Creating google_dns_record_set with rrdatas from google_dns_keys data source causes replacement due to case differences

[MontyD]

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Terraform Version

Terraform v0.13.6
+ provider registry.terraform.io/hashicorp/google v3.66.1
+ provider registry.terraform.io/hashicorp/google-beta v3.66.1

Affected Resource(s)

• google_dns_record_set

Terraform Configuration Files

data "google_dns_keys" "project" {
  managed_zone = "managed_zone_id"
}

resource "google_dns_record_set" "project_keys" {
  managed_zone = "target_managed_zone_id"
  project      = "target_project"

  name = "google_dns_managed_zone.project.dns_name"
  type = "DS"
  rrdatas = [
    for ksk in data.google_dns_keys.project.key_signing_keys : ksk.ds_record
  ]
  ttl = 300
}

Expected Behaviour

After initial creation google_dns_record_set.project_keys should not be recreated on subsequent applies.

Actual Behaviour

On every apply google_dns_record_set.project_keys is replaced because the rrdatas change case, e.g.:

  # google_dns_record_set.project_keys must be replaced
-/+ resource "google_dns_record_set" "project_keys" {
      ~ id           = "projects/test/managedZones/product/rrsets/test.dev.null./DS" -> (known after apply)
        managed_zone = "product"
        name         = "test.dev.null."
        project      = "test"
      ~ rrdatas      = [ # forces replacement
          - "13244 1 1 55sd323sddf323356huku",
          + "13244 1 1 55SD323SDDF323356HUKU",
        ]
        ttl          = 300
        type         = "DS"
    }

Steps to Reproduce

1. terraform apply
2. terraform apply for a second time and see that the google_dns_record_set is recreated.

[rjw57]

GoogleCloudPlatform/magic-modules#4769 opened which should fix this

[github-actions]

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