Leaving azurerm_kubernetes_cluster ssh_key key_data blank causes a terraform crash

[katbyte]

Terraform Version

Terraform v0.11.3
+ provider.azurerm (unversioned)
+ provider.random v1.1.0

Affected Resource(s)

• terraform-provider-azurerm

Terraform Configuration Files

#from example
resource "azurerm_kubernetes_cluster" "aks_container" {
    name        = "akc-${random_integer.random_int.result}"
    location    = "${var.resource_group_location}"
    dns_prefix  = "akc-${random_integer.random_int.result}"

    resource_group_name = "${azurerm_resource_group.akc-rg.name}"
    kubernetes_version  = "1.8.7"


    linux_profile {
        admin_username = "${var.linux_admin_username}"
        ssh_key {
            key_data = ""
        }
    }

    agent_pool_profile {
        name        = "agentpool"
        count       = "2"
        vm_size     = "Standard_DS2_v2"
        os_type     = "Linux"
    }

    service_principal {
        client_id     = "${var.client_id}"
        client_secret = "${var.client_secret}"
    }
}

Debug Output

https://gist.github.com/katbyte/102cc21b01c10901386e1b564cfd17ab

Panic Output

https://gist.github.com/katbyte/102cc21b01c10901386e1b564cfd17ab

Expected Behavior

A graceful failure.

Actual Behavior

Terraform actually crashed.

Steps to Reproduce

Leave the ssh_key data blank

Important Factoids

no

References

• Feature Request: azurerm_kubernetes_cluster: Make linux_profile optional #896

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