IAM policy for Pubsub Topic

Three different resources help you manage your IAM policy for pubsub topic. Each of these resources serves a different use case:

  • google_pubsub_topic_iam_policy: Authoritative. Sets the IAM policy for the topic and replaces any existing policy already attached.
  • google_pubsub_topic_iam_binding: Authoritative for a given role. Updates the IAM policy to grant a role to a list of members. Other roles within the IAM policy for the topic are preserved.
  • google_pubsub_topic_iam_member: Non-authoritative. Updates the IAM policy to grant a role to a new member. Other members for the role for the topic are preserved.


data "google_iam_policy" "admin" {
  binding {
    role    = "roles/editor"
    members = [
      "user:[email protected]",

resource "google_pubsub_topic_iam_policy" "editor" {
  topic       = "your-topic-name"
  policy_data = "${data.google_iam_policy.admin.policy_data}"


resource "google_pubsub_topic_iam_binding" "editor" {
  topic   = "your-topic-name"
  role    = "roles/editor"
  members = [
    "user:[email protected]",


resource "google_pubsub_topic_iam_member" "editor" {
  topic  = "your-topic-name"
  role   = "roles/editor"
  member = "user:[email protected]"

Argument Reference

The following arguments are supported:

  • topic - (Required) The topic name or id to bind to attach IAM policy to.

  • project - (Optional) The project in which the resource belongs. If it is not provided, the provider project is used.

  • member/members - (Required) Identities that will be granted the privilege in role. Each entry can have one of the following values:

    • allUsers: A special identifier that represents anyone who is on the internet; with or without a Google account.
    • allAuthenticatedUsers: A special identifier that represents anyone who is authenticated with a Google account or a service account.
    • user:{emailid}: An email address that represents a specific Google account. For example, [email protected] or [email protected].
    • serviceAccount:{emailid}: An email address that represents a service account. For example, [email protected].
    • group:{emailid}: An email address that represents a Google group. For example, [email protected].
    • domain:{domain}: A Google Apps domain name that represents all the users of that domain. For example, google.com or example.com.
  • role - (Required) The role that should be applied. Only one google_pubsub_topic_iam_binding can be used per role. Note that custom roles must be of the format [projects|organizations]/{parent-name}/roles/{role-name}.

  • policy_data - (Required only by google_pubsub_topic_iam_policy) The policy data generated by a google_iam_policy data source.

Attributes Reference

In addition to the arguments listed above, the following computed attributes are exported:

  • etag - (Computed) The etag of the topic's IAM policy.


Pubsub topic IAM resources can be imported using the project, topic name, role and member.

$ terraform import google_pubsub_topic_iam_policy.editor projects/{your-project-id}/topics/{your-topic-name}

$ terraform import google_pubsub_topic_iam_binding.editor "projects/{your-project-id}/topics/{your-topic-name} roles/editor"

$ terraform import google_pubsub_topic_iam_member.editor "projects/{your-project-id}/topics/{your-topic-name} roles/editor [email protected]"

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