cpu property under agent_setting block is not working when agent_pool_name is set

[eddy-vera]

Is there an existing issue for this?

• I have searched the existing issues

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Terraform Version

1.9.8

AzureRM Provider Version

4.10.0

Affected Resource(s)/Data Source(s)

azurerm_container_registry_task

Terraform Configuration Files

resource "azurerm_container_registry_task" "example" {
  name                  = "example-task"
  container_registry_id = azurerm_container_registry.example.id
  agent_pool_name       = azurerm_container_registry_agent_pool.example.name

  agent_setting {
    cpu = 2
  }

  platform {
    os = "Linux"
  }

  docker_step {
    dockerfile_path      = "Dockerfile"
    context_path         = "https://github.com/<username>/<repository>#<branch>:<folder>"
    context_access_token = "<github personal access token>"
    image_names          = ["helloworld:{{.Run.ID}}"]
  }
}

Debug Output/Panic Output

N/A

Expected Behaviour

Agent Setting (configuration) CPU being set on the ACR task:

Actual Behaviour

Terraform plan and apply runs fine:

However, when running a TF plan again after a successful apply you get:

This is due to Agent Setting (Configuration) CPU not being set:

So either agent_setting or agent_pool_name can be set, but there is no validation in the plan/apply.
Also, the documentation does not mention this and should be updated with a note that either of the two should be set.
In addition, the only accepted value for 'cpu' under the 'agent_setting' block is 2. If any other value is provided it gives an error:
InnerErrors: AgentProperties:Invalid value for CPU core count. The supported values are (2)
The documentation should also reflect this.

Steps to Reproduce

1. Run Terraform apply with:

resource "azurerm_container_registry_task" "example" {
  name                  = "example-task"
  container_registry_id = azurerm_container_registry.example.id
  agent_pool_name       = azurerm_container_registry_agent_pool.example.name

  agent_setting {
    cpu = 2
  }

  platform {
    os = "Linux"
  }

  docker_step {
    dockerfile_path      = "Dockerfile"
    context_path         = "https://github.com/<username>/<repository>#<branch>:<folder>"
    context_access_token = "<github personal access token>"
    image_names          = ["helloworld:{{.Run.ID}}"]
  }
}

2. Run Terraform plan again

Important Factoids

No response

References

No response

[eddy-vera]

Thanks @magodo for the schema validation and update of the documentation.