Google Cloud Spanner Instance IAM
This page shows how to write Terraform for Cloud Spanner Instance IAM and write them securely.
The Instance IAM in Cloud Spanner can be configured in Terraform with the resource name
google_spanner_instance_iam. The following sections describe how to use the resource and its parameters.
Example Usage from GitHub
An example could not be found in GitHub.
The following arguments are supported:
instance- (Required) The name of the instance.
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@example.com or firstname.lastname@example.org.
- serviceAccount:[emailid]: An email address that represents a service account. For example, email@example.com.
- group:[emailid]: An email address that represents a Google group. For example, firstname.lastname@example.org.
- domain:[domain]: A G Suite domain (primary, instead of alias) 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_spanner_instance_iam_bindingcan be used per role. Note that custom roles must be of the format
policy_data- (Required only by
google_spanner_instance_iam_policy) The policy data generated by a
project- (Optional) The ID of the project in which the resource belongs. If it is not provided, the provider project is used.
In addition to the arguments listed above, the following computed attributes are exported:
etag- (Computed) The etag of the instance's IAM policy.
Explanation in Terraform Registry
Three different resources help you manage your IAM policy for a Spanner instance. Each of these resources serves a different use case:
google_spanner_instance_iam_policy: Authoritative. Sets the IAM policy for the instance and replaces any existing policy already attached.
Warning: It's entirely possibly to lock yourself out of your instance using
google_spanner_instance_iam_policy. Any permissions granted by default will be removed unless you include them in your config.
google_spanner_instance_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 instance are preserved.
google_spanner_instance_iam_member: Non-authoritative. Updates the IAM policy to grant a role to a new member. Other members for the role for the instance are preserved.
google_spanner_instance_iam_policycannot be used in conjunction with
google_spanner_instance_iam_memberor they will fight over what your policy should be.
google_spanner_instance_iam_bindingresources can be used in conjunction with
google_spanner_instance_iam_memberresources only if they do not grant privilege to the same role.