An Identity and Access Management (IAM) policy, which specifies access controls for Google Cloud resources.
A Policy is a collection of bindings. A binding binds one or more members, or principals, to a single role. Principals can be user accounts, service accounts, Google groups, and domains (such as G Suite). A role is a named list of permissions; each role can be an IAM predefined role or a user-created custom role.
For some types of Google Cloud resources, a binding can also specify a condition, which is a logical expression that allows access to a resource only if the expression evaluates to true. A condition can add constraints based on attributes of the request, the resource, or both. To learn which resources support conditions in their IAM policies, see the IAM documentation.
JSON example:
{
"bindings": [
{
"role": "roles/resourcemanager.organizationAdmin",
"members": [
"user:mike@example.com",
"group:admins@example.com",
"domain:google.com",
"serviceAccount:my-project-id@appspot.gserviceaccount.com"
]
},
{
"role": "roles/resourcemanager.organizationViewer",
"members": [
"user:eve@example.com"
],
"condition": {
"title": "expirable access",
"description": "Does not grant access after Sep 2020",
"expression": "request.time < timestamp('2020-10-01T00:00:00.000Z')",
}
}
],
"etag": "BwWWja0YfJA=",
"version": 3
}
YAML example:
bindings:
- members:
- user:mike@example.com
- group:admins@example.com
- domain:google.com
- serviceAccount:my-project-id@appspot.gserviceaccount.com
role: roles/resourcemanager.organizationAdmin
- members:
- user:eve@example.com
role: roles/resourcemanager.organizationViewer
condition:
title: expirable access
description: Does not grant access after Sep 2020
expression: request.time < timestamp('2020-10-01T00:00:00.000Z')
etag: BwWWja0YfJA=
version: 3
For a description of IAM and its features, see the IAM documentation.
| JSON representation |
|---|
{ "version": integer, "bindings": [ { object ( |
| Fields | |
|---|---|
version |
Specifies the format of the policy. Valid values are Any operation that affects conditional role bindings must specify version
Important: If you use IAM Conditions, you must include the If a policy does not include any conditions, operations on that policy may specify any valid version or leave the field unset. To learn which resources support conditions in their IAM policies, see the IAM documentation. |
bindings[] |
Associates a list of The |
auditConfigs[] |
Specifies cloud audit logging configuration for this policy. |
etag |
Important: If you use IAM Conditions, you must include the A base64-encoded string. |
Binding
Associates members, or principals, with a role.
| JSON representation |
|---|
{
"role": string,
"members": [
string
],
"condition": {
object ( |
| Fields | |
|---|---|
role |
Role that is assigned to the list of For an overview of the IAM roles and permissions, see the IAM documentation. For a list of the available pre-defined roles, see here. |
members[] |
Specifies the principals requesting access for a Google Cloud resource.
|
condition |
The condition that is associated with this binding. If the condition evaluates to If the condition evaluates to To learn which resources support conditions in their IAM policies, see the IAM documentation. |
Expr
Represents a textual expression in the Common Expression Language (CEL) syntax. CEL is a C-like expression language. The syntax and semantics of CEL are documented at https://github.com/google/cel-spec.
Example (Comparison):
title: "Summary size limit"
description: "Determines if a summary is less than 100 chars"
expression: "document.summary.size() < 100"
Example (Equality):
title: "Requestor is owner"
description: "Determines if requestor is the document owner"
expression: "document.owner == request.auth.claims.email"
Example (Logic):
title: "Public documents"
description: "Determine whether the document should be publicly visible"
expression: "document.type != 'private' && document.type != 'internal'"
Example (Data Manipulation):
title: "Notification string"
description: "Create a notification string with a timestamp."
expression: "'New message received at ' + string(document.create_time)"
The exact variables and functions that may be referenced within an expression are determined by the service that evaluates it. See the service documentation for additional information.
| JSON representation |
|---|
{ "expression": string, "title": string, "description": string, "location": string } |
| Fields | |
|---|---|
expression |
Textual representation of an expression in Common Expression Language syntax. |
title |
Optional. Title for the expression, i.e. a short string describing its purpose. This can be used e.g. in UIs which allow to enter the expression. |
description |
Optional. Description of the expression. This is a longer text which describes the expression, e.g. when hovered over it in a UI. |
location |
Optional. String indicating the location of the expression for error reporting, e.g. a file name and a position in the file. |
AuditConfig
Specifies the audit configuration for a service. The configuration determines which permission types are logged, and what identities, if any, are exempted from logging. An AuditConfig must have one or more AuditLogConfigs.
If there are AuditConfigs for both allServices and a specific service, the union of the two AuditConfigs is used for that service: the log_types specified in each AuditConfig are enabled, and the exemptedMembers in each AuditLogConfig are exempted.
Example Policy with multiple AuditConfigs:
{
"auditConfigs": [
{
"service": "allServices",
"auditLogConfigs": [
{
"logType": "DATA_READ",
"exemptedMembers": [
"user:jose@example.com"
]
},
{
"logType": "DATA_WRITE"
},
{
"logType": "ADMIN_READ"
}
]
},
{
"service": "sampleservice.googleapis.com",
"auditLogConfigs": [
{
"logType": "DATA_READ"
},
{
"logType": "DATA_WRITE",
"exemptedMembers": [
"user:aliya@example.com"
]
}
]
}
]
}
For sampleservice, this policy enables DATA_READ, DATA_WRITE and ADMIN_READ logging. It also exempts jose@example.com from DATA_READ logging, and aliya@example.com from DATA_WRITE logging.
| JSON representation |
|---|
{
"service": string,
"auditLogConfigs": [
{
object ( |
| Fields | |
|---|---|
service |
Specifies a service that will be enabled for audit logging. For example, |
auditLogConfigs[] |
The configuration for logging of each type of permission. |
AuditLogConfig
Provides the configuration for logging a type of permissions. Example:
{
"auditLogConfigs": [
{
"logType": "DATA_READ",
"exemptedMembers": [
"user:jose@example.com"
]
},
{
"logType": "DATA_WRITE"
}
]
}
This enables 'DATA_READ' and 'DATA_WRITE' logging, while exempting jose@example.com from DATA_READ logging.
| JSON representation |
|---|
{
"logType": enum ( |
| Fields | |
|---|---|
logType |
The log type that this config enables. |
exemptedMembers[] |
Specifies the identities that do not cause logging for this type of permission. Follows the same format of |
LogType
The list of valid permission types for which logging can be configured. Admin writes are always logged, and are not configurable.
| Enums | |
|---|---|
LOG_TYPE_UNSPECIFIED |
Default case. Should never be this. |
ADMIN_READ |
Admin reads. Example: CloudIAM getIamPolicy |
DATA_WRITE |
Data writes. Example: CloudSQL Users create |
DATA_READ |
Data reads. Example: CloudSQL Users list |