SOL002VNFLifecycleManagement_def.yaml

# Copyright (c) ETSI 2017.
# https://forge.etsi.org/etsi-forge-copyright-notice.txt

definitions:
  VnfInstance:
    description: >
      This type represents a VNF instance.
      * NOTE: Clause B.3.2 provides examples illustrating the relationship among the different run-time 
            data types (CP, VL and link ports) used to represent the connectivity of a VNF.

      * NOTE 1:	Modifying the value of this attribute shall not be performed when conflicts exist
                between the previous and the newly referred VNF package, i.e. when the new VNFD is
                changed with respect to the previous VNFD in other aspects than merely referencing
                to other VNF software images. In order to avoid misalignment of the VnfInstance with
                the current VNF's on-boarded VNF package, the values of attributes in the VnfInstance
                that have corresponding attributes in the VNFD shall be kept in sync with the values in the VNFD.
      * NOTE 2:	ETSI GS NFV-SOL 001 specifies the structure and format of the VNFD based on TOSCA specifications.
      * NOTE 3:	VNF configurable properties are sometimes also referred to as configuration parameters
                applicable to a VNF. Some of these are set prior to instantiation and cannot be modified
                if the VNF is instantiated, some are set prior to instantiation (are part of initial configuration)
                and can be modified later, and others can be set only after instantiation.
                The applicability of certain configuration may depend on the VNF and the required operation of
                the VNF at a certain point in time.
      * NOTE 4:	Upon creation of the VnfInstance structure, the VNFM shall create and initialize all child
                attributes of "vnfConfigurableProperties", "metadata" and "extensions" that were declared
                in the VNFD with a defined initial value. The defined initial values can be declared in the VNFD,
                and/or, in case of "metadata", obtained from the "CreateVnfRequest" structure. Child attributes of
                "vnfConfigurableProperties", "metadata" and "extensions" that have no defined initial value shall
                not be created, in order to be consistent with the semantics of the JSON Merge Patch method
                (see IETF RFC 7396) that interprets null values as deletion request.
      * NOTE 5:	It is possible to have several ExtManagedVirtualLinkInfo for the same VNF internal VL in case
                of a multi-site VNF spanning several VIMs. The set of ExtManagedVirtualLinkInfo corresponding
                to the same VNF internal VL shall indicate so by referencing to the same VnfVirtualLinkDesc
                and externally-managed multi-site VL instance (refer to clause 5.5.3.5).
      * NOTE 6:	Even though externally-managed internal VLs are also used for VNF-internal connectivity,
                they shall not be listed in the "vnfVirtualLinkResourceInfo" attribute as this would be redundant.

    type: object
    required:
      - id
      - vnfdId
      - vnfProvider
      - vnfProductName
      - vnfSoftwareVersion
      - vnfdVersion
      - instantiationState
      - _links
    properties:
      id:
        description: >
          Identifier of the VNF instance.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Identifier"
      vnfInstanceName:
        description: >
          Name of the VNF instance.
          This attribute can be modified with the PATCH method.
        type: string
      vnfInstanceDescription:
        description: >
          Human-readable description of the VNF instance.
          This attribute can be modified with the PATCH method.
        type: string
      vnfdId:
        description: >
          Identifier of the VNFD on which the VNF instance is based. See note 1.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Identifier"
      vnfProvider:
        description: >
          Provider of the VNF and the VNFD. The value is copied from the VNFD.
        type: string
      vnfProductName:
        description: >
          Name to identify the VNF Product. The value is copied from the VNFD.
        type: string
      vnfSoftwareVersion:
        description: >
          Software version of the VNF. The value is copied from the VNFD.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Version"
      vnfdVersion:
        description: >
          Identifies the version of the VNFD. The value is copied from the VNFD.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Version"
      vnfConfigurableProperties:
        description: >
          Additional VNF-specific attributes that provide the current values 
          of the configurable properties of the VNF instance.
          These attributes represent values that are stored persistently in 
          the VnfInstance structure and that correspond to configuration 
          parameters of the VNF instance. 
          Modifying these attributes affects the configuration of the VNF 
          instance either directly (if the VNF instance is in INSTANTIATED 
          state at the time of the modification) or as part of the subsequent 
          VNF instantiation operation (if the VNF instance is in NOT_INSTANTIATED 
          state at the time of the modification).
          Configurable properties referred in these attributes shall be declared 
          in the VNFD. 
          The declaration of configurable properties in the VNFD can optionally 
          contain the specification of initial values. See note 2, note 3 and note 4. The VNFM
          shall reject requests to write configurable properties that are not declared in the
          VNFD with a "422 Unprocessable Content" error response as defined in clause 6.4 of ETSI GS NFV SOL 013.
          These configurable properties include the following standard attributes, 
          which are declared in the VNFD if auto-scaling and/or auto-healing are 
          supported by the VNF: 
            -	isAutoscaleEnabled: If present, the VNF supports auto-scaling. If set 
            to true, auto-scaling is currently enabled. If set to false, auto-scaling 
            is currently disabled.
            -	isAutohealEnabled: If present, the VNF supports auto-healing. If set 
            to true, auto-healing is currently enabled. If set to false, auto-healing 
            is currently disabled.
          These configurable properties can be initialized with default values from the VNFD (see note 4).
          Configurable properties can be modified with values passed in the request structures of certain
          LCM operations, such as the InstantiateVnfRequest structure.
          Further, these configurable properties can be created, modified or deleted with the PATCH method.
          In addition, the provisions in clause 5.7 shall apply.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/KeyValuePairs"
      instantiationState:
        description: >
          The instantiation state of the VNF.
        type: string
        enum:
          - NOT_INSTANTIATED
          - INSTANTIATED
      instantiatedVnfInfo:
        description: >
          Information specific to an instantiated VNF instance. This attribute
          shall be present if the instantiateState attribute value is
          INSTANTIATED.
        type: object
        required:
          - flavourId
          - vnfState
          - extCpInfo
        properties:
          flavourId:
            description: >
              Identifier of the VNF deployment flavour applied to this VNF instance.
            $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/IdentifierInVnfd"
          vnfState:
            description: >
              The state of the VNF instance.
            $ref: "#/definitions/VnfOperationalStateType"
          scaleStatus:
            description: >
              Scale status of the VNF, one entry per aspect. Represents for every
              scaling aspect how "big" the VNF has been scaled w.r.t. that aspect.
              This attribute shall be present if the VNF supports scaling.
              See clause B.2 for an explanation of VNF scaling.
            type: array
            items:
              $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/ScaleInfo"
          maxScaleLevels:
            description: >
              Maximum allowed scale levels of the VNF, one entry per aspect.
              This attribute shall be present if the VNF supports scaling.
            type: array
            items:
              $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/ScaleInfo"
          extCpInfo:
            description: >
              Information about the external CPs exposed by the VNF instance. When trunking is enabled, the list of
              entries includes both, external CPs corresponding to parent ports of a trunk, and external CPs associated
              to sub-ports of a trunk.
            type: array
            minItems: 1
            items:
              $ref: "#/definitions/VnfExtCpInfo"
          vipCpInfo:
            description: >
              VIP CPs that are part of the VNF instance. Shall be present when that particular VIP
              CP of the VNFC instance is associated to an external CP of the VNF instance.

              May be present otherwise.
            type: array
            items:
              $ref: "#/definitions/VipCpInfo"
          extVirtualLinkInfo:
            description: >
              Information about the external VLs the VNF instance is connected to.
            type: array
            items:
              $ref: "#/definitions/ExtVirtualLinkInfo"
          extManagedVirtualLinkInfo:
            description: >
              Information about the externally managed internal VLs of the VNF instance. See note 5 and note 6.
              It is possible to have several ExtManagedVirtualLinkInfo for the same VNF internal VL in case of a
              multi-site VNF spanning several VIMs. The set of ExtManagedVirtualLinkInfo corresponding to the same
              VNF internal VL shall indicate so by referencing to the same VnfVirtualLinkDesc and externally-managed
              multi-site VL instance (refer to clause 5.5.3.5).
              Even though externally-managed internal VLs are also used for VNF-internal connectivity,
              they shall not be listed in the "vnfVirtualLinkResourceInfo" attribute as this would be redundant.
            type: array
            items:
              $ref: "#/definitions/ExtManagedVirtualLinkInfo"
          monitoringParameters:
            description: >
              Active monitoring parameters.
            type: array
            items:
              $ref: "#/definitions/MonitoringParameter"
          localizationLanguage:
            description: >
              Information about localization language of the VNF (includes e.g.
              strings in the VNFD). The localization languages supported by a VNF
              can be declared in the VNFD, and localization language selection can
              take place at instantiation time.
              The value shall comply with the format defined in IETF RFC 5646.
            type: string
          vnfcResourceInfo:
            description: >
              Information about the virtualised compute and storage resources used
              by the VNFCs of the VNF instance.
            type: array
            items:
              $ref: "#/definitions/VnfcResourceInfo"
          vnfVirtualLinkResourceInfo:
            description: >
              Information about the virtualised network resources used by the VLs
              of the VNF instance. See note 6.
              Even though externally-managed internal VLs are also used for VNF-internal connectivity,
              they shall not be listed in the "vnfVirtualLinkResourceInfo" attribute as this would be redundant.
            type: array
            items:
              $ref: "#/definitions/VnfVirtualLinkResourceInfo"
          vnfVirtualStorageResourceInfo:
            description: >
              Information on the virtualised storage resource(s) used as storage for the VNF instance.
            type: array
            items:
              $ref: "#/definitions/VirtualStorageResourceInfo"
          vnfcInfo:
            description: >
              Information about the VNFC instances.
            type: array
            items:
              $ref: "#/definitions/VnfcInfo"
      metadata:
        description: >
          Additional VNF-specific attributes that provide metadata describing the VNF instance.
          These attributes represent values that are stored persistently in the VnfInstance 
          structure for consumption by functional blocks that invoke the VNF lifecycle management 
          interface. They are not consumed by the VNFM, or the lifecycle management scripts.

          Modifying the values of these attributes has no effect on the VNF instance, it only 
          affects the information represented in the VnfInstance structure.
          Metadata that VNF provider foresees shall be declared in the VNFD. The declaration of metadata in
          the VNFD can optionally contain the specification of initial values. See note 2 and note 4. The VNFM shall
          accept requests to write metadata that are not  are declared in the VNFD.

          These attributes can be initialized with default values from VNFD (see note 4) and/or with values
          passed in the CreateVnfRequest structure (see clause 5.5.2.3).

          These attributes can be created, modified or removed with the PATCH method.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/KeyValuePairs"
      extensions:
        description: >
          Additional VNF specific attributes that affect the lifecycle management of this VNF instance.
          These attributes represent values that are stored persistently in the VnfInstance structure for 
          consumption by the VNFM, or by the lifecycle management scripts during the execution of VNF 
          lifecycle management operations.
          
          All extensions that are allowed for the VNF are declared in the VNFD. The declaration of an 
          extension in the VNFD contains information on whether its presence is optional or required, 
          and optionally can specify an initial value. See note 2 and note 4. The VNFM shall reject 
          requests to write extension attributes that are not declared in the VNFD with a "422 Unprocessable 
          Content" error response as defined in clause 6.4 of ETSI GS NFV SOL 013.
          
          Modifying the values of these attributes has no direct effect on the VNF instance; however, the 
          modified attribute values can be considered during subsequent VNF lifecycle management operations, 
          which means that the modified values can indirectly affect the configuration of the VNF instance.
          
          These attributes can be initialized with default values from the VNFD (see note 4).
          
          These attributes can be modified with values passed in the request structures of certain LCM operations, 
          such as the InstantiateVnfRequest structure.
          
          Further, these attributes can be created, modified or deleted with the PATCH method. 
          
          In addition, the provisions in clause 5.7 shall apply.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/KeyValuePairs"
      _links:
        description: >
          Links to resources related to this resource.
        type: object
        required:
          - self
        properties:
          self:
            description: URI of this resource.
            $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Link"
          indicators:
            description: Indicators related to this VNF instance, if applicable.
            $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Link"
          instantiate:
            description: >
              Link to the "Instantiate VNF task" resource, if the related operation
              is possible based on the current status of this VNF instance
              resource (i.e. VNF instance in NOT_INSTANTIATED state).
            $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Link"
          terminate:
            description: >
              Link to the "Terminate VNF task" resource, if the related operation
              is possible based on the current status of this VNF instance
              resource (i.e. VNF instance is in INSTANTIATED state).
            $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Link"
          scale:
            description: >
              Link to the "Scale VNF task" resource, if the related operation is
              supported for this VNF instance, and is possible based on the
              current status of this VNF instance resource (i.e. VNF instance
              is in INSTANTIATED state).
            $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Link"
          scaleToLevel:
            description: >
              Link to the "Scale VNF to Level task" resource, if the related
              operation is supported for this VNF instance, and is possible
              based on the current status of this VNF instance resource
              (i.e. VNF instance is in INSTANTIATED state).
            $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Link"
          changeFlavour:
            description: >
              Link to the "Change VNF flavour task" resource, if the related
              operation is supported for this VNF instance, and is possible
              based on the current status of this VNF instance resource
              (i.e. VNF instance is in INSTANTIATED state).
            $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Link"
          heal:
            description: >
              Link to the "Heal VNF task" resource, if the related operation is
              supported for this VNF instance, and is possible based on the
              current status of this VNF instance resource
              (i.e. VNF instance is in INSTANTIATED state).
            $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Link"
          operate:
            description: >
              Link to the "Operate VNF task" resource, if the related operation is
              supported for this VNF instance, and is possible based on the
              current status of this VNF instance resource
              (i.e. VNF instance is in INSTANTIATED state).
            $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Link"
          changeExtConn:
            description: >
              Link to the "Change external VNF connectivity task" resource, if the related
              operation is possible based on the current status of this VNF
              instance resource (i.e. VNF instance is in INSTANTIATED state).
            $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Link"
          createSnapshot:
            description: >
              Link to the "Create VNF snapshot task" resource, if the related operation is
              supported for this VNF instance and is possible based on the current status of
              this VNF instance resource (i.e., VNF instance is in INSTANTIATED state).
            $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Link"
          revertToSnapshot:
            description: >
              Link to the "Revert to VNF snapshot task" resource, if the related operation is
              supported for this VNF instance and is possible based on the current status of this
              VNF instance resource (i.e., VNF instance is in INSTANTIATED state).
            $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Link"
          changeCurrentVnfPkg:
            description: >
              Link to the "Change current VNF package task" resource, if the related operation is 
              possible based on the current status of this VNF instance resource (i.e. VNF instance is 
              in INSTANTIATED state).
            $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Link"
            
  InstantiateVnfRequest:
    description: >
      This type represents request parameters for the "Instantiate VNF" operation.
      * NOTE: The indication of externally-managed internal VLs is needed in case networks have been
              pre-configured for use with certain VNFs, for instance to ensure that these networks have certain
              properties such as security or acceleration features, or to address particular network topologies.
              The present document assumes that externally-managed internal VLs are managed by the NFVO and
              created towards the VIM.
    type: object
    required:
      - flavourId
    properties:
      flavourId:
        description: >
          Identifier of the VNF deployment flavour to be instantiated.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/IdentifierInVnfd"
      instantiationLevelId:
        description: >
          Identifier of the instantiation level of the deployment flavour to be instantiated. If not present, 
          the default instantiation level as declared in the VNFD is instantiated.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/IdentifierInVnfd"
      extVirtualLinks:
        description: >
          Information about external VLs to connect the VNF to, including configuration information 
          for the CPs via which the VNF instance can attach to this VL.
          The following applies to the "ExtVirtualLinkData" information provided in this request: Even 
          if the VNF is not instantiated in fully scaled-out state, the API consumer shall provide enough 
          CP configuration records to allow connecting the VNF instance, fully scaled out in all scaling 
          aspects, to the external VLs.
        type: array
        items:
          $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/ExtVirtualLinkData"
      extManagedVirtualLinks:
        description: >
          Information about external VLs to connect the VNF to. See note.
        type: array
        items:
          $ref: "#/definitions/ExtManagedVirtualLinkData"
      localizationLanguage:
        description: >
          Localization language of the VNF to be instantiated. The value shall
          comply with the format defined in IETF RFC 5646.
        type: string
      additionalParams:
        description: >
          Additional input parameters for the instantiation process, specific
          to the VNF being instantiated, as declared in the VNFD as part of
          "InstantiateVnfOpConfig" defined in ETSI GS NFV-IFA 011.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/KeyValuePairs"
      extensions:
        description: >
          If present, this attribute provides modifications to the default values, as obtained from the VNFD, of the
          "extensions" attribute in "VnfInstance", as defined in clause 5.5.2.2. Provisions for handling extensions
          during the operation are defined in clause 5.4.4.3.1.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/KeyValuePairs"
      vnfConfigurableProperties:
        description: >
          If present, this attribute provides modifications to the default values, as obtained from the VNFD, of the 
          "vnfConfigurableProperties" attribute in "VnfInstance", as defined in clause 5.5.2.2. 
          Provisions for handling configurable properties during the operation are defined in clause 5.4.4.3.1.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/KeyValuePairs"

  ChangeVnfFlavourRequest:
    description: >
      This type represents request parameters for the "Change VNF flavour" operation.
      * NOTE:	The indication of externally-managed internal VLs is needed in case networks have been
                pre-configured for use with certain VNFs, for instance to ensure that these networks have certain
                properties such as security or acceleration features, or to address particular network topologies.
                The present document assumes that externally-managed internal VLs are managed by the NFVO and
                created towards the VIM.
    type: object
    required:
      - newFlavourId
    properties:
      newFlavourId:
        description: >
          Identifier of the VNF deployment flavour to be instantiated.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/IdentifierInVnfd"
      instantiationLevelId:
        description: >
          Identifier of the instantiation level of the deployment flavour to
          be instantiated. If not present, the default instantiation level as
          declared in the VNFD is instantiated.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/IdentifierInVnfd"
      extVirtualLinks:
        description: >
          Information about external VLs to connect the VNF to, including configuration information 
          for the CPs via which the VNF instance can attach to this VL. 
          Entries in the list of external VLs that are unchanged need not be supplied as part of 
          this request.
          The following applies to the "ExtVirtualLinkData" information provided in this request, together 
          with the related "ExtVirtualLinkInfo" information known to the VNFM represented in the "VnfInstance" 
          structure (see clause 5.5.2.2): Even if the VNF is not in fully scaled-out state after changing the 
          flavour, the API consumer shall provide enough CP configuration records to allow connecting the VNF 
          instance, fully scaled out in all scaling aspects, to the external VLs.
        type: array
        items:
          $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/ExtVirtualLinkData"
      extManagedVirtualLinks:
        description: >
          Information about external VLs to connect the VNF to. See note.
        type: array
        items:
          $ref: "#/definitions/ExtManagedVirtualLinkData"
      additionalParams:
        description: >
          Additional input parameters for the flavour change process, specific to the VNF being modified, as 
          declared in the VNFD as part of "ChangeVnfFlavourOpConfig" defined in ETSI GS NFV-IFA 011.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/KeyValuePairs"
      extensions:
        description: >
          If present, this attribute provides modifications to the values of the "extensions" attribute in "VnfInstance",
          as defined in clause 5.5.2.2. Provisions for handling extensions during the operation, are defined in clause
          5.4.7.3.1.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/KeyValuePairs"
      vnfConfigurableProperties:
        description: >
          If present, this attribute provides modifications to the values of the “vnfConfigurableProperties” attribute in
          "VnfInstance", as defined in clause 5.5.2.2. Provisions for handling VNF configurable properties during the
          operation, are defined in clause 5.4.7.3.1.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/KeyValuePairs"

  TerminateVnfRequest:
    description: >
      This type represents request parameters for the "Terminate VNF" operation.
      * NOTE:	In case of forceful termination, the VNF instance is terminated immediately.
                If the VNF is still in service, this can adversely impact the network service,
                and therefore, the EM needs to determine if forceful termination is applicable
                in the particular situation.
    type: object
    required:
      - terminationType
    properties:
      terminationType:
        description: >
          Indicates the type of termination is requested. See note.
          Permitted values:
          * FORCEFUL: The VNFM will shut down the VNF and release the resources immediately after accepting the request.
          * GRACEFUL: The VNFM will first arrange to take the VNF out of service after accepting the request. Once the
            operation of taking the VNF out of service finishes (irrespective of whether it has succeeded or failed) or
            once the timer value specified in the "gracefulTerminationTimeout" attribute expires, the VNFM will shut down
            the VNF and release the resources.
        type: string
        enum:
          - FORCEFUL
          - GRACEFUL
      gracefulTerminationTimeout:
        description: >
          This attribute is only applicable in case of graceful termination. It defines the time to wait for the VNF to be
          taken out of service before shutting down the VNF and releasing the resources.
          The unit is seconds. If not given and the "terminationType" attribute is set to "GRACEFUL", it is expected that
          the VNFM waits for the successful taking out of service of the VNF, no matter how long it takes, before shutting
          down the VNF and releasing the resources.
        type: integer
      additionalParams:
        description: >
          Additional parameters passed by the EM as input to the termination process, specific to the VNF being terminated, 
          as declared in the VNFD as part of "TerminateVnfOpConfig" defined in ETSI GS NFV-IFA 011.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/KeyValuePairs"

  HealVnfRequest:
    type: object
    properties:
      vnfcInstanceId:
        description: >
          List of identifiers of VNFC instances for which a healing action is requested. Each identifier references the
          "id" attribute in a "VnfcInfo" structure. Cardinality can be "0" to denote that the request applies to the
          whole VNF and not a specific VNFC instance.
        type: array
        items:
          $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Identifier"
      cause:
        description: >
          Indicates the reason why a healing procedure is required.
        type: string
      additionalParams:
        description: >
          Additional parameters passed by the EM as input to the healing process, specific to the VNF being healed as 
          declared in the VNFD as part of "HealVnfOpConfig" defined in ETSI GS NFV-IFA 011.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/KeyValuePairs"
      healScript:
        description: >
          Provides link to a script that should be executed as part
          of the healing action or a set of rules for healing procedure.
        type: string

  OperateVnfRequest:
    description: >
      This type represents request parameters for the "Operate VNF" operation.
      * NOTE:	The "stopType" and "gracefulStopTimeout" attributes shall be absent, when the "changeStateTo"
                attribute is equal to "STARTED". The "gracefulStopTimeout" attribute shall be present, when the
                "changeStateTo" is equal to "STOPPED" and the "stopType" attribute is equal to "GRACEFUL".
                The "gracefulStopTimeout" attribute shall be absent, when the "changeStateTo" attribute is equal to
                "STOPPED" and the "stopType" attribute is equal to "FORCEFUL". The request shall be treated as if
                the "stopType" attribute has been set to "FORCEFUL", when the "changeStateTo" attribute is equal
                to "STOPPED" and the "stopType" attribute is absent.
    type: object
    required:
      - changeStateTo
    properties:
      vnfcInstanceId:
        description: >
          List of identifiers of VNFC instances. Each identifier references the "id" attribute in a "VnfcInfo" structure.
          Cardinality can be "0" to denote that the request applies to the whole VNF and not a specific VNFC instance.
        type: array
        items:
          $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Identifier"
      changeStateTo:
        description: >
          The desired operational state (i.e. started or stopped) to change
          the VNF to.
        $ref: "#/definitions/VnfOperationalStateType"
      stopType:
        description: >
          It signals whether forceful or graceful stop is requested. See note
        type: string
        enum:
          - FORCEFUL
          - GRACEFUL
      gracefulStopTimeout:
        description: >
          The time interval (in seconds) to wait for the VNF to be taken out of service during graceful stop,
          before stopping the VNF. See note.
        type: integer
      additionalParams:
        description: >
          Additional parameters passed by the EM as input to the process, specific to the VNF of which the operation 
          status is changed, as declared in the VNFD as part of "OperateVnfOpConfig" defined in ETSI GS NFV-IFA 011.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/KeyValuePairs"

  ChangeExtVnfConnectivityRequest:
    description: >
      This type represents request parameters for the
      "Change external VNF connectivity" operation to modify the external
      connectivity of a VNF instance.
    type: object
    required:
      - extVirtualLinks
    properties:
      extVirtualLinks:
        description: >
          Information about external VLs to change (e.g. connect the VNF to) including configuration information 
          for the CPs via which the VNF instance can attach to this VL.
          Entries in the list of external VLs that are unchanged need not be supplied as part of this request.
          The following applies to the "ExtVirtualLinkData" information provided in this request, together with the
          related "ExtVirtualLinkInfo" information known to the VNFM represented in the "VnfInstance" structure (see
          clause 5.5.2.2): Even if the VNF is not in fully scaled-out state, the API consumer shall provide enough CP
          configuration records to allow connecting the VNF instance, fully scaled out in all scaling aspects, to the
          external VLs.
        type: array
        items:
          $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/ExtVirtualLinkData"
      additionalParams:
        description: >
          Additional parameters passed by the EM as input to the process, specific to the VNF of which the 
          external connectivity is changed, as declared in the VNFD as part of "ChangeExtVnfConnectivityOpConfig" 
          defined in ETSI GS NFV-IFA 011.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/KeyValuePairs"

  ChangeCurrentVnfPkgRequest:
    description: >
      This type represents request parameters for the "Change current VNF package" operation to replace the VNF package
      on which a VNF instance is based.
      * NOTE:	The indication of externally-managed internal VLs is needed in case networks have been
                pre-configured for use with certain VNFs, for instance to ensure that these networks have certain
                properties such as security or acceleration features, or to address particular network topologies.
                The present document assumes that externally-managed internal VLs are managed by the NFVO and created
                towards the VIM.
    type: object
    required:
      - vnfdId
    properties:
      vnfdId:
        description: >
          Identifier of the VNFD which defines the destination VNF Package for the change.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Identifier"
      extVirtualLinks:
        description: >
          Information about external VLs to connect the VNF to,  including configuration information for
          the CPs via which the VNF instance can attach to this VL.
          Entries in the list that are unchanged need not be supplied as part of this request.
          The following applies to the "ExtVirtualLinkData" information provided in this request, together
          with the related "ExtVirtualLinkInfo" information known to the VNFM represented in the
          "VnfInstance" structure (see clause 5.5.2.2): Even if the VNF is not in fully scaled-out state
          after the change of the VNF package, the API consumer shall provide enough CP configuration
          records to allow connecting the VNF instance, fully scaled out in all scaling aspects, to the
          external VLs.
        type: array
        items:
          $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/ExtVirtualLinkData"
      extManagedVirtualLinks:
        description: >
          Information about internal VLs that are managed by other entities than the VNFM. See note.
        type: array
        items:
          $ref: "#/definitions/ExtManagedVirtualLinkData"
      additionalParams:
        description: >
          Additional parameters passed by the EM as input to the process, specific to the VNF of which the underlying
          VNF package is changed, as declared in the VNFD as part of "ChangeCurrentVnfPkgOpConfig" defined in ETSI GS NFV-IFA 011.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/KeyValuePairs"
      extensions:
        description: >
          If present, this attribute provides modifications to the values of the "extensions" attribute in "VnfInstance",
          as defined in clause 5.5.2.2. Provisions for handling extensions during the operation, and needed passed
          parameter values in case of conflicts, are defined in clause 5.4.11a.3.1.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/KeyValuePairs"
      vnfConfigurableProperties:
        description: >
          If present, this attribute provides modifications to the values of the “vnfConfigurableProperties” attribute
          in "VnfInstance", as defined in clause 5.5.2.2. Provisions for handling VNF configurable properties during the
          operation, and needed passed parameter values in case of conflicts, are defined in clause 5.4.11a.3.1.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/KeyValuePairs"

  VnfInfoModificationRequest:
    description: >
      This type represents attribute modifications for an "Individual VNF instance" resource,
      i.e. modifications to a resource representation based on the "VnfInstance" data type.
      The attributes of "VnfInstance" that can be modified according to the provisions in clause 5.5.2.2
      are included in the "VnfInfoModificationRequest" data type.
    type: object
    properties:
      vnfInstanceName:
        description: >
          New value of the "vnfInstanceName" attribute in "VnfInstance", or "null" to remove the attribute.
        type: string
      vnfInstanceDescription:
        description: >
          New value of the "vnfInstanceDescription" attribute in "VnfInstance", or "null" to remove the attribute.
        type: string
      vnfdId:
        description: >
          New value of the "vnfdId" attribute in "VnfInstance". The value "null" is not permitted.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Identifier"
      vnfConfigurableProperties:
        description: >
          Modifications of the "vnfConfigurableProperties" attribute in "VnfInstance".
          If present, these modifications shall be applied according to the rules of
          JSON Merge PATCH (see IETF RFC 7396 [15]).
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/KeyValuePairs"
      metadata:
        description: >
          Modifications of the "metadattametadata" attribute in "VnfInstance".
          If present, these modifications shall be applied according to the rules of
          JSON Merge PATCH (see IETF  RFC  7396  [15]).
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/KeyValuePairs"
      extensions:
        description: >
          Modifications of the "extensions" attribute in "VnfInstance".
          If present, these modifications shall be applied according to the rules of
          JSON Merge PATCH (see IETF  RFC  7396  [15]).
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/KeyValuePairs"
      vnfcInfoModifications:
        description: >
          Modifications of certain entries in the "vnfcInfo" attribute array in the
          "instantiatedVnfInfo" attribute of "VnfInstance" to be used as "newList" as defined below this table.
          The following provisions shall apply when modifying an attribute that is an array of objects of type
          "VnfcInfo" by supplying an array of objects of type "VnfcInfoModifications".
          Assumptions:
          1)  "oldList" is the "VnfcInfo" array to be modified and "newList" is the "VnfcInfoModifications"
              array that contains the changes.
          2)  "oldEntry" is an entry in "oldList" and "newEntry" is an entry in "newList".
          3)  A "newEntry" has a "corresponding entry" if there exists an "oldEntry" that has the same content
              of the "id" attribute as the "newEntry"; a "newEntry" has no corresponding entry if no such "oldEntry" exists.
          4)  In any array of "VnfcInfo" resp. "VnfcInfoModifications" structures, the content of "id" is unique
              (i.e. there are no two entries with the same content of "id").
          Provisions:
          1)  For each "newEntry" in "newList" that has no corresponding entry in "oldList",
              the "oldList" array shall be modified by adding that "newEntry".
          2)  For each "newEntry" in "newList" that has a corresponding "oldEntry" in "oldList",
              the value of "oldEntry" shall be updated with the content of "newEntry" as specified for
              the data type of "newEntry (refer to clause 5.5.3.24 for the data type "VnfcInfoModifications").
        type: array
        items:
          $ref: "#/definitions/VnfcInfoModifications"

  CreateVnfSnapshotRequest:
    description: >
      This type represents request parameters for the "Create VNF Snapshot" LCM operation.
    type: object
    required:
      - vnfSnapshotResId
    properties:
      vnfSnapshotInfoId:
        description: >
          Identifier of the individual VNF snapshot resource to which the VNF Snapshot is to be associated.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Identifier"
      vnfcInstanceId:
        description: >
          Identifier of the VNFC instance to be snapshotted. Each identifier references the "id" attribute in a
          "VnfcInfo" structure. If this attribute is provided, only a snapshot of the referred VNFC instance shall
          be created.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/IdentifierInVnf"
      additionalParams:
        description: >
          Additional input parameters for the snapshot creation process, specific for the VNF being “snapshotted”,
          as declared in the VNFD as part of "CreateSnapshotVnfOpConfig" defined in ETSI GS NFV-IFA 011.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/KeyValuePairs"
      userDefinedData:
        description: >
          User defined data for the VNF snapshot.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/KeyValuePairs"

  RevertToVnfSnapshotRequest:
    description: >
      This type represents request parameters for the "Revert-to VNF Snapshot" operation.
    type: object
    properties:
      vnfSnapshotInfoId:
        description: >
          Identifier of the “individual VNF snapshot” resource with the information of the VNF snapshot to be reverted to.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Identifier"
      vnfcInstanceId:
        description: >
          List of identifiers of the VNFC instance to be reverted. Each identifier references the "id" attribute in a
          "VnfcInfo" structure. Shall be present if the request is for reverting a specific VNFC instance.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Identifier"
      vnfcSnapshotInfoId:
        description: >
          Identifier of the VNFC snapshot information with the information of the VNFC snapshot to be reverted to.
          Shall only be present if the "vnfcInstanceId" is present.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Identifier"
      additionalParams:
        description: >
          Additional input parameters for the revert to VNF snapshot process, specific for the VNF being “reverted”,
          as declared in the VNFD as part of “RevertToSnapshotVnfOpConfig” defined in ETSI GS NFV-IFA 011.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/KeyValuePairs"

  CreateVnfSnapshotInfoRequest:
    description: |
      This type represents request parameters for the creation of an "Individual VNF snapshot" resource which can be
      populated with content obtained by invoking the "Create VNF snapshot" LCM operation or extracted from a VNF
      snapshot package.
      * NOTE: The present attribute shall be provided if the "Individual VNF snapshot" resource
              is requested to be created and be filled from a VNF snapshot package extraction.
    type: object
    properties:
      vnfSnapshotPkgId:
        description: |
          Identifier of the VNF snapshot package information held by the NFVO. See note.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Identifier"

  VnfSnapshotInfo:
    description: >
      This type represents an individual VNF snapshot resource.
    type: object
    required:
      - id
    properties:
      id:
        description: >
          Identifier of the individual VNF snapshot resource. This identifier is allocated by the VNFM.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Identifier"
      vnfSnapshotPkgId:
        description: |
          Identifier of the VNF snapshot package information held by the EM. Shall be present when the
          “Individual VNF snapshot" resource is created from a VNF snapshot package extraction.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Identifier"
      vnfSnapshot:
        description: >
          Information about the VNF snapshot, content and/or references to its content. Shall be present when the
          individual VNF snapshot resource is associated to a VNF snapshot created via the corresponding "Create VNF
          snapshot" task resource or extracted from a VNF snapshot package.
        $ref: '#/definitions/VnfSnapshot'
      _links:
        description: >
          Links to resources related to this resource.
        type: object
        required:
          - self
        properties:
          self:
            description: >
              URI of this resource.
            $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Link"
          takenFrom:
            description: >
              Link to the VNF instance from which this snapshot was taken. Shall be present when the "Individual VNF
              snapshot" resource is associated to a VNF snapshot created via the corresponding "Create VNF snapshot"
              task resource.
            $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Link"

  VnfSnapshot:
    description: >
      This type represents a VNF snapshot.
    type: object
    required:
      - id
      - vnfInstanceId
      - triggeredAt
      - vnfdId
      - vnfInfo
      - vnfcSnapshots
    properties:
      id:
        description: >
          Identifier of the VNF Snapshot. This identifier is allocated by the VNFM.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Identifier"
      vnfInstanceId:
        description: >
          Identifier of the snapshotted VNF instance.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Identifier"
      creationStartedAt:
        description: >
          Timestamp indicating when the VNF snapshot creation has been started by the VNFM.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/DateTime"
      creationFinishedAt:
        description: >
          Timestamp indicating when the VNF snapshot has been completed by the VNFM.
          Shall be present once the VNF snapshot creation has been completed.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/DateTime"
      vnfdId:
        description: >
          Identifier of the VNFD in use at the time the snapshot of the VNF instance has been created.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Identifier"
      vnfInstance:
        description: >
          VNF Instance information of the snapshotted VNF instance. This is a copy of the individual VNF instance resource.
        $ref: '#/definitions/VnfInstance'
      vnfcSnapshots:
        description: >
          Information about VNFC snapshots constituting this VNF snapshot.
        type: array
        items:
          $ref: '#/definitions/VnfcSnapshotInfo'
      userDefinedData:
        description: >
          User defined data for the VNF snapshot.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/KeyValuePairs"

  VnfcSnapshotInfo:
    description: >
      This type represents a VNFC snapshot.
      * NOTE 1:	The identifier of the compute snapshot resource is assigned during creation of a VNFC
                snapshot being returned from the VIM as output data in the response message of the individual
                resource operations. This attribute shall only be present for a VNFC snapshot that has been
                newly created by the VNFM as a result of the "Create VNF snapshot task".
        NOTE 2:	The identifier of the storage snapshot resource is assigned during creation of a VNFC snapshot
                being returned from the VIM as output data in the response message of the individual resource
                operations. This attribute shall only be present for a VNFC snapshot with an associated storage
                resource and that has been newly created by the VNFM as a result of the "Create VNF snapshot task".
    type: object
    required:
      - id
      - vnfcInstanceId
      - creationStartedAt
      - vnfcResourceInfoId
    properties:
      id:
        description: >
          Identifier of the information held by the VNFM about a specific VNFC snapshot. This identifier is allocated by
          the VNFM and is unique within the scope of a VNF snapshot.
          The attribute also identifies the compute snapshot image associated
          to this VNFC snapshot within the context of a referred VNF snapshot.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Identifier"
      vnfcInstanceId:
        description: >
          Identifier of the snapshotted VNFC instance.
          The  identifier references the "id" attribute in a "VnfcInfo" structure.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/IdentifierInVnf"
      creationStartedAt:
        description: >
          Timestamp indicating when the VNF snapshot creation has been started by the VNFM.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/DateTime"
      creationFinishedAt:
        description: >
          Timestamp indicating when the VNFC snapshot has been completed. Shall be present once the VNFC snapshot
          creation has been completed by the VNFM.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/DateTime"
      vnfcResourceInfoId:
        description: >
          Reference to the "VnfcResourceInfo" structure in the "VnfInstance" structure that represents the resources of
          the snapshotted VNFC instance. A snapshot of that structure is available in the "vnfInstance" attribute of the
          "VnfSnapshot" structure.
        $ref: "#/definitions/VnfcInfo"
      computeSnapshotResource:
        description: >
          Reference to a compute snapshot resource. See note 1.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/ResourceHandle"
      storageSnapshotResources:
        description: >
          Mapping of the storage resources associated to the VNFC with the storage snapshot resources.
        type: object
        required:
          - storageResourceId
        properties:
          storageResourceId:
            description: >
              Reference to the "VirtualStorageResourceInfo" structure in the "VnfInstance" structure that represents
              the virtual storage resource. The attribute also identifies the storage snapshot image
              associated to this VNFC snapshot within the context of a referred VNF snapshot
            $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/IdentifierInVnf"
          storageSnapshotResource:
            description: >
              Reference to a storage snapshot resource. See note 2.
            $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/ResourceHandle"
      userDefinedData:
        description: >
          User defined data for the VNF snapshot.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/KeyValuePairs"

  StopType:
    description: >
      The enumeration StopType.
      * FORCEFUL: The VNFM will stop the VNF instance or VNFC instance(s) immediately after accepting the request.
      * GRACEFUL: The VNFM will first arrange to take the VNF instance or VNFC instance(s) out of service after accepting
                  the request. Once that operation is successful or once the timer value specified in the "gracefulStopTimeout"
                  attribute expires, the VNFM will stop the VNF instance or VNFC instance(s).
    type: string
    enum:
      - FORCEFUL
      - GRACEFUL

  ExtManagedVirtualLinkData:
    description: >
      This type represents an externally-managed internal VL.
      * NOTE:	The information about the VIM connection referenced by the VIM connection id is known to the VNFM.
                Moreover, the identifier of the VIM connection provides scope to the resourceId.
    type: object
    required:
      - id
      - virtualLinkDescId
      - resourceId
    properties:
      id:
        description: >
          The identifier of the externally-managed internal VL instance. The
          identifier is assigned by the NFV-MANO entity that manages this VL
          instance.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/Identifier"
      vnfVirtualLinkDescId:
        description: >
          The identifier of the VLD in the VNFD for this VL.
        $ref: "../../General_Definitions/SOL002_def.yaml#/definitions/IdentifierInVnfd"
      vimConnectionId:
        description: >