Read file and save output to local_file - azure

Question

I'm trying to read the content of a file on an azurerm_linux_virtual_machine and save it to a local_file so that an ansible playbook can reference it later. Currently the .tf looks like this
resource "azurerm_linux_virtual_machine" "vm" {
name = myvm
location = myzone
resource_group_name = azurerm_resource_group.azureansibledemo.name
network_interface_ids = [azurerm_network_interface.myterraformnic.id]
size = "Standard_DS1_v2"
os_disk {
name = "storage"
caching = "ReadWrite"
storage_account_type = "Premium_LRS"
}
source_image_reference {
publisher = "Canonical"
offer = "UbuntuServer"
sku = "16.04-LTS"
version = "latest"
}
computer_name = myvm
admin_username = "azureuser"
disable_password_authentication = true
custom_data = base64encode(file("telnet.sh"))
admin_ssh_key {
username = "azureuser"
public_key = tls_private_key.ansible_ssh_key.public_key_openssh
}
boot_diagnostics {
storage_account_uri = azurerm_storage_account.mystorageaccount.primary_blob_endpoint
}
}
output "myoutput" {
value = file("/tmp/output.yml")
}
resource "local_file" "testoutput" {
content = <<-DOC
${file("/tmp/output.yml")}
DOC
filename = "test.yml"
}
But when i run terraform plan i get the following error
Error: Invalid function argument
on main.tf line 181, in resource "local_file" "testoutput":
181: ${file("/tmp/output.yml")}
Invalid value for "path" parameter: no file exists at /tmp/output.yml; this
function works only with files that are distributed as part of the
configuration source code, so if this file will be created by a resource in
this configuration you must instead obtain this result from an attribute of
that resource.
The output myoutput is fine and returns no errors, this only occurs when i add in the resource local_file. Is there a way to get the output of a file to a local_file?

Answer 1

Copping remote files to local is not supported by TF.
The workaround is to use scp in local-exec as shown here. For example:
provisioner "local-exec" {
command = "scp -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -i ${var.openstack_keypair} ubuntu#${openstack_networking_floatingip_v2.wr_manager_fip.address}:~/client.token ."
}