VM Feature Planning

Value

To cloud providers:

• Unified VM/container resource pool.
• One single software system to maintain.
• Unified eco-system: runtime interface (extended CRI), network interface (CNI), storage interface(CSI).
• Container/VM colocated scheduling optimization(?)

To cloud users:

• Unified API and tools for VM/Container.
• Enable VM workload paradigm: Jobs, ReplicaSet, StatefulSet(?), Deployment(?)
• MixSet of containers/VM(?)
• Multiple VMs in one pod (?)
• Flexbile VM vertical scaling

Classic Features

• Create and delete VMs
• Start and stop VMs
• Reboot VMs
• VM SSH keypair
• VM CloudInit script
• Snapshot and resume VMs
• VM resize
• Cold migration
• Live migration
• Device support: GPU
• lock/unlock VM configuration
• Flavor management - CRUD of flavors
• Support existing container mechanisms like PodDisruptionBudget, etc
• Design refactoring of VM pod converter (require investigation)

storage:

• block storage as volumes
• Add or remove volumes

networking:

• Basic Nic support(requires some update)
• Multiple Nic support
• Attach or detach Nics
• security groups of VM

monitoring:

• VM status report
• VM liveness and readiness
• VM resource utilization monitoring and report

Integration:

• storage: flex integration with Cinder
• storage: CSI integration with at least one storage type
• networking: integration with Mizar
• image: integration with Glance
• portal: integration with portal
• Re-brand Virtlet?
• Re-brand kubelet and other components(?)

Novel Features

• VM ReplicaSet
• VM StatefulSet -- requires dynamic port creation.
• VM Deployment -- rolling update, etc
• In-place vertical scaling
• KSM-optimized scheduling
• Extra small VMs
• VM/Container mixed optimized scheduling
• Verify if VM-based CRD works