System requirements
In this problem we will look at the system design of a Type-1 Hypervisor. A hypervisor, also known as a virtual machine monitor (VMM), is a software or firmware component that creates and manages virtual machines (VMs) on a physical computer. It allows multiple operating systems to run concurrently on a single physical machine, providing isolation between them.
There are two main types of hypervisors:
- Type 1 Hypervisor (Bare-metal Hypervisor): This type of hypervisor runs directly on the physical hardware of the host machine without the need for an underlying operating system. It manages the hardware resources and directly controls the execution of guest operating systems. Examples of Type 1 hypervisors include VMware vSphere/ESXi, Microsoft Hyper-V (when installed on the bare metal), and Xen.
- Type 2 Hypervisor (Hosted Hypervisor): This type of hypervisor runs on top of a conventional operating system, utilizing its resources to create and manage virtual machines. The underlying operating system provides services to the hypervisor and helps manage hardware resources. Examples of Type 2 hypervisors include VMware Workstation, Oracle VirtualBox, and Parallels Desktop.
Functional:
- Virtual Machine Creation and Management:
- Users should be able to create, start, stop, pause, and delete virtual machines.
- Provide options for configuring VM settings such as CPU, memory, and networking.
- Allow for automated provisioning and deployment of virtual machines.
- Resource Allocation:
- Allocate CPU, memory, storage, and network bandwidth to virtual machines based on their requirements.
- Implement resource prioritization and scheduling algorithms to ensure fair and efficient resource utilization.
- Support dynamic resource adjustment to accommodate changing workload demands.
- Isolation:
- Ensure strong isolation between virtual machines to prevent interference and maintain security.
- Enforce memory and CPU isolation to prevent one VM from accessing another VM's resources.
- Implement network isolation to prevent unauthorized communication between VMs.
- Networking:
- Provide virtual network interfaces, switches, and routers for inter-VM communication.
- Support connectivity between virtual machines, host system, and external networks.
- Implement network security measures such as firewalls and VLANs to protect VM traffic.
- Snapshot and Cloning:
- Enable users to take snapshots of virtual machines for backup and disaster recovery purposes.
- Support cloning of virtual machines to create identical copies for scalability or testing purposes.
- Ensure efficient storage management for storing snapshots and clones.
- Monitoring and Management:
- Monitor VM resource usage, performance metrics, and health status.
- Provide administrators with dashboards and reports for monitoring the virtualized environment.
- Support management operations such as live migration, VM migration, and resource scaling.
Non-Functional:
- Performance:
- Ensure minimal overhead for virtualization to maximize performance.
- Optimize resource allocation and scheduling algorithms for low latency and high throughput.
- Support hardware acceleration technologies (e.g., VT-x/AMD-V) for improved performance.
- Scalability:
- Scale the hypervisor system to support a large number of virtual machines and concurrent users.
- Implement distributed management and resource pooling for horizontal scalability.
- Reliability:
- Ensure high availability of virtual machines and the hypervisor system.
- Implement fault tolerance mechanisms to handle hardware failures and VM crashes gracefully.
- Support automated failover and recovery procedures.
- Security:
- Enforce access control and authentication mechanisms to prevent unauthorized access to virtual machines and management interfaces.
- Implement encryption for data in transit and at rest to protect against data breaches.
- Regularly update and patch the hypervisor system to address security vulnerabilities.
- Compatibility:
- Ensure compatibility with a wide range of hardware platforms and guest operating systems.
- Support industry-standard virtualization formats (e.g., VMDK, VHD) for VM images and snapshots.
- Provide APIs and SDKs for integration with third-party management tools and cloud platforms.
- Usability:
- Design intuitive user interfaces for administrators and end-users.
- Provide comprehensive documentation and training materials for system configuration and management.
- Support remote management and monitoring capabilities for easy administration.