• VirtFusion traffic: bytes -> WHMCS expects: MB
• VirtFusion storage: bytes -> WHMCS expects: MB
• VirtFusion storage limit: GB -> WHMCS expects: MB
• VirtFusion traffic limit: GB -> WHMCS expects: MB (0 = unlimited)

Troubleshooting

Connection Test Fails

Symptom	Cause	Solution
"Authentication failed"	Invalid or expired API token	Generate a new token in VirtFusion
"Connection failed"	Hostname unreachable or SSL issue	Verify hostname, check SSL cert validity
"Unexpected response"	API version mismatch or server issue	Check VirtFusion is running, verify API version

Server Creation Fails

Symptom	Cause	Solution
"Service already exists"	Duplicate provisioning attempt	Run termination first, then create
"No Control server found"	No VirtFusion server in WHMCS	Add server in System Settings > Servers
"Unable to create user"	API permission issue	Check token has user create permission
"Server creation failed"	Invalid config options	Use "Validate Server Config" button to diagnose
HTTP 423 response	Server is locked	Wait and retry, or check VirtFusion for lock reason

OS Templates Not Showing on Order Form

1. Verify the Package ID (Config Option 2) is correct
2. Check that the package has OS templates assigned in VirtFusion
3. Ensure the "Initial Operating System" custom field exists (exact name match required)
4. Check that hooks are loading: re-save product settings to trigger hook detection
5. Inspect browser console for JavaScript errors

Client Area Shows Error Template

1. Ensure a VirtFusion server is configured and linked to the product
2. Check the service status is Active or Suspended (not Pending/Terminated)
3. Review Utilities > Logs > Module Log for API errors
4. Verify the mod_virtfusion_direct table has an entry for the service

SSO / Control Panel Login Fails

1. VirtFusion panel must be accessible from the client's browser
2. Verify the VirtFusion user exists (check by external relation ID in VirtFusion admin)
3. Ensure authentication token generation is enabled on the API token
4. Check for popup blockers if the new window doesn't open

VNC Console Not Working

1. Requires VirtFusion v6.1.0 or higher
2. The server must be powered on and running
3. Check that VNC is enabled for the hypervisor in VirtFusion
4. Popup blockers may prevent the console window from opening

UsageUpdate Not Syncing

1. Verify the WHMCS cron is running: php -q /path/to/whmcs/crons/cron.php
2. Check Utilities > Logs > Module Log for UsageUpdate errors
3. Ensure services are in "Active" status (other statuses are skipped)
4. The cron runs daily; wait for the next cycle after initial setup

Known Issues

1. VNC Console - Requires VirtFusion v6.1.0+. Earlier versions do not expose a VNC API endpoint. The module gracefully handles this by showing an error message.

2. Resource Modification - Memory and CPU modification requires VirtFusion v6.2.0+. Traffic modification requires v6.0.0+. Backup management requires v4.3.0+.

3. IPv6 Display - IPv6 subnet display depends on the VirtFusion installation having IPv6 pools configured. If no IPv6 is assigned, the network panel shows "No IPv6 subnets".

4. Order Form Custom Fields - The custom fields ("Initial Operating System" and "Initial SSH Key") must be named exactly as specified. The module matches by field name with spaces removed and converted to lowercase.

5. Hooks File Detection - WHMCS detects the hooks.php file when the module is first activated. If you add the module files to an already-active installation, you may need to deactivate and reactivate the module, or re-save the product settings.

6. Bootstrap 3 Themes - While the module supports BS3 themes, some visual differences may exist (e.g., d-flex not available in BS3). The module uses display: flex in CSS as a fallback.

7. Concurrent API Calls - The module makes individual API calls for each feature panel on the client area page. If the VirtFusion API is slow, the page may take longer to fully load. All panels load asynchronously to minimize perceived delay.

8. Primary IPv4 Protection - The first IPv4 address cannot be removed through the client area interface. This is by design to prevent users from accidentally removing their primary IP address.

9. Self-Signed SSL Certificates - SSL verification is enforced by default. VirtFusion panels using self-signed certificates will cause connection failures. Use a valid SSL certificate (e.g., Let's Encrypt) on your VirtFusion panel.

Security

Architecture

• All client API endpoints validate service ownership before processing
• Admin endpoints require WHMCS admin authentication
• Input sanitization on all user-supplied parameters (type casting, regex filtering, filter_var)
• Proper HTTP status codes (401, 403, 400, 500) for error responses
• XSS prevention via htmlspecialchars(), encodeURIComponent(), and jQuery .text()

Best Practices

• API Tokens: Store only in the WHMCS server password field (encrypted at rest by WHMCS)
• SSL Verification: Enabled by default. Never disable in production.
• File Access: All PHP files include direct access prevention checks
• Module Updates: Keep updated for security patches
• Permissions: Use the minimum required API token permissions

Reporting Vulnerabilities

If you discover a security vulnerability, please report it responsibly by emailing the maintainers rather than opening a public issue. See SECURITY.md for details.

File Structure

modules/servers/VirtFusionDirect/
  VirtFusionDirect.php        # WHMCS module entry point (MetaData, ConfigOptions, all module functions)
  client.php                  # Client-facing AJAX API (authenticated, ownership-validated)
  admin.php                   # Admin-facing AJAX API (admin authentication required)
  hooks.php                   # WHMCS hooks (order form OS/SSH dropdowns, checkout validation)
  modify.sql                  # SQL for creating custom fields
  lib/
    Module.php                # Base class: API communication, power, network, VNC, rebuild
    ModuleFunctions.php       # Provisioning: create, suspend, unsuspend, terminate, change package
    ConfigureService.php      # Order configuration: OS templates, SSH keys, server build init
    Database.php              # Database operations: custom table, WHMCS table queries
    Curl.php                  # HTTP client: GET, POST, PUT, PATCH, DELETE with SSL verification
    ServerResource.php        # Data transformer: VirtFusion API response -> display format
    AdminHTML.php             # Admin interface: HTML generation for admin services tab
    Log.php                   # Logging: WHMCS module log integration
  templates/
    overview.tpl              # Client area Smarty template (all management panels)
    error.tpl                 # Error display template
    css/module.css            # Module styles (responsive, BS3/4/5 compatible)
    js/module.js              # Client JavaScript (all AJAX interactions)
    js/keygen.js              # SSH Ed25519 key generator (Web Crypto API)
  config/
    ConfigOptionMapping-example.php   # Example custom option name mapping

Contributing

Contributions are welcome! Please:

1. Fork the repository
2. Create a feature branch (git checkout -b feature/your-feature)
3. Commit your changes with clear messages
4. Push to your fork and open a Pull Request

For bug reports, please include:

• WHMCS version
• VirtFusion version
• PHP version
• Steps to reproduce
• Module Log output (Utilities > Logs > Module Log)

License

This project is licensed under the GNU General Public License v3.0 - see the LICENSE.md file for details.

Copyright (c) EZSCALE