ETSI GS NFV-REL 006-2018 Network Functions Virtualisation (NFV) Release 3 Reliability Maintaining Service Availability and Continuity Upon Software Modification (V3 1 1).pdf

1、 ETSI GS NFV-REL 006 V3.1.1 (2018-02) Network Functions Virtualisation (NFV) Release 3; Reliability; Maintaining Service Availability and Continuity Upon Software Modification Disclaimer The present document has been produced and approved by the Network Functions Virtualisation (NFV) ETSI Industry S

2、pecification Group (ISG) and represents the views of those members who participated in this ISG. It does not necessarily represent the views of the entire ETSI membership. GROUP SPECIFICATION ETSI ETSI GS NFV-REL 006 V3.1.1 (2018-02)2 Reference DGS/NFV-REL006 Keywords NFV, reliability, software ETSI

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7、tStaff.aspx Copyright Notification No part may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm except as authorized by written permission of ETSI. The content of the PDF version shall not be modified without the written authorizat

8、ion of ETSI. The copyright and the foregoing restriction extend to reproduction in all media. ETSI 2018. All rights reserved. DECTTM, PLUGTESTSTM, UMTSTMand the ETSI logo are trademarks of ETSI registered for the benefit of its Members. 3GPPTM and LTE are trademarks of ETSI registered for the benefi

9、t of its Members and of the 3GPP Organizational Partners. oneM2M logo is protected for the benefit of its Members. GSM and the GSM logo are trademarks registered and owned by the GSM Association. ETSI ETSI GS NFV-REL 006 V3.1.1 (2018-02)3 Contents Intellectual Property Rights 5g3Foreword . 5g3Modal

10、verbs terminology 5g31 Scope 6g32 References 6g32.1 Normative references . 6g32.2 Informative references 7g33 Definitions and abbreviations . 7g33.1 Definitions 7g33.2 Abbreviations . 8g34 Overview 8g35 NFV Software 9g35.1 Types of NFV Software . 9g35.1.1 Introduction. 9g35.1.2 VNF Domain Software .

11、 10g35.1.3 MANO Domain Software . 10g35.1.4 NFVI Software 11g35.2 Software Modification Implications . 11g36 Software Modification Process 12g36.1 Overview 12g36.2 The Overall Software Modification Process. 12g36.3 Applicability for Software Types . 15g36.3.1 Network Services/VNFs . 15g36.3.1.1 VNF

12、Software Modification Scenarios . 15g36.3.1.2 VNF Software Modification Requirements 16g36.3.2 Management and Orchestration Software Modification Process 17g36.3.2.1 Introduction . 17g36.3.2.2 Addition of Management and Orchestration Component - An Overview . 18g36.3.2.3 Critical Assumptions for Rel

13、iability . 18g36.3.2.4 Requirements 19g36.3.3 NFVI Software 19g36.3.3.1 Introduction . 19g36.3.3.2 Software Modification Precedence . 20g36.3.3.3 Coordination of NFVI Software Modifications 20g36.3.3.4 NFVI Resource Software Modification 21g36.3.3.5 NFVI Software Modification Requirements . 22g36.4

14、Exception Handling of Problems during Software Modification Process 22g36.5 Test Process - High Level Overview 24g36.5.1 Introduction. 24g36.5.2 Pre-deployment Testing for VNFs 25g36.5.3 Pre-deployment Testing for NFVI Elements 26g3Annex A (informative): Analysis of VNF Software Modifications . 28g3

15、A.1 Introduction 28g3A.2 Different VNF design and deployment patterns . 28g3A.3 Use Case 1: Stateless VNF upgrade . 28g3A.4 Use Case 2: Stateful VNF upgrade . 29g3A.4.1 Deployment option 1: Stateful VNF with active-standby redundancy . 29g3A.4.2 Deployment option 2: Simultaneous operation of the old

16、 and new software version instances . 29g3A.4.3 Deployment option 3: Stateful VNF with load sharing 30g3A.4.4 Deployment option 4: Stateful VNF with an internal resiliency mechanism . 31g3ETSI ETSI GS NFV-REL 006 V3.1.1 (2018-02)4 A.5 Use Case 3: VNF software update . 32g3A.6 Use Case 4: NS update w

17、ith simultaneous software upgrade of multiple VNF instances . 33g3A.7 Summary 33g3Annex B (informative): Potential solutions for VNF software modification . 35g3B.1 Introduction 35g3B.2 Alternative Solutions for Supporting VNF Software Modification with Existing LCM Operations . 35g3B.2.1 General .

18、35g3B.2.2 Alternative Method #1 35g3B.2.3 Alternative Method #2 36g3B.2.3.1 General 36g3B.2.3.2 Variant A 36g3B.2.3.3 Variant B . 36g3B.3 Alternative Solutions for Supporting VNF Software Modification with New LCM Operations . 37g3B.3.0 Introduction 37g3B.3.1 Overview of the VNF Instantiation Operat

19、ion . 38g3B.3.2 VNF Software Modification Initiated from the OSS/BSS 38g3B.3.3 VNF Software Modification Initiated from the EM . 43g3Annex C (informative): NFVI Software Modification Flows . 45g3C.1 Exemplary Coordination of NFVI Software Modifications . 45g3C.2 Illustrative Example of NFVI Resource

20、 Software Modification 47g3Annex D (informative): Authors Essential, or potentially Essential, IPRs notified to ETSI in respect of ETSI standards“, which is available from the ETSI Secretariat. Latest updates are available on the ETSI Web server (https:/ipr.etsi.org/). Pursuant to the ETSI IPR Polic

21、y, no investigation, including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become, essential to the present document. Trademarks The pres

22、ent document may include trademarks and/or tradenames which are asserted and/or registered by their owners. ETSI claims no ownership of these except for any which are indicated as being the property of ETSI, and conveys no right to use or reproduce any trademark and/or tradename. Mention of those tr

23、ademarks in the present document does not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks. Foreword This Group Specification (GS) has been produced by ETSI Industry Specification Group (ISG) Network Functions Virtualisation (NFV). Modal verbs

24、 terminology In the present document “shall“, “shall not“, “should“, “should not“, “may“, “need not“, “will“, “will not“, “can“ and “cannot“ are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of provisions). “must“ and “must not“ are NOT allo

25、wed in ETSI deliverables except when used in direct citation. ETSI ETSI GS NFV-REL 006 V3.1.1 (2018-02)6 1 Scope The present document specifies requirements for the purpose of Software Modifications, such that NFV service availability and continuity is maintained. All types of software related to Ne

26、twork Function Virtualisation (NFV) - e.g. Virtual Network Functions (VNF), Management and Orchestration (MANO) and Network Function Virtualisation Infrastructure (NFVI) as well as required controlling and supporting functionality will be addressed. Where applicable, external specifications may be r

27、eferenced to avoid duplication of work. The present document contains normative provisions. 2 References 2.1 Normative references References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited versio

28、n applies. For non-specific references, the latest version of the referenced document (including any amendments) applies. Referenced documents which are not found to be publicly available in the expected location might be found at https:/docbox.etsi.org/Reference/. NOTE: While any hyperlinks include

29、d in this clause were valid at the time of publication, ETSI cannot guarantee their long term validity. The following referenced documents are necessary for the application of the present document. 1 ETSI GS NFV 002 (V1.2.1): “Network Functions Virtualisation (NFV); Architectural Framework“. 2 ETSI

30、GS NFV-MAN 001 (V1.1.1): “Network Functions Virtualisation (NFV); Management and Orchestration“. 3 ETSI GS NFV-SWA 001 (V1.1.1): “Network Functions Virtualisation (NFV); Virtual Network Functions Architecture“. 4 ETSI GS NFV-IFA 011 (V2.1.1): “Network Functions Virtualisation (NFV); Management and O

31、rchestration; VNF Packaging Specification“. 5 ETSI GS NFV-IFA 013 (V2.1.1): “Network Functions Virtualisation (NFV); Management and Orchestration; Os-Ma-Nfvo reference point - Interface and Information Model Specification“. 6 ETSI GS NFV-IFA 007 (V2.1.1): “Network Functions Virtualisation (NFV); Man

32、agement and Orchestration; Or-Vnfm reference point - Interface and Information Model Specification“. 7 ETSI GS NFV-IFA 005 (V2.1.1): “Network Functions Virtualisation (NFV); Management and Orchestration; Or-Vi reference point - Interface and Information Model Specification“. 8 ETSI GS NFV-IFA 008 (V

33、2.1.1): “Network Functions Virtualisation (NFV); Management and Orchestration; Ve-Vnfm reference point - Interface and Information Model Specification“. 9 ETSI GS NFV-SOL 004 (V2.3.1): “Network Functions Virtualisation (NFV) Release 2; Protocols and Data Models; VNF Package specification“. 10 ETSI G

34、S NFV-SOL 005 (V2.4.1): “Network Functions Virtualisation (NFV) Release 2; Protocols and Data Models; RESTful protocols specification for the Os-Ma-nfvo Reference Point“. 11 ETSI GS NFV-SOL 003 (V2.3.1): “Network Functions Virtualisation (NFV) Release 2; Protocols and Data Models; RESTful protocols

35、specification for the Or-Vnfm Reference Point“. ETSI ETSI GS NFV-REL 006 V3.1.1 (2018-02)7 2.2 Informative references References are either specific (identified by date of publication and/or edition number or version number) or non-specific. For specific references, only the cited version applies. F

36、or non-specific references, the latest version of the referenced document (including any amendments) applies. NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee their long term validity. The following referenced documents are not necessary

37、 for the application of the present document but they assist the user with regard to a particular subject area. i.1 CRN website: “The 10 Biggest Cloud Outages Of 2013“. NOTE: Available at http:/ i.2 ETSI GR NFV-REL 007 (V1.1.1): “Network Functions Virtualisation (NFV); Reliability; Report on the res

38、ilience of NFV-MANO critical capabilities“. i.3 ETSI GR NFV-IFA 021 (V0.11.0): “Network Functions Virtualisation (NFV) Release 3; Management and Orchestration; Report on management of NFV-MANO and automated deployment of EM and other OSS functions“. i.4 ETSI GS NFV-TST 001 (V1.1.1): “Network Functio

39、ns Virtualisation (NFV); Pre-deployment Testing; Report on Validation of NFV Environments and Services“. i.5 ETSI GS NFV 001 (V1.1.1): “Network Functions Virtualisation (NFV); Use Cases“. i.6 Iulian Meamtiu and Tudor Dumistras: “Cloud Software Upgrades: Challenges and Opportunities“, IEEE conference

40、International Workshop on the Maintenance and Evolution of Service-Oriented and Cloud-Based Systems (MESOCA), 2011. NOTE: Available at https:/www.umiacs.umd.edu/tdumitra/papers/MESOCA-2011.pdf. i.7 ETSI GS NFV-IFA 018: “Network Functions Virtualisation (NFV); Acceleration Technologies; Network Accel

41、eration Interface Specification“. i.8 ETSI GS NFV-REL 003 (V1.1.2): “Network Functions Virtualisation (NFV); Reliability; Report on Models and Features for End-to-End Reliability“. i.9 ETSI GR NFV-TST 006 (V0.0.8): “Network Functions Virtualisation (NFV); Testing; Report on NFV CICD and Devops“. 3 D

42、efinitions and abbreviations 3.1 Definitions For the purposes of the present document, the following terms and definitions apply: software rollback: software modification process that reverts the system from the newly deployed software version to the previously deployed software version software upd

43、ate: software modification process for bug fixes or enhancements without adding, modifying or removing functionality, interfaces or protocols software upgrade: software modification process aimed at adding, modifying or removing functionality, interfaces or protocols ETSI ETSI GS NFV-REL 006 V3.1.1

44、(2018-02)8 3.2 Abbreviations For the purposes of the present document, the following abbreviations apply: BSS Business Support System CompHost Compute Host DF Deployment Flavor DUT Devices Under Test EM Element Manager EMS Element Management System EPC Evolved Packet Core FUT Functions Under Test IE

45、 Information ElementIMS IP Multimedia System KPI Key Performance Indicator LCM Life Cycle Management MANO Management and Orchestration NAT Network Address Translation NFV TST ETSI NFV Test Working Group NFV Network Function Virtualisation NFVI NFV Infrastructure NFVO NFV orchestratorNS Network Servi

46、ce NSD Network Service Descriptor O in addition, required controlling and supporting functionality is addressed. Where applicable, external specifications may be referenced to avoid duplication of work. It should be noted that supporting work on the test processes for Software Modification is addres

47、sed by the ETSI NFV Test Working Group (NFV TST). As appropriate, references to the TST work and/or brief descriptions of the developed test processes are provided. An overview of the overall document framework is as follows. Software related to NFV may be of different types. Clause 5.1 refers to th

48、e three working domains identified for NFV in previous work 1 and associates specific software types to these domains. The purpose for delineating these individual software types is to align specific processes or methods that may apply to the modification of each type of software as well as the corr

49、esponding requirements to support such processes. The software types are as follows: Clause 5.1.2 - VNFs that support the full range of Network Services and Applications: note that components comprising a VNF are referred to as VNF Components (VNFC). Thus modifications may be done for individual VNFCs or VNFs. VNF Descriptors and Attributes are included as appropriate. Clause 5.1.3 - MANO Software: Software components that provide MANO functionalit