Support for built-in IOT Hub EventHub endpoint in resources: azurerm_eventhub_authorization_rule and azurerm_iothub_endpoint_eventhub

[tomaszszlek]

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Description

Terraform provider doesn't have support for built-in IOTHub EventHub endpoint.
There are two missing things to support such endpoint:

1. Terraform provider offer resource called "azurerm_eventhub_authorization_rule".
   It allows to refer to specific EventHub by providing EventHub name and namespace.
   Unfortunately it doesn't support built-in IOTHub EventHub endpoint.
   Such endpoint doesn't have explicit "EventHub namespace" which is required by "azurerm_eventhub_authorization_rule" so I don't know what to put as an namespace.
   For now I have work around for this by providing connection_string in plain text when referencing EventHub in other endpoint however I would like to use azurerm_eventhub_authorization_rule.
2. azurerm_iothub_endpoint_eventhub doesn't support endpoint-resource-group. Using Azure CLI it is possible to declare EventHub in specific resource group however when creating this by Terraform resource group of EventHub endpoint is always empty.

New or Affected Resource(s)

• azurerm_eventhub_authorization_rule
• azurerm_iothub_endpoint_eventhub

Terraform Configuration

data "azurerm_eventhub_authorization_rule" "test" {
  name                = "test"
  namespace_name      = "I don't have namespace as it is not explicit in build-in IOTHub EventHub !"
  eventhub_name       = "${azurerm_eventhub.test.name}"
  resource_group_name = "${azurerm_resource_group.test.name}"
}

resource "azurerm_iothub_endpoint_eventhub" "example" {
  resource_group_name = azurerm_resource_group.example.name
  iothub_name         = azurerm_iothub.example.name
  name                = "example"

  connection_string = azurerm_eventhub_authorization_rule.test.primary_connection_string
}

[catriona-m]

fixed in #14942

[github-actions]

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