Event Grid for event routing in Azure - Mini Project: Build & Apply

Event Grid for event routing

📖 Scenario: You are setting up a simple event routing system in Azure using Event Grid. This system will route events from a storage account to a function app that processes these events.

🎯 Goal: Build an Azure Event Grid subscription that routes events from a storage account to an Azure Function endpoint.

📋 What You'll Learn

Create a resource group variable with the exact name resource_group set to myResourceGroup.

Create a storage account variable with the exact name storage_account set to mystorageacct.

Create an Event Grid subscription variable with the exact name event_subscription set to myeventsubscription.

Create an endpoint variable with the exact name endpoint_url set to https://myfunctionapp.azurewebsites.net/runtime/webhooks/eventgrid?functionName=ProcessEvent.

Create an Event Grid subscription resource that connects the storage account to the endpoint.

💡 Why This Matters

🌍 Real World

Event Grid is used to route events from Azure resources to various endpoints for processing, enabling reactive and serverless architectures.

💼 Career

Understanding Event Grid subscription configuration is essential for cloud engineers and developers working with event-driven Azure solutions.

1

DATA SETUP: Define resource group and storage account variables

Create a variable called resource_group and set it to myResourceGroup. Then create a variable called storage_account and set it to mystorageacct.

Azure

# Your code here

Need a hint?

Use simple string variables to hold the resource group and storage account names.

2

CONFIGURATION: Define event subscription and endpoint URL variables

Create a variable called event_subscription and set it to myeventsubscription. Also create a variable called endpoint_url and set it to https://myfunctionapp.azurewebsites.net/runtime/webhooks/eventgrid?functionName=ProcessEvent.

Azure

resource_group = "myResourceGroup"
storage_account = "mystorageacct"
# Your code here

Need a hint?

Use string variables for the event subscription name and the function app endpoint URL.

3

CORE LOGIC: Create the Event Grid subscription resource configuration

Create a dictionary called event_grid_subscription with keys name, scope, and destination. Set name to event_subscription. Set scope to the storage account resource ID string in the format /subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/{resource_group}/providers/Microsoft.Storage/storageAccounts/{storage_account}. Set destination to a dictionary with key endpointType set to WebHook and key properties set to a dictionary with key endpointUrl set to endpoint_url.

Azure

resource_group = "myResourceGroup"
storage_account = "mystorageacct"
event_subscription = "myeventsubscription"
endpoint_url = "https://myfunctionapp.azurewebsites.net/runtime/webhooks/eventgrid?functionName=ProcessEvent"
# Your code here

Need a hint?

Use an f-string to build the scope string with the resource group and storage account variables.

4

COMPLETION: Add the event subscription filter to only include Microsoft.Storage.BlobCreated events

Add a key filter to the event_grid_subscription dictionary. Set it to a dictionary with key includedEventTypes set to a list containing the string Microsoft.Storage.BlobCreated.

Azure

resource_group = "myResourceGroup"
storage_account = "mystorageacct"
event_subscription = "myeventsubscription"
endpoint_url = "https://myfunctionapp.azurewebsites.net/runtime/webhooks/eventgrid?functionName=ProcessEvent"
event_grid_subscription = {
    "name": event_subscription,
    "scope": f"/subscriptions/00000000-0000-0000-0000-000000000000/resourceGroups/{resource_group}/providers/Microsoft.Storage/storageAccounts/{storage_account}",
    "destination": {
        "endpointType": "WebHook",
        "properties": {
            "endpointUrl": endpoint_url
        }
    }
}
# Your code here

Need a hint?

Add the filter key at the same level as destination inside the event_grid_subscription dictionary.