Add support for generating terraform files from existing infrastructure (terraformer support, reverse terraform)

[userbradley]

This is a continuation of this issue to have a terraform import.

Items to import would be:

• VM's
• networks -SR's -Disks

These seem to be the most used items that I would want to manage through IaC

[ddelnano]

I have an initial implementation of this with #138 and https://github.com/GoogleCloudPlatform/terraformer/pull/846. Initially, this will only support the xenorchestra_acl and xenorchestra_resource_set resources.

The resources you mentioned are definitely important to support but have the following problems at the moment:

• VM - this resource is the most complex and until some issues are fixed (like #100) the generation process will likely result in terraform code that will need to be manually tweaked. I intend to support this but it would require lots of testing and so for the initial support I decided it was outside the scope
• Network - there is no network resource until #119 is implemented
• SR - there is no storage repository resource until # is implemented
• Disks - there is no vdi resource at the moment

While the resources you named won't be included in the initial support, getting the project working with terraformer with a few resources is a good first step.

[ddelnano]

Binaries are now available on the terraformer project as of 0.8.12. I'll write up some instructions on how to use this and then I think the initial support can be considered complete.

I'll likely track the future improvements for the VM, network, sr and disk resources in a new issue.

[userbradley]

Awesome work!

Sorry it took so long to get back to this.