request_coalescing missing from google_compute_backend_service cdn config

[villesau]

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Description

Backend bucket config has the field: https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/compute_backend_bucket#request_coalescing

but backend service does not have it: https://registry.terraform.io/providers/hashicorp/google/latest/docs/resources/compute_backend_service

However, it is supported by gcloud: https://cloud.google.com/cdn/docs/caching#request-coalescing

This is important to mitigate unnecessary load spikes for expensive resources.

New or Affected Resource(s)

• google_compute_backend_service

Potential Terraform Configuration

# 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_compute_backend_service" "default_backend_service" {
...
  cdn_policy {
    cache_mode                   = "CACHE_ALL_STATIC"
    request_coalescing        = true
  }
...
}

References

• #0000