Create an Event Hubs data connection for Azure Data Explorer by using Python

Azure Data Explorer is a fast and highly scalable data exploration service for log and telemetry data. Azure Data Explorer offers ingestion (data loading) from event hubs, IoT hubs, and blobs written to blob containers.

In this article, you create an Event Hubs data connection for Azure Data Explorer by using Python.

Prerequisites

Install Python package

To install the Python package for Azure Data Explorer (Kusto), open a command prompt that has Python in its path. Run the following command:

pip install azure-common
pip install azure-mgmt-kusto

Authentication

To run the following example, you need an Azure Active Directory (Azure AD) application and service principal that can access resources. To create a free Azure AD application and add role assignment at the subscription level, see Create an Azure AD application. You also need the directory (tenant) ID, application ID, and client secret.

Add an Event Hubs data connection

The following example shows you how to add an Event Hubs data connection programmatically. See connect to the event hub for adding an Event Hubs data connection using the Azure portal.

from azure.mgmt.kusto import KustoManagementClient
from azure.mgmt.kusto.models import EventHubDataConnection
from azure.identity import ClientSecretCredential

#Directory (tenant) ID
tenant_id = "xxxxxxxx-xxxxx-xxxx-xxxx-xxxxxxxxx"
#Application ID
client_id = "xxxxxxxx-xxxxx-xxxx-xxxx-xxxxxxxxx"
#Client Secret
client_secret = "xxxxxxxxxxxxxx"
subscription_id = "xxxxxxxx-xxxxx-xxxx-xxxx-xxxxxxxxx"
credentials = ServicePrincipalCredentials(
        client_id=client_id,
        secret=client_secret,
        tenant=tenant_id
    )
kusto_management_client = KustoManagementClient(credentials, subscription_id)

resource_group_name = "myresourcegroup"
#The cluster and database that are created as part of the Prerequisites
cluster_name = "mycluster"
database_name = "mydatabase"
data_connection_name = "myeventhubconnect"
#The event hub that is created as part of the Prerequisites
event_hub_resource_id = "/subscriptions/xxxxxxxx-xxxxx-xxxx-xxxx-xxxxxxxxx/resourceGroups/myresourcegroup/providers/Microsoft.EventHub/namespaces/myeventhubnamespace/eventhubs/myeventhub"";
consumer_group = "$Default"
location = "China East 2"
#The table and column mapping that are created as part of the Prerequisites
table_name = "mytable"
mapping_rule_name = "mytablemappingrule"
data_format = "csv"
database_routing = "Multi"
#Returns an instance of LROPoller, check https://docs.microsoft.com/python/api/msrest/msrest.polling.lropoller?view=azure-python
poller = kusto_management_client.data_connections.create_or_update(
            resource_group_name=resource_group_name,
            cluster_name=cluster_name,
            database_name=database_name,
            data_connection_name=data_connection_name,
            parameters=EventHubDataConnection(
                event_hub_resource_id=event_hub_resource_id,
                consumer_group=consumer_group,
                location=location,
                table_name=table_name,
                mapping_rule_name=mapping_rule_name,
                data_format=data_format,
                database_routing=database_routing
            )
        )
poller.wait()
print(poller.result())
Setting Suggested value Field description
tenant_id xxxxxxxx-xxxxx-xxxx-xxxx-xxxxxxxxx Your tenant ID. Also known as directory ID.
subscriptionId xxxxxxxx-xxxxx-xxxx-xxxx-xxxxxxxxx The subscription ID that you use for resource creation.
client_id xxxxxxxx-xxxxx-xxxx-xxxx-xxxxxxxxx The client ID of the application that can access resources in your tenant.
client_secret xxxxxxxxxxxxxx The client secret of the application that can access resources in your tenant.
resource_group_name myresourcegroup The name of the resource group containing your cluster.
cluster_name mycluster The name of your cluster.
database_name mydatabase The name of the target database in your cluster.
data_connection_name myeventhubconnect The desired name of your data connection.
table_name mytable The name of the target table in the target database.
mapping_rule_name mytablemappingrule The name of your column mapping related to the target table.
data_format csv The data format of the message.
event_hub_resource_id Resource ID The resource ID of your event hub that holds the data for ingestion.
consumer_group $Default The consumer group of your event hub.
location China East 2 The location of the data connection resource.
databaseRouting Multi or Single The database routing for the connection. If you set the value to Single, the data connection will be routed to a single database in the cluster as specified in the databaseName setting. If you set the value to Multi, you can override the default target database using the Database ingestion property. For more information, see Events routing.

Clean up resources

To delete the data connection, use the following command:

kusto_management_client.data_connections.delete(resource_group_name=resource_group_name, cluster_name=kusto_cluster_name, database_name=kusto_database_name, data_connection_name=kusto_data_connection_name)