The GCP backend apparently lowercases the values, no matter what you
enter, so we consider uppercase and lowercase values to be equivalent.
This fixes#862.
* Add import support to google_dns_record_set
* Add import test to NS record
* Minimize diff change
* Improve docs
* Make error message more helpful
* Add note about trailing dot at the end of the record name
We introduced special handling for NS records in 1.2.0 under the
assumption that ALL NS records can't be deleted. This isn't actually
true. Only NS records for the naked domain of the managed zone can't be
removed; all other NS records can be. Because of this, 1.2.0 contains a
bug where all NS records are removed.
This update fixes the situation to only use special handling on NS
records that are for the naked root domain of the managed zone, and
treat all subdomain NS records as normal records. It also adds a test to
ensure this functionality.
Fixes#729.
Cloud DNS requires every managed zone to have an NS record at all times.
This means if people want to manage their own NS records, we need to add
their new record and remove the old one in the same call. It also means
we can't delete NS records, as we wouldn't know what to replace it with.
So deleting of NS records short-circuits. For the case of `terraform
destroy`, this prevents the error. It does mean if the user explicitly
tries to remove their NS zone from their project, it silently does
nothing, but that's unavoidable unless we want to A) restore a default
value (and it looks like the default values change from zone to zone?
And that is arguably just as unexpected?) or B) let the (arguably more
reasonable) `terraform destroy` case be impossible.
