green                                                           R. Xiong
Internet-Draft                                                    C. Liu
Intended status: Standards Track                                  Y. Guo
Expires: 19 April 2025                                      China Unicom
                                                         16 October 2024


              A YANG Data Model for Host Power Monitoring
            draft-xiong-green-host-power-monitoring-yang-00

Abstract

   This document will build a hierarchical YANG data model of SDN
   controller/management platform, router/switch and host to monitor the
   energy consumption of network devices and servers.  SDN controller/
   management platform obtains data from routers/switches, and routers/
   switches obtain data from hosts.  Therefore, in the overall
   hierarchical structure, the SDN controller/management platform
   directly obtains energy consumption data of all routers/switches, and
   indirectly obtains the specific energy consumption data of all hosts
   through routers/switches.

Status of This Memo

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   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
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   This Internet-Draft will expire on 19 April 2025.

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   Please review these documents carefully, as they describe your rights



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   and restrictions with respect to this document.  Code Components
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   provided without warranty as described in the Revised BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   2
     1.1.  Requirement Language  . . . . . . . . . . . . . . . . . .   3
   2.  Model Structure . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Basic Elements and Layers . . . . . . . . . . . . . . . .   3
     2.2.  Relationship Between Layers . . . . . . . . . . . . . . .   3
     2.3.  Hierarchy Representation  . . . . . . . . . . . . . . . .   4
   3.  YANG Data Model . . . . . . . . . . . . . . . . . . . . . . .   4
     3.1.  Tree Diagram  . . . . . . . . . . . . . . . . . . . . . .   4
     3.2.  YANG Model  . . . . . . . . . . . . . . . . . . . . . . .   4
   4.  Security Considerations . . . . . . . . . . . . . . . . . . .   5
   5.  IANA Considerations . . . . . . . . . . . . . . . . . . . . .   6
   6.  Normative References  . . . . . . . . . . . . . . . . . . . .   6
   Authors' Addresses  . . . . . . . . . . . . . . . . . . . . . . .   6

1.  Introduction

   In the era of computing power, the energy consumption of data centers
   has increased exponentially, which is mainly reflected in IT
   equipment.  IT equipments account for 45% of the overall energy
   consumption of data centers, of which hosts account for about 50%,
   storage systems account for about 35%, and network devices account
   for about 15%. Therefore, it is particularly important to focus on
   the energy consumption of network devices and hosts.

   This document will build a hierarchical YANG data model of SDN
   controller/management platform, router/switch and host to monitor the
   energy consumption of network devices and servers.  SDN controller/
   management platform obtains data from routers/switches, and routers/
   switches obtain data from hosts.  Therefore, in the overall
   hierarchical structure, the SDN controller/management platform
   directly obtains energy consumption data of all routers/switches, and
   indirectly obtains the specific energy consumption data of all hosts
   through routers/switches.











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1.1.  Requirement Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
   "OPTIONAL" in this document are to be interpreted as described in
   BCP 14 [RFC2119] [RFC8174] when, and only when, they appear in all
   capitals, as shown here.  These words may also appear in this
   document in lower case as plain English words, absent their normative
   meanings.

2.  Model Structure

2.1.  Basic Elements and Layers

   Layer 1: SDN controller/management platform

   SDN controller/management platform send requests to routers/switches
   to obtain configuration and status data, including power information
   of routers/switches themselves and what they have obtained from
   hosts.

   Layer 2: Routers/switches

   Routers/switches provide configuration and status data, including
   power information of routers/switches themselves and what they have
   obtained from hosts, and respond to requests from the SDN controller/
   management platform.  In addition, routers/switches send requests to
   hosts to obtain configuration and status data, including power
   information.

   Layer 3: Hosts

   Agent needs to be installed to interact with routers/switches for
   NETCONF information.  Hosts collect their energy consumption, and
   provide configuration and status data to routers/switches.

2.2.  Relationship Between Layers

   Relationship 1: Between router/switch and host

   Router/switch acts as a NETCONF client and host acts as a NETCONF
   server.  Host collects its energy consumption, and responds to the
   request of the upper-layer router/switch through the NETCONF agent to
   provide configuration and status data.  Router/switch obtains energy
   consumption data of its lower-layer hosts.

   Relationship 2: Between SDN controller/management platform and
   router/switch



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   SDN controller/management platform acts as a NETCONF client, and
   router/switch acts as a NETCONF server.  The SDN controller/
   management platform obtains energy consumption data of routers/
   switches, and energy consumption data of hosts which has been already
   obtained.

2.3.  Hierarchy Representation

               +--------------------------------------------------+
               |                                                  |
               |        SDN controller/management platform        |
               |                                                  |
               +----------+----------------------------+----------+
                          |                            |
               +----------+-----------+    +-----------+----------+
               |    router/switch     |    |     router/switch    |
               |          1           |    |           2          |
               +----+------------+----+    +----+------------+----+
                    |            |              |            |
               +----+----+  +----+----+    +----+----+  +----+----+
               |   host  |  |   host  |    |   host  |  |   host  |
               |   1.1   |  |   1.2   |    |   2.1   |  |   2.2   |
               +---------+  +---------+    +---------+  +---------+

                       Figure 1: Hierarchy representation

3.  YANG Data Model

3.1.  Tree Diagram

   module: power-statistics
     +--ro power-statistics
        +--ro network-device-statistics* [network-device-name]
           +--ro network-device-name     string
           +--ro network-device-power    uint32
           +--ro host-statistics*        [host-name]
              +--ro host-name            string
              +--ro host-power           uint32

   See [RFC8340] for a description of YANG trees.

3.2.  YANG Model

   This model contains references to [RFC6991].







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   module power-statistics {
     description
       "Module of power statistics.";
     list network-device-statistics {
       description
         "List of network devices statistics, i.e. routers/switches.";
       key "network-device-name";
       leaf network-device-name {
         type string;
         description
           "Names of network devices.";
       }
       leaf network-device-power {
         type uint32;
         units "watts";
         description
           "Power consumption of each network devices.";
       }
       list host-statistics {
         description
           "List of hosts.";
         key "host-name";
         leaf host-name {
           type string;
           description
             "Names of hosts.";
         }
         leaf host-power {
           type uint32;
           units "watts";
           description
             "Power consumption of each host.";
         }
       }
     }
   }

4.  Security Considerations

   YANG and other mechanisms already exist that help secure these
   interactions.  This document extends the scope of what can be
   controlled by the management plane, but creates no new access paths.
   Besides, all nodes in this document are "config false".  Once
   information leakage occures, the exposure of the topology of the
   entire network would be the worst situation.






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5.  IANA Considerations

   This document makes no requests for IANA.

6.  Normative References

   [RFC6991]  Schoenwaelder, J., Ed., "Common YANG Data Types",
              RFC 6991, DOI 10.17487/RFC6991, July 2013,
              <https://www.rfc-editor.org/info/rfc6991>.

   [RFC8340]  Bjorklund, M. and L. Berger, Ed., "YANG Tree Diagrams",
              BCP 215, RFC 8340, DOI 10.17487/RFC8340, March 2018,
              <https://www.rfc-editor.org/info/rfc8340>.

   [RFC2119]  Bradner, S., "Key words for use in RFCs to Indicate
              Requirement Levels", BCP 14, RFC 2119,
              DOI 10.17487/RFC2119, March 1997,
              <https://www.rfc-editor.org/info/rfc2119>.

   [RFC8174]  Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
              2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
              May 2017, <https://www.rfc-editor.org/info/rfc8174>.

Authors' Addresses

   Ruizhe Xiong
   China Unicom
   Email: xiongrz@chinaunicom.cn


   Chang Liu
   China Unicom
   Email: liuchang77@chinaunicom.cn


   Yue Guo
   China Unicom
   Email: guoy23@chinaunicom.cn













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