Scaling Use Case Proposal

Scaling Use Cases Beijing Casablanca Scale Out Scale In Manual Scaling (In Progress) Casablanca (Stretch Goal) Manual Scaling Scale In Complexities Must not impact service Drain/Migrate existing traffic Transfer state of old instance May need to create VNF state machine and state transitions (Idle/Active) Automatic Scaling

Casablanca Scaling Features Auto Scale Out – This is the highlight feature for Casablanca and will provide a closed loop response to high demand within a VNF. The primary impacts will be Policy, CLAMP, and APPC Homing and Licensing – When new instances are requested we should do a check to determine placement and license availability. This feature was descoped from Beijing. The primary impacts will be SO, OOF, SDNC, and SDC Controller Type – In Beijing the operator had to manually select the controller type (SDNC or APPC) within VID. The controller type should be part of the VNF model and not a run time option. Stretch Goals Scale In (Auto and Manual) – This feature will complete the scaling capabilities for VNFs, and will require a command to drain and move traffic from an existing instance so that it can be removed from the pool of active instances. More work needs to be done to define the requirements for this feature. Primary impacts should be APPC, SDNC, SO, Policy CLAMP, VID, SDC. TOSCA capabilities – Manual Scale Out in Beijing only allowed scaling of HEAT based VNFs. As the TOSCA model becomes more developed we will need to enable scaling for TOSCA based VNFs.

Auto Scale Out Work Flow VNFC VNFC VNFC APPC SDNC DMaaP SO VID Policy DCAE Telemetry Data Scaling Data Scaling Event Scaling Request Healthcheck Healthcheck Homing, Licensing, Capacity checks Healthcheck Create new instance Existing VNF(C) New VNFC ConfigScaleOut() ConfigScaleOut() Configure new instance Telemetry Data Healthcheck Healthcheck Healthcheck

Homing and License Flow Diagram