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| Code Block | ||||
|---|---|---|---|---|
| ||||
@startuml title This is the flow that will be tested in Beijing participant VNF participant VES_Collector participant TCA_Instance1 participant Policy participant AppC autonumber VNF -> VES_Collector : VES Message\nmeasurementsForVfScaling VES_Collector -> TCA_Instance1 : VES Message\nmeasurementsForVfScaling TCA_Instance1 -> Policy : Signature ONSET Message Policy -> AppC : Action AppC -> VNF : Action note left VNF action taken which corrects the condition end note VNF -> VES_Collector : VES Message\nmeasurementsForVfScaling note left Time passes until next message end note VES_Collector -> TCA_Instance1 : VES Message\nmeasurementsForVfScaling TCA_Instance1 -> Policy : Signature ABATE Message @enduml |
Flow
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4:
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Update
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Control Loop by Reconfiguring TCA
Reconfigure
| Code Block | ||||
|---|---|---|---|---|
| ||||
@startuml
title This is the policy-update flow that will be tested in Beijing
actor CLAMP_Tester
participant CLAMP
participant Policy
box "DCAE controller"
participant "Policy-handler" as PH
participant "Deployment-handler" as DH
control Cloudify
database "Consul-kv" as consul
participant "Config-binding service" as CBS
end box
participant TCA_Instance
autonumber
CLAMP_Tester -> CLAMP : Update control loop settings
CLAMP -> Policy: update policy
group policy update
Policy -> PH : updated policy\n with policyName = policy_id
activate PH
PH -> Policy : /getConfig latest\n policy for\n policyName = policy_id
Policy --> PH : return found policy
PH -> DH : policy updated
deactivate PH
activate DH
DH -> Cloudify : get components
Cloudify --> DH : components and\n run-time properties
DH -> DH : find TCA_Instance\n by policy_id
DH -> Cloudify : policy updated\n on TCA_Instance
deactivate DH
activate Cloudify
Cloudify -> consul: store updated policies\n for TCA_Instance
Cloudify -> TCA_Instance: notify about updated policies through script
deactivate Cloudify
activate TCA_Instance
hnote over TCA_Instance: policy changed
TCA_Instance -> TCA_Instance: act on\n changed policy
TCA_Instance -->]: continue
deactivate TCA_Instance
end
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==alternative to acting on the push-notification through script from DCAE-Controller==
|||
group polling for policy changes
TCA_Instance -> CBS: get Config\n and policies
activate TCA_Instance
CBS -> consul: get Config\n and policies
consul --> CBS: Config\n and policies
CBS --> TCA_Instance: Config and policies
hnote over TCA_Instance: policy might have changed
TCA_Instance -->]: continue
deactivate TCA_Instance
end
@enduml |
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After the control loop is reconfigured, we test that the changes have taken effect. This is done by running the control loop again. For example, if the threshold value was increased, we would initiate an event with the old threshold value, and see that the signature is no longer produced.
Flow
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5: Stop and Restart Control Loop
| Code Block | ||||
|---|---|---|---|---|
| ||||
@startuml participant CLAMP actor CLAMP_Tester participant Policy autonumber CLAMP_Tester -> CLAMP : Stop operation\nof control loop CLAMP -> Policy : Disable Operational Policy participant VNF participant VES_Collector participant TCA_Instance1 participant AppC autonumber group Runtime Test VNF -> VES_Collector : VES Message\nmeasurementsForVfScaling VES_Collector -> TCA_Instance1 : VES Message\nmeasurementsForVfScaling TCA_Instance1 -> Policy : Signature ONSET Message end CLAMP_Tester -> CLAMP : Restart operation\nof control loop CLAMP -> Policy : Enable Operational Policy participant VNF participant VES_Collector participant TCA_Instance1 participant AppC autonumber group Runtime Test VNF -> VES_Collector : VES Message\nmeasurementsForVfScaling VES_Collector -> TCA_Instance1 : VES Message\nmeasurementsForVfScaling TCA_Instance1 -> Policy : Signature ONSET Message Policy -> AppC : Action AppC -> VNF : Action VNF -> VES_Collector : VES Message\nmeasurementsForVfScaling VES_Collector -> TCA_Instance1 : VES Message\nmeasurementsForVfScaling TCA_Instance1 -> Policy : Signature ABATE Message end @enduml |
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