Support for routingPolicy in DNS Routing policies

[kaushalringle]

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Description

How can I add DNS routing policies to google_dns_record_set for WRR routing policy which can be seen here https://cloud.google.com/dns/docs/zones/manage-routing-policies , Terraform resource only shows options for rrdatas here https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/dns_record_set#rrdatas.

for eg I want add routingPolicy instead of rrdatas so the options like weight can be added, snap of the API call looks like this

"routingPolicy": {
        "wrr": {
          "item": [
            {
              "weight": .5,
              "rrdata": [
                "10.X.X.A"
              ]
            },
            {
              "weight": .5,
              "rrdata": [
                "10.X.X.B"
              ]
            }
          ]
        }
      }

New or Affected Resource(s)

• google_dns_record_set

Potential Terraform Configuration

Which would look something like this

# Propose what you think the configuration to take advantage of this feature should look like.
# We may not use it verbatim, but it's helpful in understanding your intent.

resource "google_dns_record_set" "a" {
  name         = "backend.${google_dns_managed_zone.prod.dns_name}"
  managed_zone = google_dns_managed_zone.prod.name
  type         = "A"
  ttl          = 300

  routingPolicy = {
        "wrr": {
          "item": [
            {
              "weight": .5,
              "rrdata": [
                "10.X.X.A"
              ]
            },
            {
              "weight": .5,
              "rrdata": [
                "10.X.X.B"
              ]
            }
          ]
  }
}

resource "google_dns_managed_zone" "prod" {
  name     = "prod-zone"
  dns_name = "prod.mydomain.com."
}

References

Google Docs --> https://cloud.google.com/dns/docs/zones/manage-routing-policies
Terraform Resource --> https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/dns_record_set#adding-an-a-record

• Internal issue

[rileykarson]

Note: Our implementation of this resource is not based on the ResourceRecordSet API, so this may required a new resource. @c2thorn to investigate.

[c2thorn]

This field is only available via the v1beta1 or v2beta1 versions of the DNS client library. Right now, both google and google-beta providers use the v1 version, so implementing this would require extensive testing to make sure the google-beta version does not break users. Otherwise, it should be possible via the same resource

[erikjoh]

Hi!
Looks like routingPolicy is now available in v1.
https://cloud.google.com/dns/docs/reference/v1/resourceRecordSets
In addition to routingPolicy.wrr we would be interested in routingPolicy.geo as well (and I assume that field would also be supported).

[rosmo]

I'd suggest a more Terraform'y approach:

routing_policy {
  wrr {
    item {
      rrdatas = [ "10.X.X.A" ]
      weight = 0.5
    }
    item {
      rrdatas = [ "10.X.X.B" ]
      weight = 1.0
    }
  } 
  geo {
    item {
      rrdatas = [ "10.X.X.C" ]
      weight = 1.0
    }
  } 
}

[ms185570]

Would this issue also cover the geo-based option for DNS records?

[kanata2]

I'm working on this issue at GoogleCloudPlatform/magic-modules#5909.
Please feel free to comment if you have any opinion about the implementation.

sample in current implementation:

resource "google_dns_record_set" "sample" {
  ...
  // rrdatas      = ["127.0.0.1", "127.0.0.2"]

  routing_policy {
    // geo {
    //   region  = "asia-northeast1"
    //   rrdatas = ["127.0.0.1"]
    // }

    // geo {
    //   region  = "asia-east1"
    //   rrdatas = ["127.0.0.2"]
    // }

    wrr {
      weight  = 90.0
      rrdatas = ["127.0.0.1"]
    }

    wrr {
      weight  = 10.0
      rrdatas = ["127.0.0.2"]
    }
  }
}

[github-actions]

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