Buckets: setIamPolicy

Updates an IAM policy for the specified bucket. Try it now.

Note: This method replaces any existing IAM policy set on a bucket. If you want to modify the existing policy, retrieve it with the getIamPolicy method, edit it as needed, and use the edited version in your setIamPolicy request.

The authenticated user must have sufficient permission to use this method.

Request

HTTP request

PUT https://storage.googleapis.com/storage/v1/b/bucket/iam

In addition to standard query parameters, the following query parameters apply to this method:

Parameters

Parameter name	Value	Description
Path parameters
bucket	string	Name of a bucket.

Request body

In the request body, supply data with the following structure:

{
  "version": int,
  "kind": "storage#policy",
  "resourceId": string,
  "bindings": [
    {
      "role": string,
      "members": [
        string
      ],
      "condition": {
        "title": string,
        "description": string,
        "expression": RFC 3339 format string
      }
    }],
  "etag": bytes
}

Property name	Value	Description	Notes
version	int	The IAM policy version. Required to be 3 or greater for buckets with IAM Conditions.
kind	string	The kind of item this is. For policies, this field is ignored in a request and is storage#policy in a response.
resourceId	string	The ID of the resource to which this policy belongs. The response for this field is of the form projects/_/buckets/bucket. This field is ignored in a request.
bindings[]	list	An association between a role, which comes with a set of permissions, and members who may assume that role.
bindings[].role	string	The role to which members belong. Two types of roles are supported: standard IAM roles, which grant permissions that do not map directly to those provided by ACLs, and legacy IAM roles, which do map directly to ACL permissions. All roles are of the format roles/storage.specificRole. See Cloud Storage IAM Roles for a list of available roles.
bindings[].members[]	list	A collection of identifiers for members who may assume the provided role. Recognized identifiers are as follows: allUsers — A special identifier that represents anyone 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 account. For example, user:[e-mail] or user:[e-mail]. serviceAccount:emailid — An email address that represents a service account. For example, serviceAccount:[e-mail] . group:emailid — An email address that represents a Google group. For example, group:[e-mail]. domain:domain — A G Suite domain name that represents all the users of that domain. For example, domain:google.com or domain:example.com. projectOwner:projectid — Owners of the given project. For example, projectOwner:my-example-project projectEditor:projectid — Editors of the given project. For example, projectEditor:my-example-project projectViewer:projectid — Viewers of the given project. For example, projectViewer:my-example-project
bindings[].condition	object	A condition object associated with this binding. Each role binding can only contain one condition.	optional
bindings[].condition.title	string	Title of the condition. For example, "expires_end_of_2018".
bindings[].condition.description	string	Optional description of the condition. For example, "Expires at midnight on 2018-12-31".	optional
bindings[].condition.expression	string	Attribute-based logic expression using a subset of the Common Expression Language (CEL). For example, "request.time < timestamp('2019-01-01T00:00:00Z')".
etag	bytes	HTTP 1.1 Entity tag for the policy.	writable

Response

If successful, this method returns a response body with the following structure:

{
  "version": int,
  "kind": "storage#policy",
  "resourceId": string,
  "bindings": [
    {
      "role": string,
      "members": [
        string
      ]
      "condition": {
        "title": string,
        "description": string,
        "expression": RFC 3339 format string
      }
    }
  ],
  "etag": bytes
}

Property name	Value	Description	Notes
version	int	The IAM policy version.
kind	string	The kind of item this is. For policies, this field is ignored in a request and is storage#policy in a response.
resourceId	string	The ID of the resource to which this policy belongs. The response for this field is of the form projects/_/buckets/bucket. This field is ignored in a request.
bindings[]	list	An association between a role, which comes with a set of permissions, and members who may assume that role.
bindings[].role	string	The role to which members belong. Two types of roles are supported: standard IAM roles, which grant permissions that do not map directly to those provided by ACLs, and legacy IAM roles, which do map directly to ACL permissions. All roles are of the format roles/storage.specificRole. See Cloud Storage IAM Roles for a list of available roles.
bindings[].members[]	list	A collection of identifiers for members who may assume the provided role. Recognized identifiers are as follows: allUsers — A special identifier that represents anyone 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 account. For example, user:[e-mail] or user:[e-mail]. serviceAccount:emailid — An email address that represents a service account. For example, serviceAccount:[e-mail] . group:emailid — An email address that represents a Google group. For example, group:[e-mail]. domain:domain — A G Suite domain name that represents all the users of that domain. For example, domain:google.com or domain:example.com. projectOwner:projectid — Owners of the given project. For example, projectOwner:my-example-project projectEditor:projectid — Editors of the given project. For example, projectEditor:my-example-project projectViewer:projectid — Viewers of the given project. For example, projectViewer:my-example-project
bindings[].condition	object	A condition object associated with this binding. Each role binding can only contain one condition.	optional
bindings[].condition.title	string	Title of the condition. For example, "expires_end_of_2018".
bindings[].condition.description	string	Optional description of the condition. For example, "Expires at midnight on 2018-12-31".	optional
bindings[].condition.expression	string	Attribute-based logic expression using a subset of the Common Expression Language (CEL). For example, "request.time < timestamp('2019-01-01T00:00:00Z')".
etag	bytes	HTTP 1.1 Entity tag for the policy.	writable

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