Policy

Defines an Identity and Access Management (IAM) policy. It is used to specify access control policies for Cloud Platform resources.

A Policy consists of a list of bindings. A Binding binds a list of members to a role, where the members can be user accounts, Google groups, Google domains, and service accounts. A role is a named list of permissions defined by IAM.

Example

{
  "bindings": [
    {
      "role": "roles/owner",
      "members": [
        "user:mike@example.com",
        "group:admins@example.com",
        "domain:google.com",
        "serviceAccount:my-other-app@appspot.gserviceaccount.com",
      ]
    },
    {
      "role": "roles/viewer",
      "members": ["user:sean@example.com"]
    }
  ]
}

For a description of IAM and its features, see the IAM developer's guide.

JSON representation
{
  "version": number,
  "bindings": [
    {
      object(Binding)
    }
  ],
  "etag": string,
}
Fields
version

number

Version of the Policy. The default version is 0.

bindings[]

object(Binding)

Associates a list of members to a role. bindings with no members will result in an error.

etag

string (bytes format)

etag is used for optimistic concurrency control as a way to help prevent simultaneous updates of a policy from overwriting each other. It is strongly suggested that systems make use of the etag in the read-modify-write cycle to perform policy updates in order to avoid race conditions: An etag is returned in the response to getIamPolicy, and systems are expected to put that etag in the request to setIamPolicy to ensure that their change will be applied to the same version of the policy.

If no etag is provided in the call to setIamPolicy, then the existing policy is overwritten blindly.

A base64-encoded string.

Binding

Associates members with a role.

JSON representation
{
  "role": string,
  "members": [
    string
  ],
}
Fields
role

string

Role that is assigned to members. For example, roles/viewer, roles/editor, or roles/owner. Required

members[]

string

Specifies the identities requesting access for a Cloud Platform resource. members can have 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, alice@gmail.com or joe@example.com.

  • serviceAccount:{emailid}: An email address that represents a service account. For example, my-other-app@appspot.gserviceaccount.com.

  • group:{emailid}: An email address that represents a Google group. For example, admins@example.com.

  • domain:{domain}: A Google Apps domain name that represents all the users of that domain. For example, google.com or example.com.

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Cloud Identity and Access Management