A YANG Data Model for Host Power Monitoring

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Table of Contents

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.¶

[RFC8348] provides a model for server hardware management, and [I-D.y3bp-ivy-network-inventory-yang] is trying to extend the work to routers and other network elements. [RFC6022] already provides a model for NETCONF Monitoring, but nothing about power consumption. That gap is currently being addressed by [I-D.li-ivy-power]. At present, the YANG model for energy consumption management remains at the concept of using SDN controller/management platform as NETCONF client and router/switch as NETCONF server. Standard between router/switch and host is still a gap. This document focuses on power consumption monitoring and extends the work further to hosts.¶

2. Model Structure

       +--------------------------------------------------+
       |                                                  |
       |        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

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

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
        "The 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.¶

5. IANA Considerations

This document makes no requests for IANA.¶

Authors' Addresses