Terraform-provider-libvirt: flatcar linux: fw_cfg has been updated

[tormath1]

System Information

Linux distribution

arch linux

Terraform version

$ terraform -v
Terraform v0.12.6

Provider and libvirt versions

$ terraform-provider-libvirt -version
5c01d18431ea2b9df4870990be6a1736ec6f322a
Compiled against library: libvirt 5.5.0
Using library: libvirt 5.5.0
Running hypervisor: QEMU 4.0.0
Running against daemon: 5.5.0

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Description of Issue/Question

Hi ! I am using this plugin in order to deploy flatcar linux cluster on libvirt. FYI flatcar linux is a fork of coreOS container linux (https://www.flatcar-linux.org/).

Back in the days, the ignition config file was given to the domain through fw_cfg, but the key value has changed from opt/com.coreos/config to opt/com.flatcar-linux/config. (https://github.com/flatcar-linux/ignition/issues/2)

It could be nice to specify the value of the key in terraform config file ?
https://github.com/dmacvicar/terraform-provider-libvirt/blob/5c01d18431ea2b9df4870990be6a1736ec6f322a/libvirt/domain.go#L240-L249

[MalloZup]

@tormath1 thx. I think it should be not really difficult to convert it to a variable. thx for issue

[tormath1]

Ok, I am on it. :rocket:

[MalloZup]

@tormath1 considering this closed by your pr. Feel free to squash commits