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According to above contents, we can see that Multus ensures pod to implement multiple virtual network interface/card and implement multiple network plane for containers at infrastructure level. However, for developers of network functions, they still need to understand the working principles and using methods of different CNIs. The difficulty of network development has not been reduced. Therefore, based on Multus solution, a Telco PaaS function named NMaaS is proposed in this Chapter.
NMaaS, Network Management as a Service, is proposed to expose the service of container multiple network planes. It has the following features:
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Figure 4-7 Proposed NMaaS Diagram (need update)
Figure 4-7 shows the basic working principle of NMaaS. NMaaS pod receives a vNIC request from orchestration/management systems or command line through standard NMaaS NBI. NMaaS will convert vNIC request into contents that can be understand by CaaS layer, including vNIC type, amount, configutation, etc. And the converted information will be sent to Multus to setup required underlaying driver/software. Then, NMaaS will trigger K8S create new vNIC for target Pod, and update the traffic and vNIC configuration in Pod.
4.2.3.5 Telco PaaS Solution Proposed by China Mobile
For telecommunication industry, network functions are designed following a paradigm and in distributed architecture. No matter it is PNF, VNF or CNf, each NF is desgined as multiple modules, which typically includes interfaces module (which is in charge of south-north communication with other NFs), business processing modules (which deals with NF business logics), data storage module (which stores NF data), and operation andf management module (which is in charge of NF operation and management). Within all these functional modules, operation and management module (OAM module), as it has similar functions to different NFs, can be shared as common module, which can be treated as a group of PaaS service.
4.2.4 XGVela PaaS Workflow
After summarizing the technical architecture and functional requirements, XGVela related workflows will be covered in this Chapter. These workflows are applicable to all PaaS platforms, which includes XGVela. In this Chapter, we only cover the simple and general workflows that have no telecom features, while the interaction with NFVO, VNFM and other telecom systems will be considered in future release.
Figure 4-7 8 PaaS Platform Workflow
We simplify the PaaS technical architecture and its relationship with outer management systems as blocks in figure 4-7, which includes NF/application, User, Operator/Management systems, PaaS Service, PaaS Management, and CaaS. The major workflow are listed below.
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