DaprTrafficControl

This project is based on [https://github.com/EdwinVW/dapr-traffic-control]

and

[https://learn.microsoft.com/en-us/dotnet/architecture/dapr-for-net-developers/]

Overall architecture

graph LR
    subgraph subTcs[Traffic Control Service]
       ds1[Dapr Sidecar] -. input binding /entrycam .-> tcs[TrafficControlService]
       ds1 -. input binding /exitcam .-> tcs
       tcs -. pub/sub,state management .-> ds1
    end
     subgraph subFcs[Fine Collection Service]
       ds2[Dapr Sidecar] -. input binding /entrycam .-> fcs[FineCollectionService]
       ds2 -. pub/sub /collectfine .-> fcs
       fcs -. service invokation,output binding,secrets management .-> ds2
    end
    subgraph subVhs[Vehicle Registration Service]
       ds3[Dapr Sidecar] -. input binding /entrycam .-> vhs[VehicleRegistrationService]
       ds3 -. service invokation /vehicleinfo/license-number .-> vhs
    end
    subgraph subHlp[Infrastrcture]
        MQTT[MQTT]
        REDIS[Redis]
        MQ[RAbbitMQ]
        SMTP[SMTP]
     end
    CS[CameraSimulation] -. input binding .-> MQTT
    MQTT -. input binding .-> ds1
    ds1 -. state management .-> REDIS
    ds1 -. pub/sub .-> MQ
    MQ -. pub/sub .-> ds2
    ds2 -. output binding .-> SMTP
    ds2 -. service invokation .-> ds3
    
   linkStyle default stroke-width:2px 
   style CS fill:blue,stroke:#333,stroke-width:2px;
   style tcs fill:blue,stroke:#333,stroke-width:2px;
   style fcs fill:blue,stroke:#333,stroke-width:2px;
   style vhs fill:blue,stroke:#333,stroke-width:2px;
   style ds1 fill:darkBlue,stroke:#333,stroke-width:2px;
   style ds2 fill:darkBlue,stroke:#333,stroke-width:2px;
   style ds3 fill:darkBlue,stroke:#333,stroke-width:2px;
   style subTcs fill:lightGrey,opacity:0.5;
   style subVhs fill:lightGrey,opacity:0.5;
   style MQTT fill:green,stroke:#333,stroke-width:2px;
   style REDIS fill:green,stroke:#333,stroke-width:2px;
   style SMTP fill:green,stroke:#333,stroke-width:2px;
   style MQ fill:green,stroke:#333,stroke-width:2px;
   style subFcs fill:lightGrey,opacity:0.5;
   style subHlp fill:lightGrey,opacity:0.5;

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Sequence

sequenceDiagram 
    autonumber
    participant CS as CameraSimulation
    participant tcsEntry as TrafficControlService (Entry camera)
    participant tcsExit as TrafficControlService (Exit camera)
    participant fcs as FineCollectionService
    participant vhs as VehicleRegistrationService
    participant smtp as SMTP
    CS->>tcsEntry: POST vehicleRegistered
    tcsEntry->>tcsEntry: Store VehicleState
    CS->>tcsExit: POST vehicleRegistered
    tcsExit->>tcsExit: GET VehicleState
    tcsExit->>tcsExit: Calculate average speed
    tcsExit->>fcs: POST speedingViolation (avg speed over limit)
    fcs->>fcs: Calculate fine
    fcs->>vhs: GET vehicleInfo/licenseNumber
    vhs-->>fcs: 
    fcs->>smtp: Send fine

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This project is using tye to run locally and deploy to Azure.

Prerequisites

To run locally dapr is required.

install dapr locally

1. Install dapr CLI
2. Initialize

Run locally

From the root folder run

tye run --dashboard

Last argument will open the tye dashboard.

If there are errors in regards to https when running locally, run the following command:

dotnet dev-certs https --trust

Install AKS and dapr and deploy to AKS using bicep

note: setx BICEP_CLI_EXPERIMENTAL_FEATURES Extensibility to enable bicep deploy

1. login

az login

2. Set environment variables

$rg="rg-dtc"
$loc="northeurope"

3. Create resource group

az group create --name $rg --location $loc

4. Deploy

az deployment group create --resource-group $rg --template-file "./bicep/aks/main.bicep" --parameters "./bicep/aks/main.parameters.json"

5. Cleanup

az group delete -g $rg --yes --no-wait

kubectl apply -f .\Projects\DaprTrafficControl\bicep\aks\modules\kvsync.yaml

Deploy to AKS using github actions

This project is using Github Actions to deploy [https://learn.microsoft.com/en-us/azure/aks/kubernetes-action]

1. Create connection between Github and Azure

az ad sp create-for-rbac \
    --name "ghActiondtc" \
    --scope /subscriptions/subscriptionId/resourceGroups/$rg \
    --role Contributor \
    --sdk-auth

Save the output as follows:

Secret name	Secret value
AZURE_CREDENTIALS	The entire JSON output from the az ad sp create-for-rbac command
service_principal	The value of clientId
service_principal_password	The value of clientSecret
subscription	The value of *<subscriptionId
tenant	The value of tenantId
registry	The name of your registry
repository	Name of your repository
resource_group	The name of your resource group
cluster_name	The name of your cluster

Install grafana (optional)

Navigate to K8s/observability/grafana folder. (TODO: Use managed grafana)

kubectl apply -f grafana_namespace.yaml

# install Prometheus
helm repo add prometheus-community https://prometheus-community.github.io/helm-charts
helm repo update
helm install dapr-prom prometheus-community/prometheus -n dapr-monitoring --set alertmanager.persistentVolume.enable=false --set pushgateway.persistentVolume.enabled=false --set server.persistentVolume.enabled=false

# install Grafana
helm repo add grafana https://grafana.github.io/helm-charts
helm repo update
helm install grafana grafana/grafana -n dapr-monitoring --set persistence.enabled=true

# display Grafana admin password
& ./get-grafana-password.ps1

AKS helpers

aks get oidc issuer url

az aks show -n $aks -g $rg --query "oidcIssuerProfile.issuerUrl" -otsv

aks get kubeconfig

az aks get-credentials -n $aks -g $rg --admin

aks set default namespace for kubectl

kubectl config set-context --current --namespace=<your-namespace>

###You can see that now a new Dapr configuration which enables tracing has been added. Run the command:

dapr configurations --kubernetes

after deploying, update kvsync.yaml with workload identity id, keyvault name and tenant id and apply using kubectl

kubectl apply -f .\bicep\aks\modules\kvsync.yaml  

Use Azure Container apps

[https://docs.microsoft.com/en-us/azure/container-apps/quickstart-dotnet-azure-container-apps]

The bicep strucure

graph LR
    A[main.bicep] 
    X[main.parameters.json] --> A
    A --> B[modules]
    B --> C[container-apps-environment.bicep]
    B --> D[service-bus.bicep]
    B --> E[cosmos-db.bicep]
    B --> F[dapr-components.bicep]
    B --> G[container-registry.bicep]
    B --> H[key-vault.bicep]
    B --> I[container-apps.bicep]
    I --> J[container-apps]
    I --> K[secrets]
    K --> L[app-insights-secrets.bicep]
    J --> M[mail.bicep]
    J --> N[mosquitto.bicep]
    J --> O[trafficsimulation-service.bicep]
    J --> P[visualsim-service.bicep]
    J --> Q[trafficcontrol-service.bicep]
    J --> R[finecollection-service.bicep]
    J --> S[vehicleregistration-service.bicep]
    F --> K
    K --> T[mail-server-secrets.bicep]

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Deploy to Azure Container Apps using bicep

1. login

az login

2. Add containerapp extension

az extension add --name containerapp --upgrade
az provider register --namespace Microsoft.App

3. Set environment variables

$rg="rg-dtc"
$loc="northeurope"

4. Create resource group

az group create --name $rg --location $loc

5. Deploy

az deployment group create --resource-group $rg --template-file "./bicep/aca/main.bicep" --parameters "./bicep/aca/main.parameters.json"

6. Cleanup

az group delete -g $rg --yes --no-wait