InfluxDB-based Data Historian, deployed and managed by Azure IoT Operations.

This project framework provides the following features:

• InfluxDB deployment and configuration.
• Secret generation with Azure Key Vault and access using Azure Key Vault Secrets Store CSI Driver.
• Telegraf for pipelines and transformation into InfluxDB.
• Azure IoT Operations Orchestrator for deploying and configuring the Data Historian in the cluster.
• Azure IoT Operations Data Processor for managing the data that's captured in the Data Historian.

• (Optionally for Windows) WSL installed and setup.
• Azure CLI available on the command line where this will be deployed.
• Terraform available on the command line where this will be deployed.
• Cluster with Azure IoT Operations deployed -> This project assumes azure-edge-extensions-aio-iac-terraform was used, however, any cluster with AIO deployed will work.
• Owner access to a Resource Group with an existing cluster configured and connected to Azure Arc.

1. Login to the AZ CLI:

   az login --tenant <tenant>.onmicrosoft.com

   • Make sure your subscription is the one that you would like to use: az account show.
   • Change to the subscription that you would like to use if needed:

     az account set -s <subscription-id>

2. Add a <unique-name>.auto.tfvars file to the root of the deploy directory that contains the following:

   // <project-root>/deploy/<unique-name>.auto.tfvars
   
   name = "<unique-name>"
   location = "<location>"

3. From the deploy directory execute the following:

   terraform init
   terraform apply

After the Terraform in this project has been applied, you should be able to connect to your cluster using the az connectedk8s proxy command:

az connectedk8s proxy -g rg-<unique-name> -n arc-<unique-name>

If you have a simulator set up from azure-edge-extensions-aio-iac-terraform or from a the Azure IoT Operations install, then there should be data flowing into the topics in Azure IoT Operations MQ broker. You can validate that there is data flowing by kubectl exec into a pod in your cluster that's setup with mqttui. If you deployed the azure-edge-extensions-aio-iac-terraform repo then you should already have this pod. To exec into this pod, run the following command:

kubectl exec -it -n aio deployments/mqtt-client -c mqtt-client -- sh

Once inside the pod you can run the following command to open mqttui and subscribe to all of the topics:

mqttui -b mqtts://aio-mq-dmqtt-frontend:8883 -u '$sat' --password $(cat /var/run/secrets/tokens/mq-sat) --insecure

NOTE: This method was adapted from Azure IoT Operations Documentation - Verify data is flowing and can be referenced if needed.

If there is data flowing within the topics of your broker then InfluxDB should be filling with this data. Connect to your InfluxDB locally by first configuring kubectl port-forward:

kubectl port-forward service/influxdb-influxdb2 8086:80 -n aio

Then open a web browser and navigate to http://localhost:8086. Next, get your admin username and password by either referring to the Azure Key Vault Secret that was added after applying the Terraform, or if you've configured the username and password directly, use that instead.

Navigate to the datahistorian default bucket and run a query to see the measurements that have been added.