1、 I n t e r n a t i o n a l T e l e c o m m u n i c a t i o n U n i o n ITU-T Y.3502 TELECOMMUNICATION STANDARDIZATION SECTOR OF ITU (08/2014) SERIES Y: GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS Cloud Computing Information technology Cloud computing Ref
2、erence architecture Recommendation ITU-T Y.3502 ITU-T Y-SERIES RECOMMENDATIONS GLOBAL INFORMATION INFRASTRUCTURE, INTERNET PROTOCOL ASPECTS AND NEXT-GENERATION NETWORKS GLOBAL INFORMATION INFRASTRUCTURE General Y.100Y.199 Services, applications and middleware Y.200Y.299 Network aspects Y.300Y.399 In
3、terfaces and protocols Y.400Y.499 Numbering, addressing and naming Y.500Y.599 Operation, administration and maintenance Y.600Y.699 Security Y.700Y.799 Performances Y.800Y.899 INTERNET PROTOCOL ASPECTS General Y.1000Y.1099 Services and applications Y.1100Y.1199 Architecture, access, network capabilit
4、ies and resource management Y.1200Y.1299 Transport Y.1300Y.1399 Interworking Y.1400Y.1499 Quality of service and network performance Y.1500Y.1599 Signalling Y.1600Y.1699 Operation, administration and maintenance Y.1700Y.1799 Charging Y.1800Y.1899 IPTV over NGN Y.1900Y.1999 NEXT GENERATION NETWORKS F
5、rameworks and functional architecture models Y.2000Y.2099 Quality of Service and performance Y.2100Y.2199 Service aspects: Service capabilities and service architecture Y.2200Y.2249 Service aspects: Interoperability of services and networks in NGN Y.2250Y.2299 Enhancements to NGN Y.2300Y.2399 Networ
6、k management Y.2400Y.2499 Network control architectures and protocols Y.2500Y.2599 Packet-based Networks Y.2600Y.2699 Security Y.2700Y.2799 Generalized mobility Y.2800Y.2899 Carrier grade open environment Y.2900Y.2999 FUTURE NETWORKS Y.3000Y.3499 CLOUD COMPUTING Y.3500Y.3999 For further details, ple
7、ase refer to the list of ITU-T Recommendations. Rec. ITU-T Y.3502 (08/2014) i INTERNATIONAL STANDARD ISO/IEC 17789 RECOMMENDATION ITU-T Y.3502 Information technology Cloud computing Reference architecture Summary Rec. ITU-T Y.3502 | ISO/IEC 17789 provides the reference architecture for cloud computi
8、ng, which includes the cloud computing roles, cloud computing activities, and the cloud computing functional components and their relationships. History Edition Recommendation Approval Study Group Unique ID* 1.0 ITU-T Y.3502 2014-08-13 13 11.1002/1000/12209 _ * To access the Recommendation, type the
9、 URL http:/handle.itu.int/ in the address field of your web browser, followed by the Recommendations unique ID. For example, http:/handle.itu.int/11.1002/1000/11830-en. ii Rec. ITU-T Y.3502 (08/2014) FOREWORD The International Telecommunication Union (ITU) is the United Nations specialized agency in
10、 the field of telecommunications, information and communication technologies (ICTs). The ITU Telecommunication Standardization Sector (ITU-T) is a permanent organ of ITU. ITU-T is responsible for studying technical, operating and tariff questions and issuing Recommendations on them with a view to st
11、andardizing telecommunications on a worldwide basis. The World Telecommunication Standardization Assembly (WTSA), which meets every four years, establishes the topics for study by the ITU-T study groups which, in turn, produce Recommendations on these topics. The approval of ITU-T Recommendations is
12、 covered by the procedure laid down in WTSA Resolution 1. In some areas of information technology which fall within ITU-Ts purview, the necessary standards are prepared on a collaborative basis with ISO and IEC. NOTE In this Recommendation, the expression “Administration“ is used for conciseness to
13、indicate both a telecommunication administration and a recognized operating agency. Compliance with this Recommendation is voluntary. However, the Recommendation may contain certain mandatory provisions (to ensure, e.g., interoperability or applicability) and compliance with the Recommendation is ac
14、hieved when all of these mandatory provisions are met. The words “shall“ or some other obligatory language such as “must“ and the negative equivalents are used to express requirements. The use of such words does not suggest that compliance with the Recommendation is required of any party. INTELLECTU
15、AL PROPERTY RIGHTSITU draws attention to the possibility that the practice or implementation of this Recommendation may involve the use of a claimed Intellectual Property Right. ITU takes no position concerning the evidence, validity or applicability of claimed Intellectual Property Rights, whether
16、asserted by ITU members or others outside of the Recommendation development process. As of the date of approval of this Recommendation, ITU had not received notice of intellectual property, protected by patents, which may be required to implement this Recommendation. However, implementers are cautio
17、ned that this may not represent the latest information and are therefore strongly urged to consult the TSB patent database at http:/www.itu.int/ITU-T/ipr/. ITU 2014 All rights reserved. No part of this publication may be reproduced, by any means whatsoever, without the prior written permission of IT
18、U. Rec. ITU-T Y.3502 (08/2014) iii CONTENTS Page 1 Scope 1 2 Normative references 1 2.1 Identical Recommendations | International Standards 1 2.2 Additional references 1 3 Definitions 1 3.1 Terms defined elsewhere . 1 3.2 Terms defined in this Recommendation | International Standard 1 4 Abbreviation
19、s . 2 5 Conventions 2 6 Cloud computing reference architecture goals and objectives 3 7 Reference architecture concepts . 4 7.1 CCRA architectural views . 4 7.2 User view of cloud computing 5 7.3 Functional view of cloud computing . 7 7.4 Relationship between the user view and the functional view 8
20、7.5 Relationship of the user view and functional view to cross-cutting aspects 8 7.6 Implementation view of cloud computing . 9 7.7 Deployment view of cloud computing 9 8 User view 9 8.1 Introduction to roles, sub-roles and cloud computing activities 9 8.2 Cloud service customer . 10 8.3 Cloud servi
21、ce provider 14 8.4 Cloud service partner 21 8.5 Cross-cutting aspects . 23 9 Functional view 29 9.1 Functional architecture 29 9.2 Functional components . 30 10 Relationship between the user view and the functional view . 38 10.1 General 38 10.2 Overview . 38 Annex A Further details regarding the us
22、er view and functional view . 44 A.1 The cloud service customercloud service provider relationship 44 A.2 The providerpeer provider (or “inter-cloud“) relationship 47 A.3 The cloud service developercloud service provider relationship . 50 A.4 The cloud service providerAuditor relationship 51 Bibliog
23、raphy 53 ISO/IEC 17789:2014 (E) Rec. ITU-T Y.3502 (08/2014) 1 INTERNATIONAL STANDARD RECOMMENDATION ITU-T Information technology Cloud computing Reference architecture 1 Scope This Recommendation | International Standard specifies the cloud computing reference architecture (CCRA). The reference arch
24、itecture includes the cloud computing roles, cloud computing activities, and the cloud computing functional components and their relationships. 2 Normative references The following Recommendations and International Standards contain provisions which, through reference in this text, constitute provis
25、ions of this Recommendation | International Standard. At the time of publication, the editions indicated were valid. All Recommendations and Standards are subject to revision, and parties to agreements based on this Recommendation | International Standard are encouraged to investigate the possibilit
26、y of applying the most recent edition of the Recommendations and Standards listed below. Members of IEC and ISO maintain registers of currently valid International Standards. The Telecommunication Standardization Bureau of the ITU maintains a list of currently valid ITU-T Recommendations. 2.1 Identi
27、cal Recommendations | International Standards Recommendation ITU-T Y.3500 (2014) | ISO/IEC 17788:2014, Information technology Cloud computing Overview and vocabulary. 2.2 Additional references ISO/IEC 29100:2011, Information technology Security techniques Privacy framework. 3 Definitions For the pur
28、poses of this Recommendation | International Standard, the terms and definitions in Rec. ITU-T Y.3500 | ISO/IEC 17788 and the following definitions apply. 3.1 Terms defined elsewhere The following term is defined in ISO/IEC/IEEE 42010: 3.1.1 architecture: Fundamental concepts or properties of a syst
29、em in its environment embodied in its elements, relationships and in the principles of its design and evolution. The following term is defined in ISO/IEC 29100: 3.1.2 personally identifiable information (PII): Any information that (a) can be used to identify the PII principal to whom such informatio
30、n relates, or (b) is or might be directly or indirectly linked to a PII principal. NOTE To determine whether a PII principal is identifiable, account should be taken of all the means which can reasonably be used by the privacy stakeholder holding the data, or by any other party, to identify that nat
31、ural person. 3.2 Terms defined in this Recommendation | International Standard This Recommendation | International Standard defines the following terms: 3.2.1 activity: A specified pursuit or set of tasks. 3.2.2 cloud service product: A cloud service, allied to the set of business terms under which
32、the cloud service is offered. NOTE Business terms can include pricing, rating and service levels. 3.2.3 functional component: A functional building block needed to engage in an activity (clause 3.2.1), backed by an implementation. ISO/IEC 17789:2014 (E) 2 Rec. ITU-T Y.3502 (08/2014) 3.2.4 peer cloud
33、 service: A cloud service of one cloud service provider which is used as part of a cloud service of one or more other cloud service providers. 3.2.5 peer cloud service provider: A cloud service provider who provides one or more cloud services for use by one or more other cloud service providers as p
34、art of their cloud services. 3.2.6 product catalogue: A listing of all the cloud service products (clause 3.2.2) which cloud service providers make available to cloud service customers. 3.2.7 role: A set of activities (clause 3.2.1) that serves a common purpose. 3.2.8 service catalogue: A listing of
35、 all the cloud services of a particular cloud service provider. 3.2.9 sub-role: A subset of the activities (clause 3.2.1) of a given role (clause 3.2.7). 4 Abbreviations For the purposes of this Recommendation | International Standard, the following abbreviations apply: API Application Programming I
36、nterface CaaS Communications as a Service CCRA Cloud Computing Reference Architecture CPU Central Processing Unit CS Cloud Service CSC Cloud Service Customer CSN Cloud Service partner CSP Cloud Service Provider IaaS Infrastructure as a Service ICT Information and Communication Technology KPI Key Per
37、formance Indicator MSA Master Service Agreement NaaS Network as a Service PaaS Platform as a Service PII Personally Identifiable Information QoS Quality of Service RAM Random Access Memory SaaS Software as a Service SLA Service Level Agreement ToS Terms of Service T to describe the fundamental chara
38、cteristics of cloud computing systems; to specify basic cloud computing activities and functional components, and describe their relationships to each other and to the environment; to identify principles guiding the design and evolution of the CCRA. The CCRA supports the following important standard
39、ization objectives: to enable the production of a coherent set of international standards for cloud computing; to provide a technology-neutral reference point for defining standards for cloud computing; to encourage openness and transparency in the identification of cloud computing benefits and risk
40、s. The CCRA focuses on the requirements of “what“ cloud services provide and not on “how to“ design cloud-based solutions and implementations. The CCRA does not represent the system architecture of a specific cloud computing system, although it could put constraints on a specific system. The CCRA is
41、 not tied to any specific vendor products, services or reference implementation; nor does it define prescriptive solutions that inhibit innovation. The CCRA is also intended to: facilitate the understanding of the operational intricacies of cloud computing; illustrate and provide understanding of va
42、rious cloud services and their provisioning and use; provide a technical reference to enable the international community to understand, discuss, categorize and compare cloud services; be a tool for describing, discussing, and for developing a system-specific architecture using a common framework of
43、reference; facilitate the analysis of candidate standards in areas including security, interoperability, portability, reversibility, reliability and service management, and support analysis of reference implementations. ISO/IEC 17789:2014 (E) 4 Rec. ITU-T Y.3502 (08/2014) 7 Reference architecture co
44、ncepts This Recommendation | International standard defines a CCRA that can serve as a fundamental reference point for cloud computing standardization and which provides an overall framework for the basic concepts and principles of a cloud computing system. This clause provides an overview of the ar
45、chitectural approaches that are used in this Recommendation | International standard. 7.1 CCRA architectural views Cloud computing systems can be described using a viewpoint approach. Four distinct viewpoints are used in the CCRA (see Figure 7-1): user view; functional view; implementation view; and
46、 deployment view. Figure 7-1 Transformations between architectural views Table 7-1 provides a description of each of these views. Table 7-1 CCRA views CCRA view Description of the CCRA view Scope User view The system context, the parties, the roles, the sub-roles and the cloud computing activities W
47、ithin scope Functional view The functions necessary for the support of cloud computing activities Within scope Implementation view The functions necessary for the implementation of a cloud service within service parts and/or infrastructure parts Out of scope Deployment view How the functions of a cl
48、oud service are technically implemented within already existing infrastructure elements or within new elements to be introduced in this infrastructure Out of scope NOTE While details of the user view and functional view are addressed within this Recommendation | International Standard, the implement
49、ation and deployment views are related to technology and vendor-specific cloud computing implementations and actual deployments, and are therefore out of the scope of this Recommendation | International Standard. Figure 7-2 shows the transition from the user view to the functional view. Details are presented in clause 7.4. ISO/IEC 17789:2014 (E) Rec. ITU-T Y.3502 (08/2014) 5 Y . 3 5 0 2 (1 4 )_ F 7 -2Fu n ct i o n alco mp o n en tPart yRo l eA s
