Summary: Edge ScopingArchitecture & Work Items#ONAPEdgeMVP
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Distributed Edge Cloud Infrastructure Object Hierarchy (Stretch Goal - Beyond Casablanca)
Value:
- Fine grained resource management & analytics for Distributed Edge Clouds
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Improve "workload deployability" by avoiding exposure of "cloud specific" capabilities to several ONAP components and addressing "separation of concerns" Support capacity check (besides capability check) for HPA resources
Applicable to all workloads - VM-based or Container-based
Jira server ONAP JIRA serverId 425b2b0a-557c-3c0c-b515-579789cceedb key MULTICLOUD-272
Phase 1 (Casablanca MVP) Summary:
- Multi-Cloud Policy Framework
- Assist OOF in target cloud region selection for VNF placement (aka homing) by summarizing cloud-specific capability, capacity & cost metrics (e.g. VMs could have different cost in different clouds, Infra HA for VMs in a VNF could have different cost in different clouds)through intent
Cloud Agnostic Intent (Policy) Execution Workflow - Steps 1- 64
- Dynamically modify the cloud specific VNF deployment template based on cloud-specific realization of the specified intent (e.g. Infra HA for VMs within a VNF could have different realizations across different clouds)
Cloud Agnostic Intent (Policy) Execution Workflow - Step 75
- Assist OOF in target cloud region selection for VNF placement (aka homing) by summarizing cloud-specific capability, capacity & cost metrics (e.g. VMs could have different cost in different clouds, Infra HA for VMs in a VNF could have different cost in different clouds)through intent
Intent Support
Single realization option per Cloud Region for the specified Intent
- Major Impact Projects:
- Multi-Cloud (Highest), OOF
- A&AI, SO (Minimal)
- End-to-end use case demonstration:
- vCPE (no additional implementation dependency), vDNS
Phase 2 Summary (Build on Phase 1 Work):
- Multi-Cloud Policy Framework
- Dynamically modify the cloud specific VNF deployment template based on cloud-specific realization of the specified intent – Impact to VNF configuration
- E.g. High performance Intra-DC data plane networking with several realization choices
- Dynamically modify the cloud specific VNF deployment template based on cloud-specific realization of the specified intent – Impact to VNF configuration
- Intent Support
- Multiple realization options per Cloud Region for the specified Intent
- Major Impact Projects:
- Multi-Cloud
- Minor Impact Projects:
- OOF, GNF Controller
References:
The sequence diagram below expands "Multi-Cloud/VNFM Deploy Apps" in Edge Scoping Sequence Diagram
Cloud Agnostic Intent (Policy) Execution Workflow Summary:
Gliffy Diagram | ||||||
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- Types of intent supported (through OOF Policy)
- "Infrastructure High Availability for VNF"
- "Infrastructure Resource Isolation for VNF": "Burstable QoS"
- "Infrastructure Resource Isolation for VNF": "Guaranteed QoS"
- Related Specs/Jiras:
- OOF
- SO
- SO Casablanca HPA design spec with cloud agnostic intent -- https://wiki.onap.org/display/DW/SO+Casablanca+HPA+Design
- Multi-Cloud
- Generic API for SO to talk to different Multi cloud plugins to be updated with cloud agnostic intent -- https://gerrit.onap.org/r/#/c/60691/
- HPA Cloud specific (flavor etc.) Mapping for R3 – HPA Policies and Mappings
- Intent Cloud specific (flavor etc.) Mapping for R3 – Cloud Agnostic Intent and Mappings
- End-to-end use case
- Support homing through OOF for vFW, vDNS –
Jira server ONAP JIRA serverId 425b2b0a-557c-3c0c-b515-579789cceedb key SO-745
- Support homing through OOF for vFW, vDNS –
- Useful Links:
- R2 HPA Integration testing – vCPE Use Case + OOF + HPA Tutorial: Design and Deploy based on ONAP#PrepareHEATtemplates
Phase 2 (Casablanca Stretch Goal) Summary (Build on Phase 1 Work):
- Multi-Cloud Policy Framework
- Dynamically modify the cloud specific VNF deployment template based on cloud-specific realization of the specified intent – Impact to VNF configuration
- E.g. High performance Intra-DC data plane networking with several realization choices
- Dynamically modify the cloud specific VNF deployment template based on cloud-specific realization of the specified intent – Impact to VNF configuration
- Intent Support
- Multiple realization options per Cloud Region for the specified Intent
- Major Impact Projects:
- Multi-Cloud
- Minor Impact Projects:
- SO, OOF, GNF Controller
- Wiki Link:
References:
The sequence diagram below expands "Multi-Cloud/VNFM Deploy Apps" in Edge Architecture & Work Items Sequence Diagram
Cloud Agnostic Intent (Policy) Workflow Summary (Phase 1 - Casablanca MVP):
Gliffy Diagram size 1200 name Cloud Agnostic Intent Execution Workflow pagePin 42
Cloud Agnostic Intent (Policy) Workflow Details (Phase 1 - Casablanca MVP):
Private Cloud Setup - OpenStack-based
- Pre-defined (including custom) flavors map to Instance types in Public Clouds
- Pre-defined flavors are created by the Cloud Admin before the Cloud is used by ONAP for workload deployment
- VMware VIO Configuration for Min Guarantee feature
- Create necessary tenants per <cloud owner, cloud region>
- Mapping of VNFC, VNF (VF module), Service (e.g. vCPE) to the corresponding tenant happens in the respective Multi-Cloud plugin.
VNFC to Instance Type Mapping
- One or more VNFCs (e.g. vCPE VGW) could map to an Instance Type
- Use Case: Residential Broadband vCPE (Approved)
- OpenStack-based Clouds
- Instance type maps to pre-defined Flavors
- Microsoft Azure
- Pre-defined Instance Types
Step
Follow ups:
- Policy DB – is there any restriction on json objects store?
- Matti to follow up with Ankit
- Intent – "Infrastructure Resource Isolation for VNF" – { "qosProperty": { {"Burstable QoS": "TRUE", "Burstable QoS Oversubscription Percentage": "25"} } }
- Only certain pre-defined over-subscription values are allowed to simplify implementation
Private Cloud Setup - OpenStack-based
- Pre-defined (including custom) flavors map to Instance types in Public Clouds
- Pre-defined flavors are created by the Cloud Admin before the Cloud is used by ONAP for workload deployment
- VMware VIO Configuration for Min Guarantee feature
VNFC to Instance Type Mapping
- One or more VNFCs (e.g. vCPE VGW) could map to an Instance Type
Operator Configuration – Multi-VIM/Cloud Plugin
The operator/service provider who uses ONAP will choose which VIMs to use and include the appropriate MultiVIM plugins in his ONAP deployment. For example, let’s assume they pick private Openstack, private VMWare, and public Azure as the platform to run their services on.
For each MultiVIM plugin, operator configures the following information:
- For each Instance Type, the cost of that VM to the operator. Note that this costs includes the (potentially discounted) list price for the VM, support cost, and operations cost. The last one is definitely operator specific.
- Operator also specify the cost for each feature: HA, etc
- Note that the operator is free to choose what time duration the cost metric is specified for each of the MultiVIM plugins (e.g., cost per hour, cost per month) since they will do it consistently for each of the VIMs.
Workflow Details
1. SO → OOF - Get Target <Cloud Owner, Cloud Region> for the Service Instances (no code changes for R3)
Step 2. OOF → Policy - Fetch
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Cloud Selection Policy for Homing
2a) OOF Processing - the fetched Policy (example below) is stored in a local data structure and is available for further use (need OOF code changes for R3).
OOF Homing Enhanced Cloud Selection Policy based on Intent -- Schema with Use Case Examples as runnable python code:
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{
"service": "cloudSelectionPolicy",
"policyName": "oofMulti-cloudCasablanca.cloudSelectionPolicy_vCPE_VNF",
"description": "Cloud Selection Policy for vCPE VNFs",
"templateVersion": "0.0.1",
"version": "oofMulti-cloudCasablanca",
"priority": "3",
"riskType": "test",
"riskLevel": "2",
"guard": "False",
"content":
{
{
"cloudOwner": "All", //can be a specific cloud owner such as Azure, VMware VIO, Wind River Titanium Cloud etc.
"cloudRegion": "All", //can be a specific cloud region for a cloud owner
"capacityCheck": "TRUE", //perform capacity check per <cloud owner, cloud region>
"dollarCostEvaluationVM-Type": "TRUE", //evaluate dollar cost per VM type if operator has configured a policy
"dollarCostEvaluationVM-FeatureGroup": "TRUE" //evaluate dollar per feature/group of features if operator has configured a policy
},
}
"resources": ["vgw", "vgmux"], //"vgw" is also interchangeably used as "vg"
"applicableResources": "any",
"identity": "cloud-atrributes",
"policyScope": ["vCPE", "US", "INTERNATIONAL", "ip", "vgw", "vgmux"],
"policyType": "AllPolicy"
} |
3. OOF → A&AI - Fetch Cloud-Agnostic (Standardized) Capabilities for the Service Instance
3a) OOF Processing - Perform Cloud Agnostic Capability check for each <cloud owner, cloud region>
4. OOF → MC - Push Cloud Agnostic Policy for the Service Instance - perform Cloud Specific Check (capability/capacity/cost metrics) for each registered Cloud Region in Multi-Cloud
4a) OOF Processing
The enhanced OOF ↔ MC capacity check API, described below, is filled based on the enhanced Capacity Check & Cloud Selection Policy for Homing retrieved in step 2) – need OOF code changes.
Code Block | ||||||||||
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//flexibility of having cloud owner and region in the new API provides fine grained control, addresses capacity/cost differences across different //cloud owners/regions and ensures backward compatibility
OOF -> MC
{
"VNFC": "vgw", //"vgw" is also intechangeably used as "vg" //new in R3
{ //new in R3
"cloudOwner": "All", //can be a specific cloud owner such as Azure, VMware VIO, Wind River Titanium Cloud etc.
"cloudRegion": "All", //can be a specific cloud region for a cloud owner
"dollarCostEvaluationVM-Type": "TRUE", //evaluate dollar cost per VM type if operator has configured a policy
"dollarCostEvaluationVM-FeatureGroup": "TRUE" //evaluate dollar per feature/group of features if operator has configured a policy
},
{
"cloudOwner": "OpenStack", // new in R3,
// different cloud owners may need different capacities for the same VNFC because of implementation differences
"cloudRegion": "All", // new in R3,
// different cloud regions for a cloud owner may need different capacities for the same VNFC due to different SW
// versions and HW configuration
"capacityProperty": //same as R2, presence of this means capacity check needs to be done for the <cloud owner, cloud region>
{
"request":
"{\"vCPU\": {\"quantity\": {\"get_param\": \"REQUIRED_VCPU\"}, \"Memory\": {\"quantity\": {\"get_param\": \"REQUIRED_MEM\"},
\"unit\": \"GB\"}, \"Storage\": {\"quantity\": {\"get_param\": \"REQUIRED_DISK\"}, \"unit\": \"GB\"}}"
}
},
}
//return netValue per <cloud owner, cloud region>
//cloud regions which fail capacity check are not in this list
MC -> OOF
{
{
"cloudOwner": "OpenStack",
"cloudRegion": "1",
"netValue": "99"
},
{
"cloudOwner": "VIO",
"cloudRegion": "5",
"netValue": "100"
},
{
"cloudOwner": "Azure",
"cloudRegion": "3",
"netValue": "101"
},
} |
5a) MC Processing (need MC code changes)
For each cloud owner
- Instance Type Handling
- Instance Type is passed in the capacity check API from OOF (Discuss) //Note, SO → MC passes OpenStack flavor name in the Heat Template/Env file
- Convert to appropriate instance type based on intent //e.g. "Infrastructure Resource Isolation for VNF" may result in a different instance type if the cloud owner supports "Burstable QoS"
- Parse OOF → MC Policy API
- For each cloud region // Public cloud could have different costs in different geographic locations
- net_value_cost = net_value_cost + cost_instance_type // cost per instance type is based on policy (for R3, it is picked up from Multi Cloud configuration file)
- net_value_cost = net_value_cost + cost_intent //e.g. "Infrastructure High Availability (HA) for VNF" may have additional cost
- Capacity Check
- Private Clouds (OpenStack based)
- Perform capacity check per specified Tenant (OpenStack Project)
- If Capacity check fails, drop the cloud region out of the candidate list
- Public Clouds or Other Clouds
- Capacity check always succeeds //assumption: public cloud has infinite capacity
- Private Clouds (OpenStack based)
5. MC → OOF – Return a net value cost for each <cloud owner, cloud region> if the capacity check succeeds
6a) OOF Processing - cloud_net_value input in Multi-objective Optimization (need OOF code changes)
Each service specifies an service-specific objective function that is stored as part of the service-specific policy and is used by OOF to evaluate the candidate <cloud owner, cloud region>. For simplicity of the example, let’s consider service that consists only of one VNF instance. The objective function has two components:
- distance from customer location to the VNF - the service designed assigns a weight for the distance: wd
- the cost of deploying the VNF in a location - the service designer assigns a weight for the cost: wc
OOF optimization function: min (wd*distance + wc*cloud_net_value)
If the service does not care about the cost at all, it would set wc = 0. If the service designer wants to minimize cost, he could set wd=0. Note that candidates that are too far can be eliminated by a distance constraint even before the optimization. For example, if the service has a distance constraint of at most 100 kilometers, then only those <cloud owner, cloud region> within 100 kilometers to the customer location would be considered in the objective function evaluation.
If the service designer wants to trade off between distance and cost, for example, they might set wd = 1, wc = 2. This would mean that one $1 increase in price is as valuable as 2 kilometers in distance.
<cloud owner, cloud region> Candidate 1: $100, 100 kilometers => value: 300
<cloud owner, cloud region> Candidate 2: $150, 80 kilometers => value: 380
<cloud owner, cloud region> Candidate 3: $50, 190 kilometers => value: 290 <- pick this one
6. OOF → SO - Return the target <cloud owner, cloud region> for the Service Instance
7. SO → MC - Deploy VNF template in the target <cloud owner, cloud region> for the Service Instance
7a) MC Processing (need MC code changes)
- Parse Template (e.g. OpenStack Heat Template)
- For each VNFC, instance type in the template
- Fetch Cloud-Agnostic Workload Deployment Policy (Intent) based on <Service (e.g. vCPE), VNFC (e.g. vGW)>
- Value/Content: <Policy JSON>
- Parse Policy JSON
- Modify template according to Intent - intent examples below
- "Infrastructure High Availability (HA) for VNF"
- "Infrastructure Resource Isolation for VNF"
- "Burstable QoS"
- Fetch Cloud-Agnostic Workload Deployment Policy (Intent) based on <Service (e.g. vCPE), VNFC (e.g. vGW)>
- For each VNFC, instance type in the template
Policy (Intent) Realization
- "Infrastructure High Availability (HA) for VNF"
- OpenStack-based Cloud realization
- For R3, Host-based anti-affinity using server groups //Beyond R3, Support other anti-affinity models at availability zone level etc.
- Notes on implementation:
- Instance "count" in heat template specifies VNFC scale out factor
- While dynamic injection of server group into heat template is ideal, a simple starting point could be just switching to an alternate heat which is identical to the deployment template and additionally has server group
- Azure realization
- Availability Set?
- OpenStack-based Cloud realization
"Infrastructure Resource Isolation for VNF" – { "qosProperty": { {"Burstable QoS": "TRUE", "Burstable QoS Oversubscription Percentage": "25"} } }
OpenStack-based VMware VIO Cloud realization
- This can be achieved through min guarantee -- Max or limit (upper bound) & Min or Reservation (guarantee) are part of OpenStack flavor metadata
- Example
- VNFC with "Guaranteed QoS"
- "flavor-xyz-no-oversubscription"
- vCPU (Min/Max) - 16, Mem (Min/Max) - 32GB
- Same VNFC with "Burstable QoS", 25% over-subscription
- "flavor-xyz-25-percent-oversubscription"
- vCPU (Min) - 16, Mem (Min) - 32GB
- vCPU (Max) - 20, Mem (Max) - 40GB
- VNFC with "Guaranteed QoS"
- Only certain pre-defined over-subscription values are allowed to simplify implementation
- Notes on implementation:
- While dynamic injection of limit/reservation into flavor is ideal, a simple starting would be to be to switch to a pre-defined flavor in the environment file
- For aforementioned example
- Original flavor - "flavor-xyz-no-oversubscription"
- Modified flavor based on Policy - "flavor-xyz-25-percent-oversubscription"
- For aforementioned example
- While dynamic injection of limit/reservation into flavor is ideal, a simple starting would be to be to switch to a pre-defined flavor in the environment file
- Example
- "Infrastructure High Availability (HA) for VNF"
7b) Policy (Intent) Database
- For R3, store Cloud-Agnostic Workload Deployment Policy (Intent) can be stored in the form of configuration file(s) in the OOM K8S Persistent Volumes to simplify implementation.
Code Block | ||||||||||
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//Policy Example 1 - VNFC VGW which is part of vCPE service
{
"Service": "vCPE"
"VNFC": "vgw", //"vgw" is also intechangeably used as "vg"
{
"cloudOwner": "VMware VIO", //can be a specific cloud owner such as Azure, VMware VIO, Wind River Titanium Cloud etc.
"intent":
{
"name": "Infrastructure Resource Isolation for VNF",
// realization possible without dedicating CPU and Memory, refer to section on "Cloud Resource Partitioning for Differentiated QoS"
// on how this can help in offering tiered services
"qosProperty":
{
{"Burstable QoS": "TRUE", "Burstable QoS Oversubscription Percentage": "25"}
}
}
}
}
//Policy Example 2 - VNFC vDNS which is part of vLoadBalancer/vDNS service
{
"Service": "vDNS",
"VNFC": "vDNS",
//By default, Policy (Intent) is applicable to all cloud owners/regions unless specified.
{
"intent":
{
"name": "Infrastructure High Availability (HA) for VNF",
}
},
{
"intent":
{
"name": "Infrastructure Resource Isolation for VNF",
// realization possible without dedicating CPU and Memory, refer to section on "Cloud Resource Partitioning for Differentiated QoS"
// on how this can help in offering tiered services
"qosProperty":
{
{"Guaranteed QoS": "TRUE"}
}
}
}
} |
Cloud Resource Partitioning for Differentiated QoS (Combined with Previous)
Value:
- Applicable to all use cases
- Casablanca Targets:
- vCPE (Enable Tiered service offering); 5G Network Slicing (Stretch Goal)
References:
Edge Automation Requirement:
Support three types of slices in the Cloud Infrastructure (Definition Reference: https://kubernetes.io/docs/tasks/configure-pod-container/quality-service-pod/)
- Guaranteed Resource Slice (hard isolation) for various infra Resources (CPU/Memory/Network)
- Max (limit), Min (request) are the same; resource guarantee is "Max"
- Maps to 5G Applications such as Connected Car which fall in the category of ultra-reliable machine-type communications (ref. 1)
- Burstable Resource Slice (soft isolation) for various infra Resources
- Min (request) <= Max (limit); resource guarantee is "Min"
- Maps to Burstable Network Slice such > 1Gbps broadband which fall in the category of extreme mobile broadband (ref. 1)
- Best Effort Resource Slice (no isolation) for various infra Resources
- No Min (request) ; resource guarantee is "None"
- Maps to 5G Applications such as IoT which fall in the category of massive machine-type communications (ref. 1)
Implementation:
- Leverage current HPA framework with appropriate extensions
References:
- https://metis-ii.5g-ppp.eu/wp-content/uploads/white_papers/5G-RAN-Architecture-and-Functional-Design.pdf
Driving Superior Isolation for Tiered Services using Resource Reservation -- Optimization Policies for Residential vCPE
-https://jira.onap.org/browse/OPTFRA-240
Note:
- Any VMs/Containers which are part of a resource slice will adhere to the specs of the resource slice
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Configuration Policies for Guaranteed, Burstable & Best Effort Cloud Infrastructure Resource Slices (this will apply to VMs/Containers also)
Placement Policies for Resource Slices
- Higher (programmable) weight to Cloud Region which supports all three types of resource slices vs only two types of resource slices (Guaranteed/Best Effort)
...
Resource Slice Capability per Cloud Region
- Guaranteed/Burstable/Best Effort
Resource Slice Type
- Guaranteed/Burstable/Best Effort
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Execute Resource Slice Placement Policies for Optimized Service/VNF Placement across Cloud Regions
#
#Spec Reference: https://wiki.onap.org/display/DW/Edge+Scoping+MVP+for+Casablanca+-+ONAP+Enhancements#EdgeScopingMVPforCasablanca-ONAPEnhancements-Cloud-agnosticPlacement/Networking&HomingPolicies(Phase1-CasablancaMVP,Phase2-StretchGoal)
#
from jsonschema import validate
oof_cloud_selection_policy_schema = {
"service": {"type": "string"},
"policyName": {"type": "string"},
"policyDescription": {"type": "string"},
"templateVersion": {"type": "string"},
"version": {"type": "string"},
"priority": {"type": "string"},
"riskType": {"type": "string"},
"riskLevel": {"type": "string"},
"guard": {"type": "string"},
"content": {
"type": "object",
"required": ["cloud-deployment-intent"],
"properties" : {
# VNFC is not used in the OOF->MC path for R3
# This is kept to be consistent with the SO-> MC path
# As an example, vDNS VNF in ONAP has 3 VNFCs - DNS, Packet Gen & Load Balancer --
# Each of the VNFCs could have different policies
"vnfc": {"type": "string"},
# cloud-specific realization of the specified deployment intent
# happens in multi-cloud in the cloud-specific plugin
"cloud-deployment-intent": {
"type": "object",
"properties" : {
# Cloud Type -- Azure, K8S, OpenStack, VMware VIO, Wind River Titanium
# Optionally Accomodate policies per Cloud Type
"Cloud Type (Cloud Provider)": {"type", "array"},
"Infrastructure High Availability for VNF": {"type", "boolean"},
"Infrastructure Resource Isolation for VNF": {"type", "string"},
# Infrastructure Resource Isolation for VNF
# Only certain pre-defined over-subscription values are allowed to
# reflect practical deployment and simplify implementation for R3
"Infrastructure Resource Isolation for VNF - Burstable QoS Oversubscription Percentage": {"type": "int"},
},
},
},
},
"resources": {"type", "array"}, #"vgw" is also interchangeably used as "vg"
"applicableResources": {"type", "string"},
"identity": {"type", "string"},
"policyScope": {"type", "array"},
"policyType": {"type", "string"}
}
#
#Example 1: vCPE, Burstable QoS
#vCPE: Infrastructure Resource Isolation for VNF with Burstable QoS
#
oof_cloud_selection_policy_instance1 = {
"service": "cloudSelectionPolicy",
"policyName": "oofMulti-cloudCasablanca.cloudSelectionPolicy_vCPE_VNF",
"policyDescription": "Cloud Selection Policy for vCPE VNFs",
"templateVersion": "0.0.1",
"version": "oofMulti-cloudCasablanca",
"priority": "3",
"riskType": "test",
"riskLevel": "2",
"guard": "False",
"content": {
"vnfc": "vgw",
"cloud-deployment-intent": {
"Cloud Type (Cloud Provider)": {"VMware VIO"},
"Infrastructure Resource Isolation for VNF": "Burstable QoS",
"Infrastructure Resource Isolation for VNF - Burstable QoS Oversubscription Percentage": 25,
},
},
"resources": ["vgw"], #"vgw" is also interchangeably used as "vg"
"applicableResources": "any",
"identity": "cloud-atrributes",
"policyScope": ["vCPE", "US", "INTERNATIONAL", "ip", "vgw", "vgmux"],
"policyType": "AllPolicy"
}
#
#Example 2:
#vCPE: Infrastructure Resource Isolation for VNF with Guaranteed QoS
#
oof_cloud_selection_policy_instance2 = {
"service": "cloudSelectionPolicy",
"policyName": "oofMulti-cloudCasablanca.cloudSelectionPolicy_vCPE_VNF",
"policyDescription": "Cloud Selection Policy for vCPE VNFs",
"templateVersion": "0.0.1",
"version": "oofMulti-cloudCasablanca",
"priority": "3",
"riskType": "test",
"riskLevel": "2",
"guard": "False",
"content": {
"vnfc": "vgw",
"cloud-deployment-intent": {
"Infrastructure Resource Isolation for VNF": "Guaranteed QoS",
},
},
"resources": ["vgw"], #"vgw" is also interchangeably used as "vg"
"applicableResources": "any",
"identity": "cloud-atrributes",
"policyScope": ["vCPE", "US", "INTERNATIONAL", "ip", "vgw", "vgmux"],
"policyType": "AllPolicy"
}
#
#Example 3:
#vDNS: Infrastructure HA for VNF & Infrastructure Resource Isolation for VNF with Burstable QoS
#
oof_cloud_selection_policy_instance3 = {
"service": "cloudSelectionPolicy",
"policyName": "oofMulti-cloudCasablanca.cloudSelectionPolicy_vDNS_VNF",
"policyDescription": "Cloud Selection Policy for vDNS VNFs",
"templateVersion": "0.0.1",
"version": "oofMulti-cloudCasablanca",
"priority": "3",
"riskType": "test",
"riskLevel": "2",
"guard": "False",
"content": {
"vnfc": "vdns",
"cloud-deployment-intent": {
"Cloud Type (Cloud Provider)": {"VMware VIO", "Azure"},
"Infrastructure High Availability for VNF": True,
"Infrastructure Resource Isolation for VNF": "Burstable QoS",
"Infrastructure Resource Isolation for VNF - Burstable QoS Oversubscription Percentage": 25,
},
},
"resources": ["vDNS"],
"applicableResources": "any",
"identity": "cloud-atrributes",
"policyScope": ["vDNS", "US", "INTERNATIONAL", "vDNS"],
"policyType": "AllPolicy"
}
#
# Example 4:
# vDNS: Infrastructure HA for VNF & Infrastructure Resource Isolation for VNF
# with Guaranteed QoS
#
oof_cloud_selection_policy_instance4 = {
"service": "cloudSelectionPolicy",
"policyName": "oofMulti-cloudCasablanca.cloudSelectionPolicy_vDNS_VNF",
"policyDescription": "Cloud Selection Policy for vDNS VNFs",
"templateVersion": "0.0.1",
"version": "oofMulti-cloudCasablanca",
"priority": "3",
"riskType": "test",
"riskLevel": "2",
"guard": "False",
"content": {
"vnfc": "vdns",
"cloud-deployment-intent": {
"Infrastructure High Availability for VNF": True,
"Infrastructure Resource Isolation for VNF": "Guaranteed QoS",
},
},
"resources": ["vDNS"],
"applicableResources": "any",
"identity": "cloud-atrributes",
"policyScope": ["vDNS", "US", "INTERNATIONAL", "vDNS"],
"policyType": "AllPolicy"
}
validate(oof_cloud_selection_policy_instance1, oof_cloud_selection_policy_schema)
validate(oof_cloud_selection_policy_instance2, oof_cloud_selection_policy_schema)
validate(oof_cloud_selection_policy_instance3, oof_cloud_selection_policy_schema)
validate(oof_cloud_selection_policy_instance4, oof_cloud_selection_policy_schema)
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Step 3. OOF → A&AI - Fetch Cloud-Agnostic (Standardized) Capabilities for the Service Instance (no code changes for R3)
3a) OOF Processing - Perform Cloud Agnostic Capability check for each <cloud owner, cloud region>. OOF will prune any <cloud owner, cloud region> which is not satisfying the standardized capabilities.
Step 4. OOF → SO - Return the target <cloud owner, cloud region> for the Service Instance + deployment-intent per vnfc (code changes in OOF for R3)
OOF ↔ SO API extension - aligned to the OOF/SO API defined by SO Casablanca HPA Design to minimize the terminology set. The data between OOF to SO and SO to MC is identical -- details of the API are in section 5.
Step 5. SO → MC - Deploy VNF template in the target <cloud owner, cloud region> for the Service Instance (code changes in Multi-Cloud for R3)
5) MC Processing (need MC code changes)
- Parse Template (e.g. OpenStack Heat Template)
- For each VNFC, instance type in the template
- Parse Policy JSON coming in the SO ↔ MC directives API
- Modify template (if needed) according to Intent
- Intent examples of interest for R3
- "Infrastructure High Availability (HA) for VNF"
- "Infrastructure Resource Isolation for VNF"
- "Burstable QoS"
- "Infrastructure Resource Isolation for VNF"
- "Guaranteed QoS"
- Intent examples of interest for R3
- For each VNFC, instance type in the template
Policy (Intent) Realization
- Determining the flavor (OpenStack-based VIMs) # same logic applies for instance type in Azure
- Each VNFC uniquely maps to a Flavor - for e.g. VNFC "vgw" maps to "vgw-base", "vDNS" maps to "vDNS-base"
- Beyond Casablanca
- VNFC intent to realization mapping happens through A&AI.
- "Infrastructure High Availability (HA) for VNF"
- OpenStack-based Cloud realization
- For R3, Host-based anti-affinity using server groups //Beyond R3, Support other anti-affinity models at availability zone level etc.
- Implementation Notes:
- Instance "count" in heat template specifies VNFC scale out factor
- While dynamic injection of server group into heat template is ideal, a simple starting point could be just switching to an alternate heat template which is identical to the deployment template and additionally has server group
- Azure realization
- Availability Set?
- OpenStack-based Cloud realization
"Infrastructure Resource Isolation for VNF" – { "qosProperty": { {"Burstable QoS": "TRUE", "Burstable QoS Oversubscription Percentage": "25"} } }
OpenStack-based VMware VIO Cloud realization
- This can be achieved through min guarantee -- Max or limit (upper bound) & Min or Reservation (guarantee) are part of OpenStack flavor metadata
- Example
- VNFC "vgw" with "Guaranteed QoS"
- vCPU (Min/Max) - 16, Mem (Min/Max) - 32GB
- Maps to "vgw-Guaranteed-QoS" flavor for OpenStack-based VIMs
- Same VNFC with "Burstable QoS", 25% over-subscription
- vCPU (Min) - 16, Mem (Min) - 32GB
- vCPU (Max) - 20, Mem (Max) - 40GB
- Maps to "vgw-Burstable-QoS-25-percent-oversubscription" flavor for OpenStack-based VIMs
- VNFC "vDNS" with "Guaranteed QoS" & "Infrastructure High Availability"
- Maps to "vDNS-Guaranteed-QoS" flavor and "vDNS-infrastructure-high-availability" heat template
- VNFC "vgw" with "Guaranteed QoS"
- Only certain pre-defined over-subscription values are allowed to simplify implementation
- Implementation Notes:
- While dynamic injection of limit/reservation into flavor is ideal, a simple starting would be to be to switch to a pre-defined flavor in the environment file
- For aforementioned example
- Original flavor - "flavor-xyz-no-oversubscription"
- Modified flavor based on Policy - "flavor-xyz-25-percent-oversubscription"
- For aforementioned example
- While dynamic injection of limit/reservation into flavor is ideal, a simple starting would be to be to switch to a pre-defined flavor in the environment file
- Example
- Implementation Notes:
- From an implementation stand point, MC would be exposing a Workload Deployment Policy (Intent) API
- Input : deployment-intent, cloud owner, cloud region, deployment template, deployment environment file, ...
- Output : Success or Failure with reason, modified deployment template, modified deployment environment file, ...
- From an implementation stand point, MC would be exposing a Workload Deployment Policy (Intent) API
- Determining the flavor (OpenStack-based VIMs) # same logic applies for instance type in Azure
SO ↔ MC API extension - aligned to the SO/MC API defined by SO Casablanca HPA Design to minimize the terminology set
(This data is sent from OOF to SO. SO transparently echoes this data to MC)
Code Block | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|
| ||||||||||
#
#The same information is opaquely passed from OOF to SO
#
#
#Example 1: vCPE, Burstable QoS
#vCPE: Infrastructure Resource Isolation for VNF with Burstable QoS
#
"oof_directives":{
"directives":[
{
"vnfc_directives":[
{
"vnfc_id":"vgw",
"directives":[
{
"directive_name":"Resource-Isolation-Intent-directive",
"attributes":[
{
"attribute_name": "Infrastructure Resource Isolation for VNF",
"attribute_value": "Burstable QoS",
},
{
"attribute_name": "Infrastructure Resource Isolation for VNF - Burstable QoS Oversubscription Percentage",
"attribute_value": "25",
},
]
},
]
},
]
},
]
}
#
#Example 2:
#vCPE: Infrastructure Resource Isolation for VNF with Guaranteed QoS
#
"oof_directives":{
"directives":[
{
"vnfc_directives":[
{
"vnfc_id":"vgw",
"directives":[
{
"directive_name":"Resource-Isolation-Intent-directive",
"attributes":[
{
"attribute_name": "Infrastructure Resource Isolation for VNF",
"attribute_value": "Guaranteed QoS",
},
]
},
]
},
]
},
]
}
#
#Example 3:
#vDNS: Infrastructure HA for VNF & Infrastructure Resource Isolation for VNF with Burstable QoS
#
"oof_directives":{
"directives":[
{
"vnfc_directives":[
{
"vnfc_id":"vdns",
"directives":[
{
"directive_name":"Resource-Isolation-Intent-directive",
"attributes":[
{
"attribute_name": "Infrastructure Resource Isolation for VNF",
"attribute_value": "Burstable QoS",
},
{
"attribute_name": "Infrastructure Resource Isolation for VNF - Burstable QoS Oversubscription Percentage",
"attribute_value": "25",
},
]
},
{
"directive_name":"Infrastructure-HA-Intent-directive",
"attributes":[
{
"attribute_name": "Infrastructure High Availability for VNF",
},
]
},
]
},
]
},
]
}
#
# Example 4:
# vDNS: Infrastructure HA for VNF & Infrastructure Resource Isolation for VNF
# with Guaranteed QoS
#
"oof_directives":{
"directives":[
{
"vnfc_directives":[
{
"vnfc_id":"vdns",
"directives":[
{
"directive_name":"Resource-Isolation-Intent-directive",
"attributes":[
{
"attribute_name": "Infrastructure Resource Isolation for VNF",
"attribute_value": "Guaranteed QoS",
},
]
},
{
"directive_name":"Infrastructure-HA-Intent-directive",
"attributes":[
{
"attribute_name": "Infrastructure High Availability for VNF",
},
]
},
]
},
]
},
]
}
|
Follow ups:
- Use Cases for Integration testing
- vCPE
- In the current state, this use case cannot support the intent "Infra HA for VMs in a VNF"
- This use case has been tested in R2 with OOF↔MC capacity check API
- vDNS
- Can support intent "Infra HA for VMs in a VNF" and "Infrastructure Resource Isolation for VNF"
- Nothing additional needed in OOF or MC
- Changes needed in SO to call OOF API
- Marcus from Intel is driving this
- vCPE
- Policy DB – is there any restriction on the type of json objects that can be stored?
- Matti to follow up with Ankit
Implementation trade offs for Casablanca (R3) and potential Dublin (R4) plan:
- Deployment-Intent
- 1. "Infrastructure Resource Isolation for VNF" – { "qosProperty": { {"Burstable QoS": "TRUE", "Burstable QoS Oversubscription Percentage": "25"} } }
- Casablanca Plan
- Only certain pre-defined over-subscription values are allowed to reflect practical deployment and simplify implementation
- Dublin & Beyond Potential Plan
- Creating instance types on demand for private clouds - to study
- Casablanca Plan
- 2. Cloud-agnostic Workload Deployment Policy (Intent)
- Casablanca Plan
- Cloud-Agnostic Workload Deployment Policy (Intent) can be directly mapped to specific realization (e.g. OpenStack Flavor, Azure Instance Type) to simplify implementation.
- Dublin & Beyond Potential Plan
- VIM Capability Discovery to populate Intent in A&AI aligning taking into account Cloud selection policy based on cost specific to Intent (leverage similarities to HPA label discovery supported since R2)
- VIM selection – Intent to be populated in A&AI for capability matching
- VIM Deployment realization - Intent(s) to specific realization mapping (e.g. OpenStack Flavor, Azure Instance Type) to be populated in A&AI
- VIM Capability Discovery to populate Intent in A&AI aligning taking into account Cloud selection policy based on cost specific to Intent (leverage similarities to HPA label discovery supported since R2)
- Casablanca Plan
- 1. "Infrastructure Resource Isolation for VNF" – { "qosProperty": { {"Burstable QoS": "TRUE", "Burstable QoS Oversubscription Percentage": "25"} } }
Cloud Resource Partitioning for Differentiated QoS (Combined with Previous)
Value:
- Applicable to all use cases
- Casablanca Targets:
- vCPE (Enable Tiered service offering); 5G Network Slicing (Stretch Goal)
References:
Edge Automation Requirement:
Support three types of slices in the Cloud Infrastructure (Definition Reference: https://kubernetes.io/docs/tasks/configure-pod-container/quality-service-pod/)
- Guaranteed Resource Slice (hard isolation) for various infra Resources (CPU/Memory/Network)
- Max (limit), Min (request) are the same; resource guarantee is "Max"
- Maps to 5G Applications such as Connected Car which fall in the category of ultra-reliable machine-type communications (ref. 1)
- Burstable Resource Slice (soft isolation) for various infra Resources
- Min (request) <= Max (limit); resource guarantee is "Min"
- Maps to Burstable Network Slice such > 1Gbps broadband which fall in the category of extreme mobile broadband (ref. 1)
- Best Effort Resource Slice (no isolation) for various infra Resources
- No Min (request) ; resource guarantee is "None"
- Maps to 5G Applications such as IoT which fall in the category of massive machine-type communications (ref. 1)
Implementation:
- Leverage current HPA framework with appropriate extensions
References:
- https://metis-ii.5g-ppp.eu/wp-content/uploads/white_papers/5G-RAN-Architecture-and-Functional-Design.pdf
Driving Superior Isolation for Tiered Services using Resource Reservation -- Optimization Policies for Residential vCPE
-https://jira.onap.org/browse/OPTFRA-240
Note:
- Any VMs/Containers which are part of a resource slice will adhere to the specs of the resource slice
ONAP Component | Life Cycle Phase | Enhancements |
---|---|---|
Policy | Design | Configuration Policies for Guaranteed, Burstable & Best Effort Cloud Infrastructure Resource Slices (this will apply to VMs/Containers also) Placement Policies for Resource Slices
|
Multi-Cloud | Deploy | Resource Slice Capability Discovery |
A&AI | Deploy | Resource Slice Capability per Cloud Region
Resource Slice Type
|
OOF | Deploy | Execute Resource Slice Placement Policies for Optimized Service/VNF Placement across Cloud Regions |
Aggregated Infrastructure Telemetry Streams (Aligns with HPA requirements, Combining efforts with HPA)
Value
Edge Infrastructure Analytics complementing VNF Analytics
- Increase the accuracy of placement decisions
- Addresses gap in cloud provider solution – e.g. open source OpenStack does not have a comprehensive telemetry solution
Casablanca MVP
- HPA metrics visualization
- End-to-end use cases: vCPE, vDNS
Casablanca Stretch Goal
- OOF to use aggregated telemetry information for fine-grained optimization
Jira server ONAP JIRA serverId 425b2b0a-557c-3c0c-b515-579789cceedb key MULTICLOUD-254
ONAP, as in R2, collects the statistics/alarms/events from workloads (VMs) and take any close loop control actions such as Heal a process, scale-out, restart etc.. In R3 and beyond, infrastructure related statistics/alarms/events will be collected, generate actionable insights and take life cycle actions on the workloads. Infrastructure statistics normally include performance counters, NIC counters, IPMI information on per physical server node basis. To reduce the load on the ONAP, it is necessary that aggregated (summarized) information is sent to the ONAP from edge-clouds.
As part of this activity, intention is to create aggregation micro-service that collects the data from physical nodes (over collected and other mechanisms), aggregate the information (time based aggregation, threshold based aggregation, silencing etc.,..) based on the configurable rules and export the aggregate data to DCAE. This micro service can be instantiated by ONAP itself - one or more instances for edge-clouds at the ONAP-central itself using OOM, it could be instantiated at the edge-cloud using their own deployment tools or it could be deployed edge service providers at the regional site level.
In R3, functionality is limited to HPA features and visualization. R3 stretch goal: It collects information from each compute node for all HPA features and keeps track of health and resource information. It would use this information in placement decisions by OOF for accurate results.
Even though the aggregation service is being developed in Multi-Cloud project, it is expected that this can be deployed at various places. The decision to deploy at various levels can be due to performance and regulatory reasons. Following deployments are envisaged at this time:
- At the edge site level.
- At the regional site level (on behalf of set of edge sites).
- At the ONAP level (on behalf of set of edge sites)
Impacted projects (development activities)
ONAP Component | Enhancements |
---|---|
Overall |
|
Multi-Cloud |
|
AAI & ESR |
|
PORTAL | ESR portal related changes to take information about the edge-cloud (CA Cert and UN/PWD information) - Future when the edges started to send aggregate data) |
OOF | HPA Enhancements
|
Aggregated Infrastructure Telemetry Streams (Aligns with HPA requirements, Combining efforts with HPA)
Value
Edge Infrastructure Analytics complementing 5G VNF Analytics
Jira | ||||||
---|---|---|---|---|---|---|
|
ONAP, as in R2, collects the statistics/alarms/events from workloads (VMs) and take any close loop control actions such as Heal a process, scale-out, restart etc.. In R3, infrastructure related statistics/alarms/events will be collected, generate actionable insights and take life cycle actions on the workloads. Infrastructure statistics normally include performance counters, NIC counters, IPMI information on per physical server node basis. To reduce the load on the ONAP, it is necessary that aggregated (summarized) information is sent to the ONAP from edge-clouds.
As part of this activity, intention is to create aggregation micro-service that collects the data from physical nodes (over collected and other mechanisms), aggregate the information (time based aggregation, threshold based aggregation, silencing etc.,..) based on the configurable rules and export the aggregate data to DCAE. This micro service can be instantiated by ONAP itself - one or more instances for edge-clouds at the ONAP-central itself using OOM, it could be instantiated at the edge-cloud using their own deployment tools or it could be deployed edge service providers at the regional site level.
Impacted projects (development activities)
ONAP Component | Enhancements |
---|---|
Overall |
|
Multi-Cloud |
|
AAI & ESR |
|
PORTAL | ESR portal related changes to take information about the edge-cloud (CA Cert and UN/PWD information) |
DCAE & DMAPP | None expected?? |
Life Cycle stages related functions
ONAP Component | Life cycle phase | Activities |
---|---|---|
AAI and ESR | Deploy & Run time |
|
AAI and ESR | Run time |
|
Multi-Cloud | Run time |
|
OOF | Run time |
|
High level architecture slides:
View file | ||||
---|---|---|---|---|
|
ONAP Edge Analytics with DCAE/DMaaP independent of closed loop (Stretch Goal - Beyond Casablanca)
Value
- 5G Analytics
ONAP Component | Life cycle phase | Enhancements |
---|---|---|
OOM - ONAP Central | Deploy |
|
Multi-Cloud Deployment in Edge Cloud (Stretch Goal - Beyond Casablanca)
Jira server ONAP JIRA serverId 425b2b0a-557c-3c0c-b515-579789cceedb key MULTICLOUD-262
...