Vertical scaling of VM instances from OSM

Proposers

• Deepika E (Tata Elxsi)
• Ramesh Ramanathan B (Tata Elxsi)

Description

After launching a VNF instance, we could run into situations where a VNF's existing virtual machines (VM) might require more resources in terms of vCPU, RAM and Storage to cope with increasing demands of the workload/application.

This feature enables OSM to scale-up the VM instances in Openstack VIM on-demand. It involves changing the flavor of the VM instance to a higher flavor from OSM. This feature would be supported as a NS level operation and could be performed on any VM instance of the VNFs in a NS.

Demo or definition of done

If a VM instance, launched as part of a VNF in a NS, requires more resources than already allocated. Then, from OSM, perform vertical-scale operation for the specified VM instance. Verify in VIM that the VM instance is now running with a new higher flavor.