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diff --git a/docs/guides/onap-developer/architecture/blueprint-enr.rst b/docs/guides/onap-developer/architecture/blueprint-enr.rst new file mode 100644 index 000000000..404f7d0df --- /dev/null +++ b/docs/guides/onap-developer/architecture/blueprint-enr.rst @@ -0,0 +1,100 @@ +ONAP Blueprint Enrichment +~~~~~~~~~~~~~~~~~~~~~~~~~ + +The ONAP Beijing release includes four functional enhancements in the +areas of manually triggered scaling, change management, and hardware +platform awareness (HPA). These features required significant community +collaboration as they impact multiple ONAP projects. These features are +applicable to any use case; however, to showcase them in a concrete +manner, they have been incorporated into VoLTE and vCPE blueprints. + +Manually Triggered Scaling +^^^^^^^^^^^^^^^^^^^^^^^^^^ + +Scale-out and scale-in are two primary benefits of NFV. Scaling can be +triggered manually (e.g., by a user or OSS/BSS) or automatically via a +policy-driven closed loop. An automatic trigger allows real-time action +without human intervention, reducing costs and improving customer +experience. A manual trigger, on the other hand, is useful to schedule +capacity in anticipation of events such as holiday shopping. An ideal +scaling operation can scale granularly at a virtual function level (VF), +automate VF configuration tasks and manage the load-balancer that may be +in front of the VF instances. In addition to run-time, this capability +also affects service design, as VNF descriptors need to be granular up +to the VF level. + +The Beijing release provides the initial support for these capabilities. +The community has implemented manually triggered scale-out and scale-in +in combination with a specific VNF manager (sVNFM) and demonstrated this +with the VoLTE blueprint. An operator uses the Usecase UI (UUI) project +to trigger a scaleing operation. UUI communicates with the Service +Orchestrator (SO). SO uses the VF-C controller, which in turn instructs +a vendor-provided sVNFM to implement the scale-out action. + +We have also demonstrated a manual process to Scale Out VNFs that use +the Virtual Infrastructure Deployment (VID), the Service Orchestrator +(SO) and the Application Controller (APPC) as a generic VNF Manager. +Currently, the process is for the operator to trigger the Scale Out +action using VID, which will request SO to spin up a new component of +the VNF. Then SO is building the ConfigScaleOut request and sending to +APPC over DMaaP, where APPC picks it up and executes the configuration +scale out action on the requested VNF. + +Change Management +^^^^^^^^^^^^^^^^^ + +NFV will bring with it an era of continuous, incremental changes instead +of periodic step-function software upgrades, in addition to a constant +stream of both PNF and VNF updates and configuration changes. To +automatically deliver these to existing network services, the ONAP +community is creating framework to implement change management +functionality that is independent of any particular network service or +use case. Ideally, change management provides a consistent interface and +mechanisms to manage complex dependencies, different upgrade mechanisms +(in-place vs. scale-out and replace), A/B testing, conflict checking, +pre- and post-change testing, change scheduling, rollbacks, and traffic +draining, redirection and load-balancing. These capabilities impact both +design-time and run-time environments. + +Over the next several releases, the community will enhance change +management capabilities in ONAP, culminating with a full CI/CD flow. +These capabilities can be applied to any use case; however, specifically +for the Beijing release, the vCPE blueprint has been enriched to execute +a predefined workflow to upgrade the virtual gateway VNF by using +Ansible. An operator invokes an upgrade operation through the VID +interface. VID drives SO, which initiates a sequence of steps such as +VNF lock, pre-check, software upgrade, post-check and unlock. Since +virtual gateway is an L3 VNF, the specific operations are carried out by +the SDN-C controller in terms of running the pre-check, post-check and +upgrade through Ansible playbooks. + +Hardware Platform Awareness (HPA) +^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + +Many VNFs have specific hardware requirements to achieve their +performance and security goals. These hardware requirements may range +from basic requirements such as number of cores, memory size, and +ephemeral disk size to advanced requirements such as CPU policy (e.g. +dedicate, shared), NUMA, hugepages (size and number), accelerated +vSwitch (e.g DPDK), crypto/compression acceleration, SRIOV-NIC, TPM, SGX +and so on. The Beijing release provides three HPA-related capabilities: + +1. Specification of the VNF hardware platform requirements as a set of + policies. + +2. Discovery of hardware and other platform features supported by cloud + regions. + +3. Selection of the right cloud region and NFV infrastructure flavor by + matching VNF HPA requirements with the discovered platform + capabilities. + +While this functionality is independent of any particular use case, in +the Beijing release, the vCPE use case has been enriched with HPA. An +operator can specify engineering rules for performance sensitive VNFs +through a set of policies. During run-time, SO relies on the ONAP +Optimization Framework (OOF) to enforce these policies via a +placement/scheduling decision. OOF determines the right compute node +flavors for the VNF by querying the above-defined policies. Once a +homing decision is conveyed to SO, SO executes the appropriate workflow +via the appropriate controller. |