docs/requirements/05-impl.rst

   1 Detailed architecture and message flows
   2 =======================================
   3
   4 Detailed northbound interface specification
   5 -------------------------------------------
   6
   7 .. Note::
   8    This is Work in Progress.
   9
  10 ETSI NFV IFA Information Models
  11 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  12
  13 Compute Flavor
  14 ^^^^^^^^^^^^^^
  15
  16 A compute flavor includes information about number of virtual CPUs, size of
  17 virtual memory, size of virtual storage, and virtual network interfaces
  18 [NFVIFA005]_.
  19
  20 .. figure:: images/computeflavor.png
  21    :name: computeflavor
  22    :width: 90%
  23
  24 Virtualised Compute Resources
  25 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  26
  27 Compute Capacity Management
  28 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  29
  30 Subscribe Compute Capacity Change Event
  31 _______________________________________
  32
  33 Subscription from Consumer to VIM to be notified about compute capacity changes
  34
  35 .. http:post:: /capacity/compute/subscribe
  36    :noindex:
  37
  38    **Example request**:
  39
  40    .. sourcecode:: http
  41
  42        POST /capacity/compute/subscribe HTTP/1.1
  43        Accept: application/json
  44
  45        {
  46           "zoneId": "12345",
  47           "resourceDescriptor": [
  48               {
  49                  "computeResourceTypeId": "vcInstances"
  50               }
  51           ],
  52           "threshold": [
  53               {
  54                  "capacity_info": "available",
  55                  "condition": "lt",
  56                  "value": 5
  57               }
  58           ]
  59       }
  60
  61    **Example response**:
  62
  63    .. sourcecode:: http
  64
  65        HTTP/1.1 201 CREATED
  66        Content-Type: application/json
  67
  68        {
  69           "created": "2015-09-21T00:00:00Z",
  70           "capacityChangeSubscriptionId": "abcdef-ghijkl-123456789"
  71        }
  72
  73    :statuscode 400: resourceDescriptor is missing
  74
  75 Query Compute Capacity
  76 ______________________
  77
  78 Request to find out about available, reserved, total and allocated compute capacity.
  79
  80 .. http:get:: /capacity/compute/query
  81    :noindex:
  82
  83    **Example request**:
  84
  85    .. sourcecode:: http
  86
  87       GET /capacity/compute/query HTTP/1.1
  88       Accept: application/json
  89
  90       {
  91         "zoneId": "12345",
  92         "resourceDescriptor":  {
  93              "computeResourceTypeId": "vcInstances"
  94         },
  95         "timePeriod":  {
  96              "startTime": "2015-09-21T00:00:00Z",
  97              "stopTime": "2015-09-21T00:05:30Z"
  98         }
  99       }
 100
 101    **Example response**:
 102
 103    .. sourcecode:: http
 104
 105        HTTP/1.1 200 OK
 106        Content-Type: application/json
 107
 108        {
 109           "zoneId": "12345",
 110           "lastUpdate": "2015-09-21T00:03:20Z",
 111           "capacityInformation": {
 112              "available": 4,
 113              "reserved": 17,
 114              "total": 50,
 115              "allocated": 29
 116           }
 117        }
 118
 119    :query limit: Default is 10.
 120    :statuscode 404: resource zone unknown
 121
 122 Notify Compute Capacity Change Event
 123 ____________________________________
 124
 125 Notification about compute capacity changes
 126
 127 .. http:post:: /capacity/compute/notification
 128    :noindex:
 129
 130    **Example notification**:
 131
 132    .. sourcecode:: http
 133
 134       Content-Type: application/json
 135
 136       {
 137            "zoneId": "12345",
 138            "notificationId": "zyxwvu-tsrqpo-987654321",
 139            "capacityChangeTime": "2015-09-21T00:03:20Z",
 140            "resourceDescriptor": {
 141               "computeResourceTypeId": "vcInstances"
 142            },
 143            "capacityInformation": {
 144               "available": 4,
 145               "reserved": 17,
 146               "total": 50,
 147               "allocated": 29
 148            }
 149       }
 150
 151 Compute Resource Reservation
 152 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 153
 154 Create Compute Resource Reservation
 155 ___________________________________
 156
 157 Request the reservation of compute resource capacity
 158
 159 .. http:post:: /reservation/compute/create
 160    :noindex:
 161
 162    **Example request**:
 163
 164    .. sourcecode:: http
 165
 166        POST /reservation/compute/create HTTP/1.1
 167        Accept: application/json
 168
 169        {
 170            "startTime": "2015-09-21T01:00:00Z",
 171            "computePoolReservation": {
 172                "numCpuCores": 20,
 173                "numVcInstances": 5,
 174                "virtualMemSize": 10
 175            }
 176        }
 177
 178    **Example response**:
 179
 180    .. sourcecode:: http
 181
 182        HTTP/1.1 201 CREATED
 183        Content-Type: application/json
 184
 185        {
 186           "reservationData": {
 187              "startTime": "2015-09-21T01:00:00Z",
 188              "reservationStatus": "initialized",
 189              "reservationId": "xxxx-yyyy-zzzz",
 190              "computePoolReserved": {
 191                  "numCpuCores": 20,
 192                  "numVcInstances": 5,
 193                  "virtualMemSize": 10,
 194                  "zoneId": "23456"
 195              }
 196           }
 197        }
 198
 199 and/or virtualized containers
 200
 201 .. http:post:: reservation/compute/create
 202    :noindex:
 203
 204    **Example request**:
 205
 206    .. sourcecode:: http
 207
 208        POST /reservation/compute/create HTTP/1.1
 209        Accept: application/json
 210
 211        {
 212          "startTime": "2015-10-05T15:00:00Z",
 213          "virtualizationContainerReservation": [
 214            {
 215               "containerId": "myContainer",
 216               "containerFlavor": {
 217                  "flavorId": "myFlavor",
 218                  "virtualCpu": {
 219                     "numVirtualCpu": 2,
 220                     "cpuArchitecture": "x86"
 221                  },
 222                  "virtualMemory": {
 223                      "numaEnabled": "False",
 224                      "virtualMemSize": 16
 225                  },
 226                  "virtualStorage": {
 227                      "typeOfStorage": "volume",
 228                      "sizeOfStorage": 16
 229                  }
 230               }
 231            }
 232          ]
 233        }
 234
 235    **Example response**:
 236
 237    .. sourcecode:: http
 238
 239        HTTP/1.1 201 CREATED
 240        Content-Type: application/json
 241
 242        {
 243           "reservationData": {
 244              "startTime": "2015-10-05T15:00:00Z",
 245              "reservationId": "aaaa-bbbb-cccc",
 246              "reservationStatus": "initialized",
 247              "virtualizationContainerReserved": [
 248                  {
 249                     "containerId": "myContainer",
 250                     "containerFlavor": {
 251                         "flavorId": "myFlavor",
 252                         "virtualCpu": {
 253                            "numVirtualCpu": 2,
 254                            "cpuArchitecture": "x86"
 255                         },
 256                         "virtualMemory": {
 257                            "numaEnabled": "False",
 258                            "virtualMemSize": 16
 259                         },
 260                         "virtualStorage": {
 261                             "typeOfStorage": "volume",
 262                             "sizeOfStorage": 16
 263                         }
 264                     }
 265                  }
 266              ]
 267           }
 268        }
 269
 270
 271
 272 Query Compute Resource Reservation
 273 __________________________________
 274
 275 Request to find out about reserved compute resources that the consumer has
 276 access to.
 277
 278 .. http:get:: /reservation/compute/query
 279    :noindex:
 280
 281    **Example request**:
 282
 283    .. sourcecode:: http
 284
 285       GET /reservation/compute/query HTTP/1.1
 286       Accept: application/json
 287
 288       {
 289          "queryReservationFilter": [
 290              {
 291                  "reservationId": "xxxx-yyyy-zzzz"
 292              }
 293          ]
 294
 295       }
 296
 297    **Example response**:
 298
 299    .. sourcecode:: http
 300
 301        HTTP/1.1 200 OK
 302        Content-Type: application/json
 303
 304        {
 305           "reservationData":
 306           {
 307              "startTime": "2015-09-21T01:00:00Z",
 308              "reservationStatus": "active",
 309              "reservationId": "xxxx-yyyy-zzzz",
 310              "computePoolReserved":
 311              {
 312                  "numCpuCores": 20,
 313                  "numVcInstances": 5,
 314                  "virtualMemSize": 10,
 315                  "zoneId": "23456"
 316              }
 317           }
 318        }
 319
 320    :statuscode 404: reservation id unknown
 321
 322 Update Compute Resource Reservation
 323 ___________________________________
 324 Request to update compute resource reservation
 325
 326 .. http:post:: /reservation/compute/update
 327    :noindex:
 328
 329    **Example request**:
 330
 331    .. sourcecode:: http
 332
 333        POST /reservation/compute/update HTTP/1.1
 334        Accept: application/json
 335
 336        {
 337            "startTime": "2015-09-14T16:00:00Z",
 338            "reservationId": "xxxx-yyyy-zzzz"
 339        }
 340
 341    **Example response**:
 342
 343    .. sourcecode:: http
 344
 345        HTTP/1.1 201 CREATED
 346        Content-Type: application/json
 347
 348        {
 349          "reservationData": {
 350              "startTime": "2015-09-14TT16:00:00Z",
 351              "reservationStatus": "active",
 352              "reservationId": "xxxx-yyyy-zzzz",
 353              "computePoolReserved": {
 354                  "numCpuCores": 20,
 355                  "numVcInstances": 5,
 356                  "virtualMemSize": 10,
 357                  "zoneId": "23456"
 358              }
 359           }
 360        }
 361
 362 Terminate Compute Resource Reservation
 363 ______________________________________
 364 Request to terminate a compute resource reservation
 365
 366 .. http:delete:: /reservation/compute/(reservation_id)
 367    :noindex:
 368
 369 Virtualised Network Resources
 370 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 371
 372 Network Capacity Management
 373 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 374
 375 Subscribe Network Capacity Change Event
 376 _______________________________________
 377
 378 Susbcription from Consumer to VIM to be notified about network capacity changes
 379
 380 .. http:post:: /capacity/network/subscribe
 381     :noindex:
 382
 383     **Example request**:
 384
 385     .. sourcecode:: http
 386
 387         POST /capacity/network/subscribe HTTP/1.1
 388         Accept: application/json
 389
 390         {
 391             "resourceDescriptor": [
 392                 {
 393                     "networkResourceTypeId": "publicIps"
 394                 }
 395             ],
 396             "threshold": [
 397                 {
 398                     "capacity_info": "available",
 399                     "condition": "lt",
 400                     "value": 5
 401                 }
 402             ]
 403         }
 404
 405     **Example response**:
 406
 407     .. sourcecode:: http
 408
 409         HTTP/1.1 201 CREATED
 410         Content-Type: application/json
 411
 412         {
 413            "created": "2015-09-28T00:00:00Z",
 414            "capacityChangeSubscriptionId": "bcdefg-hijklm-234567890"
 415         }
 416
 417 Query Network Capacity
 418 ______________________
 419
 420 Request to find out about available, reserved, total and allocated network capacity.
 421
 422 .. http:get:: /capacity/network/query
 423     :noindex:
 424
 425     **Example request**:
 426
 427     .. sourcecode:: http
 428
 429         GET /capacity/network/query HTTP/1.1
 430         Accept: application/json
 431
 432         {
 433             "resourceDescriptor":  {
 434                 "networkResourceTypeId": "publicIps"
 435             },
 436             "timePeriod":  {
 437                 "startTime": "2015-09-28T00:00:00Z",
 438                 "stopTime": "2015-09-28T00:05:30Z"
 439             }
 440         }
 441
 442     **Example response**:
 443
 444     .. sourcecode:: http
 445
 446         HTTP/1.1 200 OK
 447         Content-Type: application/json
 448
 449         {
 450             "lastUpdate": "2015-09-28T00:02:10Z",
 451             "capacityInformation": {
 452                 "available": 4,
 453                 "reserved": 10,
 454                 "total": 64,
 455                 "allocated": 50
 456             }
 457         }
 458
 459 Notify Network Capacity Change Event
 460 ____________________________________
 461
 462 Notification about network capacity changes
 463
 464 .. http:post:: /capacity/network/notification
 465     :noindex:
 466
 467     **Example notification**:
 468
 469     .. sourcecode:: http
 470
 471         Content-Type: application/json
 472
 473         {
 474             "notificationId": "yxwvut-srqpon-876543210",
 475             "capacityChangeTime": "2015-09-28T00:02:10Z",
 476             "resourceDescriptor": {
 477                 "networkResourceTypeId": "publicIps"
 478             },
 479             "capacityInformation": {
 480                 "available": 4,
 481                 "reserved": 10,
 482                 "total": 64,
 483                 "allocated": 50
 484             }
 485         }
 486
 487 Network Resource Reservation
 488 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 489
 490 Create Network Resource Reservation
 491 ___________________________________
 492
 493 Request the reservation of network resource capacity and/or virtual networks, network ports
 494
 495 .. http:post:: /reservation/network/create
 496     :noindex:
 497
 498     **Example request**:
 499
 500     .. sourcecode:: http
 501
 502         POST /reservation/network/create HTTP/1.1
 503         Accept: application/json
 504
 505         {
 506             "startTime": "2015-09-28T01:00:00Z",
 507             "networkReservation": {
 508                 "numPublicIps": 2
 509             }
 510         }
 511
 512     **Example response**:
 513
 514     .. sourcecode:: http
 515
 516         HTTP/1.1 201 CREATED
 517         Content-Type: application/json
 518
 519         {
 520             "reservationData": {
 521                 "startTime": "2015-09-28T01:00:00Z",
 522                 "reservationStatus": "initialized",
 523                 "reservationId": "wwww-xxxx-yyyy",
 524                 "networkReserved": {
 525                     "publicIps": [
 526                         "10.2.91.60",
 527                         "10.2.91.61"
 528                     ]
 529                 }
 530             }
 531         }
 532
 533 Query Network Resource Reservation
 534 __________________________________
 535
 536 Request to find out about reserved network resources that the consumer has access to.
 537
 538 .. http:get:: /reservation/network/query
 539     :noindex:
 540
 541     **Example request**:
 542
 543     .. sourcecode:: http
 544
 545         GET /reservation/network/query HTTP/1.1
 546         Accept: application/json
 547
 548         {
 549             "queryReservationFilter": [
 550                 {
 551                     "reservationId": "wwww-xxxx-yyyy"
 552                 }
 553             ]
 554         }
 555
 556     **Example response**:
 557
 558     .. sourcecode:: http
 559
 560        HTTP/1.1 200 OK
 561        Content-Type: application/json
 562
 563        {
 564            "reservationData": {
 565                "startTime": "2015-09-28T01:00:00Z",
 566                "reservationStatus": "active",
 567                "reservationId": "wwww-xxxx-yyyy",
 568                "networkReserved": "publicIps": [
 569                    "10.2.91.60",
 570                    "10.2.91.61"
 571                ]
 572            }
 573        }
 574
 575 Update Network Resource Reservation
 576 ___________________________________
 577
 578 Request to update network resource reservation
 579
 580 .. http:post:: /reservation/network/update
 581     :noindex:
 582
 583     **Example request**:
 584
 585     .. sourcecode:: http
 586
 587          POST /reservation/network/update HTTP/1.1
 588          Accept: application/json
 589
 590          {
 591              "startTime": "2015-09-21T16:00:00Z",
 592              "reservationId": "wwww-xxxx-yyyy"
 593          }
 594
 595     **Example response**:
 596
 597     .. sourcecode:: http
 598
 599         HTTP/1.1 201 CREATED
 600         Content-Type: application/json
 601
 602         {
 603             "reservationData": {
 604                 "startTime": "2015-09-21T16:00:00Z",
 605                 "reservationStatus": "active",
 606                 "reservationId": "wwww-xxxx-yyyy",
 607                 "networkReserved": {
 608                     "publicIps": [
 609                         "10.2.91.60",
 610                         "10.2.91.61"
 611                      ]
 612                 }
 613             }
 614         }
 615
 616 Terminate Network Resource Reservation
 617 ______________________________________
 618 Request to terminate a network resource reservation
 619
 620 .. http:delete:: /reservation/network/(reservation_id)
 621     :noindex:
 622
 623 Virtualised Storage Resources
 624 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 625
 626 Storage Capacity Management
 627 ^^^^^^^^^^^^^^^^^^^^^^^^^^^
 628
 629 Subscribe Storage Capacity Change Event
 630 _______________________________________
 631
 632 Subscription from Consumer to VIM to be notified about storage capacity changes
 633
 634 .. http:post:: /capacity/storage/subscribe
 635     :noindex:
 636
 637     **Example request**:
 638
 639     .. sourcecode:: http
 640
 641         POST /capacity/storage/subscribe HTTP/1.1
 642         Accept: application/json
 643
 644         {
 645            "resourceDescriptor": [
 646                {
 647                    "storageResourceTypeId": "volumes"
 648                }
 649            ],
 650            "threshold": [
 651                {
 652                    "capacity_info": "available",
 653                    "condition": "lt",
 654                    "value": 3
 655                }
 656            ]
 657         }
 658
 659     **Example response**:
 660
 661     .. sourcecode:: http
 662
 663         HTTP/1.1 201 CREATED
 664         Content-Type: application/json
 665
 666         {
 667             "created": "2015-09-28T12:00:00Z",
 668             "capacityChangeSubscriptionId": "cdefgh-ijklmn-345678901"
 669         }
 670
 671 Query Storage Capacity
 672 ______________________
 673
 674 Request to find out about available, reserved, total and allocated storage capacity.
 675
 676 .. http:get:: /capacity/storage/query
 677     :noindex:
 678
 679     **Example request**:
 680
 681     .. sourcecode:: http
 682
 683         GET /capacity/storage/query HTTP/1.1
 684         Accept: application/json
 685
 686         {
 687             "resourceDescriptor": {
 688                 "storageResourceTypeId": "volumes"
 689             },
 690             "timePeriod":  {
 691                 "startTime": "2015-09-28T12:00:00Z",
 692                 "stopTime": "2015-09-28T12:04:45Z"
 693             }
 694         }
 695
 696     **Example response**:
 697
 698     .. sourcecode:: http
 699
 700        HTTP/1.1 200 OK
 701        Content-Type: application/json
 702
 703        {
 704            "lastUpdate": "2015-09-28T12:01:35Z",
 705            "capacityInformation": {
 706                "available": 2,
 707                "reserved": 4,
 708                "total": 10,
 709                "allocated": 4
 710            }
 711        }
 712
 713 Notify Storage Capacity Change Event
 714 ____________________________________
 715
 716 Notification about storage capacity changes
 717
 718 .. http:post:: /capacity/storage/notification
 719     :noindex:
 720
 721     **Example notification**:
 722
 723     .. sourcecode:: http
 724
 725         Content-Type: application/json
 726
 727         {
 728             "notificationId": "xwvuts-rqponm-765432109",
 729             "capacityChangeTime": "2015-09-28T12:01:35Z",
 730             "resourceDescriptor": {
 731                 "storageResourceTypeId": "volumes"
 732             },
 733             "capacityInformation": {
 734                 "available": 2,
 735                 "reserved": 4,
 736                 "total": 10,
 737                 "allocated": 4
 738             }
 739        }
 740
 741 Storage Resource Reservation
 742 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 743
 744 Create Storage Resource Reservation
 745 ___________________________________
 746
 747 Request the reservation of storage resource capacity
 748
 749 .. http:post:: /reservation/storage/create
 750     :noindex:
 751
 752     **Example request**:
 753
 754     .. sourcecode:: http
 755
 756         POST /reservation/storage/create HTTP/1.1
 757         Accept: application/json
 758
 759         {
 760             "startTime": "2015-09-28T13:00:00Z",
 761             "storagePoolReservation": {
 762                 "storageSize": 10,
 763                 "numSnapshots": 3,
 764                 "numVolumes": 2
 765             }
 766         }
 767
 768     **Example response**:
 769
 770     .. sourcecode:: http
 771
 772         HTTP/1.1 201 CREATED
 773         Content-Type: application/json
 774
 775         {
 776             "reservationData": {
 777                 "startTime": "2015-09-28T13:00:00Z",
 778                 "reservationStatus": "initialized",
 779                 "reservationId": "vvvv-wwww-xxxx",
 780                 "storagePoolReserved": {
 781                     "storageSize": 10,
 782                     "numSnapshots": 3,
 783                     "numVolumes": 2
 784                 }
 785             }
 786         }
 787
 788 Query Storage Resource Reservation
 789 __________________________________
 790 Request to find out about reserved storage resources that the consumer has access to.
 791
 792 .. http:get:: /reservation/storage/query
 793     :noindex:
 794
 795     **Example request**:
 796
 797     .. sourcecode:: http
 798
 799         GET /reservation/storage/query HTTP/1.1
 800         Accept: application/json
 801
 802         {
 803             "queryReservationFilter": [
 804                 {
 805                     "reservationId": "vvvv-wwww-xxxx"
 806                 }
 807             ]
 808         }
 809
 810     **Example response**:
 811
 812     .. sourcecode:: http
 813
 814         HTTP/1.1 200 OK
 815         Content-Type: application/json
 816
 817         {
 818             "reservationData": {
 819                 "startTime": "2015-09-28T13:00:00Z",
 820                 "reservationStatus": "active",
 821                 "reservationId": "vvvv-wwww-xxxx",
 822                 "storagePoolReserved": {
 823                     "storageSize": 10,
 824                     "numSnapshots": 3,
 825                     "numVolumes": 2
 826                 }
 827             }
 828         }
 829
 830 Update Storage Resource Reservation
 831 ___________________________________
 832
 833 Request to update storage resource reservation
 834
 835 .. http:post:: /reservation/storage/update
 836     :noindex:
 837
 838     **Example request**:
 839
 840     .. sourcecode:: http
 841
 842         POST /reservation/storage/update HTTP/1.1
 843         Accept: application/json
 844
 845        {
 846             "startTime": "2015-09-20T23:00:00Z",
 847             "reservationId": "vvvv-wwww-xxxx"
 848        }
 849
 850     **Example response**:
 851
 852     .. sourcecode:: http
 853
 854         HTTP/1.1 201 CREATED
 855         Content-Type: application/json
 856
 857         {
 858             "reservationData": {
 859                 "startTime": "2015-09-20T23:00:00Z",
 860                 "reservationStatus": "active",
 861                 "reservationId": "vvvv-wwww-xxxx",
 862                 "storagePoolReserved": {
 863                     "storageSize": 10,
 864                     "numSnapshots": 3,
 865                     "numVolumes": 2
 866                 }
 867             }
 868         }
 869
 870 Terminate Storage Resource Reservation
 871 ______________________________________
 872 Request to terminate a storage resource reservation
 873
 874 .. http:delete:: /reservation/storage/(reservation_id)
 875     :noindex:
 876
 877 Detailed Message Flows
 878 ----------------------
 879
 880 Resource Capacity Management
 881 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 882
 883 .. figure:: images/figure5.png
 884     :name: figure5
 885     :width: 90%
 886
 887     Capacity Management Scenario
 888
 889 :numref:`figure5` shows a detailed message flow between the consumers and the
 890 functional blocks inside the VIM and has the following steps:
 891
 892 Step 1: The consumer subscribes to capacity change notifications
 893
 894 Step 2: The Capacity Manager monitors the capacity information for the various
 895 types of resources by querying the various Controllers (e.g. Nova, Neutron,
 896 Cinder), either periodically or on demand and updates capacity information in
 897 the Capacity Map
 898
 899 Step 3: Capacity changes are notified to the consumer
 900
 901 Step 4: The consumer queries the Capacity Manager to retrieve capacity detailed
 902 information
 903
 904 Resource Reservation
 905 ~~~~~~~~~~~~~~~~~~~~
 906
 907 .. figure:: images/figure6.png
 908     :name: figure6
 909     :width: 90%
 910
 911     Resource Reservation for Future Use Scenario
 912
 913 :numref:`figure6` shows a detailed message flow between the consumers and
 914 the functional blocks inside the VIM and has the following steps:
 915
 916 Step 1: The consumer creates a resource reservation request for future use by
 917 setting a start and end time for the allocation
 918
 919 Step 2: The consumer gets an immediate reply with a reservation status message
 920 "reservationStatus" and an identifier to be used with this reservation instance
 921 "reservationID"
 922
 923 Step 3: The consumer subscribes to reservation notification events
 924
 925 Step 4: The Resource Reservation Manager checks the feasibility of the
 926 reservation request by consulting the Capacity Manager
 927
 928 Step 5: The Resource Reservation Manager reserves the resources and stores the
 929 list of reservations IDs generated by the Controllers (e.g. Nova, Neutron,
 930 Cinder) in the Reservation Map
 931
 932 Step 6: Once the reservation process is completed, the VIM sends a notification
 933 message to the consumer with information on the reserved resources
 934
 935 Step 7: When start time arrives, the consumer creates a resource allocation
 936 request.
 937
 938 Step 8: The consumer gets an immediate reply with an allocation status message
 939 "allocationStatus".
 940
 941 Step 9: The consumer subscribes to allocation notification events
 942
 943 Step 10: The Resource Allocation Manager allocates the reserved resources. If
 944 not all reserved resources are allocated before expiry, the reserved resources
 945 are released and a notification is sent to the consumer
 946
 947 Step 11: Once the allocation process is completed, the VIM sends a notification
 948 message to the consumer with information on the allocated resources