manage storage resources

[lukas016]

Summary

We can create empty disks which are stored as file on FS. It is same resource as memory, cpu, ... and it is limited by Partion size/capacity, so we need to manage it in resource manager as other resources.

We will need to implement update of storage state in resource manager for these calls:

• Detach volume
• Attach volume
• Create machine
• Delete Machine

Extend resource manager with managing of storage can be complicated because storage can be allocated/deallocated dynamically and synchronization delay between layers can be problematic.
I don't recommend implement this issue in first iteration of Resource manager, but minimally we can think about special edge cases as is allocation of resources for dynamically for living machine (detach/attach iri calls)

Motivation

Better managing of resources and minimize problems with scheduling