cord: multi-access edge cloud...cord is a multi-access edge cloud • built using commodity servers...
TRANSCRIPT
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CORD:Multi-AccessEdgeCloud– BuildinganExtensibleEdgePlatform–
LarryPeterson
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CORDisamulti-accessedgecloud• Builtusingcommodity serversandwhite-boxswitches/accessdevices(PON,RAN)• RunsbothscalablecloudservicesanddisaggregatedTelcoservices(BNG,EPC)
• Configured asBasePlatform+ OneormoreServiceProfiles
XOSisaframeworkforconfiguringandoperatingacloudplatform• Decouples ServiceControlPlaneandServiceDataPlane• Generatesthecontrolplanefromasetofdeclarativemodels
CORDandXOSareopensourceprojectsoftheONF• Workingwithnetworkoperatorstotakethesetechnologies toproduction
Background
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PublicClouds
Users
EdgeCloud
CORD– ReinventingtheNetworkEdge
TelcoCloud
WhiteBoxPeripherals
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DataCenter
WANRouters
SwitchingFabric
ComputeStorage
DataCenter
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I/O I/O
Multi-AccessEdge
PON
RAN
Core
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CORDSoftwareStackReferenceDesign– Multi-AccessEdgeCloud
CloudOrchestrator
Ceilometer vSG vCDN
Servers/Accelerators
VNF2 VNF3VNF1
GlobalAutomation
SDNController
Leaf-SpineFabric
vSGOverlay vSGFabric vSGVNF4 vSGVNF5
TelcoCloud vSG
RAN ControllerPONController
OLT BBU
AccessPeripherals
vSGSD-PON vSGSD-RAN
LocalServiceControl
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CORDSoftwareStack
Openstack/Kubernetes
Ceilometer vSG vCDN
OCPServers
ONOS
OCPSwitches(+P4Runtime)
ONOS
OCPOLT BBU
AccessPeripherals
ExemplarPlatform– CORD
vEPC …vSG
vSGVTN vSGFabric vSGvRouter vSG…
vSGvOLT vSGvRAN
TelcoCloud
GlobalAutomation
XOS
vSG
ONOS
VOLTHA
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Disaggregation–Micro-Services&SDNAppliedtotheCentralOffice–
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LegacyCentralOffice
Residence Central Office
CPE ONU OLT ETHAGG BNG
BackboneNetwork
CPE– CustomerPremisesEquipmentOLT– OpticalLineTerminationBNG– BroadbandNetworkGateway
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Disaggregation
CPE– CustomerPremisesEquipmentOLT– OpticalLineTerminationBNG– BroadbandNetworkGateway
Residence Central Office
CPE ONU OLT ETHAGG BNG
BackboneNetwork
vSG
vOLT
vRouter
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Disaggregation
CPE– CustomerPremisesEquipmentOLT– OpticalLineTerminationBNG– BroadbandNetworkGateway
Residence Central Office
CPE ONU OLTBackboneNetwork
vSG
vOLT
vRouter
SwitchingFabric
BNGETHAGG
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CORD Controller
vOLT
Controller
vSG
Controller
vRouterR-CORD
Controller
Controller
vCDN
Controller
OpenStack ONOS
Controller
ServiceGraphforResidentialCORD
Controller
FunctionalSpecification
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CORD– AnExtensiblePlatform– ConfiguringandControllinganIntegratedSystem–
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CORD
UseCases(Trials)
ExtensiblePlatform
BuildingBlocks
Challenge
VOLTHA xRAN Fabric vEPC vRouter …
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LifecycleManagement
XOS
CtrlAppCtrlAppCtrlAppCtrlAppCtrlAppCtrlApp
CtrlAppCtrlAppCtrlAppCtrlAppCtrlAppVNF
OCPHardware
ONOS Kubernetes(OpenStack)
AutomatedConfigurationWorkflow
Protobuf (xproto)Models
TOSCAWorkflows– Provision &Configure Services– RuntimeOperation
– SchemathatModelServices– CoresetLoadedatBootTime– DynamicallyUpdatedatRuntime
HelmCharts– Containers thatImplementServices– CoresetLoadedatBootTime– DynamicallyUpdatedatRuntime
Kubernetes (OptionallyMaaS)
CORDPOD
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LifecycleManagementXOSisresponsibleforServiceControlPlane
• Support forconfiguringandcontrollingservices• Support forincrementalupgrades (transitioning state/interfaces)
Kubernetes isresponsibleforServiceDataPlane• Support forimplementing services(scaleup/down, HA)• Support forincrementalupgrades (rollout/rollback)
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OperationalView
XOS
OCPHardware
Operators
Telemetry/DiagnosticData
Configure/ProvisionControl
(Self-ServicePortal)
Subscribers
DataPlane
XOSprovidesVisibilityandControlatthegranularity ofper-subscriberservicechains.
Cloud-basedAutomation
Tools
…aPaaS forServiceChains– Provision– Isolate– Distribute– Migrate
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MobileCloud– ValueofServiceChains–
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What’sDifferentabout5G?Earliergenerationswereaboutimprovingbroadbandtechnology
5Gisfundamentallyaboutsupportingnewservices• Internet-of-Things• ImmersiveUIs• PublicSafety
Whatuniquecapabilitydoesthemobileaccessnetworkoffer?• Low-latencyproximitytoend-users• Intrinsicsupport formobility
Challengeof5GistoSimultaneouslySupport…• LowLatency– Moving functionality totheedge,closertodevices• Mobility– Accessingthatedgefunctionalitywhilecontinuing tobemobile
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ChallengeCentralChallengeof5GistoSimultaneouslySupport…
• LowLatency– Moving functionality totheedge,closertodevices.• Mobility– Accessingthatedgefunctionalitywhilecontinuing tobemobile.
OtherFactors…• Performancedictatesthatfunctionalitybeimplemented inthemostappropriatehardware(e.g.,GPUs,SwitchingFabric).
• Autonomy dictatesthatdifferent stakeholderswillberesponsible forcontrolling andmanagingdifferentcomponents.
• Monetizationdictatestheneedtoofferdifferentiatedservicestodifferentclassesofsubscribers/applications.
• Costsdictatesadistributedsolution, withsomefunctions running inthedatacentersandsomerunning inascalablenumberofedgesites.
• Dynamicitydictatestheneedforlocal(edge)controlwithtightcontrolloops.20
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MobileBroadband(2G– 4G)
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Datacenter
Access-Edge
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MoveFunctionalitytotheEdge
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Datacenter
Access-Edge
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MobileCloud(5G)
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Datacenter
Access-Edge
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MobileCloud(5G)
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Datacenter
Access-Edge
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RequirementsHeterogeneous– RangeoffunctionalelementimplementationsMulti-Tenant– MultiplestakeholdersmanagingfunctionalelementsDistributed– FunctionalelementsspanmultiplecloudsIsolation– DifferentiatedresourceallocationbetweenservicechainsMobility– Moveservicechainsfromoneedgecloudtoanother
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XOSOverview– APaaS forServiceChains–
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CORDInnovationsVirtualizationandDisaggregation
• Pre-requisiteformovingfunctionalitytotheedge• Abilitytorunfunctionalityinbothswitchesandservers
ExplicitSupportforServiceChains• Afirstclassabstractionthatdefinesacontrolframework• Operationstoprovision,distribute,isolate,andmigrate
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WhatisXOS?
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xproto – Adeclarativelanguageforspecifyingmodels• ProtocolBuffers:extendedtosupport inheritance,relationships, andpredicates
xosgenx– Anextensibletoolchain toenforcemodelsonanoperationalsystem• Targets:APIs,AccessControl,ORM,SynchronizerFramework,…
core.xproto – Adefault(andmalleable)setofcoremodels• Models:Service,ServiceDependency, ServiceInstance,ServiceInstanceLink,…
Chart.yaml – AHelmChart(plussetofcontainerimages)todeployXOS• Micro-services:xos-core,xos-gui,xos-tosca,xos-db,xos-ws,redis,…
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LocalServiceControl(XOS)
Backend ServicesandResources
GUI RESTAPI TOSCA …
XOSCore DBEvent
Bus
Views(UIs)
DataModel
Synchronizers
XOSConstructedfromMicro-Services
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policygrant_policy <ctx.user.is_admin|existsPrivilege:Privilege.object_type =obj.object_type&Privilege.object_id =obj.object_id&Privilege.accessor_type ="User"&Privilege.accessor_id =ctx.user.id&Privilege.permission ="role:admin" >
message Privilege::grant_policy (XOSBase){required int32 accessor_id =1 [null=False];required string accessor_type =2 [null=False,max_length=1024];required int32 controller_id =3 [null=True];required int32 object_id =4 [null=False];required string object_type =5 [null=False,max_length=1024];required string permission=6 [null=False,default="all",max_length=1024];required string granted=7 [content_type ="date",auto_now_add =True,max_length=1024];required string expires=8 [content_type ="date",null=True,max_length=1024];}
ExampleModelandPolicy
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GUI RESTAPI …TOSCA
XOSCore DBEvent
Bus
Sync Sync Sync Sync
GeneratedCode– APITests– Northbound Interfaces– EnforceSecurityPolicy– ObjectRelationMapper– SynchronizerFramework
XOSGenerativeToolchain
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CoreModels
Controller
Service
Slice
Instance
ServiceInstanceServiceInstanceServiceInstanceServiceInstance
Slice
InstanceInstance
Slice
ComputeInstanceCompute
InstanceComputeInstance
(Resources)
(Control)
Controller
Service
Slice
Instance
ServiceInstanceServiceInstanceServiceInstanceServiceInstance
Slice
InstanceInstance
Slice
(Resources)
(Control)
ONOS
Ctl App
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CoreModels
Controller
Service
ServiceInstanceServiceInstanceServiceInstanceServiceInstance
(Distributed, Layered,andCompositeServices)
(Control)
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ServiceControlandDataPlanes
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FunctionalElements
ServiceGraph
ServiceControlPlane
ServiceDataPlane
Controller Controller
Controller
Controller Controller
A B
C
D E
LegacyVNFRunningin
aVM
HorizontallyScalable
Micro-Service
SDNControlApp
ContainerPer
Subscriber…
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ServiceGraphandServiceChains
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ServiceChains
Controller Controller
Controller
Controller Controller
A B
C
D E
Subscriber 1Subscriber 2
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ControllerControllerController
ServiceGraph– ResidentialCase
ServiceInstanceServiceInstanceServiceInstanceServiceInstance
ServiceInstanceServiceInstanceServiceInstanceServiceInstance
ServiceGraph
vOLT vSG vRouter
Controller
ServiceInstanceServiceInstanceServiceInstanceServiceInstance
R-CORD
ServiceChain=Atthegranularityofsubscribers(orsubscriberclasses)
SubscriberSubscriber
SubscriberCORDSubscriber
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Controller
ServiceGraph– MobileCase
Controller
vHSS
eNBController
SPGWControl
Controller
vMME
Controller
vSPGW-c
Controller
vSPGW-u
CompositeServices
NetworkSlicing
EPC-as-a-Service
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Controller
ServiceGraph– MobileCase
Controller
vHSS
eNBController
vSPGW-u
Controller
vMME
Controller
vSPGW-cCompositeServices
NetworkSlicing
EPC-as-a-Service
Off-loadVNFs(tofabric)
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ConclusionCORDisaMulti-AccessEdgeCloud
• IncludesbothAccess-as-a-ServiceandSoftware-as-a-Service• UsesMerchantSiliconandFunctionDisaggregation
XOSisaFrameworkforConfiguringandOperatingaCloudPlatform• Supports ServicesasaUnifyingAbstraction(implementation agnostic)• DecouplesServiceControlPlaneandServiceDataPlane• UsesDeclarativeModelsandGenerativeToolchain toSpecify&EnforceBehavior
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ConclusionCORDintegratesAccess-as-a-Serviceintoamulti-tenantcloudplatform
• Disaggregatedfunctionality withamixofserver- andswitch-basedimplementations
XOSintegratesthedisaggregatedcomponentsintoacoherentwhole(PaaS)• Programmable frameworkwithvisibilityandcontrolatthegranularityof subscribers
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Conclusion
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COMPUTEINFRASTRUCTURE
NETWORKINGFABRIC
ACCESSNODES
XOS
VMs Containers
OpenStack KubernetesONOS
VOLTHA
ONOS
VOLT
xRAN
ProgRA
N
IaaSAPIsNaaS APIs
vRouter
AaaS APIs
PaaSAPIs
IoTService AnalyticsService LowLatencyService ResidentialService MobileBBService
SaaSAPIs
RANOLT
MCast
Trellis
DHCP