IAM policy for projects

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

  • google_project_iam_policy: Authoritative. Sets the IAM policy for the project and replaces any existing policy already attached.
  • google_project_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 project are preserved.
  • google_project_iam_member: Non-authoritative. Updates the IAM policy to grant a role to a new member. Other members for the role for the project are preserved.


resource "google_project_iam_policy" "project" {
  project     = "your-project-id"
  policy_data = "${data.google_iam_policy.admin.policy_data}"

data "google_iam_policy" "admin" {
  binding {
    role = "roles/editor"

    members = [
      "user:[email protected]",


resource "google_project_iam_binding" "project" {
  project = "your-project-id"
  role    = "roles/editor"

  members = [
    "user:[email protected]",


resource "google_project_iam_member" "project" {
  project = "your-project-id"
  role    = "roles/editor"
  member  = "user:[email protected]"

Argument Reference

The following arguments are supported:

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

    • 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_project_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_project_iam_policy) The google_iam_policy data source that represents the IAM policy that will be applied to the project. The policy will be merged with any existing policy applied to the project.

    Changing this updates the policy.

    Deleting this removes the policy, but leaves the original project policy intact. If there are overlapping binding entries between the original project policy and the data source policy, they will be removed.

  • project - (Optional) The project ID. If not specified, uses the ID of the project configured with the provider.

  • authoritative - (DEPRECATED) (Optional, only for google_project_iam_policy) A boolean value indicating if this policy should overwrite any existing IAM policy on the project. When set to true, any policies not in your config file will be removed. This can lock you out of your project until an Organization Administrator grants you access again, so please exercise caution. If this argument is true and you want to delete the resource, you must set the disable_project argument to true, acknowledging that the project will be inaccessible to anyone but the Organization Admins, as it will no longer have an IAM policy. Rather than using this, you should use google_project_iam_binding and google_project_iam_member.

  • disable_project - (DEPRECATED) (Optional, only for google_project_iam_policy) A boolean value that must be set to true if you want to delete a google_project_iam_policy that is authoritative.

Attributes Reference

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

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

  • restore_policy - (DEPRECATED) (Computed, only for google_project_iam_policy) The IAM policy that will be restored when a non-authoritative policy resource is deleted.


IAM resources can be imported using the project_id, role, and account.

$ terraform import google_project_iam_policy.my_project your-project-id

$ terraform import google_project_iam_binding.my_project "your-project-id roles/viewer"

$ terraform import google_project_iam_member.my_project "your-project-id roles/viewer [email protected]"

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