Requirements are identified as either MUST, MUST NOT, SHOULD, SHOULD NOT, or MAY as defined in RFC 2119.
Requirements should be targeted to a restricted set of nouns related to VNFs and within the control of the VNF provider. The current list of VNF Requirement targets is:
- The VNF
- The VNFC
- The VNF Provider
- The VNF Heat Orchestration Template
- The VNF Package
Chapter 4 contains the xNF requirements involving the design and development of xNFs. These requirements help VNFs/PNFs operate efficiently within a cloud environment. Requirements cover design, resiliency, security, modularity and DevOps.
Chapter 5 describes the different data models the xNF provider needs to understand. There are currently 2 models described in this document:
- The first model is the onboarding package data model. This is a TOSCA model that will describe how all the elements passed from the VNF/PNF Provider to the Service provider should be formatted and packaged.
- The second model is HEAT template used for orchestrating and instantiating virtual resources in an OpenStack environment. At this time the HEAT files will be passed to the Service provider as a data element within the TOSCA onboarding package.
Chapter 6 details the requirements specific to an implementation. The current implementations documented are OpenStack and Azure.
Chapter 7 provides the comprehensive set of requirements for xNFs to be on-boarded, configured and managed by ONAP.
Chapter 8 is the appendix that provide a number of detailed data record formats. It also contains a list of the requirements that are listed in the other chapters as well as examples and models that are referenced throughout the rest of the chapters.