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+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+
+.. _northbound_API:
+
+Detailed northbound interface specification
+===========================================
+
+.. Note::
+ This is Work in Progress.
+
+ETSI NFV IFA Information Models
+-------------------------------
+
+Compute Flavor
+^^^^^^^^^^^^^^
+
+A compute flavor includes information about number of virtual CPUs, size of
+virtual memory, size of virtual storage, and virtual network interfaces
+[NFVIFA005]_.
+
+.. figure:: images/computeflavor.png
+ :name: computeflavor
+ :width: 90%
+
+Virtualised Compute Resources
+-----------------------------
+
+Compute Capacity Management
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Subscribe Compute Capacity Change Event
+"""""""""""""""""""""""""""""""""""""""
+
+Subscription from Consumer to VIM to be notified about compute capacity changes
+
+.. http:post:: /capacity/compute/subscribe
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ POST /capacity/compute/subscribe HTTP/1.1
+ Accept: application/json
+
+ {
+ "zoneId": "12345",
+ "computeResourceTypeId": "vcInstances",
+ "threshold": {
+ "thresholdType" : "absoluteValue",
+ "threshold": {
+ "capacity_info": "available",
+ "condition": "lt",
+ "value": 5
+ }
+ }
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 201 CREATED
+ Content-Type: application/json
+
+ {
+ "created": "2015-09-21T00:00:00Z",
+ "capacityChangeSubscriptionId": "abcdef-ghijkl-123456789"
+ }
+
+ :statuscode 400: computeResourceTypeId is missing
+
+Query Compute Capacity for a defined resource type
+""""""""""""""""""""""""""""""""""""""""""""""""""
+
+Request to find out about available, reserved, total and allocated compute
+capacity.
+
+.. http:get:: /capacity/compute/query
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ GET /capacity/compute/query HTTP/1.1
+ Accept: application/json
+
+ {
+ "zoneId": "12345",
+ "computeResourceTypeId": "vcInstances",
+ "timePeriod": {
+ "startTime": "2015-09-21T00:00:00Z",
+ "stopTime": "2015-09-21T00:05:30Z"
+ }
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 200 OK
+ Content-Type: application/json
+
+ {
+ "zoneId": "12345",
+ "lastUpdate": "2015-09-21T00:03:20Z",
+ "capacityInformation": {
+ "available": 4,
+ "reserved": 17,
+ "total": 50,
+ "allocated": 29
+ }
+ }
+
+ :query limit: Default is 10.
+ :statuscode 404: resource zone unknown
+
+
+Query Compute Capacity with required attributes
+"""""""""""""""""""""""""""""""""""""""""""""""
+Request to find out available compute capacity with given characteristics
+
+.. http:get:: /capacity/compute/query
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ GET /capacity/compute/query HTTP/1.1
+ Accept: application/json
+
+ {
+ "zoneId": "12345",
+ "resourceCriteria": {
+ "virtualCPU": {
+ "cpuArchitecture": "x86",
+ "numVirtualCpu": 8
+ }
+ },
+ "attributeSelector": "available",
+ "timePeriod": {
+ "startTime": "2015-09-21T00:00:00Z",
+ "stopTime": "2015-09-21T00:05:30Z"
+ }
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 200 OK
+ Content-Type: application/json
+
+ {
+ "zoneId": "12345",
+ "lastUpdate": "2015-09-21T00:03:20Z",
+ "capacityInformation": {
+ "available": 50
+ }
+ }
+
+ :query limit: Default is 10.
+ :statuscode 404: resource zone unknown
+
+Notify Compute Capacity Change Event
+""""""""""""""""""""""""""""""""""""
+
+Notification about compute capacity changes
+
+.. http:post:: /capacity/compute/notification
+ :noindex:
+
+ **Example notification**:
+
+ .. sourcecode:: http
+
+ Content-Type: application/json
+
+ {
+ "zoneId": "12345",
+ "notificationId": "zyxwvu-tsrqpo-987654321",
+ "capacityChangeTime": "2015-09-21T00:03:20Z",
+ "resourceDescriptor": {
+ "computeResourceTypeId": "vcInstances"
+ },
+ "capacityInformation": {
+ "available": 4,
+ "reserved": 17,
+ "total": 50,
+ "allocated": 29
+ }
+ }
+
+Compute Resource Reservation
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Create Compute Resource Reservation
+"""""""""""""""""""""""""""""""""""
+
+Request the reservation of compute resource capacity
+
+.. http:post:: /reservation/compute/create
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ POST /reservation/compute/create HTTP/1.1
+ Accept: application/json
+
+ {
+ "startTime": "2015-09-21T01:00:00Z",
+ "computePoolReservation": {
+ "numCpuCores": 20,
+ "numVcInstances": 5,
+ "virtualMemSize": 10
+ }
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 201 CREATED
+ Content-Type: application/json
+
+ {
+ "reservationData": {
+ "startTime": "2015-09-21T01:00:00Z",
+ "reservationStatus": "initialized",
+ "reservationId": "xxxx-yyyy-zzzz",
+ "computePoolReserved": {
+ "numCpuCores": 20,
+ "numVcInstances": 5,
+ "virtualMemSize": 10,
+ "zoneId": "23456"
+ }
+ }
+ }
+
+or virtualization containers
+
+.. http:post:: reservation/compute/create
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ POST /reservation/compute/create HTTP/1.1
+ Accept: application/json
+
+ {
+ "startTime": "2015-10-05T15:00:00Z",
+ "virtualizationContainerReservation": [
+ {
+ "containerId": "myContainer",
+ "containerFlavor": {
+ "flavorId": "myFlavor",
+ "virtualCpu": {
+ "numVirtualCpu": 2,
+ "cpuArchitecture": "x86"
+ },
+ "virtualMemory": {
+ "numaEnabled": "False",
+ "virtualMemSize": 16
+ },
+ "storageAttributes": {
+ "typeOfStorage": "volume",
+ "sizeOfStorage": 16
+ }
+ }
+ }
+ ]
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 201 CREATED
+ Content-Type: application/json
+
+ {
+ "reservationData": {
+ "startTime": "2015-10-05T15:00:00Z",
+ "reservationId": "aaaa-bbbb-cccc",
+ "reservationStatus": "initialized",
+ "virtualizationContainerReserved": [
+ {
+ "containerId": "myContainer",
+ "flavorId": "myFlavor",
+ "virtualCpu": {
+ "numVirtualCpu": 2,
+ "cpuArchitecture": "x86"
+ },
+ "virtualMemory": {
+ "numaEnabled": "False",
+ "virtualMemSize": 16
+ },
+ "virtualDisks": {
+ "storageId": "myStorage",
+ "flavourId": "myStorageFlavour",
+ "typeOfStorage": "volume",
+ "sizeOfStorage": 16,
+ "operationalState": "enabled"
+ }
+ }
+ ]
+ }
+ }
+
+
+
+Query Compute Resource Reservation
+""""""""""""""""""""""""""""""""""
+
+Request to find out about reserved compute resources that the consumer has
+access to.
+
+.. http:get:: /reservation/compute/query
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ GET /reservation/compute/query HTTP/1.1
+ Accept: application/json
+
+ {
+ "queryReservationFilter": [
+ {
+ "reservationId": "xxxx-yyyy-zzzz"
+ }
+ ]
+
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 200 OK
+ Content-Type: application/json
+
+ {
+ "queryResult":
+ {
+ "startTime": "2015-09-21T01:00:00Z",
+ "reservationStatus": "active",
+ "reservationId": "xxxx-yyyy-zzzz",
+ "computePoolReserved":
+ {
+ "numCpuCores": 20,
+ "numVcInstances": 5,
+ "virtualMemSize": 10,
+ "zoneId": "23456"
+ }
+ }
+ }
+
+ :statuscode 404: reservation id unknown
+
+Update Compute Resource Reservation
+"""""""""""""""""""""""""""""""""""
+
+Request to update compute resource reservation
+
+.. http:post:: /reservation/compute/update
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ POST /reservation/compute/update HTTP/1.1
+ Accept: application/json
+
+ {
+ "startTime": "2015-09-14T16:00:00Z",
+ "reservationId": "xxxx-yyyy-zzzz"
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 201 CREATED
+ Content-Type: application/json
+
+ {
+ "reservationData": {
+ "startTime": "2015-09-14TT16:00:00Z",
+ "reservationStatus": "active",
+ "reservationId": "xxxx-yyyy-zzzz",
+ "computePoolReserved": {
+ "numCpuCores": 20,
+ "numVcInstances": 5,
+ "virtualMemSize": 10,
+ "zoneId": "23456"
+ }
+ }
+ }
+
+Terminate Compute Resource Reservation
+""""""""""""""""""""""""""""""""""""""
+
+Request to terminate a compute resource reservation
+
+.. http:delete:: /reservation/compute/(reservation_id)
+ :noindex:
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 200
+ Content-Type: application/json
+
+ {
+ "reservationId": "xxxx-yyyy-zzzz",
+ }
+
+
+Subscribe Resource Reservation Change Event
+"""""""""""""""""""""""""""""""""""""""""""
+
+Subscription from Consumer to VIM to be notified about changes
+related to a reservation or to the resources associated to it.
+
+.. http:post:: /reservation/subscribe
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ POST /reservation/subscribe HTTP/1.1
+ Accept: application/json
+
+ {
+ "inputFilter": [
+ {
+ "reservationId": "xxxx-yyyy-zzzz",
+ }
+ ]
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 201 CREATED
+ Content-Type: application/json
+
+ {
+ "created": "2015-09-21T00:00:00Z",
+ "reservationChangeSubscriptionId": "abcdef-ghijkl-123456789"
+ }
+
+ :statuscode 400: inputFilter is missing
+
+
+Notify Resource Reservation Change Event
+""""""""""""""""""""""""""""""""""""""""
+
+Notification about changes in a compute resource reservation
+
+.. http:post:: /capacity/compute/notification
+ :noindex:
+
+ **Example notification**:
+
+ .. sourcecode:: http
+
+ Content-Type: application/json
+
+ {
+ "changeId": "aaaaaa-btgxxx-987654321",
+ "reservationId": "xxxx-yyyy-zzzz",
+ "vimId": "vim-CX-03"
+ "changeType": "Reservation time change"
+ "changedReservationData": {
+ "endTime": "2015-10-14TT16:00:00Z",
+ }
+ }
+
+
+
+Virtualised Network Resources
+-----------------------------
+
+Network Capacity Management
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Subscribe Network Capacity Change Event
+"""""""""""""""""""""""""""""""""""""""
+
+Susbcription from Consumer to VIM to be notified about network capacity changes
+
+.. http:post:: /capacity/network/subscribe
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ POST /capacity/network/subscribe HTTP/1.1
+ Accept: application/json
+
+ {
+ "networkResourceTypeId": "publicIps",
+ "threshold": {
+ "thresholdType": "absoluteValue",
+ "threshold": {
+ "capacity_info": "available",
+ "condition": "lt",
+ "value": 5
+ }
+ }
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 201 CREATED
+ Content-Type: application/json
+
+ {
+ "created": "2015-09-28T00:00:00Z",
+ "capacityChangeSubscriptionId": "bcdefg-hijklm-234567890"
+ }
+
+Query Network Capacity
+""""""""""""""""""""""
+
+Request to find out about available, reserved, total and allocated network
+capacity.
+
+.. http:get:: /capacity/network/query
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ GET /capacity/network/query HTTP/1.1
+ Accept: application/json
+
+ {
+ "networkResourceTypeId": "publicIps",
+ "timePeriod": {
+ "startTime": "2015-09-28T00:00:00Z",
+ "stopTime": "2015-09-28T00:05:30Z"
+ }
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 200 OK
+ Content-Type: application/json
+
+ {
+ "lastUpdate": "2015-09-28T00:02:10Z",
+ "capacityInformation": {
+ "available": 4,
+ "reserved": 10,
+ "total": 64,
+ "allocated": 50
+ }
+ }
+
+Notify Network Capacity Change Event
+""""""""""""""""""""""""""""""""""""
+
+Notification about network capacity changes
+
+.. http:post:: /capacity/network/notification
+ :noindex:
+
+ **Example notification**:
+
+ .. sourcecode:: http
+
+ Content-Type: application/json
+
+ {
+ "notificationId": "yxwvut-srqpon-876543210",
+ "capacityChangeTime": "2015-09-28T00:02:10Z",
+ "resourceDescriptor": {
+ "networkResourceTypeId": "publicIps"
+ },
+ "capacityInformation": {
+ "available": 4,
+ "reserved": 10,
+ "total": 64,
+ "allocated": 50
+ }
+ }
+
+Network Resource Reservation
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Create Network Resource Reservation
+"""""""""""""""""""""""""""""""""""
+
+Request the reservation of network resource capacity and/or virtual networks,
+network ports
+
+.. http:post:: /reservation/network/create
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ POST /reservation/network/create HTTP/1.1
+ Accept: application/json
+
+ {
+ "startTime": "2015-09-28T01:00:00Z",
+ "networkReservation": {
+ "numPublicIps": 2
+ }
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 201 CREATED
+ Content-Type: application/json
+
+ {
+ "reservationData": {
+ "startTime": "2015-09-28T01:00:00Z",
+ "reservationStatus": "initialized",
+ "reservationId": "wwww-xxxx-yyyy",
+ "publicIps": [
+ "10.2.91.60",
+ "10.2.91.61"
+ ]
+ }
+ }
+
+Query Network Resource Reservation
+""""""""""""""""""""""""""""""""""
+
+Request to find out about reserved network resources that the consumer has
+access to.
+
+.. http:get:: /reservation/network/query
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ GET /reservation/network/query HTTP/1.1
+ Accept: application/json
+
+ {
+ "queryReservationFilter": [
+ {
+ "reservationId": "wwww-xxxx-yyyy"
+ }
+ ]
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 200 OK
+ Content-Type: application/json
+
+ {
+ "queryResult": {
+ "startTime": "2015-09-28T01:00:00Z",
+ "reservationStatus": "active",
+ "reservationId": "wwww-xxxx-yyyy",
+ "publicIps": [
+ "10.2.91.60",
+ "10.2.91.61"
+ ]
+ }
+ }
+
+Update Network Resource Reservation
+"""""""""""""""""""""""""""""""""""
+
+Request to update network resource reservation
+
+.. http:post:: /reservation/network/update
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ POST /reservation/network/update HTTP/1.1
+ Accept: application/json
+
+ {
+ "startTime": "2015-09-21T16:00:00Z",
+ "reservationId": "wwww-xxxx-yyyy"
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 201 CREATED
+ Content-Type: application/json
+
+ {
+ "reservationData": {
+ "startTime": "2015-09-21T16:00:00Z",
+ "reservationStatus": "active",
+ "reservationId": "wwww-xxxx-yyyy",
+ "publicIps": [
+ "10.2.91.60",
+ "10.2.91.61"
+ ]
+ }
+ }
+
+Terminate Network Resource Reservation
+""""""""""""""""""""""""""""""""""""""
+
+Request to terminate a network resource reservation
+
+.. http:delete:: /reservation/network/(reservation_id)
+ :noindex:
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 200
+ Content-Type: application/json
+
+ {
+ "reservationId": "xxxx-yyyy-zzzz",
+ }
+
+Virtualised Storage Resources
+-----------------------------
+
+Storage Capacity Management
+^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Subscribe Storage Capacity Change Event
+"""""""""""""""""""""""""""""""""""""""
+
+Subscription from Consumer to VIM to be notified about storage capacity changes
+
+.. http:post:: /capacity/storage/subscribe
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ POST /capacity/storage/subscribe HTTP/1.1
+ Accept: application/json
+
+ {
+ "storageResourceTypeId": "volumes",
+ "threshold": {
+ "thresholdType": "absoluteValue",
+ "threshold": {
+ "capacity_info": "available",
+ "condition": "lt",
+ "value": 3
+ }
+ }
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 201 CREATED
+ Content-Type: application/json
+
+ {
+ "created": "2015-09-28T12:00:00Z",
+ "capacityChangeSubscriptionId": "cdefgh-ijklmn-345678901"
+ }
+
+Query Storage Capacity for a defined resource type
+""""""""""""""""""""""""""""""""""""""""""""""""""
+
+Request to find out about available, reserved, total and allocated storage
+capacity.
+
+.. http:get:: /capacity/storage/query
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ GET /capacity/storage/query HTTP/1.1
+ Accept: application/json
+
+ {
+ "storageResourceTypeId": "volumes",
+ "timePeriod": {
+ "startTime": "2015-09-28T12:00:00Z",
+ "stopTime": "2015-09-28T12:04:45Z"
+ }
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 200 OK
+ Content-Type: application/json
+
+ {
+ "lastUpdate": "2015-09-28T12:01:35Z",
+ "capacityInformation": {
+ "available": 2,
+ "reserved": 4,
+ "total": 10,
+ "allocated": 4
+ }
+ }
+
+Query Storage Capacity with required attributes
+"""""""""""""""""""""""""""""""""""""""""""""""
+
+Request to find out available capacity.
+
+.. http:get:: /capacity/storage/query
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ GET /capacity/storage/query HTTP/1.1
+ Accept: application/json
+
+ {
+ "resourceCriteria": {
+ "typeOfStorage" : "volume",
+ "sizeOfStorage" : 200,
+ "rdmaSupported" : "True",
+ },
+ "attributeSelector": "available",
+ "timePeriod": {
+ "startTime": "2015-09-28T12:00:00Z",
+ "stopTime": "2015-09-28T12:04:45Z"
+ }
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 200 OK
+ Content-Type: application/json
+
+ {
+ "lastUpdate": "2015-09-28T12:01:35Z",
+ "capacityInformation": {
+ "available": 2
+ }
+ }
+
+Notify Storage Capacity Change Event
+""""""""""""""""""""""""""""""""""""
+
+Notification about storage capacity changes
+
+.. http:post:: /capacity/storage/notification
+ :noindex:
+
+ **Example notification**:
+
+ .. sourcecode:: http
+
+ Content-Type: application/json
+
+ {
+ "notificationId": "xwvuts-rqponm-765432109",
+ "capacityChangeTime": "2015-09-28T12:01:35Z",
+ "resourceDescriptor": {
+ "storageResourceTypeId": "volumes"
+ },
+ "capacityInformation": {
+ "available": 2,
+ "reserved": 4,
+ "total": 10,
+ "allocated": 4
+ }
+ }
+
+Storage Resource Reservation
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Create Storage Resource Reservation
+"""""""""""""""""""""""""""""""""""
+
+Request the reservation of storage resource capacity
+
+.. http:post:: /reservation/storage/create
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ POST /reservation/storage/create HTTP/1.1
+ Accept: application/json
+
+ {
+ "startTime": "2015-09-28T13:00:00Z",
+ "storagePoolReservation": {
+ "storageSize": 10,
+ "numSnapshots": 3,
+ "numVolumes": 2
+ }
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 201 CREATED
+ Content-Type: application/json
+
+ {
+ "reservationData": {
+ "startTime": "2015-09-28T13:00:00Z",
+ "reservationStatus": "initialized",
+ "reservationId": "vvvv-wwww-xxxx",
+ "storagePoolReserved": {
+ "storageSize": 10,
+ "numSnapshots": 3,
+ "numVolumes": 2
+ }
+ }
+ }
+
+Query Storage Resource Reservation
+""""""""""""""""""""""""""""""""""
+
+Request to find out about reserved storage resources that the consumer has
+access to.
+
+.. http:get:: /reservation/storage/query
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ GET /reservation/storage/query HTTP/1.1
+ Accept: application/json
+
+ {
+ "queryReservationFilter": [
+ {
+ "reservationId": "vvvv-wwww-xxxx"
+ }
+ ]
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 200 OK
+ Content-Type: application/json
+
+ {
+ "queryResult": {
+ "startTime": "2015-09-28T13:00:00Z",
+ "reservationStatus": "active",
+ "reservationId": "vvvv-wwww-xxxx",
+ "storagePoolReserved": {
+ "storageSize": 10,
+ "numSnapshots": 3,
+ "numVolumes": 2
+ }
+ }
+ }
+
+Update Storage Resource Reservation
+"""""""""""""""""""""""""""""""""""
+
+Request to update storage resource reservation
+
+.. http:post:: /reservation/storage/update
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ POST /reservation/storage/update HTTP/1.1
+ Accept: application/json
+
+
+ {
+ "startTime": "2015-09-20T23:00:00Z",
+ "reservationId": "vvvv-wwww-xxxx"
+
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 201 CREATED
+ Content-Type: application/json
+
+ {
+ "reservationData": {
+ "startTime": "2015-09-20T23:00:00Z",
+ "reservationStatus": "active",
+ "reservationId": "vvvv-wwww-xxxx",
+ "storagePoolReserved": {
+ "storageSize": 10,
+ "numSnapshots": 3,
+ "numVolumes": 2
+ }
+ }
+ }
+
+Terminate Storage Resource Reservation
+""""""""""""""""""""""""""""""""""""""
+
+Request to terminate a storage resource reservation
+
+.. http:delete:: /reservation/storage/(reservation_id)
+ :noindex:
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 200
+ Content-Type: application/json
+
+ {
+ "reservationId": "xxxx-yyyy-zzzz",
+ }
diff --git a/docs/development/requirements/annex1.rst b/docs/development/requirements/annex1.rst
new file mode 100644
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--- /dev/null
+++ b/docs/development/requirements/annex1.rst
@@ -0,0 +1,37 @@
+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+
+.. _uc-brahmaputra:
+
+ANNEX A: Use case for OPNFV Brahmaputra
+=======================================
+
+A basic resource reservation use case to be realized for OPNFV B-release may
+look as follows:
+
+* Step 0: Shim-layer is monitoring/querying available capacity at NFVI
+
+ * Step 0a: Cloud operator creates a new OpenStack tenant user and updates
+ quota values for this user
+
+ * Step 0b: The tenant user is creating and instantiating a simple VNF
+ (e.g. 1 network, 2 VMs)
+
+ * Step 0c: OpenStack is notifying shim-layer about capacity change for
+ this new tenant user
+
+ * Step 0d: Cloud operator can visualize the changes using the GUI
+
+* Step 1: Consumer(NFVO) is sending a reservation request for future use to
+ shim-layer
+
+* Step 2: Shim-layer is checking for available capacity at the given time
+ window
+
+* Step 3: Shim-layer is responding with reservation identifier
+
+* Step 4 (optional): Consumer(NFVO) is sending an update reservation request
+ to shim-layer (startTime set to now) -> continue with Steps 2 and 3.
+
+* Step 5: Consumer(VNFM) is requesting the allocation of virtualised resources
+ using the reservation identifier in Step 3
diff --git a/docs/development/requirements/architecture.rst b/docs/development/requirements/architecture.rst
new file mode 100644
index 0000000..3eb20d3
--- /dev/null
+++ b/docs/development/requirements/architecture.rst
@@ -0,0 +1,258 @@
+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+
+============================================
+High level architecture and general features
+============================================
+
+Architecture Overview
+=====================
+
+.. figure:: images/figure1.png
+ :name: figure1
+ :width: 90%
+
+ Resource Reservation Architecture
+
+:numref:`figure1` shows the high level architecture for the resource reservation
+use cases. Reserved resources are guaranteed for a given user/client for the
+period expressed by start and end time. User/client represents the requestor
+and the consequent consumer of the reserved resources and correspond to the
+NFVO or VNFM in ETSI NFV terminology.
+
+Note: in this document only reservation requests from NFVO are considered.
+
+General Features
+================
+
+This section provides a list of features that need to be developed in the
+Promise project.
+
+* Resource capacity management
+
+ * Discovery of available resource capacity in resource providers
+ * Monitoring of available resource capacity in resource providers
+ * Update available resource capacity as a result of new or expired
+ reservations, addition/removal of resources. Note: this is a VIM internal
+ function, not an operation in the VIM northbound interface.
+
+* Resource reservation
+
+ * Set start time and end time for allocation
+ * Increase/decrease reserved resource's capacity
+ * Update resource reservations, e.g. add/remove reserved resources
+ * Terminate an allocated resource due to the end time of a reservation
+
+* VIM northbound interfaces
+
+ * Receive/Reply resource reservation requests
+ * Receive/Reply resource capacity management requests
+ * Receive/Reply resource allocation requests for reserved resources when
+ start time arrives
+ * Subscribe/Notify resource reservation event
+
+ * Notify reservation error or process completion prior to reservation
+ start
+ * Notify remaining time until termination of a resource due to the end
+ time of a reservation
+ * Notify termination of a resource due to the end time of a reservation
+
+ * Receive/Reply queries on available resource capacity
+ * Subscribe/Notify changes in available resource capacity
+
+High level northbound interface specification
+=============================================
+
+Resource Capacity Management
+----------------------------
+
+.. figure:: images/figure2.png
+ :name: figure2
+ :width: 90%
+
+ Resource capacity management message flow: notification of capacity change
+
+:numref:`figure2` shows a high level flow for a use case of resource capacity
+management. In this example, the VIM notifies the NFVO of capacity change after
+having received an event regarding a change in capacity (e.g. a fault
+notification) from the NFVI. The NFVO can also retrieve detailed capacity
+information using the Query Capacity Request interface operation.
+
+.. figure:: images/figure3.png
+ :name: figure3
+ :width: 90%
+
+ Resource capacity management message flow: query of capacity density
+
+:numref:`figure3` shows a high level flow for another use case of resource
+capacity management. In this example, the NFVO queries the VIM about the actual
+capacity to instantiate a certain resource according to a certain template, for
+example a VM according to a certain flavor. In this case the VIM responds with
+the number of VMs that could be instantiated according to that flavor with the
+currently available capacity.
+
+Resource Reservation
+--------------------
+
+.. figure:: images/figure4.png
+ :name: figure4
+ :width: 90%
+
+ Resource reservation flow
+
+:numref:`figure4` shows a high level flow for a use case of resource
+reservation. The main steps are:
+
+* The NFVO sends a resource reservation request to the VIM using the Create
+ Resource Reservation Request interface operation.
+* The NFVO gets a reservation identifier reservation associated with this
+ request in the reply message
+* Using the reservation identifier reservation, the NFVO can
+ query/update/terminate a resource reservation using the corresponding
+ interface operations
+* The NFVO is notified that the resource reservation is terminated due to the
+ end time of the reservation
+
+
+Information elements
+====================
+
+Resource Capacity Management
+----------------------------
+
+Notify Capacity Change Event
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The notification change message shall include the following information elements:
+
+============================ ========== =====================================
+Name Type Description
+============================ ========== =====================================
+Notification Identifier Identifier issued by the VIM for the
+ capacity change event notification
+Zone Identifier Identifier of the zone where capacity
+ has changed
+Used/Reserved/Total Capacity List Used, reserved and total capacity
+ information regarding the resource
+ items subscribed for notification for
+ which capacity change event occurred
+============================ ========== =====================================
+
+Query Resource Capacity Request
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The capacity management query request message shall include the following
+information elements:
+
+========== ========== ======================================================
+Name Type Description
+========== ========== ======================================================
+Zone Identifier Identifier of the zone where capacity is requested
+Attributes List Attributes of resource items to be notified regarding
+ capacity change events
+Resources List Identifiers of existing resource items to be queried
+ regarding capacity info (such as images, flavors,
+ virtual containers, networks, physical machines, etc.)
+========== ========== ======================================================
+
+The capacity management query request message may also include the following
+information element:
+
+====== ========== ==========================================================
+Name Type Description
+====== ========== ==========================================================
+Flavor Identifier Identifier that is passed in the request to obtain
+ information of the number of virtual resources that can be
+ instantiated according to this flavor with the available
+ capacity
+====== ========== ==========================================================
+
+Query Resource Capacity Reply
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The capacity management query reply message shall include the following
+information elements:
+
+============================ ========== =====================================
+Name Type Description
+============================ ========== =====================================
+Zone Identifier Identifier of the zone where capacity
+ is requested
+Used/Reserved/Total Capacity List Used, reserved and total capacity
+ information regarding each of the
+ resource items requested to check for
+ capacity
+============================ ========== =====================================
+
+The detailed specification of the northbound interface for Capacity Management
+in provided in section 5.1.1.
+
+Resource Reservation
+--------------------
+
+Create Resource Reservation Request
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The create resource reservation request message shall include the following
+information elements:
+
+========== ========== =========================================================
+Name Type Description
+========== ========== =========================================================
+Start Timestamp Start time for consumption of the reserved resources
+End Timestamp End time for consumption of the reserved resources
+Expiry Timestamp If not all reserved resources are allocated between start
+ time and expiry, the VIM shall release the corresponding
+ resources [#expiry]_
+Amount Number Amount of the resources per resource item type (i.e.
+ compute/network/storage) that need to be reserved
+Zone Identifier The zone where the resources need(s) to be reserved
+Attributes List Attributes of the resources to be reserved such as DPDK
+ support, hypervisor, network link bandwidth, affinity
+ rules, etc.
+Resources List Identifiers of existing resource items to be reserved
+ (such as images, flavors, virtual containers, networks,
+ physical machines, etc.)
+========== ========== =========================================================
+
+.. [#expiry] Expiry is a period around start time within which, the allocation
+ process must take place. If allocation process does not start
+ within the expiry period, the reservation becomes invalid and VIM
+ should release the resources
+
+Create Resource Reservation Reply
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The create resource reservation reply message shall include the following
+information elements:
+
+=========== ========== =======================================================
+Name Type Description
+=========== ========== =======================================================
+Reservation Identifier Identification of the reservation instance. It can be
+ used by a consumer to modify the reservation later, and
+ to request the allocation of the reserved resources.
+Message Text Output message that provides additional information
+ about the create resource reservation request (e.g. may
+ be a simple ACK if the request is being background
+ processed by the VIM)
+=========== ========== =======================================================
+
+Notify Reservation Event
+^^^^^^^^^^^^^^^^^^^^^^^^
+
+The notification reservation event message shall include the following
+information elements:
+
+============ ========== =====================================================
+Name Type Description
+============ ========== =====================================================
+Reservation Identifier Identification of the reservation instance triggering
+ the event
+Notification Identifier Identification of the resource event notification
+ issued by the VIM
+Message Text Message describing the event
+============ ========== =====================================================
+
+The detailed specification of the northbound interface for Resource Reservation
+is provided in section 5.1.2.
diff --git a/docs/development/requirements/gap_analysis.rst b/docs/development/requirements/gap_analysis.rst
new file mode 100644
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--- /dev/null
+++ b/docs/development/requirements/gap_analysis.rst
@@ -0,0 +1,99 @@
+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+
+=================================
+Gap analysis in upstream projects
+=================================
+
+This section provides a list of gaps in upstream projects for realizing
+resource reservation and management. The gap analysis work focuses on the
+current OpenStack Blazar project [BLAZAR]_ in this first release.
+
+OpenStack
+=========
+
+Resource reservation for future use
+-----------------------------------
+
+* Category: Blazar
+* Type: 'missing' (lack of functionality)
+* Description:
+
+ * To-be: To reserve a whole set of compute/storage/network resources in the
+ future
+ * As-is: Blazar currently can do only compute resource reservation by using
+ "Shelved VM"
+
+* Related blueprints:
+
+ * https://blueprints.launchpad.net/blazar/+spec/basic-volume-plugin
+ * https://blueprints.launchpad.net/blazar/+spec/basic-network-plugin
+ * It was planned in Blazar to implement volume and network/fixed ip
+ reservations
+
+Resource reservation update
+---------------------------
+
+* Category: Blazar
+* Type: 'missing' (lack of functionality)
+* Description:
+
+ * To-be: Have the possibility of adding/removing resources to an existing
+ reservation, e..g in case of NFVI failure
+ * As-is: Currently in Blazar, a reservation can only be modified in terms of
+ start/end time
+
+* Related blueprints: N/A
+
+Give me an offer
+----------------
+
+* Category: Blazar
+* Type: 'missing' (lack of functionality)
+* Description:
+
+ * To-be: To have the possibility of giving a quotation to a requesting user
+ and an expiration time. Reserved resources shall be released if they are
+ not claimed before this expiration time.
+ * As-is: Blazar can already send notification e.g. to inform a given user
+ that a reservation is about to expire
+
+* Related blueprints: N/A
+
+StormStack StormForge
+---------------------
+
+Stormify
+^^^^^^^^
+* Stormify enables rapid web applications construction
+* Based on Ember.js style Data stores
+* Developed on Node.js using coffeescript/javascript
+* Auto RESTful API generation based on Data Models
+* Development starts with defining Data Models
+* Code hosted at github : http://github.com/stormstack/stormify
+
+StormForge
+^^^^^^^^^^
+* Data Model driven management of Resource Providers
+* Based on Stormify Framework and implemented as per the OPNFV Promise
+ requirements
+* Data Models are auto generated and RESTful API code from YANG schema
+* Currently planned key services include Resource Capacity Management Service
+ and Resource Reservation Service
+* List of YANG schemas for Promise project is attached in the Appendix
+* Code hosted at github: http://github.com/stormstack/stormforge
+
+Resource Discovery
+^^^^^^^^^^^^^^^^^^
+* Category: StormForge
+* Type: 'planning' (lack of functionality)
+* Description
+
+ * To-be: To be able to discover resources in real time from OpenStack
+ components. Planning to add OpenStack Project to interface with Promise for
+ real time updates on capacity or any failures
+ * As-is: Currently, resource capacity is learnt using NB APIs related to
+ quota
+
+* Related Blueprints: N/A
+
diff --git a/docs/development/requirements/glossary.rst b/docs/development/requirements/glossary.rst
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--- /dev/null
+++ b/docs/development/requirements/glossary.rst
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+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+
+===================
+Definition of terms
+===================
+
+Different SDOs and communities use different terminology related to
+NFV/Cloud/SDN. This list tries to define an OPNFV terminology,
+mapping/translating the OPNFV terms to terminology used in other contexts.
+
+.. glossary::
+
+ Administrator
+ Administrator of the system, e.g. OAM in Telco context.
+
+ Consumer
+ User-side Manager; consumer of the interfaces produced by the VIM; VNFM,
+ NFVO, or Orchestrator in ETSI NFV [NFV003]_ terminology.
+
+ NFV
+ Network Function Virtualization
+
+ NFVI
+ Network Function Virtualization Infrastructure; totality of all hardware
+ and software components which build up the environment in which VNFs are
+ deployed.
+
+ NFVO
+ Network Functions Virtualization Orchestrator; functional block that
+ manages the Network Service (NS) lifecycle and coordinates the management
+ of NS lifecycle, VNF lifecycle (supported by the VNFM) and NFVI resources
+ (supported by the VIM) to ensure an optimized allocation of the necessary
+ resources and connectivity.
+
+ Physical resource
+ Actual resources in NFVI; not visible to Consumer.
+
+ Resource zone
+ A set of NFVI hardware and software resources logically grouped
+ according to physical isolation and redundancy capabilities or to
+ certain administrative policies for the NFVI [NFVIFA010]_
+
+ VIM
+ Virtualized Infrastructure Manager; functional block that is responsible
+ for controlling and managing the NFVI compute, storage and network
+ resources, usually within one operator's Infrastructure Domain, e.g. NFVI
+ Point of Presence (NFVI-PoP).
+
+ Virtual Machine (VM)
+ Virtualized computation environment that behaves very much like a physical
+ computer/server.
+
+ Virtual network
+ Virtual network routes information among the network interfaces of VM
+ instances and physical network interfaces, providing the necessary
+ connectivity.
+
+ Virtual resource
+ A Virtual Machine (VM), a virtual network, or virtualized storage; Offered
+ resources to "Consumer" as result of infrastructure virtualization;
+ visible to Consumer.
+
+ Virtual Storage
+ Virtualized non-volatile storage allocated to a VM.
+
+ VNF
+ Virtualized Network Function. Implementation of an Network Function that
+ can be deployed on a Network Function Virtualization Infrastructure (NFVI).
+
+ VNFM
+ Virtualized Network Function Manager; functional block that is responsible
+ for the lifecycle management of VNF.
diff --git a/docs/development/requirements/images/LICENSE b/docs/development/requirements/images/LICENSE
new file mode 100644
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--- /dev/null
+++ b/docs/development/requirements/images/LICENSE
@@ -0,0 +1,14 @@
+Copyright 2015 Open Platform for NFV Project, Inc. and its contributors
+
+Open Platform for NFV Project Documentation Licence
+===================================================
+Any documentation developed by the "Open Platform for NFV Project"
+is licensed under a Creative Commons Attribution 4.0 International License.
+You should have received a copy of the license along with this. If not,
+see <http://creativecommons.org/licenses/by/4.0/>.
+
+Unless required by applicable law or agreed to in writing, documentation
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
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diff --git a/docs/development/requirements/impl_architecture.rst b/docs/development/requirements/impl_architecture.rst
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+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+
+Detailed architecture and message flows
+=======================================
+
+Within the Promise project we consider two different architectural options, i.e.
+a *shim-layer* based architecture and an architecture targeting at full
+OpenStack *integration*.
+
+Shim-layer architecture
+-----------------------
+
+The *shim-layer architecture* is using a layer on top of OpenStack to provide
+the capacity management, resource reservation, and resource allocation features.
+
+
+Detailed Message Flows
+^^^^^^^^^^^^^^^^^^^^^^
+
+Note, that only selected parameters for the messages are shown. Refer to
+:ref:`northbound_API` and Annex :ref:`yang_schema` for a full set of message
+parameters.
+
+Resource Capacity Management
+""""""""""""""""""""""""""""
+
+.. figure:: images/figure5_new.png
+ :name: figure5
+ :width: 90%
+
+ Capacity Management Scenario
+
+:numref:`figure5` shows a detailed message flow between the consumers and the
+capacity management functional blocks inside the shim-layer. It has the
+following steps:
+
+ * Step 1a: The Consumer sends a *query-capacity* request to Promise
+ using some filter like time-windows or resource type. The capacity is
+ looked up in the shim-layer capacity map.
+
+ * Step 1b: The shim-layer will respond with information about the
+ total, available, reserved, and used (allocated) capacities matching the
+ filter.
+
+ * Step 2a: The Consumer can send *increase/decrease-capacity* requests
+ to update the capacity available to the reservation system. It can be
+ 100% of available capacity in the given provider/source or only a subset,
+ i.e., it can allow for leaving some "buffer" in the actual NFVI to be
+ used outside the Promise shim-layer or for a different reservation
+ service instance. It can also be used to inform the reservation system
+ that from a certain time in the future, additional resources can be
+ reserved (e.g. due to a planned upgrade of the capacity), or the
+ available capacity will be reduced (e.g. due to a planned downtime of
+ some of the resources).
+
+ * Step 2b: The shim-layer will respond with an ACK/NACK message.
+
+ * Step 3a: Consumers can subscribe for capacity-change events using a
+ filter.
+
+ * Step 3b: Each successful subscription is responded with a
+ subscription_id.
+
+ * Step 4: The shim-layer monitors the capacity information for the
+ various types of resources by periodically querying the various
+ Controllers (e.g. Nova, Neutron, Cinder) or by creating event alarms in
+ the VIM (e.g. with Ceilometer for OpenStack) and updates capacity
+ information in its capacity map.
+
+ * Step 5: Capacity changes are notified to the Consumer.
+
+Resource Reservation
+""""""""""""""""""""
+
+.. figure:: images/figure6_new.png
+ :name: figure6
+ :width: 90%
+
+ Resource Reservation for Future Use Scenario
+
+:numref:`figure6` shows a detailed message flow between the Consumer and the
+resource reservation functional blocks inside the shim-layer. It has the
+following steps:
+
+ * Step 1a: The Consumer creates a resource reservation request for
+ future use by setting a start and end time for the reservation as well as
+ more detailed information about the resources to be reserved. The Promise
+ shim-layer will check the free capacity in the given time window and in
+ case sufficient capacity exists to meet the reservation request, will
+ mark those resources "reserved" in its reservation map.
+
+ * Step 1b: If the reservation was successful, a reservation_id and
+ status of the reservation will be returned to the Consumer. In case the
+ reservation cannot be met, the shim-layer may return information about
+ the maximum capacity that could be reserved during the requested time
+ window and/or a potential time window where the requested (amount of)
+ resources would be available.
+
+ * Step 2a: Reservations can be updated using an *update-reservation*,
+ providing the reservation_id and the new reservation_data. Promise
+ Reservation Manageer will check the feasibility to update the reservation
+ as requested.
+
+ * Step 2b: If the reservation was updated successfully, a
+ reservation_id and status of the reservation will be returned to the
+ Consumer. Otherwise, an appropriate error message will be returned.
+
+ * Step 3a: A *cancel-reservation* request can be used to withdraw an
+ existing reservation. Promise will update the reservation map by removing
+ the reservation as well as the capacity map by adding the freed capacity.
+
+ * Step 3b: The response message confirms the cancelation.
+
+ * Step 4a: Consumers can also issue *query-reservation* requests to
+ receive a list of reservation. An input filter can be used to narrow down
+ the query, e.g., only provide reservations in a given time window.
+ Promise will query its reservation map to identify reservations matching
+ the input filter.
+
+ * Step 4b: The response message contains information about all
+ reservations matching the input filter. It also provides information
+ about the utilization in the requested time window.
+
+ * Step 5a: Consumers can subscribe for reservation-change events using
+ a filter.
+
+ * Step 5b: Each successful subscription is responded with a
+ subscription_id.
+
+ * Step 6a: Promise synchronizes the available and used capacity with
+ the underlying VIM.
+
+ * Step 6b: In certain cases, e.g., due a failure in the underlying
+ hardware, some reservations cannot be kept up anymore and have to be
+ updated or canceled. The shim-layer will identify affected reservations
+ among its reservation records.
+
+ * Step 7: Subscribed Consumers will be informed about the updated
+ reservations. The notification contains the updated reservation_data and
+ new status of the reservation. It is then up to the Consumer to take
+ appropriate actions in order to ensure high priority reservations are
+ favored over lower priority reservations.
+
+Resource Allocation
+"""""""""""""""""""
+
+.. figure:: images/figure7_new.png
+ :name: figure7
+ :width: 90%
+
+ Resource Allocation
+
+:numref:`figure7` shows a detailed message flow between the Consumer, the
+functional blocks inside the shim-layer, and the VIM. It has the following
+steps:
+
+ * Step 1a: The Consumer sends a *create-instance* request providing
+ information about the resources to be reserved, i.e., provider_id
+ (optional in case of only one provider), name of the instance, the
+ requested flavour and image, etc. If the allocation is against an
+ existing reservation, the reservation_id has to be provided.
+
+ * Step 1b: If a reservation_id was provided, Promise checks if a
+ reservation with that ID exists, the reservation start time has arrived
+ (i.e. the reservation is active), and the required capacity for the
+ requested flavor is within the available capacity of the reservation. If
+ those conditions are met, Promise creates a record for the allocation
+ (VMState="INITIALIZED") and update its databases. If no reservation_id
+ was provided in the allocation request, Promise checks whether the
+ required capacity to meet the request can be provided from the available,
+ non-reserved capacity. If yes, Promise creates a record for the
+ allocation and update its databases. In any other case, Promise rejects
+ the *create-instance* request.
+
+ * Step 2: In the case the *create-instance* request was rejected,
+ Promise responds with a "status=rejected" providing the reason of the
+ rejection. This will help the Consumer to take appropriate actions, e.g.,
+ send an updated *create-instance* request. The allocation work flow will
+ terminate at this step and the below steps are not executed.
+
+ * Step 3a: If the *create-instance* request was accepted and a related
+ allocation record has been created, the shim-layer issues a
+ *createServer* request to the VIM Controller providing all information to
+ create the server instance.
+
+ * Step 3b: The VIM Controller sends an immediate reply with an
+ instance_id and starts the VIM-internal allocation process.
+
+ * Step 4: The Consumer gets an immediate response message with
+ allocation status "in progress" and the assigned instance_id.
+
+ * Step 5a+b: The consumer subscribes to receive notifications about
+ allocation events related to the requested instance. Promise responds
+ with an acknowledgment including a subscribe_id.
+
+ * Step 6: In parallel to the previous step, Promise shim-layer creates
+ an alarm in Aodh to receive notifications about all changes to the
+ VMState for instance_id.
+
+ * Step 7a: The VIM Controller notifies all instance related events to
+ Ceilometer. After the allocation has been completed or failed, it sends
+ an event to Ceilometer. This triggers the OpenStack alarming service Aodh
+ to notify the new VMState (e.g. ACTIVE and ERROR) to the shim-layer that
+ updates its internal allocation records.
+
+ * Step 7b: Promise sends a notification message to the subscribed
+ Consumer with information on the allocated resources including their new
+ VMState.
+
+ * Step 8a+b: Allocated instances can be terminated by the Consumer by
+ sending a *destroy-instance* request to the shim-layer. Promise responds
+ with an acknowledgment and the new status "DELETING" for the instance.
+
+ * Step 9a: Promise sends a *deleteServer* request for the instance_id
+ to the VIM Controller.
+
+ * Step 10a: After the instance has been deleted, an event alarm is
+ sent to the shim-layer that updates its internal allocation records and
+ capacity utilization.
+
+ * Step 10b: The shim-layer also notifies the subscribed Consumer about
+ the successfully destroyed instance.
+
+
+Internal operations
+^^^^^^^^^^^^^^^^^^^
+
+.. note:: This section is to be updated
+
+In the following, the internal logic and operations of the shim-layer will be
+explained in more detail, e.g. the "check request" (step 1b in
+:numref:`figure7` of the allocation work flow).
+
+
+
+Integrated architecture
+-----------------------
+
+The *integrated architecture* aims at full integration with OpenStack.
+This means that it is planned to use the already existing OpenStack APIs
+extended with the reservation capabilities.
+
+The advantage of this approach is that we don't need to re-model the
+complex resource structure we have for the virtual machines and the
+corresponding infrastructure.
+
+The atomic item is the virtual machine with the minimum set of resources
+it requires to be able to start it up. It is important to state that
+resource reservation is handled on VM instance level as opposed to standalone
+resources like CPU, memory and so forth. As the placement is an important
+aspect in order to be able to use the reserved resources it provides the
+constraint to handle resources in groups.
+
+The placement constraint also makes it impossible to use a quota management
+system to solve the base use case described earlier in this document.
+
+OpenStack had a project called Blazar, which was created in order to provide
+resource reservation functionality in cloud environments. It uses the Shelve
+API of Nova, which provides a sub-optimal solution. Due to the fact that this
+feature blocks the reserved resources this solution cannot be considered to
+be final. Further work is needed to reach a more optimal stage, where the
+Nova scheduler is intended to be used to schedule the resources for future
+use to make the reservations.
+
+Phases of the work
+^^^^^^^^^^^^^^^^^^
+
+The work has two main stages to reach the final solution. The following main work items
+are on the roadmap for this approach:
+
+#. Sub-optimal solution by using the shelve API of Nova through the Blazar project:
+
+ * Fix the code base of the Blazar project:
+
+ Due to integration difficulties the Blazar project got suspended. Since the last
+ activities in that repository the OpenStack code base and environment changed
+ significantly, which means that the project's code base needs to be updated to the
+ latest standards and has to be able to interact with the latest version of the
+ other OpenStack services.
+
+ * Update the Blazar API:
+
+ The REST API needs to be extended to contain the attributes for the reservation
+ defined in this document. This activity shall include testing towards the new API.
+
+#. Use Nova scheduler to avoid blocking the reserved resources:
+
+ * Analyze the Nova scheduler:
+
+ The status and the possible interface between the resource reservation system and
+ the Nova scheduler needs to be identified. It is crucial to achieve a much more
+ optimal solution than what the current version of Blazar can provide. The goal is
+ to be able to use the reserved resources before the reservation starts. In order to
+ be able to achieve this we need the scheduler to do scheduling for the future
+ considering the reservation intervals that are specified in the request.
+
+ * Define a new design based on the analysis and start the work on it:
+
+ The design for the more optimal solution can be defined only after analyzing the
+ structure and capabilities of the Nova scheduler.
+
+ * This phase can be started in parallel with the previous one.
+
+Detailed Message Flows
+^^^^^^^^^^^^^^^^^^^^^^
+
+.. note:: to be done
+
+Resource Reservation
+""""""""""""""""""""
+
+.. note:: to be specified
diff --git a/docs/development/requirements/index.rst b/docs/development/requirements/index.rst
new file mode 100644
index 0000000..00edf0e
--- /dev/null
+++ b/docs/development/requirements/index.rst
@@ -0,0 +1,52 @@
+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+
+****************************
+Promise: Resource Management
+****************************
+
+:Project: Promise, https://wiki.opnfv.org/promise
+:Editors: Ashiq Khan (NTT DOCOMO), Bertrand Souville (NTT DOCOMO)
+:Authors: Ravi Chunduru (ClearPath Networks), Peter Lee (ClearPath Networks),
+ Gerald Kunzmann (NTT DOCOMO), Ryota Mibu (NEC),
+ Carlos Goncalves (NEC), Arturo Martin De Nicolas (Ericsson)
+
+:History:
+ ========== =====================================================
+ Date Description
+ ========== =====================================================
+ 04.12.2014 Project creation
+ 20.04.2015 Initial version of the deliverable uploaded to gerrit
+ 19.06.2015 Stable version of the Promise deliverable
+ ========== =====================================================
+
+:Abstract: Promise is an OPNFV requirement project. Its objective is to realize
+ ETSI NFV defined resource reservation and NFVI capacity features
+ within the scope of OPNFV. Promise provides the details of the
+ requirements on resource reservation, NFVI capacity management at
+ VIM, specification of the northbound interfaces from VIM relevant to
+ these features, and implementation plan to realize these features in
+ OPNFV.
+
+.. raw:: latex
+
+ \newpage
+
+.. toctree::
+ :maxdepth: 4
+ :numbered:
+
+ glossary.rst
+ intro.rst
+ usecase.rst
+ architecture.rst
+ gap_analysis.rst
+ impl_architecture.rst
+ NB_interface.rst
+ summary.rst
+
+ references.rst
+ annex1.rst
+ schemas.rst
+ supported_apis.rst
+ revision.rst
diff --git a/docs/development/requirements/intro.rst b/docs/development/requirements/intro.rst
new file mode 100644
index 0000000..654fdf9
--- /dev/null
+++ b/docs/development/requirements/intro.rst
@@ -0,0 +1,39 @@
+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+
+============
+Introduction
+============
+
+Resource reservation is a basic function for the operation of a virtualized
+telecom network. In resource reservation, VIM reserves resources for a certain
+period as requested by the NFVO. A resource reservation will have a start time
+which could be into the future. Therefore, the reserved resources shall be
+available for the NFVO requested purpose (e.g. for a VNF) at the start time for
+the duration asked by NFVO. Resources include all three resource types in an
+NFVI i.e. compute, storage and network.
+
+Besides, NFVO requires abstracted NFVI resource capacity information in order
+to take decisions on VNF placement and other operations related to the virtual
+resources. VIM is required to inform the NFVO of NFVI resource state
+information for this purpose. Promise project aims at delivering the detailed
+requirements on these two features defined in ETSI NFV MAN GS [NFVMAN]_,
+the list of gaps in upstream projects, potential implementation architecture
+and plan, and the VIM northbound interface specification for resource
+reservation and capacity management.
+
+Problem description
+===================
+
+OpenStack, a prominent candidate for the VIM, cannot reserve resources for
+future use. OpenStack requires immediate instantiation of Virtual Machines
+(VMs) in order to occupy resources intended to be reserved. Blazar can reserve
+compute resources for future by keeping the VMs in shelved mode. However, such
+reserved resources can also be used for scaling out rather than new VM
+instantiation. Blazar does not support network and storage resource reservation
+yet.
+
+Besides, OpenStack does not provide a northbound interface through which it can
+notify an upper layer management entity e.g. NFVO about capacity changes in its
+NFVI, periodically or in an event driven way. Capacity management is a feature
+defined in ETSI NFV MAN GS [NFVMAN]_ and is required in network operation.
diff --git a/docs/development/requirements/references.rst b/docs/development/requirements/references.rst
new file mode 100644
index 0000000..c498b66
--- /dev/null
+++ b/docs/development/requirements/references.rst
@@ -0,0 +1,25 @@
+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+
+References and bibliography
+===========================
+
+.. [PROMISE] OPNFV, "Promise" requirements project, [Online]. Available at
+ https://wiki.opnfv.org/promise
+.. [BLAZAR] OpenStack Blazar Project, [Online]. Available at
+ https://wiki.openstack.org/wiki/Blazar
+.. [PROMOSS] Promise reference implementation, [Online]. Available at
+ https://github.com/opnfv/promise
+.. [YANGFO] Yangforge Project, [Online]. Available at
+ https://github.com/opnfv/yangforge
+.. [NFVMAN] ETSI GS NFV MAN 001, "Network Function Virtualisation (NFV); Management and Orchestration"
+.. [NFV003] ETSI GS NFV 003, "Network Function Virtualisation (NFV); Terminology for Main Concepts in NFV"
+.. [NFVIFA010] ETSI GS NFV IFA 010, "Network Function Virtualisation (NFV); Management and Orchestration;
+ Functional Requirements Specification"
+.. [NFVIFA005] ETSI GS NFV IFA 005, "Network Function Virtualisation (NFV); Management and Orchestration;
+ Or-Vi reference point - Interface and Information Model Specification"
+.. [NFVIFA006] ETSI GS NFV IFA 006 "Network Function Virtualisation (NFV); Management and Orchestration;
+ Vi-Vnfm reference point - Interface and Information Model Specification"
+.. [ETSINFV] ETSI NFV, [Online]. Available at
+ http://www.etsi.org/technologies-clusters/technologies/nfv
+
diff --git a/docs/development/requirements/revision.rst b/docs/development/requirements/revision.rst
new file mode 100644
index 0000000..cd0b76b
--- /dev/null
+++ b/docs/development/requirements/revision.rst
@@ -0,0 +1,43 @@
+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+
+ANNEX D: Document revision
+==========================
+
++---------+-----------------------------------------+
+| Version | Description |
++---------+-----------------------------------------+
+| 1.0.1 | JIRA: PROMISE-23 |
+| | - Reference to YangForge Framework |
+| | - Corrections to figure 3.1 |
++---------+-----------------------------------------+
+| 1.0.2 | JIRA: PROMISE-11 |
+| | - OPNFV Logo Added |
+| | - Alignment to ETSI NFV Specs |
++---------+-----------------------------------------+
+| 1.0.3 | JIRA: PROMISE-54 |
+| | - Use case for Brahmaputra |
++---------+-----------------------------------------+
+| 1.0.4 | JIRA: PROMISE-60 |
+| | - Editorial fixes |
+| | |
+| | JIRA: PROMISE-57 |
+| | - Split shim-layer architecture and |
+| | integrated architecture sections |
++---------+-----------------------------------------+
+| 1.0.5 | JIRA: PROMISE-61 |
+| | - Updated Promise Yang Schema |
++---------+-----------------------------------------+
+| 1.0.6 | JIRA: PROMISE-62 |
+| | - Supported APIs for Brahmaputra |
++---------+-----------------------------------------+
+| 1.0.7 | JIRA: PROMISE-63 |
+| | - Update message flow for shim-layer |
+| | JIRA: PROMISE-58 |
+| | - Integrated approach description |
+| | JIRA: PROMISE-64 |
+| | - Promise userguide |
++---------+-----------------------------------------+
+| 1.0.8 | JIRA: PROMISE-11 |
+| | - Alignment to ETSI NVF Specs |
++---------+-----------------------------------------+
diff --git a/docs/development/requirements/schemas.rst b/docs/development/requirements/schemas.rst
new file mode 100644
index 0000000..c98b7da
--- /dev/null
+++ b/docs/development/requirements/schemas.rst
@@ -0,0 +1,658 @@
+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+
+.. _yang_schema:
+
+ANNEX B: Promise YANG schema based on YangForge
+===============================================
+
+.. code::
+
+ module opnfv-promise {
+ namespace "urn:opnfv:promise";
+ prefix promise;
+
+ import complex-types { prefix ct; }
+ import ietf-yang-types { prefix yang; }
+ import ietf-inet-types { prefix inet; }
+ import access-control-models { prefix acm; }
+ import nfv-infrastructure { prefix nfvi; }
+ import nfv-mano { prefix mano; }
+
+ description
+ "OPNFV Promise Resource Reservation/Allocation controller module";
+
+ revision 2015-10-05 {
+ description "Complete coverage of reservation related intents";
+ }
+
+ revision 2015-08-06 {
+ description "Updated to incorporate YangForge framework";
+ }
+
+ revision 2015-04-16 {
+ description "Initial revision.";
+ }
+
+ feature reservation-service {
+ description "When enabled, provides resource reservation service";
+ }
+
+ feature multi-provider {
+ description "When enabled, provides resource management across multiple providers";
+ }
+
+ typedef reference-identifier {
+ description "defines valid formats for external reference id";
+ type union {
+ type yang:uuid;
+ type inet:uri;
+ type uint32;
+ }
+ }
+
+ grouping resource-utilization {
+ container capacity {
+ container total { description 'Conceptual container that should be extended'; }
+ container reserved { description 'Conceptual container that should be extended';
+ config false; }
+ container usage { description 'Conceptual container that should be extended';
+ config false; }
+ container available { description 'Conceptual container that should be extended';
+ config false; }
+ }
+ }
+
+ grouping temporal-resource-collection {
+ description
+ "Information model capturing resource-collection with start/end time window";
+
+ leaf start { type yang:date-and-time; }
+ leaf end { type yang:date-and-time; }
+
+ uses nfvi:resource-collection;
+ }
+
+ grouping resource-usage-request {
+ description
+ "Information model capturing available parameters to make a resource
+ usage request.";
+ reference "OPNFV-PROMISE, Section 3.4.1";
+
+ uses temporal-resource-collection {
+ refine elements {
+ description
+ "Reference to a list of 'pre-existing' resource elements that are
+ required for fulfillment of the resource-usage-request.
+
+ It can contain any instance derived from ResourceElement,
+ such as ServerInstances or even other
+ ResourceReservations. If the resource-usage-request is
+ accepted, the ResourceElement(s) listed here will be placed
+ into 'protected' mode as to prevent accidental removal.
+
+ If any of these resource elements become 'unavailable' due to
+ environmental or administrative activity, a notification will
+ be issued informing of the issue.";
+ }
+ }
+
+ leaf zone {
+ description "Optional identifier to an Availability Zone";
+ type instance-identifier { ct:instance-type nfvi:AvailabilityZone; }
+ }
+ }
+
+ grouping query-start-end-window {
+ container window {
+ description "Matches entries that are within the specified start/end time window";
+ leaf start { type yang:date-and-time; }
+ leaf end { type yang:date-and-time; }
+ leaf scope {
+ type enumeration {
+ enum "exclusive" {
+ description "Matches entries that start AND end within the window";
+ }
+ enum "inclusive" {
+ description "Matches entries that start OR end within the window";
+ }
+ }
+ default "inclusive";
+ }
+ }
+ }
+
+ grouping query-resource-collection {
+ uses query-start-end-window {
+ description "Match for ResourceCollection(s) that are within the specified
+ start/end time window";
+ }
+ leaf-list without {
+ description "Excludes specified collection identifiers from the result";
+ type instance-identifier { ct:instance-type ResourceCollection; }
+ }
+ leaf show-utilization { type boolean; default true; }
+ container elements {
+ leaf-list some {
+ description "Query for ResourceCollection(s) that contain some or more of
+ these element(s)";
+ type instance-identifier { ct:instance-type nfvi:ResourceElement; }
+ }
+ leaf-list every {
+ description "Query for ResourceCollection(s) that contain all of
+ these element(s)";
+ type instance-identifier { ct:instance-type nfvi:ResourceElement; }
+ }
+ }
+ }
+
+ grouping common-intent-output {
+ leaf result {
+ type enumeration {
+ enum "ok";
+ enum "conflict";
+ enum "error";
+ }
+ }
+ leaf message { type string; }
+ }
+
+ grouping utilization-output {
+ list utilization {
+ key 'timestamp';
+ leaf timestamp { type yang:date-and-time; }
+ leaf count { type int16; }
+ container capacity { uses nfvi:resource-capacity; }
+ }
+ }
+
+ ct:complex-type ResourceCollection {
+ ct:extends nfvi:ResourceContainer;
+ ct:abstract true;
+
+ description
+ "Describes an abstract ResourceCollection data model, which represents
+ a grouping of capacity and elements available during a given
+ window in time which must be extended by other resource
+ collection related models";
+
+ leaf start { type yang:date-and-time; }
+ leaf end { type yang:date-and-time; }
+
+ leaf active {
+ config false;
+ description
+ "Provides current state of this record whether it is enabled and within
+ specified start/end time";
+ type boolean;
+ }
+ }
+
+ ct:complex-type ResourcePool {
+ ct:extends ResourceCollection;
+
+ description
+ "Describes an instance of an active ResourcePool record, which
+ represents total available capacity and elements from a given
+ source.";
+
+ leaf source {
+ type instance-identifier {
+ ct:instance-type nfvi:ResourceContainer;
+ require-instance true;
+ }
+ mandatory true;
+ }
+
+ refine elements {
+ // following 'must' statement applies to each element
+ // NOTE: just a non-working example for now...
+ must "boolean(/source/elements/*[@id=id])" {
+ error-message "One or more of the ResourceElement(s) does not exist in
+ the provider to be reserved";
+ }
+ }
+ }
+
+ ct:complex-type ResourceReservation {
+ ct:extends ResourceCollection;
+
+ description
+ "Describes an instance of an accepted resource reservation request,
+ created usually as a result of 'create-reservation' request.
+
+ A ResourceReservation is a derived instance of a generic
+ ResourceCollection which has additional parameters to map the
+ pool(s) that were referenced to accept this reservation as well
+ as to track allocations made referencing this reservation.
+
+ Contains the capacities of various resource attributes being
+ reserved along with any resource elements that are needed to be
+ available at the time of allocation(s).";
+
+ reference "OPNFV-PROMISE, Section 3.4.1";
+
+ leaf created-on { type yang:date-and-time; config false; }
+ leaf modified-on { type yang:date-and-time; config false; }
+
+ leaf-list pools {
+ config false;
+ description
+ "Provides list of one or more pools that were referenced for providing
+ the requested resources for this reservation. This is an
+ important parameter for informing how/where allocation
+ requests can be issued using this reservation since it is
+ likely that the total reserved resource capacity/elements are
+ made availble from multiple sources.";
+ type instance-identifier {
+ ct:instance-type ResourcePool;
+ require-instance true;
+ }
+ }
+
+ container remaining {
+ config false;
+ description
+ "Provides visibility into total remaining capacity for this
+ reservation based on allocations that took effect utilizing
+ this reservation ID as a reference.";
+
+ uses nfvi:resource-capacity;
+ }
+
+ leaf-list allocations {
+ config false;
+ description
+ "Reference to a collection of consumed allocations referencing
+ this reservation.";
+ type instance-identifier {
+ ct:instance-type ResourceAllocation;
+ require-instance true;
+ }
+ }
+ }
+
+ ct:complex-type ResourceAllocation {
+ ct:extends ResourceCollection;
+
+ description
+ "A ResourceAllocation record denotes consumption of resources from a
+ referenced ResourcePool.
+
+ It does not reflect an accepted request but is created to
+ represent the actual state about the ResourcePool. It is
+ created once the allocation(s) have successfully taken effect
+ on the 'source' of the ResourcePool.
+
+ The 'priority' state indicates the classification for dealing
+ with resource starvation scenarios. Lower priority allocations
+ will be forcefully terminated to allow for higher priority
+ allocations to be fulfilled.
+
+ Allocations without reference to an existing reservation will
+ receive the lowest priority.";
+
+ reference "OPNFV-PROMISE, Section 3.4.3";
+
+ leaf reservation {
+ description "Reference to an existing reservation identifier (optional)";
+
+ type instance-identifier {
+ ct:instance-type ResourceReservation;
+ require-instance true;
+ }
+ }
+
+ leaf pool {
+ description "Reference to an existing resource pool from which allocation is drawn";
+
+ type instance-identifier {
+ ct:instance-type ResourcePool;
+ require-instance true;
+ }
+ }
+
+ container instance-ref {
+ config false;
+ description
+ "Reference to actual instance identifier of the provider/server
+ for this allocation";
+ leaf provider {
+ type instance-identifier { ct:instance-type ResourceProvider; }
+ }
+ leaf server { type yang:uuid; }
+ }
+
+ leaf priority {
+ config false;
+ description
+ "Reflects current priority level of the allocation according to
+ classification rules";
+ type enumeration {
+ enum "high" { value 1; }
+ enum "normal" { value 2; }
+ enum "low" { value 3; }
+ }
+ default "normal";
+ }
+ }
+
+ ct:complex-type ResourceProvider {
+ ct:extends nfvi:ResourceContainer;
+
+ key "name";
+ leaf token { type string; mandatory true; }
+
+ container services { // read-only
+ config false;
+ container compute {
+ leaf endpoint { type inet:uri; }
+ ct:instance-list flavors { ct:instance-type nfvi:ComputeFlavor; }
+ }
+ }
+
+ leaf-list pools {
+ config false;
+ description
+ "Provides list of one or more pools that are referencing this provider.";
+
+ type instance-identifier {
+ ct:instance-type ResourcePool;
+ require-instance true;
+ }
+ }
+ }
+
+ // MAIN CONTAINER
+ container promise {
+
+ uses resource-utilization {
+ description "Describes current state info about capacity utilization info";
+
+ augment "capacity/total" { uses nfvi:resource-capacity; }
+ augment "capacity/reserved" { uses nfvi:resource-capacity; }
+ augment "capacity/usage" { uses nfvi:resource-capacity; }
+ augment "capacity/available" { uses nfvi:resource-capacity; }
+ }
+
+ ct:instance-list providers {
+ if-feature multi-provider;
+ description "Aggregate collection of all registered ResourceProvider instances
+ for Promise resource management service";
+ ct:instance-type ResourceProvider;
+ }
+
+ ct:instance-list pools {
+ if-feature reservation-service;
+ description "Aggregate collection of all ResourcePool instances";
+ ct:instance-type ResourcePool;
+ }
+
+ ct:instance-list reservations {
+ if-feature reservation-service;
+ description "Aggregate collection of all ResourceReservation instances";
+ ct:instance-type ResourceReservation;
+ }
+
+ ct:instance-list allocations {
+ description "Aggregate collection of all ResourceAllocation instances";
+ ct:instance-type ResourceAllocation;
+ }
+
+ container policy {
+ container reservation {
+ leaf max-future-start-range {
+ description
+ "Enforce reservation request 'start' time is within allowed range from now";
+ type uint16 { range 0..365; }
+ units "days";
+ }
+ leaf max-future-end-range {
+ description
+ "Enforce reservation request 'end' time is within allowed range from now";
+ type uint16 { range 0..365; }
+ units "days";
+ }
+ leaf max-duration {
+ description
+ "Enforce reservation duration (end-start) does not exceed specified threshold";
+ type uint16;
+ units "hours";
+ default 8760; // for now cap it at max one year as default
+ }
+ leaf expiry {
+ description
+ "Duration in minutes from start when unallocated reserved resources
+ will be released back into the pool";
+ type uint32;
+ units "minutes";
+ }
+ }
+ }
+ }
+
+ //-------------------
+ // INTENT INTERFACE
+ //-------------------
+
+ // RESERVATION INTENTS
+ rpc create-reservation {
+ if-feature reservation-service;
+ description "Make a request to the reservation system to reserve resources";
+ input {
+ uses resource-usage-request;
+ }
+ output {
+ uses common-intent-output;
+ leaf reservation-id {
+ type instance-identifier { ct:instance-type ResourceReservation; }
+ }
+ }
+ }
+
+ rpc update-reservation {
+ description "Update reservation details for an existing reservation";
+ input {
+ leaf reservation-id {
+ type instance-identifier {
+ ct:instance-type ResourceReservation;
+ require-instance true;
+ }
+ mandatory true;
+ }
+ uses resource-usage-request;
+ }
+ output {
+ uses common-intent-output;
+ }
+ }
+
+ rpc cancel-reservation {
+ description "Cancel the reservation and be a good steward";
+ input {
+ leaf reservation-id {
+ type instance-identifier { ct:instance-type ResourceReservation; }
+ mandatory true;
+ }
+ }
+ output {
+ uses common-intent-output;
+ }
+ }
+
+ rpc query-reservation {
+ if-feature reservation-service;
+ description "Query the reservation system to return matching reservation(s)";
+ input {
+ leaf zone { type instance-identifier { ct:instance-type nfvi:AvailabilityZone; } }
+ uses query-resource-collection;
+ }
+ output {
+ leaf-list reservations { type instance-identifier
+ { ct:instance-type ResourceReservation; } }
+ uses utilization-output;
+ }
+ }
+
+ // CAPACITY INTENTS
+ rpc increase-capacity {
+ description "Increase total capacity for the reservation system
+ between a window in time";
+ input {
+ uses temporal-resource-collection;
+ leaf source {
+ type instance-identifier {
+ ct:instance-type nfvi:ResourceContainer;
+ }
+ }
+ }
+ output {
+ uses common-intent-output;
+ leaf pool-id {
+ type instance-identifier { ct:instance-type ResourcePool; }
+ }
+ }
+ }
+
+ rpc decrease-capacity {
+ description "Decrease total capacity for the reservation system
+ between a window in time";
+ input {
+ uses temporal-resource-collection;
+ leaf source {
+ type instance-identifier {
+ ct:instance-type nfvi:ResourceContainer;
+ }
+ }
+ }
+ output {
+ uses common-intent-output;
+ leaf pool-id {
+ type instance-identifier { ct:instance-type ResourcePool; }
+ }
+ }
+ }
+
+ rpc query-capacity {
+ description "Check available capacity information about a specified
+ resource collection";
+ input {
+ leaf capacity {
+ type enumeration {
+ enum 'total';
+ enum 'reserved';
+ enum 'usage';
+ enum 'available';
+ }
+ default 'available';
+ }
+ leaf zone { type instance-identifier { ct:instance-type nfvi:AvailabilityZone; } }
+ uses query-resource-collection;
+ // TBD: additional parameters for query-capacity
+ }
+ output {
+ leaf-list collections { type instance-identifier
+ { ct:instance-type ResourceCollection; } }
+ uses utilization-output;
+ }
+ }
+
+ // ALLOCATION INTENTS (should go into VIM module in the future)
+ rpc create-instance {
+ description "Create an instance of specified resource(s) utilizing capacity
+ from the pool";
+ input {
+ leaf provider-id {
+ if-feature multi-provider;
+ type instance-identifier { ct:instance-type ResourceProvider;
+ require-instance true; }
+ }
+ leaf name { type string; mandatory true; }
+ leaf image {
+ type reference-identifier;
+ mandatory true;
+ }
+ leaf flavor {
+ type reference-identifier;
+ mandatory true;
+ }
+ leaf-list networks {
+ type reference-identifier;
+ description "optional, will assign default network if not provided";
+ }
+
+ // TODO: consider supporting a template-id (such as HEAT) for more complex instantiation
+
+ leaf reservation-id {
+ type instance-identifier { ct:instance-type ResourceReservation;
+ require-instance true; }
+ }
+ }
+ output {
+ uses common-intent-output;
+ leaf instance-id {
+ type instance-identifier { ct:instance-type ResourceAllocation; }
+ }
+ }
+ }
+
+ rpc destroy-instance {
+ description "Destroy an instance of resource utilization and release it
+ back to the pool";
+ input {
+ leaf instance-id {
+ type instance-identifier { ct:instance-type ResourceAllocation;
+ require-instance true; }
+ }
+ }
+ output {
+ uses common-intent-output;
+ }
+ }
+
+ // PROVIDER INTENTS (should go into VIM module in the future)
+ rpc add-provider {
+ description "Register a new resource provider into reservation system";
+ input {
+ leaf provider-type {
+ description "Select a specific resource provider type";
+ mandatory true;
+ type enumeration {
+ enum openstack;
+ enum hp;
+ enum rackspace;
+ enum amazon {
+ status planned;
+ }
+ enum joyent {
+ status planned;
+ }
+ enum azure {
+ status planned;
+ }
+ }
+ default openstack;
+ }
+ uses mano:provider-credentials {
+ refine endpoint {
+ default "http://localhost:5000/v2.0/tokens";
+ }
+ }
+ container tenant {
+ leaf id { type string; }
+ leaf name { type string; }
+ }
+ }
+ output {
+ uses common-intent-output;
+ leaf provider-id {
+ type instance-identifier { ct:instance-type ResourceProvider; }
+ }
+ }
+ }
+
+ // TODO...
+ notification reservation-event;
+ notification capacity-event;
+ notification allocation-event;
+ }
diff --git a/docs/development/requirements/summary.rst b/docs/development/requirements/summary.rst
new file mode 100644
index 0000000..fcf10d1
--- /dev/null
+++ b/docs/development/requirements/summary.rst
@@ -0,0 +1,27 @@
+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+
+======================
+Summary and conclusion
+======================
+
+Resource Reservation and Resource Capacity Management are features to be
+supported by the VIM and exposed to the consumer via the VIM NBI. These
+features have been specified by ETSI NFV.
+
+This document has described several use cases and corresponding high level
+flows where Resource Reservation and Capacity Management are of great benefit
+for the consumer of the virtualised resource management interface: the NFVO or
+the VNFM. The use cases include:
+
+* Notification of changes in capacity in the NFVI
+* Query of available resource capacity
+* Reservation of a resource or set of resources for immediate use
+* Reservation of a resource or set of resources for future use
+
+The Promise project has performed a gap analysis in order to fulfill the
+required functionality. Based on the gap analysis an implementation plan and
+way forward has been proposed, including a possible design architecture and
+high level information model. Immediate next steps of this project is to
+deliver a working Proof-of-Concepts (PoC) and engage upstream communities to
+fill out the gaps identified by Promise.
diff --git a/docs/development/requirements/supported_apis.rst b/docs/development/requirements/supported_apis.rst
new file mode 100644
index 0000000..40cba8d
--- /dev/null
+++ b/docs/development/requirements/supported_apis.rst
@@ -0,0 +1,608 @@
+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+
+ANNEX C: Supported APIS
+=======================
+
+Add Provider
+------------
+
+Register a new resource provider (e.g. OpenStack) into reservation system.
+
+Request parameters
+
+============================ =========== ==============================================
+Name Type Description
+============================ =========== ==============================================
+provider-type Enumeration Name of the resource provider
+endpoint URI Targer URL end point for the resource provider
+username String User name
+password String Password
+region String Specified region for the provider
+tenant.id String Id of the tenant
+tenant.name String Name of the tenant
+============================ =========== ==============================================
+
+Response parameters
+
+============================ =========== ==============================================
+Name Type Description
+============================ =========== ==============================================
+provider-id String Id of the new resource provider
+result Enumeration Result info
+============================ =========== ==============================================
+
+.. http:post:: /add-provider
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ POST /add-provider HTTP/1.1
+ Accept: application/json
+
+ {
+ "provider-type": "openstack",
+ "endpoint": "http://10.0.2.15:5000/v2.0/tokens",
+ "username": "promise_user",
+ "password": "******",
+ "tenant": {
+ "name": "promise"
+ }
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 200 OK
+ Content-Type: application/json
+
+ {
+ "provider-id": "f25ed9cb-de57-43d5-9b4a-a389a1397302",
+ "result": "ok"
+ }
+
+Create Reservation
+------------------
+
+Make a request to the reservation system to reserve resources.
+
+Request parameters
+
+============================ =============== ==============================================
+Name Type Description
+============================ =============== ==============================================
+zone String Id to an availability zone
+start DateTime Timestamp when the consumption of reserved
+ resources can begin
+end DateTime Timestamp when the consumption of reserved
+ resources should end
+capacity.cores int16 Amount of cores to be reserved
+capacity.ram int32 Amount of RAM to be reserved
+capacity.instances int16 Amount of instances to be reserved
+capacity.addresses int32 Amount of public IP addresses to be reserved
+elements ResourceElement List of pre-existing resource elements
+ to be reserved
+============================ =============== ==============================================
+
+Response parameters
+
+============================ =========== ==============================================
+Name Type Description
+============================ =========== ==============================================
+reservation-id String Id of the reservation
+result Enumeration Result info
+message String Output message
+============================ =========== ==============================================
+
+.. http:post:: /create-reservation
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ POST /create-reservation HTTP/1.1
+ Accept: application/json
+
+ {
+ "capacity": {
+ "cores": "5",
+ "ram": "25600",
+ "addresses": "3",
+ "instances": "3"
+ },
+ "start": "2016-02-02T00:00:00Z",
+ "end": "2016-02-03T00:00:00Z"
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 200 OK
+ Content-Type: application/json
+
+ {
+ "reservation-id": "269b2944-9efc-41e0-b067-6898221e8619",
+ "result": "ok",
+ "message": "reservation request accepted"
+ }
+
+Update Reservation
+------------------
+
+Update reservation details for an existing reservation.
+
+Request parameters
+
+============================ =============== ==============================================
+Name Type Description
+============================ =============== ==============================================
+reservation-id String Id of the reservation to be updated
+zone String Id to an availability zone
+start DateTime Updated timestamp when the consumption of
+ reserved resources can begin
+end DateTime Updated timestamp when the consumption of
+ reserved resources should end
+capacity.cores int16 Updated amount of cores to be reserved
+capacity.ram int32 Updated amount of RAM to be reserved
+capacity.instances int16 Updated amount of instances to be reserved
+capacity.addresses int32 Updated amount of public IP addresses
+ to be reserved
+elements ResourceElement Updated list of pre-existing resource elements
+ to be reserved
+============================ =============== ==============================================
+
+Response parameters
+
+============================ =========== ==============================================
+Name Type Description
+============================ =========== ==============================================
+result Enumeration Result info
+message String Output message
+============================ =========== ==============================================
+
+.. http:post:: /update-reservation
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ POST /update-reservation HTTP/1.1
+ Accept: application/json
+
+ {
+ "reservation-id": "269b2944-9efv-41e0-b067-6898221e8619",
+ "capacity": {
+ "cores": "1",
+ "ram": "5120",
+ "addresses": "1",
+ "instances": "1"
+ }
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 200 OK
+ Content-Type: application/json
+
+ {
+ "result": "ok",
+ "message": "reservation update successful"
+ }
+
+Cancel Reservation
+------------------
+
+Cancel the reservation.
+
+Request parameters
+
+============================ =============== ==============================================
+Name Type Description
+============================ =============== ==============================================
+reservation-id String Id of the reservation to be canceled
+============================ =============== ==============================================
+
+Response parameters
+
+============================ =========== ==============================================
+Name Type Description
+============================ =========== ==============================================
+result Enumeration Result info
+message String Output message
+============================ =========== ==============================================
+
+.. http:post:: /cancel-reservation
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ POST /cancel-reservation HTTP/1.1
+ Accept: application/json
+
+ {
+ "reservation-id": "269b2944-9efv-41e0-b067-6898221e8619"
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 200 OK
+ Content-Type: application/json
+
+ {
+ "result": "ok",
+ "message": "reservation canceled"
+ }
+
+Query Reservation
+-----------------
+
+Query the reservation system to return matching reservation(s).
+
+Request parameters
+
+============================ ================== ==============================================
+Name Type Description
+============================ ================== ==============================================
+zone String Id to an availability zone
+show-utilization Boolean Show capacity utilization
+without ResourceCollection Excludes specified collection identifiers
+ from the result
+elements.some ResourceElement Query for ResourceCollection(s) that contain
+ some or more of these element(s)
+elements.every ResourceElement Query for ResourceCollection(s) that contain
+ all of these element(s)
+window.start DateTime Matches entries that are within the specified
+ start/end window
+window.end DateTime
+wndow.scope Enumeration Matches entries that start {and/or} end
+ within the time window
+============================ ================== ==============================================
+
+Response parameters
+
+============================ =================== ================================
+Name Type Description
+============================ =================== ================================
+reservations ResourceReservation List of matching reservations
+utilization CapacityUtilization Capacity utilization over time
+============================ =================== ================================
+
+.. http:post:: /query-reservation
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ POST /query-reservation HTTP/1.1
+ Accept: application/json
+
+ {
+ "show-utilization": false,
+ "window": {
+ "start": "2016-02-01T00:00:00Z",
+ "end": "2016-02-04T00:00:00Z"
+ }
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 200 OK
+ Content-Type: application/json
+
+ {
+ "reservations": [
+ "269b2944-9efv-41e0-b067-6898221e8619"
+ ],
+ "utilization": []
+ }
+
+Create Instance
+---------------
+
+Create an instance of specified resource(s) utilizing capacity from the pool.
+
+Request parameters
+
+============================ =============== ==============================================
+Name Type Description
+============================ =============== ==============================================
+provider-id String Id of the resource provider
+reservation-id String Id of the resource reservation
+name String Name of the instance
+image String Id of the image
+flavor String Id of the flavor
+networks Uuid List of network uuids
+============================ =============== ==============================================
+
+Response parameters
+
+============================ =========== ==============================================
+Name Type Description
+============================ =========== ==============================================
+instance-id String Id of the instance
+result Enumeration Result info
+message String Output message
+============================ =========== ==============================================
+
+.. http:post:: /create-instance
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ POST /create-instance HTTP/1.1
+ Accept: application/json
+
+ {
+ "provider-id": "f25ed9cb-de57-43d5-9b4a-a389a1397302",
+ "name": "vm1",
+ "image": "ddffc6f5-5c86-4126-b0fb-2c71678633f8",
+ "flavor": "91bfdf57-863b-4b73-9d93-fc311894b902"
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 200 OK
+ Content-Type: application/json
+
+ {
+ "instance-id": "82572779-896b-493f-92f6-a63008868250",
+ "result": "ok",
+ "message": "created-instance request accepted"
+ }
+
+Destroy Instance
+----------------
+
+Destroy an instance of resource utilization and release it back to the pool.
+
+Request parameters
+
+============================ =============== ==============================================
+Name Type Description
+============================ =============== ==============================================
+instance-id String Id of the instance to be destroyed
+============================ =============== ==============================================
+
+Response parameters
+
+============================ =========== ==============================================
+Name Type Description
+============================ =========== ==============================================
+result Enumeration Result info
+message String Output message
+============================ =========== ==============================================
+
+.. http:post:: /destroy-instance
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ POST /destroy-instance HTTP/1.1
+ Accept: application/json
+
+ {
+ "instance-id": "82572779-896b-493f-92f6-a63008868250"
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 200 OK
+ Content-Type: application/json
+
+ {
+ "result": "ok",
+ "message": "instance destroyed and resource released back to pool"
+ }
+
+Decrease Capacity
+-----------------
+
+Decrease total capacity for the reservation system for a given time window.
+
+Request parameters
+
+============================ =============== ==============================================
+Name Type Description
+============================ =============== ==============================================
+source String Id of the resource container
+start DateTime Start/end defines the time window when total
+ capacity is decreased
+end DateTime
+capacity.cores int16 Decreased amount of cores
+capacity.ram int32 Decreased amount of RAM
+capacity.instances int16 Decreased amount of instances
+capacity.addresses int32 Decreased amount of public IP addresses
+============================ =============== ==============================================
+
+Response parameters
+
+============================ =========== ==============================================
+Name Type Description
+============================ =========== ==============================================
+pool-id String Id of the resource pool
+result Enumeration Result info
+message String Output message
+============================ =========== ==============================================
+
+.. http:post:: /decrease-capacity
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ POST /decrease-capacity HTTP/1.1
+ Accept: application/json
+
+ {
+ "source": "ResourcePool:4085f0da-8030-4252-a0ff-c6f93870eb5f",
+ "capacity": {
+ "cores": "3",
+ "ram": "5120",
+ "addresses": "1"
+ }
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 200 OK
+ Content-Type: application/json
+
+ {
+ "pool-id": "c63b2a41-bcc6-42f6-8254-89d633e1bd0b",
+ "result": "ok",
+ "message": "capacity decrease successful"
+ }
+
+Increase Capacity
+-----------------
+
+Increase total capacity for the reservation system for a given time window.
+
+Request parameters
+
+============================ =============== ==============================================
+Name Type Description
+============================ =============== ==============================================
+source String Id of the resource container
+start DateTime Start/end defines the time window when total
+ capacity is increased
+end DateTime
+capacity.cores int16 Increased amount of cores
+capacity.ram int32 Increased amount of RAM
+capacity.instances int16 Increased amount of instances
+capacity.addresses int32 Increased amount of public IP addresses
+============================ =============== ==============================================
+
+Response parameters
+
+============================ =========== ==============================================
+Name Type Description
+============================ =========== ==============================================
+pool-id String Id of the resource pool
+result Enumeration Result info
+message String Output message
+============================ =========== ==============================================
+
+.. http:post:: /increase-capacity
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ POST /increase-capacity HTTP/1.1
+ Accept: application/json
+
+ {
+ "source": "ResourceProvider:f6f13fe3-0126-4c6d-a84f-15f1ab685c4f",
+ "capacity": {
+ "cores": "20",
+ "ram": "51200",
+ "instances": "10",
+ "addresses": "10"
+ }
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 200 OK
+ Content-Type: application/json
+
+ {
+ "pool-id": "279217a4-7461-4176-bf9d-66770574ca6a",
+ "result": "ok",
+ "message": "capacity increase successful"
+ }
+
+Query Capacity
+--------------
+
+Query for capacity information about a specified resource collection.
+
+Request parameters
+
+============================ ================== ==============================================
+Name Type Description
+============================ ================== ==============================================
+capacity Enumeration Return total or reserved or available or
+ usage capacity information
+zone String Id to an availability zone
+show-utilization Boolean Show capacity utilization
+without ResourceCollection Excludes specified collection identifiers
+ from the result
+elements.some ResourceElement Query for ResourceCollection(s) that contain
+ some or more of these element(s)
+elements.every ResourceElement Query for ResourceCollection(s) that contain
+ all of these element(s)
+window.start DateTime Matches entries that are within the specified
+ start/end window
+window.end DateTime
+window.scope Enumeration Matches entries that start {and/or} end
+ within the time window
+============================ ================== ==============================================
+
+Response parameters
+
+============================ =================== ================================
+Name Type Description
+============================ =================== ================================
+collections ResourceCollection List of matching collections
+utilization CapacityUtilization Capacity utilization over time
+============================ =================== ================================
+
+.. http:post:: /query-capacity
+ :noindex:
+
+ **Example request**:
+
+ .. sourcecode:: http
+
+ POST /query-capacity HTTP/1.1
+ Accept: application/json
+
+ {
+ "show-utilization": false
+ }
+
+ **Example response**:
+
+ .. sourcecode:: http
+
+ HTTP/1.1 201 CREATED
+ Content-Type: application/json
+
+ {
+ "collections": [
+ "ResourcePool:279217a4-7461-4176-bf9d-66770574ca6a"
+ ],
+ "utilization": []
+ }
+
diff --git a/docs/development/requirements/usecase.rst b/docs/development/requirements/usecase.rst
new file mode 100644
index 0000000..bdf8888
--- /dev/null
+++ b/docs/development/requirements/usecase.rst
@@ -0,0 +1,121 @@
+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+.. http://creativecommons.org/licenses/by/4.0
+
+=======================
+Use cases and scenarios
+=======================
+
+Use cases
+=========
+
+Resource reservation is a basic feature in any virtualization-based network
+operation. In order to perform such resource reservation from NFVO to VIM, NFVI
+capacity information is also necessary at the NFVO side. Below, four use cases
+to show typical requirements and solutions for capacity management and resource
+reservation is presented. A typical use case as considered for the Brahmaputra
+release is described in :ref:`uc-brahmaputra`.
+
+#. Resource capacity management
+#. Resource reservation for immediate use
+#. Resource reservation for future use
+#. Co-existence of reservations and allocation requests without reservation
+
+Resource capacity management
+----------------------------
+
+NFVO takes the first decision on in which NFVI it would instantiate a VNF. Along
+with NFVIs resource attributes (e.g. availability of hardware accelerators,
+particular CPU architectures etc.), NFVO needs to know available capacity of an
+NFVI in order to make an informed decision on selecting a particular NFVI. Such
+capacity information shall be in a coarser granularity than the respective VIM,
+as VIM maintains capacity information of its NFVI in fine details. However a
+very coarse granularity, like simply the number of available virtual CPU cores,
+may not be sufficient. In order to allow the NFVO to make well founded
+allocation decisions, an appropriate level to expose the available capacity may
+be per flavor. Capacity information may be required for the complete NFVI, or
+per partition or availability zone, or other granularities. Therefore, VIM
+requires to inform the NFVO about available capacity information regarding its
+NFVI at a pre-determined abstraction, either by a query-response, or in an
+event-based, or in a periodical way.
+
+Resource reservation for immediate use
+--------------------------------------
+
+Reservation is inherently for the future. Even if some reserved resources are to
+be consumed instantly, there is a network latency between the issuance of a
+resource reservation request from the NFVO, a response from the VIM, and actual
+allocation of the requested resources to a VNF/VNFM. Within such latency,
+resource capacity in the NFVI in question could change, e.g., due to failure,
+allocation to a different request. Therefore, the response from a VIM to the
+NFVO to a resource reservation request for immediate use should have a validity
+period which shows until when this VIM can hold the requested resources. During
+this time, the NFVO should proceed to allocation if it wishes to consume the
+reserved requested. If allocation is not performed within the validity period,
+the response from VIM for a particular resource reservation request becomes
+invalid and VIM is not liable to provide those resources to NFVO/VNFM anymore.
+Reservations requests for immediate use do not have a start time but may have
+an end time.
+
+Resource reservation for future use
+-----------------------------------
+
+Network operators may want to reserve extra resources for future use. Such
+necessity could arise from predicted congestion in telecom nodes e.g. due to
+local traffic spikes for concerts, natural disasters etc. In such a case, the
+NFVO, while sending a resource reservation request to the VIM, shall include a
+start time (and an end time if necessary). The start time indicates at what
+time the reserved resource shall be available to a designated consumer e.g. a
+VNF/VNFM. Here, the requirement is that the reserved resources shall be
+available when the start time arrives. After the start time has arrived, the
+reserved resources are allocated to the designated consumer(s). An explicit
+allocation request is needed. How actually these requested resources are held
+by the VIM for the period in between the arrival of the resource reservation
+request and the actual allocation is outside the scope of this requirement
+project.
+
+Co-existence of reservations and allocation requests without reservation
+------------------------------------------------------------------------
+
+In a real environment VIM will have to handle allocation requests without any
+time reference, i.e. time-unbound, together with time-bound reservations and
+allocation requests with an explicitly indicated end-time. A granted
+reservation for the future will effectively reduce the available capacity for
+any new time-unbound allocation request. The consequence is that reservations,
+even those far in the future, may result in denial of service for new
+allocation requests.
+
+To alleviate this problem several approaches can be taken. They imply an
+implicit or explicit priority scheme:
+
+* Allocation requests without reservation and which are time-unbound will be
+ granted resources in a best-effort way: if there is instant capacity, but the
+ resources may be later withdrawn due to the start time of a previously
+ granted reservation
+* Both allocation requests and reservation requests contain a priority which
+ may be related to SLAs and contractual conditions between the tenant and the
+ NFVI provider. Interactions may look like:
+
+ * A reservation request for future use may cancel another, not yet
+ started, reservation with lower priority
+ * An allocation request without reservations and time-unbound [#unbound]_
+ may be granted resources and prevent a future reservation with lower
+ priority from getting resources at start time
+ * A reservation request may result in terminating resources allocated to a
+ request with no reservation, if the latter has lower priority
+
+.. [#unbound] In this case, the consumer (VNFM or NFVO) requests to immediately
+ instantiate and assign virtualized resources without having
+ reserved the resources beforehand
+
+Scenarios
+=========
+
+This section describes the expected behavior of the system in different
+scenarios.
+
+As we are targeting a cloud platform with the above use cases, it is crucial to
+keep the flexibility in the system. By this means it is hard to explicitely
+block hardware resources for the future and ensure their availablility for
+allocation therefore it can happen that the reservation plan cannot be fulfilled
+due to certain changes in the underlying environment. We need to ensure that we
+are prepared for error and edge cases during the design period.