Create an Event Hub data connection for Azure Synapse Data Explorer by using Azure Resource Manager template (Preview)
Azure Synapse Data Explorer is a fast and highly scalable data exploration service for log and telemetry data. Azure Synapse Data Explorer offers ingestion (data loading) from Event Hubs, IoT Hubs, and blobs written to blob containers.
In this article, you create an Event Hub data connection for Azure Synapse Data Explorer by using Azure Resource Manager template.
Prerequisites
An Azure subscription. Create a free Azure account.
Create a Data Explorer pool using Synapse Studio or the Azure portal
Create a Data Explorer database.
In Synapse Studio, on the left-side pane, select Data.
Select + (Add new resource) > Data Explorer pool, and use the following information:
Setting Suggested value Description Pool name contosodataexplorer The name of the Data Explorer pool to use Name TestDatabase The database name must be unique within the cluster. Default retention period 365 The time span (in days) for which it's guaranteed that the data is kept available to query. The time span is measured from the time that data is ingested. Default cache period 31 The time span (in days) for which to keep frequently queried data available in SSD storage or RAM, rather than in longer-term storage. Select Create to create the database. Creation typically takes less than a minute.
Create a table on your test cluster
Create a table named StormEvents that matches the schema of the data in the StormEvents.csv file.
Tip
The following code snippets create an instance of a client for almost every call. This is done to make each snippet individually runnable. In production, the client instances are reentrant, and should be kept as long as needed. A single client instance per URI is sufficient, even when working with multiple databases (database can be specified on a command level).
var databaseName = "<DatabaseName>";
var table = "StormEvents";
using (var kustoClient = KustoClientFactory.CreateCslAdminProvider(kustoConnectionStringBuilder))
{
var command =
CslCommandGenerator.GenerateTableCreateCommand(
table,
new[]
{
Tuple.Create("StartTime", "System.DateTime"),
Tuple.Create("EndTime", "System.DateTime"),
Tuple.Create("EpisodeId", "System.Int32"),
Tuple.Create("EventId", "System.Int32"),
Tuple.Create("State", "System.String"),
Tuple.Create("EventType", "System.String"),
Tuple.Create("InjuriesDirect", "System.Int32"),
Tuple.Create("InjuriesIndirect", "System.Int32"),
Tuple.Create("DeathsDirect", "System.Int32"),
Tuple.Create("DeathsIndirect", "System.Int32"),
Tuple.Create("DamageProperty", "System.Int32"),
Tuple.Create("DamageCrops", "System.Int32"),
Tuple.Create("Source", "System.String"),
Tuple.Create("BeginLocation", "System.String"),
Tuple.Create("EndLocation", "System.String"),
Tuple.Create("BeginLat", "System.Double"),
Tuple.Create("BeginLon", "System.Double"),
Tuple.Create("EndLat", "System.Double"),
Tuple.Create("EndLon", "System.Double"),
Tuple.Create("EpisodeNarrative", "System.String"),
Tuple.Create("EventNarrative", "System.String"),
Tuple.Create("StormSummary", "System.Object"),
});
kustoClient.ExecuteControlCommand(databaseName, command);
}
Define ingestion mapping
Map the incoming CSV data to the column names used when creating the table. Provision a CSV column mapping object on that table.
var tableMapping = "StormEvents_CSV_Mapping";
using (var kustoClient = KustoClientFactory.CreateCslAdminProvider(kustoConnectionStringBuilder))
{
var command =
CslCommandGenerator.GenerateTableMappingCreateCommand(
Data.Ingestion.IngestionMappingKind.Csv,
table,
tableMapping,
new[] {
new ColumnMapping() { ColumnName = "StartTime", Properties = new Dictionary<string, string>() { { MappingConsts.Ordinal, "0" } } },
new ColumnMapping() { ColumnName = "EndTime", Properties = new Dictionary<string, string>() { { MappingConsts.Ordinal, "1" } } },
new ColumnMapping() { ColumnName = "EpisodeId", Properties = new Dictionary<string, string>() { { MappingConsts.Ordinal, "2" } } },
new ColumnMapping() { ColumnName = "EventId", Properties = new Dictionary<string, string>() { { MappingConsts.Ordinal, "3" } } },
new ColumnMapping() { ColumnName = "State", Properties = new Dictionary<string, string>() { { MappingConsts.Ordinal, "4" } } },
new ColumnMapping() { ColumnName = "EventType", Properties = new Dictionary<string, string>() { { MappingConsts.Ordinal, "5" } } },
new ColumnMapping() { ColumnName = "InjuriesDirect", Properties = new Dictionary<string, string>() { { MappingConsts.Ordinal, "6" } } },
new ColumnMapping() { ColumnName = "InjuriesIndirect", Properties = new Dictionary<string, string>() { { MappingConsts.Ordinal, "7" } } },
new ColumnMapping() { ColumnName = "DeathsDirect", Properties = new Dictionary<string, string>() { { MappingConsts.Ordinal, "8" } } },
new ColumnMapping() { ColumnName = "DeathsIndirect", Properties = new Dictionary<string, string>() { { MappingConsts.Ordinal, "9" } } },
new ColumnMapping() { ColumnName = "DamageProperty", Properties = new Dictionary<string, string>() { { MappingConsts.Ordinal, "10" } } },
new ColumnMapping() { ColumnName = "DamageCrops", Properties = new Dictionary<string, string>() { { MappingConsts.Ordinal, "11" } } },
new ColumnMapping() { ColumnName = "Source", Properties = new Dictionary<string, string>() { { MappingConsts.Ordinal, "12" } } },
new ColumnMapping() { ColumnName = "BeginLocation", Properties = new Dictionary<string, string>() { { MappingConsts.Ordinal, "13" } } },
new ColumnMapping() { ColumnName = "EndLocation", Properties = new Dictionary<string, string>() { { MappingConsts.Ordinal, "14" } } },
new ColumnMapping() { ColumnName = "BeginLat", Properties = new Dictionary<string, string>() { { MappingConsts.Ordinal, "15" } } },
new ColumnMapping() { ColumnName = "BeginLon", Properties = new Dictionary<string, string>() { { MappingConsts.Ordinal, "16" } } },
new ColumnMapping() { ColumnName = "EndLat", Properties = new Dictionary<string, string>() { { MappingConsts.Ordinal, "17" } } },
new ColumnMapping() { ColumnName = "EndLon", Properties = new Dictionary<string, string>() { { MappingConsts.Ordinal, "18" } } },
new ColumnMapping() { ColumnName = "EpisodeNarrative", Properties = new Dictionary<string, string>() { { MappingConsts.Ordinal, "19" } } },
new ColumnMapping() { ColumnName = "EventNarrative", Properties = new Dictionary<string, string>() { { MappingConsts.Ordinal, "20" } } },
new ColumnMapping() { ColumnName = "StormSummary", Properties = new Dictionary<string, string>() { { MappingConsts.Ordinal, "21" } } }
});
kustoClient.ExecuteControlCommand(databaseName, command);
}
Azure Resource Manager template for adding an Event Hub data connection
The following example shows an Azure Resource Manager template for adding an Event Hub data connection. You can edit and deploy the template in the Azure portal by using the form.
{
"$schema": "https://schema.management.azure.com/schemas/2015-01-01/deploymentTemplate.json#",
"contentVersion": "1.0.0.0",
"parameters": {
"namespaces_eventhubns_name": {
"type": "string",
"defaultValue": "eventhubns",
"metadata": {
"description": "Specifies the Event Hub Namespace name."
}
},
"EventHubs_eventhubdemo_name": {
"type": "string",
"defaultValue": "eventhubdemo",
"metadata": {
"description": "Specifies the Event Hub name."
}
},
"consumergroup_default_name": {
"type": "string",
"defaultValue": "$Default",
"metadata": {
"description": "Specifies the consumer group of the Event Hub."
}
},
"Clusters_kustocluster_name": {
"type": "string",
"defaultValue": "kustocluster",
"metadata": {
"description": "Specifies the name of the cluster"
}
},
"databases_kustodb_name": {
"type": "string",
"defaultValue": "kustodb",
"metadata": {
"description": "Specifies the name of the database"
}
},
"tables_kustotable_name": {
"type": "string",
"defaultValue": "kustotable",
"metadata": {
"description": "Specifies the name of the table"
}
},
"mapping_kustomapping_name": {
"type": "string",
"defaultValue": "kustomapping",
"metadata": {
"description": "Specifies the name of the mapping rule"
}
},
"dataformat_type": {
"type": "string",
"defaultValue": "csv",
"metadata": {
"description": "Specifies the data format"
}
},
"dataconnections_kustodc_name": {
"type": "string",
"defaultValue": "kustodc",
"metadata": {
"description": "Name of the data connection to create"
}
},
"subscriptionId": {
"type": "string",
"defaultValue": "[subscription().subscriptionId]",
"metadata": {
"description": "Specifies the subscriptionId of the Event Hub"
}
},
"resourceGroup": {
"type": "string",
"defaultValue": "[resourceGroup().name]",
"metadata": {
"description": "Specifies the resourceGroup of the Event Hub"
}
},
"location": {
"type": "string",
"defaultValue": "[resourceGroup().location]",
"metadata": {
"description": "Location for all resources."
}
}
},
"variables": {
},
"resources": [{
"type": "Microsoft.Kusto/Clusters/Databases/DataConnections",
"apiVersion": "2019-09-07",
"name": "[concat(parameters('Clusters_kustocluster_name'), '/', parameters('databases_kustodb_name'), '/', parameters('dataconnections_kustodc_name'))]",
"location": "[parameters('location')]",
"kind": "EventHub",
"properties": {
"eventHubResourceId": "[resourceId(parameters('subscriptionId'), parameters('resourceGroup'), 'Microsoft.EventHub/namespaces/eventhubs', parameters('namespaces_eventhubns_name'), parameters('EventHubs_eventhubdemo_name'))]",
"consumerGroup": "[parameters('consumergroup_default_name')]",
"tableName": "[parameters('tables_kustotable_name')]",
"mappingRuleName": "[parameters('mapping_kustomapping_name')]",
"dataFormat": "[parameters('dataformat_type')]"
}
}
]
}
Clean up resources
When the Azure resources are no longer needed, clean up the resources you deployed by deleting the resource group.
Clean up resources using the Azure portal
Delete the resources in the Azure portal by following the steps in clean up resources.
Clean up resources using PowerShell
If the Cloud Shell is still open, you don't need to copy/run the first line (Read-Host).
$projectName = Read-Host -Prompt "Enter the same project name that you used in the last procedure"
$resourceGroupName = "${projectName}rg"
Remove-AzResourceGroup -ResourceGroupName $resourceGroupName
Write-Host "Press [ENTER] to continue ..."