Network Working Group A. Bierman Internet-Draft YumaWorks Intended status: Standards Track M. Bjorklund Expires: April 19, 2018 Tail-f Systems J. Dong Huawei Technologies D. Romascanu October 16, 2017 A YANG Data Model for Hardware Management draft-ietf-netmod-entity-05 Abstract This document defines a YANG data model for the management of hardware on a single server. Status of This Memo This Internet-Draft is submitted in full conformance with the provisions of BCP 78 and BCP 79. Internet-Drafts are working documents of the Internet Engineering Task Force (IETF). Note that other groups may also distribute working documents as Internet-Drafts. The list of current Internet- Drafts is at http://datatracker.ietf.org/drafts/current/. Internet-Drafts are draft documents valid for a maximum of six months and may be updated, replaced, or obsoleted by other documents at any time. It is inappropriate to use Internet-Drafts as reference material or to cite them other than as "work in progress." This Internet-Draft will expire on April 19, 2018. Copyright Notice Copyright (c) 2017 IETF Trust and the persons identified as the document authors. All rights reserved. This document is subject to BCP 78 and the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info) in effect on the date of publication of this document. Please review these documents carefully, as they describe your rights and restrictions with respect to this document. Code Components extracted from this document must include Simplified BSD License text as described in Section 4.e of Bierman, et al. Expires April 19, 2018 [Page 1]
Internet-Draft YANG Hardware Management October 2017 the Trust Legal Provisions and are provided without warranty as described in the Simplified BSD License. Table of Contents 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 2 1.1. Terminology . . . . . . . . . . . . . . . . . . . . . . . 2 1.1.1. Tree Diagrams . . . . . . . . . . . . . . . . . . . . 3 2. Objectives . . . . . . . . . . . . . . . . . . . . . . . . . 3 3. Hardware Data Model . . . . . . . . . . . . . . . . . . . . . 4 3.1. The Components Lists . . . . . . . . . . . . . . . . . . 5 4. Relationship to ENTITY-MIB . . . . . . . . . . . . . . . . . 5 5. Relationship to ENTITY-SENSOR-MIB . . . . . . . . . . . . . . 6 6. Relationship to ENTITY-STATE-MIB . . . . . . . . . . . . . . 7 7. Hardware YANG Module . . . . . . . . . . . . . . . . . . . . 7 8. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 35 8.1. URI Registrations . . . . . . . . . . . . . . . . . . . . 35 8.2. YANG Module Registrations . . . . . . . . . . . . . . . . 35 9. Security Considerations . . . . . . . . . . . . . . . . . . . 36 10. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . 37 11. Normative References . . . . . . . . . . . . . . . . . . . . 37 Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 38 1. Introduction This document defines a YANG [RFC7950] data model for the management of hardware on a single server. The data model includes configuration and system state (status information and counters for the collection of statistics). 1.1. Terminology The keywords "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]. The following terms are defined in [I-D.ietf-netmod-revised-datastores] and are not redefined here: o client o server o configuration o system state Bierman, et al. Expires April 19, 2018 [Page 2]
Internet-Draft YANG Hardware Management October 2017 o operational state o intended configuration 1.1.1. Tree Diagrams A simplified graphical representation of the data model is used in this document. The meaning of the symbols in these diagrams is as follows: o Brackets "[" and "]" enclose list keys. o Abbreviations before data node names: "rw" means configuration data (read-write) and "ro" state data (read-only). o Symbols after data node names: "?" means an optional node, "!" means a presence container, and "*" denotes a list and leaf-list. o Parentheses enclose choice and case nodes, and case nodes are also marked with a colon (":"). o Ellipsis ("...") stands for contents of subtrees that are not shown. 2. Objectives This section describes some of the design objectives for the hardware model. o There are many common properties used to identify hardware components, which need to be supported in the hardware data model. o There are many important information and states about the components, which needs to be collected from the devices which support the hardware data model. o The hardware data model SHOULD be suitable for new implementations to use as is. o The hardware data model defined in this document can be implemented on a system that also implements ENTITY-MIB, thus the mapping between the hardware data model and ENTITY-MIB SHOULD be clear. o The data model should support pre-provisioning of hardware components. Bierman, et al. Expires April 19, 2018 [Page 3]
Internet-Draft YANG Hardware Management October 2017 3. Hardware Data Model This document defines the YANG module "ietf-hardware", which has the following structure: module: ietf-hardware +--rw hardware +--ro last-change? yang:date-and-time +--rw component* [name] +--rw name string +--rw class identityref +--ro physical-index? int32 {entity-mib}? +--ro description? string +--rw parent? -> ../../component/name +--rw parent-rel-pos? int32 +--ro contains-child* -> ../../component/name +--ro hardware-rev? string +--ro firmware-rev? string +--ro software-rev? string +--ro serial-num? string +--rw mfg-name? string +--ro model-name? string +--rw alias? string +--rw asset-id? string +--ro is-fru? boolean +--ro mfg-date? yang:date-and-time +--rw uri* inet:uri +--ro uuid? yang:uuid +--rw state {hardware-state}? | +--ro state-last-changed? yang:date-and-time | +--rw admin-state? admin-state | +--ro oper-state? oper-state | +--ro usage-state? usage-state | +--ro alarm-state? alarm-state | +--ro standby-state? standby-state +--ro sensor-data {hardware-sensor}? +--ro value? sensor-value +--ro value-type? sensor-value-type +--ro value-scale? sensor-value-scale +--ro value-precision? sensor-value-precision +--ro oper-status? sensor-status +--ro units-display? string +--ro value-timestamp? yang:date-and-time +--ro value-update-rate? uint32 notifications: +---n hardware-state-change +---n hardware-state-oper-enabled {hardware-state}? Bierman, et al. Expires April 19, 2018 [Page 4]
Internet-Draft YANG Hardware Management October 2017 | +--ro name? -> /hardware/component/name | +--ro admin-state? -> /hardware/component/state/admin-state | +--ro alarm-state? -> /hardware/component/state/alarm-state +---n hardware-state-oper-disabled {hardware-state}? +--ro name? -> /hardware/component/name +--ro admin-state? -> /hardware/component/state/admin-state +--ro alarm-state? -> /hardware/component/state/alarm-state 3.1. The Components Lists The data model for hardware presented in this document uses a flat list of components. Each component in the list is identified by its name. Furthermore, each component has a mandatory "class" leaf. The "iana-hardware" module defines YANG identities for the hardware types in the IANA-maintained "IANA-ENTITY-MIB" registry. The "class" leaf is a YANG identity that describes the type of the hardware. Vendors are encouraged to either directly use one of the common IANA-defined identities, or derive a more specific identity from one of them. 4. Relationship to ENTITY-MIB If the device implements the ENTITY-MIB [RFC6933], each entry in the "/hardware-state/component" list is mapped to one EntPhysicalEntry. Objects that are writable in the MIB are mapped to nodes in the "/hardware/component" list. The "physical-index" leaf MUST contain the value of the corresponding entPhysicalEntry's entPhysicalIndex. The "class" leaf is mapped to both entPhysicalClass and entPhysicalVendorType. If the value of the "class" leaf is an identity that is either derived from or is one of the identities in the "iana-hardware" module, then entPhysicalClass contains the corresponding IANAPhysicalClass enumeration value. Otherwise, entPhysicalClass contains the IANAPhysicalClass value "other(1)". Vendors are encouraged to define an identity (derived from an identity in "iana-hardware" if possible) for each enterprise-specific registration identifier used for entPhysicalVendorType, and use that identity for the "class" leaf. The following tables list the YANG data nodes with corresponding objects in the ENTITY-MIB. Bierman, et al. Expires April 19, 2018 [Page 5]
Internet-Draft YANG Hardware Management October 2017 +--------------------------------+----------------------------------+ | YANG data node in | ENTITY-MIB object | | /hardware/component | | +--------------------------------+----------------------------------+ | name | entPhysicalName | | class | entPhysicalClass | | | entPhysicalVendorType | | physical-index | entPhysicalIndex | | description | entPhysicalDescr | | parent | entPhysicalContainedIn | | parent-rel-pos | entPhysicalParentRelPos | | contains-child | entPhysicalChildIndex | | hardware-rev | entPhysicalHardwareRev | | firmware-rev | entPhysicalFirmwareRev | | software-rev | entPhysicalSoftwareRev | | serial-num | entPhysicalSerialNum | | mfg-name | entPhysicalMfgName | | model-name | entPhysicalModelName | | alias | entPhysicalAlias | | asset-id | entPhysicalAssetID | | is-fru | entPhysicalIsFRU | | mfg-date | entPhysicalMfgDate | | uri | entPhysicalUris | | uuid | entPhysicalUUID | +--------------------------------+----------------------------------+ YANG Data Nodes and Related ENTITY-MIB Objects 5. Relationship to ENTITY-SENSOR-MIB If the device implements the ENTITY-SENSOR-MIB [RFC3433], each entry in the "/hardware/component" list where the container "sensor-data" exists is mapped to one EntPhySensorEntry. Bierman, et al. Expires April 19, 2018 [Page 6]
Internet-Draft YANG Hardware Management October 2017 +-------------------------------------+-----------------------------+ | YANG data node in | ENTITY-SENSOR-MIB object | | /hardware/component/sensor-data | | +-------------------------------------+-----------------------------+ | value | entPhySensorValue | | value-type | entPhySensorType | | value-scale | entPhySensorScale | | value-precision | entPhySensorPrecision | | oper-status | entPhySensorOperStatus | | units-display | entPhySensorUnitsDisplay | | value-timestamp | entPhySensorValueTimeStamp | | value-update-rate | entPhySensorValueUpdateRate | +-------------------------------------+-----------------------------+ YANG Data Nodes and Related ENTITY-SENSOR-MIB Objects 6. Relationship to ENTITY-STATE-MIB If the device implements the ENTITY-STATE-MIB [RFC4268], each entry in the "/hardware/component" list where the container "state" exists is mapped to one EntStateEntry. +------------------------------------------+------------------------+ | YANG data node in | ENTITY-STATE-MIB | | /hardware/component/state | object | +------------------------------------------+------------------------+ | state-last-changed | entStateLastChanged | | admin-state | entStateAdmin | | oper-state | entStateOper | | usage-state | entStateUsage | | alarm-state | entStateAlarm | | standby-state | entStateStandby | +------------------------------------------+------------------------+ YANG Data Nodes and Related ENTITY-SENSOR-MIB Objects 7. Hardware YANG Module <CODE BEGINS> file "ietf-hardware@2017-10-16.yang" module ietf-hardware { yang-version 1.1; namespace "urn:ietf:params:xml:ns:yang:ietf-hardware"; prefix hw; import ietf-inet-types { prefix inet; } Bierman, et al. Expires April 19, 2018 [Page 7]
Internet-Draft YANG Hardware Management October 2017 import ietf-yang-types { prefix yang; } import iana-hardware { prefix ianahw; } organization "IETF NETMOD (NETCONF Data Modeling Language) Working Group"; contact "WG Web: <http://tools.ietf.org/wg/netmod/> WG List: <mailto:netmod@ietf.org> Editor: Andy Bierman <mailto:andy@yumaworks.com> Editor: Martin Bjorklund <mailto:mbj@tail-f.com> Editor: Jie Dong <mailto:jie.dong@huawei.com> Editor: Dan Romascanu <mailto:dromasca@gmail.com>"; // RFC Ed.: replace XXXX and YYYY with actual RFC numbers and // remove this note. description "This module contains a collection of YANG definitions for managing hardware. This data model is designed for the Network Management Datastore Architecture defined in RFC YYYY. Copyright (c) 2017 IETF Trust and the persons identified as authors of the code. All rights reserved. Redistribution and use in source and binary forms, with or without modification, is permitted pursuant to, and subject to the license terms contained in, the Simplified BSD License set forth in Section 4.c of the IETF Trust's Legal Provisions Relating to IETF Documents (http://trustee.ietf.org/license-info). This version of this YANG module is part of RFC XXXX; see the RFC itself for full legal notices."; Bierman, et al. Expires April 19, 2018 [Page 8]
Internet-Draft YANG Hardware Management October 2017 // RFC Ed.: update the date below with the date of RFC publication // and remove this note. revision 2017-10-16 { description "Initial revision."; reference "RFC XXXX: A YANG Data Model for Hardware Management"; } /* * Features */ feature entity-mib { description "This feature indicates that the device implements the ENTITY-MIB."; reference "RFC 6933: Entity MIB (Version 4)"; } feature hardware-state { description "Indicates the ENTITY-STATE-MIB objects are supported"; reference "RFC 4268: Entity State MIB"; } feature hardware-sensor { description "Indicates the ENTITY-SENSOR-MIB objects are supported"; reference "RFC 3433: Entity Sensor MIB"; } /* * Typedefs */ typedef admin-state { type enumeration { enum unknown { value 1; description "The resource is unable to report administrative state."; } enum locked { value 2; description "The resource is administratively prohibited from use."; } Bierman, et al. Expires April 19, 2018 [Page 9]
Internet-Draft YANG Hardware Management October 2017 enum shutting-down { value 3; description "The resource usage is administratively limited to current instances of use."; } enum unlocked { value 4; description "The resource is not administratively prohibited from use."; } } description "Represents the various possible administrative states."; reference "RFC 4268: EntityAdminState"; } typedef oper-state { type enumeration { enum unknown { value 1; description "The resource is unable to report its operational state."; } enum disabled { value 2; description "The resource is totally inoperable."; } enum enabled { value 3; description "The resource is partially or fully operable."; } enum testing { value 4; description "The resource is currently being tested and cannot therefore report whether it is operational or not."; } } description "Represents the possible values of operational states."; reference "RFC 4268: EntityOperState"; } typedef usage-state { Bierman, et al. Expires April 19, 2018 [Page 10]
Internet-Draft YANG Hardware Management October 2017 type enumeration { enum unknown { value 1; description "The resource is unable to report usage state."; } enum idle { value 2; description "The resource is servicing no users."; } enum active { value 3; description "The resource is currently in use and it has sufficient spare capacity to provide for additional users."; } enum busy { value 4; description "The resource is currently in use, but it currently has no spare capacity to provide for additional users."; } } description "Represents the possible values of usage states."; reference "RFC 4268, EntityUsageState"; } typedef alarm-state { type bits { bit unknown { position 0; description "The resource is unable to report alarm state."; } bit under-repair { position 1; description "The resource is currently being repaired, which, depending on the implementation, may make the other values in this bit string not meaningful."; } bit critical { position 2; description "One or more critical alarms are active against the resource."; Bierman, et al. Expires April 19, 2018 [Page 11]
Internet-Draft YANG Hardware Management October 2017 } bit major { position 3; description "One or more major alarms are active against the resource."; } bit minor { position 4; description "One or more minor alarms are active against the resource."; } bit warning { position 5; description "One or more warning alarms are active against the resource."; } bit indeterminate { position 6; description "One or more alarms of whose perceived severity cannot be determined are active against this resource."; } } description "Represents the possible values of alarm states. An alarm is a persistent indication of an error or warning condition. When no bits of this attribute are set, then no active alarms are known against this component and it is not under repair."; reference "RFC 4268: EntityAlarmStatus"; } typedef standby-state { type enumeration { enum unknown { value 1; description "The resource is unable to report standby state."; } enum hot-standby { value 2; description "The resource is not providing service, but it will be immediately able to take over the role of the resource to be backed up, without the need for initialization Bierman, et al. Expires April 19, 2018 [Page 12]
Internet-Draft YANG Hardware Management October 2017 activity, and will contain the same information as the resource to be backed up."; } enum cold-standby { value 3; description "The resource is to back up another resource, but will not be immediately able to take over the role of a resource to be backed up, and will require some initialization activity."; } enum providing-service { value 4; description "The resource is providing service."; } } description "Represents the possible values of standby states."; reference "RFC 4268: EntityStandbyStatus"; } typedef sensor-value-type { type enumeration { enum other { value 1; description "A measure other than those listed below."; } enum unknown { value 2; description "An unknown measurement, or arbitrary, relative numbers"; } enum volts-AC { value 3; description "A measure of electric potential (alternating current)."; } enum volts-DC { value 4; description "A measure of electric potential (direct current)."; } enum amperes { value 5; description "A measure of electric current."; Bierman, et al. Expires April 19, 2018 [Page 13]
Internet-Draft YANG Hardware Management October 2017 } enum watts { value 6; description "A measure of power."; } enum hertz { value 7; description "A measure of frequency."; } enum celsius { value 8; description "A measure of temperature."; } enum percent-RH { value 9; description "A measure of percent relative humidity."; } enum rpm { value 10; description "A measure of shaft revolutions per minute."; } enum cmm { value 11; description "A measure of cubic meters per minute (airflow)."; } enum truth-value { value 12; description "Value is one of 1 (true) or 2 (false)"; } } description "A node using this data type represents the sensor measurement data type associated with a physical sensor value. The actual data units are determined by examining a node of this type together with the associated sensor-value-scale node. A node of this type SHOULD be defined together with nodes of type sensor-value-scale and sensor-value-precision. These three types are used to identify the semantics of a node of type sensor-value."; reference "RFC 3433: EntitySensorDataType"; Bierman, et al. Expires April 19, 2018 [Page 14]
Internet-Draft YANG Hardware Management October 2017 } typedef sensor-value-scale { type enumeration { enum yocto { value 1; description "Data scaling factor of 10^-24."; } enum zepto { value 2; description "Data scaling factor of 10^-21."; } enum atto { value 3; description "Data scaling factor of 10^-18."; } enum femto { value 4; description "Data scaling factor of 10^-15."; } enum pico { value 5; description "Data scaling factor of 10^-12."; } enum nano { value 6; description "Data scaling factor of 10^-9."; } enum micro { value 7; description "Data scaling factor of 10^-6."; } enum milli { value 8; description "Data scaling factor of 10^-3."; } enum units { value 9; description "Data scaling factor of 10^0."; Bierman, et al. Expires April 19, 2018 [Page 15]
Internet-Draft YANG Hardware Management October 2017 } enum kilo { value 10; description "Data scaling factor of 10^3."; } enum mega { value 11; description "Data scaling factor of 10^6."; } enum giga { value 12; description "Data scaling factor of 10^9."; } enum tera { value 13; description "Data scaling factor of 10^12."; } enum exa { value 14; description "Data scaling factor of 10^15."; } enum peta { value 15; description "Data scaling factor of 10^18."; } enum zetta { value 16; description "Data scaling factor of 10^21."; } enum yotta { value 17; description "Data scaling factor of 10^24."; } } description "A node using this data type represents a data scaling factor, represented with an International System of Units (SI) prefix. The actual data units are determined by examining a node of this type together with the associated sensor-value-type. Bierman, et al. Expires April 19, 2018 [Page 16]
Internet-Draft YANG Hardware Management October 2017 A node of this type SHOULD be defined together with nodes of type sensor-value-type and sensor-value-precision. Together, associated nodes of these three types are used to identify the semantics of a node of type sensor-value."; reference "RFC 3433: EntitySensorDataScale"; } typedef sensor-value-precision { type int32 { range "-8 .. 9"; } description "A node using this data type represents a sensor value precision range. A node of this type SHOULD be defined together with nodes of type sensor-value-type and sensor-value-scale. Together, associated nodes of these three types are used to identify the semantics of a node of type sensor-value. If a node of this type contains a value in the range 1 to 9, it represents the number of decimal places in the fractional part of an associated sensor-value fixed- point number. If a node of this type contains a value in the range -8 to -1, it represents the number of accurate digits in the associated sensor-value fixed-point number. The value zero indicates the associated sensor-value node is not a fixed-point number. Server implementers must choose a value for the associated sensor-value-precision node so that the precision and accuracy of the associated sensor-value node is correctly indicated. For example, a component representing a temperature sensor that can measure 0 degrees to 100 degrees C in 0.1 degree increments, +/- 0.05 degrees, would have an sensor-value-precision value of '1', an sensor-value-scale value of 'units', and an sensor-value ranging from '0' to '1000'. The sensor-value would be interpreted as 'degrees C * 10'."; reference "RFC 3433: EntitySensorPrecision"; } typedef sensor-value { type int32 { range "-1000000000 .. 1000000000"; Bierman, et al. Expires April 19, 2018 [Page 17]
Internet-Draft YANG Hardware Management October 2017 } description "A node using this data type represents an sensor value. A node of this type SHOULD be defined together with nodes of type sensor-value-type, sensor-value-scale, and sensor-value-precision. Together, associated nodes of those three types are used to identify the semantics of a node of this data type. The semantics of a node using this data type are determined by the value of the associated sensor-value-type node. If the associated sensor-value-type node is equal to 'voltsAC', 'voltsDC', 'amperes', 'watts', 'hertz', 'celsius', or 'cmm', then a node of this type MUST contain a fixed point number ranging from -999,999,999 to +999,999,999. The value -1000000000 indicates an underflow error. The value +1000000000 indicates an overflow error. The sensor-value-precision indicates how many fractional digits are represented in the associated sensor-value node. If the associated sensor-value-type node is equal to 'percentRH', then a node of this type MUST contain a number ranging from 0 to 100. If the associated sensor-value-type node is equal to 'rpm', then a node of this type MUST contain a number ranging from -999,999,999 to +999,999,999. If the associated sensor-value-type node is equal to 'truth-value', then a node of this type MUST contain either the value 1 (true) or the value 2 (false)'. If the associated sensor-value-type node is equal to 'other' or unknown', then a node of this type MUST contain a number ranging from -1000000000 to 1000000000."; reference "RFC 3433: EntitySensorValue"; } typedef sensor-status { type enumeration { enum ok { value 1; description "Indicates that the server can obtain the sensor value."; } enum unavailable { Bierman, et al. Expires April 19, 2018 [Page 18]
Internet-Draft YANG Hardware Management October 2017 value 2; description "Indicates that the server presently cannot obtain the sensor value."; } enum nonoperational { value 3; description "Indicates that the server believes the sensor is broken. The sensor could have a hard failure (disconnected wire), or a soft failure such as out-of-range, jittery, or wildly fluctuating readings."; } } description "A node using this data type represents the operational status of a physical sensor."; reference "RFC 3433: EntitySensorStatus"; } /* * Data nodes */ container hardware { description "Data nodes representing components. If the server supports configuration of hardware components, then this data model is instantiated in the configuration datastores supported by the server. The leaf-list 'datastore' for the module 'ietf-hardware' in the YANG library provides this information."; leaf last-change { type yang:date-and-time; config false; description "The time the '/hardware/component' list changed in the operational state."; } list component { key name; description "List of components. When the server detects a new hardware component, it Bierman, et al. Expires April 19, 2018 [Page 19]
Internet-Draft YANG Hardware Management October 2017 initializes a list entry in the operational state. If the server does not support configuration of hardware components, list entries in the operational state are initialized with values for all nodes as detected by the implementation. Otherwise, the following procedure is followed: 1. If there is an entry in the /hardware/component list in the intended configuration with values for the nodes 'class', 'parent', 'parent-rel-pos' that are equal to the detected values, then: 1a. If the configured entry has a value for 'mfg-name' that is equal to the detected value, or if the 'mfg-name' value cannot be detected, then the list entry in the operational state is initialized with the configured values for all configured nodes, including the 'name'. Otherwise, the list entry in the operational state is initialized with values for all nodes as detected by the implementation. The implementation may raise an alarm that informs about the 'mfg-name' mismatch condition. How this is done is outside the scope of this document. 1b. Otherwise (i.e., there is no matching configuration entry), the list entry in the operational state is initialized with values for all nodes as detected by the implementation. If the /hardware/component list in the intended configuration is modified, then the system MUST behave as if it re-initializes itself, and follow the procedure in (1)."; reference "RFC 6933: entPhysicalEntry"; leaf name { type string; description "The name assigned to this component. This name is not required to be the same as entPhysicalName."; } leaf class { Bierman, et al. Expires April 19, 2018 [Page 20]
Internet-Draft YANG Hardware Management October 2017 type identityref { base ianahw:hardware-class; } mandatory true; description "An indication of the general hardware type of the component."; reference "RFC 6933: entPhysicalClass"; } leaf physical-index { if-feature entity-mib; type int32 { range "1..2147483647"; } config false; description "The entPhysicalIndex for the entPhysicalEntry represented by this list entry."; reference "RFC 6933: entPhysicalIndex"; } leaf description { type string; config false; description "A textual description of component. This node should contain a string that identifies the manufacturer's name for the component and should be set to a distinct value for each version or model of the component."; reference "RFC 6933: entPhysicalDescr"; } leaf parent { type leafref { path "../../component/name"; require-instance false; } description "The name of the component that physically contains this component. If this leaf is not instantiated, it indicates that this component is not contained in any other component. In the event that a physical component is contained by more than one physical component (e.g., double-wide modules), this node contains the name of one of these Bierman, et al. Expires April 19, 2018 [Page 21]
Internet-Draft YANG Hardware Management October 2017 components. An implementation MUST use the same name every time this node is instantiated."; reference "RFC 6933: entPhysicalContainedIn"; } leaf parent-rel-pos { type int32 { range "0 .. 2147483647"; } description "An indication of the relative position of this child component among all its sibling components. Sibling components are defined as components that: o Share the same value of the 'parent' node; and o Share a common base identity for the 'class' node. Note that the last rule gives implementations flexibility in how components are numbered. For example, some implementations might have a single number series for all components derived from 'ianahw:port', while some others might have different number series for different components with identities derived from 'ianahw:port' (for example, one for RJ45 and one for SFP)."; reference "RFC 6933: entPhysicalParentRelPos"; } leaf-list contains-child { type leafref { path "../../component/name"; } config false; description "The name of the contained component."; reference "RFC 6933: entPhysicalChildIndex"; } leaf hardware-rev { type string; config false; description "The vendor-specific hardware revision string for the component. The preferred value is the hardware revision identifier actually printed on the component itself (if present)."; reference "RFC 6933: entPhysicalHardwareRev"; Bierman, et al. Expires April 19, 2018 [Page 22]
Internet-Draft YANG Hardware Management October 2017 } leaf firmware-rev { type string; config false; description "The vendor-specific firmware revision string for the component."; reference "RFC 6933: entPhysicalFirmwareRev"; } leaf software-rev { type string; config false; description "The vendor-specific software revision string for the component."; reference "RFC 6933: entPhysicalSoftwareRev"; } leaf serial-num { type string; config false; description "The vendor-specific serial number string for the component. The preferred value is the serial number string actually printed on the component itself (if present)."; reference "RFC 6933: entPhysicalSerialNum"; } leaf mfg-name { type string; description "The name of the manufacturer of this physical component. The preferred value is the manufacturer name string actually printed on the component itself (if present). Note that comparisons between instances of the model-name, firmware-rev, software-rev, and the serial-num nodes are only meaningful amongst component with the same value of mfg-name. If the manufacturer name string associated with the physical component is unknown to the server, then this node is not instantiated."; reference "RFC 6933: entPhysicalMfgName"; } Bierman, et al. Expires April 19, 2018 [Page 23]
Internet-Draft YANG Hardware Management October 2017 leaf model-name { type string; config false; description "The vendor-specific model name identifier string associated with this physical component. The preferred value is the customer-visible part number, which may be printed on the component itself. If the model name string associated with the physical component is unknown to the server, then this node is not instantiated."; reference "RFC 6933: entPhysicalModelName"; } leaf alias { type string; description "An 'alias' name for the component, as specified by a network manager, and provides a non-volatile 'handle' for the component. If no configured value exists, the server MAY set the value of this node to a locally unique value in the operational state. A server implementation MAY map this leaf to the entPhysicalAlias MIB object. Such an implementation needs to use some mechanism to handle the differences in size and characters allowed between this leaf and entPhysicalAlias. The definition of such a mechanism is outside the scope of this document."; reference "RFC 6933: entPhysicalAlias"; } leaf asset-id { type string; description "This node is a user-assigned asset tracking identifier for the component. A server implementation MAY map this leaf to the entPhysicalAssetID MIB object. Such an implementation needs to use some mechanism to handle the differences in size and characters allowed between this leaf and entPhysicalAssetID. The definition of such a mechanism is outside the scope of this document."; reference "RFC 6933: entPhysicalAssetID"; Bierman, et al. Expires April 19, 2018 [Page 24]
Internet-Draft YANG Hardware Management October 2017 } leaf is-fru { type boolean; config false; description "This node indicates whether or not this component is considered a 'field replaceable unit' by the vendor. If this node contains the value 'true', then this component identifies a field replaceable unit. For all components that are permanently contained within a field replaceable unit, the value 'false' should be returned for this node."; reference "RFC 6933: entPhysicalIsFRU"; } leaf mfg-date { type yang:date-and-time; config false; description "The date of manufacturing of the managed component."; reference "RFC 6933: entPhysicalMfgDate"; } leaf-list uri { type inet:uri; description "This node contains identification information about the component."; reference "RFC 6933: entPhysicalUris"; } leaf uuid { type yang:uuid; config false; description "A Universally Unique Identifier of the component."; reference "RFC 6933: entPhysicalUUID"; } container state { if-feature hardware-state; description "State-related nodes"; reference "RFC 4268: Entity State MIB"; leaf state-last-changed { type yang:date-and-time; Bierman, et al. Expires April 19, 2018 [Page 25]
Internet-Draft YANG Hardware Management October 2017 config false; description "The date and time when the value of any of the admin-state, oper-state, usage-state, alarm-state, or standby-state changed for this component. If there has been no change since the last re-initialization of the local system, this node contains the date and time of local system initialization. If there has been no change since the component was added to the local system, this node contains the date and time of the insertion."; reference "RFC 4268: entStateLastChanged"; } leaf admin-state { type admin-state; description "The administrative state for this component. This node refers to a component's administrative permission to service both other components within its containment hierarchy as well other users of its services defined by means outside the scope of this module. Some components exhibit only a subset of the remaining administrative state values. Some components cannot be locked, and hence this node exhibits only the 'unlocked' state. Other components cannot be shutdown gracefully, and hence this node does not exhibit the 'shutting-down' state."; reference "RFC 4268: entStateAdmin"; } leaf oper-state { type oper-state; config false; description "The operational state for this component. Note that this node does not follow the administrative state. An administrative state of down does not predict an operational state of disabled. Note that some implementations may not be able to accurately report oper-state while the admin-state node has a value other than 'unlocked'. In these cases, this Bierman, et al. Expires April 19, 2018 [Page 26]
Internet-Draft YANG Hardware Management October 2017 node MUST have a value of 'unknown'."; reference "RFC 4268: entStateOper"; } leaf usage-state { type usage-state; config false; description "The usage state for this component. This node refers to a component's ability to service more components in a containment hierarchy. Some components will exhibit only a subset of the usage state values. Components that are unable to ever service any components within a containment hierarchy will always have a usage state of 'busy'. Some components will only ever be able to support one component within its containment hierarchy and will therefore only exhibit values of 'idle' and 'busy'."; reference "RFC 4268, entStateUsage"; } leaf alarm-state { type alarm-state; config false; description "The alarm state for this component. It does not include the alarms raised on child components within its containment hierarchy."; reference "RFC 4268: entStateAlarm"; } leaf standby-state { type standby-state; config false; description "The standby state for this component. Some components will exhibit only a subset of the remaining standby state values. If this component cannot operate in a standby role, the value of this node will always be 'providing-service'."; reference "RFC 4268: entStateStandby"; } } container sensor-data { Bierman, et al. Expires April 19, 2018 [Page 27]
Internet-Draft YANG Hardware Management October 2017 when 'derived-from-or-self(../class, "ianahw:sensor")' { description "Sensor data nodes present for any component of type 'sensor'"; } if-feature hardware-sensor; config false; description "Sensor-related nodes."; reference "RFC 3433: Entity Sensor MIB"; leaf value { type sensor-value; description "The most recent measurement obtained by the server for this sensor. A client that periodically fetches this node should also fetch the nodes 'value-type', 'value-scale', and 'value-precision', since they may change when the value is changed."; reference "RFC 3433: entPhySensorValue"; } leaf value-type { type sensor-value-type; description "The type of data units associated with the sensor value"; reference "RFC 3433: entPhySensorType"; } leaf value-scale { type sensor-value-scale; description "The (power of 10) scaling factor associated with the sensor value"; reference "RFC 3433: entPhySensorScale"; } leaf value-precision { type sensor-value-precision; description "The number of decimal places of precision associated with the sensor value"; reference "RFC 3433: entPhySensorPrecision"; Bierman, et al. Expires April 19, 2018 [Page 28]
Internet-Draft YANG Hardware Management October 2017 } leaf oper-status { type sensor-status; description "The operational status of the sensor."; reference "RFC 3433: entPhySensorOperStatus"; } leaf units-display { type string; description "A textual description of the data units that should be used in the display of the sensor value."; reference "RFC 3433: entPhySensorUnitsDisplay"; } leaf value-timestamp { type yang:date-and-time; description "The time the status and/or value of this sensor was last obtained by the server."; reference "RFC 3433: entPhySensorValueTimeStamp"; } leaf value-update-rate { type uint32; units "milliseconds"; description "An indication of the frequency that the server updates the associated 'value' node, representing in milliseconds. The value zero indicates: - the sensor value is updated on demand (e.g., when polled by the server for a get-request), - the sensor value is updated when the sensor value changes (event-driven), - the server does not know the update rate."; reference "RFC 3433: entPhySensorValueUpdateRate"; } } } } /* * Notifications */ Bierman, et al. Expires April 19, 2018 [Page 29]
Internet-Draft YANG Hardware Management October 2017 notification hardware-state-change { description "A hardware-state-change notification is generated when the value of /hardware/last-change changes in the operational state."; reference "RFC 6933, entConfigChange"; } notification hardware-state-oper-enabled { if-feature hardware-state; description "A hardware-state-oper-enabled notification signifies that a component has transitioned into the 'enabled' state."; leaf name { type leafref { path "/hardware/component/name"; } description "The name of the component that has transitioned into the 'enabled' state."; } leaf admin-state { type leafref { path "/hardware/component/state/admin-state"; } description "The administrative state for the component."; } leaf alarm-state { type leafref { path "/hardware/component/state/alarm-state"; } description "The alarm state for the component."; } reference "RFC 4268, entStateOperEnabled"; } notification hardware-state-oper-disabled { if-feature hardware-state; description "A hardware-state-oper-disabled notification signifies that a component has transitioned into the 'disabled' state."; leaf name { type leafref { path "/hardware/component/name"; Bierman, et al. Expires April 19, 2018 [Page 30]
Internet-Draft YANG Hardware Management October 2017 } description "The name of the component that has transitioned into the 'disabled' state."; } leaf admin-state { type leafref { path "/hardware/component/state/admin-state"; } description "The administrative state for the component."; } leaf alarm-state { type leafref { path "/hardware/component/state/alarm-state"; } description "The alarm state for the component."; } reference "RFC 4268, entStateOperDisabled"; } } <CODE ENDS> <CODE BEGINS> file "iana-hardware@2017-10-16.yang" module iana-hardware { yang-version 1.1; namespace "urn:ietf:params:xml:ns:yang:iana-hardware"; prefix ianahw; organization "IANA"; contact " Internet Assigned Numbers Authority Postal: ICANN 4676 Admiralty Way, Suite 330 Marina del Rey, CA 90292 Tel: +1 310 823 9358 <mailto:iana@iana.org>"; description "IANA defined identities for hardware class."; reference Bierman, et al. Expires April 19, 2018 [Page 31]
Internet-Draft YANG Hardware Management October 2017 // RFC Ed.: replace XXXX with actual path and remove this note. "https://www.iana.org/assignments/XXXX"; // RFC Ed.: replace XXXX with actual RFC number and remove this // note. // RFC Ed.: update the date below with the date of RFC publication // and remove this note. revision 2017-10-16 { description "Initial revision."; reference "RFC XXXX: A YANG Data Model for Hardware Management"; } /* * Identities */ identity hardware-class { description "This identity is the base for all hardware class identifiers."; } identity unknown { base ianahw:hardware-class; description "This identity is applicable if the hardware class is unknown to the server."; } identity chassis { base ianahw:hardware-class; description "This identity is applicable if the hardware class is an overall container for networking equipment. Any class of physical component, except a stack, may be contained within a chassis; a chassis may only be contained within a stack."; } identity backplane { base ianahw:hardware-class; description "This identity is applicable if the hardware class is some sort of device for aggregating and forwarding networking traffic, such as a shared backplane in a modular ethernet switch. Note that an implementation may model a backplane as a single Bierman, et al. Expires April 19, 2018 [Page 32]
Internet-Draft YANG Hardware Management October 2017 physical component, which is actually implemented as multiple discrete physical components (within a chassis or stack)."; } identity container { base ianahw:hardware-class; description "This identity is applicable if the hardware class is capable of containing one or more removable physical entities, possibly of different types. For example, each (empty or full) slot in a chassis will be modeled as a container. Note that all removable physical components should be modeled within a container component, such as field-replaceable modules, fans, or power supplies. Note that all known containers should be modeled by the agent, including empty containers."; } identity power-supply { base ianahw:hardware-class; description "This identity is applicable if the hardware class is a power-supplying component."; } identity fan { base ianahw:hardware-class; description "This identity is applicable if the hardware class is a fan or other heat-reduction component."; } identity sensor { base ianahw:hardware-class; description "This identity is applicable if the hardware class is some sort of sensor, such as a temperature sensor within a router chassis."; } identity module { base ianahw:hardware-class; description "This identity is applicable if the hardware class is some sort of self-contained sub-system. If a module component is removable, then it should be modeled within a container component; otherwise, it should be modeled directly within another physical component (e.g., a chassis or another Bierman, et al. Expires April 19, 2018 [Page 33]
Internet-Draft YANG Hardware Management October 2017 module)."; } identity port { base ianahw:hardware-class; description "This identity is applicable if the hardware class is some sort of networking port, capable of receiving and/or transmitting networking traffic."; } identity stack { base ianahw:hardware-class; description "This identity is applicable if the hardware class is some sort of super-container (possibly virtual) intended to group together multiple chassis entities. A stack may be realized by a virtual cable, a real interconnect cable attached to multiple chassis, or multiple interconnect cables. A stack should not be modeled within any other physical components, but a stack may be contained within another stack. Only chassis components should be contained within a stack."; } identity cpu { base ianahw:hardware-class; description "This identity is applicable if the hardware class is some sort of central processing unit."; } identity energy-object { base ianahw:hardware-class; description "This identity is applicable if the hardware class is some sort of energy object, i.e., a piece of equipment that is part of or attached to a communications network that is monitored, controlled, or aids in the management of another device for Energy Management."; } identity battery { base ianahw:hardware-class; description "This identity is applicable if the hardware class is some sort of battery."; } Bierman, et al. Expires April 19, 2018 [Page 34]
Internet-Draft YANG Hardware Management October 2017 identity storage-drive { base ianahw:hardware-class; description "This identity is applicable if the hardware class is some sort of component with data storage capability as main functionality, e.g., disk drive (HDD), solid state device (SSD), hybrid (SSHD), object storage (OSD) or other."; } } <CODE ENDS> 8. IANA Considerations This document defines the initial version of the IANA-maintained "iana-hardware" YANG module. The "iana-hardware" YANG module is intended to reflect the "IANA-ENTITY-MIB" MIB module so that if a new enumeration is added to the "IANAPhysicalClass" TEXTUAL-CONVENTION, the same class is added as an identity derived from "ianahw:hardware-class". When the "iana-hardware" YANG module is updated, a new "revision" statement must be added in front of the existing revision statements. 8.1. URI Registrations This document registers two URIs in the IETF XML registry [RFC3688]. Following the format in RFC 3688, the following registrations are requested to be made. URI: urn:ietf:params:xml:ns:yang:iana-hardware Registrant Contact: The IESG. XML: N/A, the requested URI is an XML namespace. URI: urn:ietf:params:xml:ns:yang:ietf-hardware Registrant Contact: The IESG. XML: N/A, the requested URI is an XML namespace. 8.2. YANG Module Registrations This document registers two YANG modules in the YANG Module Names registry [RFC6020]. Bierman, et al. Expires April 19, 2018 [Page 35]
Internet-Draft YANG Hardware Management October 2017 name: iana-hardware namespace: urn:ietf:params:xml:ns:yang:iana-hardware prefix: ianahw reference: RFC XXXX name: ietf-hardware namespace: urn:ietf:params:xml:ns:yang:ietf-hardware prefix: hw reference: RFC XXXX 9. Security Considerations The YANG module defined in this memo is designed to be accessed via the NETCONF protocol [RFC6241]. The lowest NETCONF layer is the secure transport layer, and the mandatory-to-implement secure transport is Secure Shell (SSH) [RFC6242]. The NETCONF access control model [RFC6536] provides the means to restrict access for particular NETCONF users to a pre-configured subset of all available NETCONF protocol operations and content. There are a number of data nodes defined in this YANG module that are writable/creatable/deletable (i.e., config true, which is the default). These data nodes may be considered sensitive or vulnerable in some network environments. Write operations (e.g., edit-config) to these data nodes without proper protection can have a negative effect on network operations. These are the subtrees and data nodes and their sensitivity/vulnerability: /hardware/component/admin-state: Setting this node to 'locked' or 'shutting-down' can cause disruption of services ranging from those running on a port to those on an entire device, depending on the type of component. Some of the readable data nodes in this YANG module may be considered sensitive or vulnerable in some network environments. It is thus important to control read access (e.g., via get, get-config, or notification) to these data nodes. These are the subtrees and data nodes and their sensitivity/vulnerability: /hardware/component: The leafs in this list expose information about the physical components in a device, which may be used to identify the vendor, model, version, and specific device-identification information of each system component. /hardware/component/sensor-data/value: This node may expose the values of particular physical sensors in a device. Bierman, et al. Expires April 19, 2018 [Page 36]
Internet-Draft YANG Hardware Management October 2017 /hardware/component/state: Access to this node allows one to figure out what the active and standby resources in a device are. 10. Acknowledgments The authors wish to thank the following individuals, who all provided helpful comments on various draft versions of this document: Bart Bogaert, Timothy Carey, William Lupton, Juergen Schoenwaelder. 11. Normative References [I-D.ietf-netmod-revised-datastores] Bjorklund, M., Schoenwaelder, J., Shafer, P., Watsen, K., and R. Wilton, "Network Management Datastore Architecture", draft-ietf-netmod-revised-datastores-03 (work in progress), July 2017. [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>. [RFC3433] Bierman, A., Romascanu, D., and K. Norseth, "Entity Sensor Management Information Base", RFC 3433, DOI 10.17487/RFC3433, December 2002, <https://www.rfc- editor.org/info/rfc3433>. [RFC3688] Mealling, M., "The IETF XML Registry", BCP 81, RFC 3688, DOI 10.17487/RFC3688, January 2004, <https://www.rfc- editor.org/info/rfc3688>. [RFC4268] Chisholm, S. and D. Perkins, "Entity State MIB", RFC 4268, DOI 10.17487/RFC4268, November 2005, <https://www.rfc- editor.org/info/rfc4268>. [RFC6020] Bjorklund, M., Ed., "YANG - A Data Modeling Language for the Network Configuration Protocol (NETCONF)", RFC 6020, DOI 10.17487/RFC6020, October 2010, <https://www.rfc- editor.org/info/rfc6020>. [RFC6241] Enns, R., Ed., Bjorklund, M., Ed., Schoenwaelder, J., Ed., and A. Bierman, Ed., "Network Configuration Protocol (NETCONF)", RFC 6241, DOI 10.17487/RFC6241, June 2011, <https://www.rfc-editor.org/info/rfc6241>. [RFC6242] Wasserman, M., "Using the NETCONF Protocol over Secure Shell (SSH)", RFC 6242, DOI 10.17487/RFC6242, June 2011, <https://www.rfc-editor.org/info/rfc6242>. Bierman, et al. Expires April 19, 2018 [Page 37]
Internet-Draft YANG Hardware Management October 2017 [RFC6536] Bierman, A. and M. Bjorklund, "Network Configuration Protocol (NETCONF) Access Control Model", RFC 6536, DOI 10.17487/RFC6536, March 2012, <https://www.rfc- editor.org/info/rfc6536>. [RFC6933] Bierman, A., Romascanu, D., Quittek, J., and M. Chandramouli, "Entity MIB (Version 4)", RFC 6933, DOI 10.17487/RFC6933, May 2013, <https://www.rfc- editor.org/info/rfc6933>. [RFC7950] Bjorklund, M., Ed., "The YANG 1.1 Data Modeling Language", RFC 7950, DOI 10.17487/RFC7950, August 2016, <https://www.rfc-editor.org/info/rfc7950>. Authors' Addresses Andy Bierman YumaWorks Email: andy@yumaworks.com Martin Bjorklund Tail-f Systems Email: mbj@tail-f.com Jie Dong Huawei Technologies Email: jie.dong@huawei.com Dan Romascanu Email: dromasca@gmail.com Bierman, et al. Expires April 19, 2018 [Page 38]