Terraform-provider-google: Cloud Run revision already exists

[FallenHoot]

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Terraform Version

Terraform v0.12.23

Affected Resource(s)

google_cloud_run_service

Terraform Configuration Files

resource "google_cloud_run_service" "default" {
  name     = "cloudrun-srv"
  location = "us-central1"

  template {
    spec {
      containers {
        image = "gcr.io/cloudrun/hello:latest"
      }
    }
  }

  traffic {
    percent         = 100
    latest_revision = true
  }
}

Expected Behavior

I assumed that it would allow the latest revsion to be used unless told otherwise. Terraform has no control over the container revision and should just verify that the latest one is used.

Actual Behavior

Terraform errors out:
Error: Error updating Service "locations/europe-north1/namespaces/project-id/services/hello": googleapi: Error 409: Revision named 'hello-00005-raz' with different configuration already exists.

Steps to Reproduce

1. terraform init
2. terraform plan
3. terraform apply
4. Push new image to cloud run using Cloud Build
5. Redo 1-3

Important Factoids

Remote tfstate is located within GCP Cloud Storage
It uses a Terraform Service account running with Cloud Build CI/CD pipeline. It worked in that past, but since the code has been updated. It starts throwing this error listed above.

References

A few simular issues, but with different services.

1214

4394

[edwardmedia]

• b/151577360
  Log available in b/151577360

[hectorj]

Manually setting resource.google_cloud_run_service.default.template.metadata.name to a value matching the format hello-00005-raz (projectName-revisionNumber-3letterID) makes the update go through, though that's not a viable solution.

The revision name used to auto-update given a new configuration, I am not sure when it stopped doing so.

[c2thorn]

@hectorj You are correct. In order to autogenerate the revision name, the template.metadata.name must be omitted when Terraform sends the API request. Unfortunately once the revision name gets set in state, there is no way to unset the name to start autogenerating again (it is a computed field, so it will be read and set every time Terraform refreshes).

We are working on a solution to toggle revision name autogeneration via an extra field.

[c2thorn]

PR has been merged, and will likely be part of the 3.16.0 release scheduled for 4/6/2020.

We've added autogenerate_revision_name as a field. This will toggle the provider to ignore the revision name (template.metadata.name in state) and let it be managed server-side.

If you are receiving Error 409: Revision named '<revision name>' with different configuration already exists. setting autogenerate_revision_name=true will be the way to tell the provider you don't want to manage the revision name (after v3.16.0). Alternatively, you can manage the revision name yourself by changing template.metadata.name to a unique name for each update.

[hashibot[bot]]

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