Terraform-provider-google: Add support for Service Accounts and IAM roles to Cloud Run

[mbrancato]

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Description

Currently, the google_cloud_run_service resource cannot assign a service account, so all revisions run as the default compute service account which can be undesirable from a security perspective. My use-case here is I want to deploy an app with a service account specific to that app with only the IAM roles needed for things like storage and KMS access.

The IAM assignment is needed as this controls if a Cloud Run endpoint is accessible unauthenticated from the Internet or not.

New or Affected Resource(s)

• google_cloud_run_service
• google_cloud_run_service_iam_*

Potential Terraform Configuration

resource "google_cloud_run_service" "default" {
  name     = "app-name"
  location = "us-central1"

  metadata {
    namespace = "projectname"
  }

  spec {
    containers {
      image = "us.gcr.io/projectname/app:1.0"
    }
  }

  service_account {
    email  = "${google_service_account.app.email}"
    scopes = ["cloud-platform"]
  }
}

resource "google_cloud_run_service_iam_member" "invoker" {
  instance     = "app-name"
  role         = "roles/run.invoker"
  member       = "allUsers"
}

References

• #3421

[rkettelerij]

Currently this prevents the use of Terraform to create Google Cloud Endpoints for Cloud Run. Since Cloud Endpoints with Cloud Run requires specifying an IAM policy (e.g. gcloud beta run services add-iam-policy-binding).

[dinvlad]

A bit unrelated, but Cloud Function resources also don't seem to support IAM policy in TF.
EDIT: Correction, looks like this has been addressed in #4420

[joshua9519]

Is this something anyone can do? I have seen in the magic modules repo, there is a comment for the service account section of cloud run that this will be done by the cloud run people?
https://github.com/GoogleCloudPlatform/magic-modules/blob/0211126a3474b49e6f64172b0c6228f048b200c7/products/cloudrun/api.yaml#L454

[slevenick]

Going to be taking a look at adding the IAM policy and binding resources for this.

Adding service accounts to cloud run services was done via: https://github.com/GoogleCloudPlatform/magic-modules/pull/2740

[slevenick]

Finished support for IAM resources for the Cloud Run Service resource. This will be available in the next release of the provider (3.2.0)

[hashibot[bot]]

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