Set auto_provisioning_defaults.service_account ? (beta-public)

[lemaral]

When enabling node autoprovisioning, the service account for it stays at "default" and nodes in "automatic" node pools have no rights on Google APIs (e.g. pull from private GCR)
I would have expected that the service account would be set to the same one that is created for the "regular" node pools so that pods scheduled or rescheduled on the automatic node pools would work the same (at least by default).
I believe it is in auto_provisioning_defaults.service_account

[morgante]

Yes we should fill in this property: https://www.terraform.io/docs/providers/google/r/container_cluster.html#service_account

Happy to review a PR.

[dpetersen]

In my testing, it seems like NAP wouldn't create any new Node Pools until I went into the web UI for my Terraformed cluster and selected a Service Account in the Node Auto-Provisioning section. I couldn't actually find any errors in the logs, it just wouldn't do anything no matter what I tried. Just mentioning this for anyone else who is similarly stumped.

I would love this to work, so I will attempt a PR if I can figure it out.

[morgante]

FYI I think the fix is what I mentioned above.

[morgante]

Fixed by #639.