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diff --git a/docs/development/requirements/NB_interface.rst b/docs/development/requirements/NB_interface.rst new file mode 100644 index 0000000..8dba601 --- /dev/null +++ b/docs/development/requirements/NB_interface.rst @@ -0,0 +1,1061 @@ +.. 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 index 0000000..65a5f22 --- /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 index 0000000..9e4ec5c --- /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 new file mode 100644 index 0000000..48fd75b --- /dev/null +++ b/docs/development/requirements/glossary.rst @@ -0,0 +1,73 @@ +.. 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 index 0000000..3b8719c --- /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. diff --git a/docs/development/requirements/images/computeflavor.png b/docs/development/requirements/images/computeflavor.png Binary files differnew file mode 100755 index 0000000..3ea3dba --- /dev/null +++ b/docs/development/requirements/images/computeflavor.png diff --git a/docs/development/requirements/images/figure1.png b/docs/development/requirements/images/figure1.png Binary files differnew file mode 100644 index 0000000..065a995 --- /dev/null +++ b/docs/development/requirements/images/figure1.png diff --git a/docs/development/requirements/images/figure2.png b/docs/development/requirements/images/figure2.png Binary files differnew file mode 100755 index 0000000..dd002a2 --- /dev/null +++ b/docs/development/requirements/images/figure2.png diff --git a/docs/development/requirements/images/figure3.png b/docs/development/requirements/images/figure3.png Binary files differnew file mode 100755 index 0000000..20e51c7 --- /dev/null +++ b/docs/development/requirements/images/figure3.png diff --git a/docs/development/requirements/images/figure4.png b/docs/development/requirements/images/figure4.png Binary files differnew file mode 100755 index 0000000..e0c96a1 --- /dev/null +++ b/docs/development/requirements/images/figure4.png diff --git a/docs/development/requirements/images/figure5.png b/docs/development/requirements/images/figure5.png Binary files differnew file mode 100755 index 0000000..4e161f4 --- /dev/null +++ b/docs/development/requirements/images/figure5.png diff --git a/docs/development/requirements/images/figure5_new.png b/docs/development/requirements/images/figure5_new.png Binary files differnew file mode 100644 index 0000000..9307aa2 --- /dev/null +++ b/docs/development/requirements/images/figure5_new.png diff --git a/docs/development/requirements/images/figure6.png b/docs/development/requirements/images/figure6.png Binary files differnew file mode 100755 index 0000000..8aeec23 --- /dev/null +++ b/docs/development/requirements/images/figure6.png diff --git a/docs/development/requirements/images/figure6_new.png b/docs/development/requirements/images/figure6_new.png Binary files differnew file mode 100644 index 0000000..5ec4b43 --- /dev/null +++ b/docs/development/requirements/images/figure6_new.png diff --git a/docs/development/requirements/images/figure7_new.png b/docs/development/requirements/images/figure7_new.png Binary files differnew file mode 100644 index 0000000..6684949 --- /dev/null +++ b/docs/development/requirements/images/figure7_new.png diff --git a/docs/development/requirements/impl_architecture.rst b/docs/development/requirements/impl_architecture.rst new file mode 100644 index 0000000..d7375d5 --- /dev/null +++ b/docs/development/requirements/impl_architecture.rst @@ -0,0 +1,313 @@ +.. 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. |
