Key components and features of Azure Pack included:

1. Self-Service Portal: Azure Pack offered a web-based self-service portal that allowed users to provision and manage virtual machines, websites, databases, and other resources within the private cloud.

2. Virtual Machine Cloud: Users could create and manage virtual machines (VMs) with different operating systems and configurations, similar to the Azure Virtual Machines service.

3. Web Sites: Azure Pack included a web hosting platform that allowed users to deploy and manage websites and web applications, akin to Azure App Service.

4. Database Services: Users could provision and manage database instances, including SQL Server and MySQL, within the private cloud environment.

5. Service Management API: Azure Pack provided an API that allowed automation and integration with external systems, enabling custom development and workflows.

6. Resource Providers: Resource providers in Azure Pack extended its functionality to include additional services like virtual networks, storage, and more, creating a modular and extensible architecture.

7. Usage and Billing: Azure Pack allowed organizations to track resource consumption and generate usage reports, which could be useful for chargeback and showback purposes.

8. Integration with System Center: Azure Pack could be integrated with Microsoft System Center components, such as Virtual Machine Manager (VMM) and Operations Manager (SCOM), to provide a holistic management solution for private cloud environments.

9. Customization and Branding: Organizations could customize the look and feel of the Azure Pack portal to match their branding and user experience requirements.