Create and apply principal access boundary policies

Principal access boundary (PAB) policies let you limit the resources that a set of principals are eligible to access. This page explains how to create and apply principal access boundary policies.

Before you begin

  • Set up authentication.

    Select the tab for how you plan to use the samples on this page:

    Console

    When you use the Google Cloud console to access Google Cloud services and APIs, you don't need to set up authentication.

    gcloud

    In the Google Cloud console, activate Cloud Shell.

    Activate Cloud Shell

    At the bottom of the Google Cloud console, a Cloud Shell session starts and displays a command-line prompt. Cloud Shell is a shell environment with the Google Cloud CLI already installed and with values already set for your current project. It can take a few seconds for the session to initialize.

    REST

    To use the REST API samples on this page in a local development environment, you use the credentials you provide to the gcloud CLI.

      Install the Google Cloud CLI, then initialize it by running the following command: 

      gcloud init

    For more information, see Authenticate for using REST in the Google Cloud authentication documentation.

  • Read the overview of principal access boundary policies.

Roles required to create principal access boundary policies

To get the permissions that you need to create principal access boundary policies, ask your administrator to grant you the Principal Access Boundary Admin (roles/iam.principalAccessBoundaryAdmin) IAM role on your organization. For more information about granting roles, see Manage access.

You might also be able to get the required permissions through custom roles or other predefined roles.

Roles required to apply principal access boundary policies

The permissions that you need in order to apply a principal access boundary policy depend on the principal set that you want to apply the policy to.

To get the permissions that you need to apply principal access boundary policies, ask your administrator to grant you the following IAM roles:

  • Principal Access Boundary User (roles/iam.principalAccessBoundaryUser) on the organization
  • Apply principal access boundary policies to Workforce Identity Federation pools: IAM Workforce Pool Admin (roles/iam.workforcePoolAdmin) on the target Workforce Identity Federation pool
  • Apply principal access boundary policies to Workload Identity Federation pools: IAM Workload Identity Pool Admin (roles/iam.workloadIdentityPoolAdmin) on the project that owns the target Workforce Identity Federation pool
  • Apply principal access boundary policies to a Google Workspace domain: Workspace Pool IAM Admin (roles/iam.workspacePoolAdmin) on the organization
  • Apply principal access boundary policies to a project's principal set: Project IAM Admin (roles/resourcemanager.projectIamAdmin) on the project
  • Apply principal access boundary policies to a folder's principal set: Folder IAM Admin (roles/resourcemanager.folderIamAdmin) on the folder
  • Apply principal access boundary policies to an organization's principal set: Organization Administrator (roles/resourcemanager.organizationAdmin) on the organization

For more information about granting roles, see Manage access.

You might also be able to get the required permissions through custom roles or other predefined roles.

Create a principal access boundary policy

You can create a principal access boundary policy using the Google Cloud console, the gcloud CLI, or the IAM REST API.

Console

  1. In the Google Cloud console, go to the Principal Access Boundary policies page.

    Go to Principal Access Boundary policies

  2. Select the organization that you want to create principal access boundary policies for.

  3. Click Create policy.

  4. Add principal access boundary policy rules to the policy:

    1. Click Add boundary rule.
    2. In the Description field, add a description of the principal access boundary policy rule. The description can be a maximum of 256 characters.

    3. In the Resources section, enter all of the Resource Manager resources (projects, folders, and organizations) that you want principals to be eligible to access. Any principal that is subject to this policy is eligible to access these resources.

      Each principal access boundary policy can reference a maximum of 500 resources across all rules in the policy.

    4. Click Done.

    5. To add additional policy rules, repeat these steps. Each principal access boundary policy can have up to 500 rules.

  5. In the Policy name section, enter a name for the policy. The name can be a maximum of 63 characters.

  6. In the Enforcement version list, select the enforcement version for the policy. The principal access boundary policy version determines which permissions IAM enforces the principal access boundary policy for.

    For more information about enforcement versions, see Principal access boundary enforcement versions.

  7. Click Create.

gcloud

The gcloud beta iam principal-access-boundary-policies create command creates a principal access boundary policy.

Before using any of the command data below, make the following replacements:

  • ORG_ID: The ID of the organization that you want to create the principal access boundary policy in. Organization IDs are numeric, like 123456789012.
  • PAB_POLICY_ID: A unique ID for the principal access boundary policy—for example, example-policy. :
  • DISPLAY_NAME: Optional. A human-readable description of the principal access boundary policy—for example, Example policy. The display name can be a maximum of 63 characters.

  • FILE_PATH: The path to a JSON file containing the principal access boundary policy rule details. This file should have the following format: 

    {
  "description": DESCRIPTION,
  "resources": [
    RESOURCES
  ],
  "effect": ALLOW
}

    Replace the following values:

    • DESCRIPTION: Optional. The description of the principal access boundary policy rule. The description can be a maximum of 256 characters.

    • RESOURCES: A list of Resource Manager resources (projects, folders, and organizations) that you want principals to be eligible to access. Any principal that is subject to this policy is eligible to access these resources.

      Each principal access boundary policy can reference a maximum of 500 resources across all rules in the policy.

  • ENFORCEMENT_VERSION: The version of principal access boundary policies that IAM uses when enforcing the policy. The enforcement version determines which permissions IAM enforces the principal access boundary policy for.

    Accepted values are 1 and latest.

    For more information about enforcement versions, see Principal access boundary enforcement versions.

Execute the following command:

Linux, macOS, or Cloud Shell

gcloud beta iam principal-access-boundary-policies create PAB_POLICY_ID \
    --organization=ORG_ID --location=global \
    --display-name=DISPLAY_NAME --detail-rules=FILE_PATH.json \
    --details-enforcement-version=ENFORCEMENT_VERSION

Windows (PowerShell)

gcloud beta iam principal-access-boundary-policies create PAB_POLICY_ID `
    --organization=ORG_ID --location=global `
    --display-name=DISPLAY_NAME --detail-rules=FILE_PATH.json `
    --details-enforcement-version=ENFORCEMENT_VERSION

Windows (cmd.exe)

gcloud beta iam principal-access-boundary-policies create PAB_POLICY_ID ^
    --organization=ORG_ID --location=global ^
    --display-name=DISPLAY_NAME --detail-rules=FILE_PATH.json ^
    --details-enforcement-version=ENFORCEMENT_VERSION

The response contains a long-running operation representing your request.

Create request issued for: [example-policy]
Waiting for operation [organizations/123456789012/locations/global/operations/operation-1715373988044-6181fa136df85-3b06a30a-4816d25b] to complete...done.
Created principalAccessBoundaryPolicy [example-policy].

REST

The principalAccessBoundaryPolicies.create method creates a principal access boundary policy.

Before using any of the request data, make the following replacements:

  • ORG_ID: The ID of the organization that you want to create the principal access boundary policy in. Organization IDs are numeric, like 123456789012.
  • PAB_POLICY_ID: A unique ID for the principal access boundary policy—for example, example-policy.
  • DISPLAY_NAME: Optional. A human-readable description of the principal access boundary policy—for example, Example policy. The display name can be a maximum of 63 characters.

  • PAB_RULES: A list of principal access boundary rules, which define the resources that affected principals are eligible to access. A principal access boundary policy can have up to 500 rules. Each rule has the following format: 

    {
"description": "DESCRIPTION",
"resources": [
  RESOURCES
],
"effect": ALLOW
}

    Replace the following values:

    • DESCRIPTION: Optional. The description of the principal access boundary policy rule. The description can be a maximum of 256 characters.

    • RESOURCES: A list of Resource Manager resources (projects, folders, and organizations) that you want principals to be eligible to access. Any principal that is subject to this policy is eligible to access these resources.

      Each principal access boundary policy can reference a maximum of 500 resources across all rules in the policy.

  • ENFORCEMENT_VERSION: The version of principal access boundary policies that IAM uses when enforcing the policy. The enforcement version determines which permissions IAM enforces the principal access boundary policy for.

    Accepted values are 1 and latest.

    For more information about enforcement versions, see Principal access boundary enforcement versions.

HTTP method and URL: 

POST https://iam.googleapis.com/v3beta/organizations/ORG_ID/locations/global?principalAccessBoundaryPolicyId=PAB_POLICY_ID

Request JSON body: 

{
  "displayName": DISPLAY_NAME,
  "details": {
    "rules": [
      PAB_RULES
    ],
    "effect": ALLOW
    }
  ],
  "enforcementVersion": "ENFORCEMENT_VERSION"
}

To send your request, expand one of these options:

The response contains a long-running operation representing your request.

{
  "name": "organizations/123456789012/locations/global/operations/operation-1715373120647-6181f6d8371d2-83309b71-2b8a7532",
  "metadata": {
    "@type": "type.googleapis.com/google.iam.v3beta.OperationMetadata",
    "createTime": "2024-05-10T20:32:00.898809495Z",
    "target": "organizations/123456789012/locations/global/policyBindings/example-policy",
    "verb": "create",
    "requestedCancellation": false,
    "apiVersion": "v3beta"
  },
  "done": false
}

Apply a principal access boundary policy to a principal set

To apply a principal access boundary policy to a principal set, create a policy binding resource that binds the policy to the principal set. After you create a policy binding, the principal access boundary policy in the binding is enforced for the principals in the binding.

You can create a policy binding using the Google Cloud console, the gcloud CLI, or the IAM REST API.

Console

  1. In the Google Cloud console, go to the Principal Access Boundary policies page.

    Go to Principal Access Boundary policies

  2. Select the organization that owns the principal access boundary policy that you want to create a binding for.

  3. Click the policy ID of the principal access boundary policy that you want to create a binding for.

  4. Click the Bindings tab, then click Add binding.

  5. Enter the binding details:

    1. Optional: In the Display name field, enter a display name for the binding. The display name can be a maximum of 63 characters.
    2. In the Binding ID field, enter a unique name for the binding—for example, example-binding.

    3. In the Target principal set section, enter the type and ID of the principal set that you want to bind the policy to. You can't change this value after you create the policy binding.

      To learn more about the principals included in each principal set, see Supported principal sets.

  6. Optional: To specify which principals in the principal set the principal access boundary policy is enforced for, add a condition to the binding:

    1. Click Add condition.
    2. In the Title field, enter a brief summary of the purpose of the condition.
    3. Optional: In the Description field, enter a longer description of the condition.
    4. In the Expression field, enter condition expression that uses the Common Expression Language (CEL) syntax. The expression must reference the principal.type or principal.subject attributes. Other attributes are not supported.
    5. Click Save.

  7. To create the binding, click Add.

gcloud

The gcloud beta iam policy-bindings create command creates a policy binding.

Before using any of the command data below, make the following replacements:

  • BINDING_ID: A unique name for the policy binding—for example, example-binding.

  • RESOURCE_TYPE: The type of the Resource Manager resource (project, folder, or organization) that the policy binding is a child of. Use the value project, folder, or organization

    The resource type depends on the principal set in the policy binding. To see which resource type to use, see Supported principal types.

  • RESOURCE_ID: The ID of the project, folder, or organization that the policy binding is a child of. Project IDs are alphanumeric strings, like my-project. Folder and organization IDs are numeric, like 123456789012.
  • ORG_ID: The ID of the organization that owns the principal access boundary policy that you want to bind to the principal set. Organization IDs are numeric, like 123456789012.
  • PAB_POLICY_ID: The ID of the principal access boundary policy that you want to bind to the principal set—for example, example-pab-policy. You can't change this value after you create the policy binding.
  • PRINCIPAL_SET: The principal set that you want to bind the policy to. For a list of valid principal types, see Supported principal sets. You can't change this value after you create the policy binding.
  • DISPLAY_NAME: Optional. A human-readable description of the binding—for example, Example binding. The display name can be a maximum of 63 characters.

  • CONDITION_DETAILS: Optional. A condition expression that specifies which principals in the principal set the principal access boundary policy is enforced for. Contains the following fields:

    • expression: A condition expression that uses Common Expression Language (CEL) syntax. The expression must reference the principal.type or principal.subject attributes. Other attributes are not supported.

      The expression can contain up to 10 logical operators (&&, ||, !), and can be up to 250 characters long.

    • title: Optional. A brief summary of the purpose of the condition.
    • description: Optional. A longer description of the condition.

Execute the following command:

Linux, macOS, or Cloud Shell

gcloud beta iam policy-bindings create BINDING_ID \
    --RESOURCE_TYPE=RESOURCE_ID --location=global \
    --policy="organizations/ORG_ID/locations/global/principalAccessBoundaryPolicies/PAB_POLICY_ID" \
    --target-principal-set=PRINCIPAL_SET_ID \
    --display-name=DISPLAY_NAME \
    CONDITION_DETAILS

Windows (PowerShell)

gcloud beta iam policy-bindings create BINDING_ID `
    --RESOURCE_TYPE=RESOURCE_ID --location=global `
    --policy="organizations/ORG_ID/locations/global/principalAccessBoundaryPolicies/PAB_POLICY_ID" `
    --target-principal-set=PRINCIPAL_SET_ID `
    --display-name=DISPLAY_NAME `
    CONDITION_DETAILS

Windows (cmd.exe)

gcloud beta iam policy-bindings create BINDING_ID ^
    --RESOURCE_TYPE=RESOURCE_ID --location=global ^
    --policy="organizations/ORG_ID/locations/global/principalAccessBoundaryPolicies/PAB_POLICY_ID" ^
    --target-principal-set=PRINCIPAL_SET_ID ^
    --display-name=DISPLAY_NAME ^
    CONDITION_DETAILS

The response contains a long-running operation representing your request.

Create request issued for: [example-binding]
Waiting for operation [organizations/123456789012/locations/global/operations/operation-1715374545618-6181fc272c6f9-55ff07f4-97d0ac76] to complete...done.
Created policyBinding [example-binding].

REST

The policyBindings.create method creates a policy binding.

Before using any of the request data, make the following replacements:

  • RESOURCE_TYPE: The type of the Resource Manager resource (project, folder, or organization) that the policy binding is a child of. Use the value projects, folders, or organizations

    The resource type depends on the principal set in the policy binding. To see which resource type to use, see Supported principal types.

  • RESOURCE_ID: The ID of the project, folder, or organization that the policy binding is a child of. Project IDs are alphanumeric strings, like my-project. Folder and organization IDs are numeric, like 123456789012.
  • BINDING_ID: A unique name for the policy binding—for example, example-binding.
  • DISPLAY_NAME: Optional. A human-readable description of the binding—for example, Example binding. The display name can be a maximum of 63 characters.
  • PRINCIPAL_SET: The principal set that you want to bind the policy to. For a list of valid principal types, see Supported principal sets. You can't change this value after you create the policy binding.
  • ORG_ID: The ID of the organization that owns the principal access boundary policy that you want to bind to the principal set. Organization IDs are numeric, like 123456789012.
  • PAB_POLICY_ID: The ID of the principal access boundary policy that you want to bind to the principal set—for example, example-pab-policy. You can't change this value after you create the policy binding.

  • CONDITION_DETAILS: Optional. A condition expression that specifies which principals in the principal set the principal access boundary policy is enforced for. Contains the following fields:

    • expression: A condition expression that uses Common Expression Language (CEL) syntax. The expression must reference the principal.type or principal.subject attributes. Other attributes are not supported.

      The expression can contain up to 10 logical operators (&&, ||, !), and can be up to 250 characters long.

    • title: Optional. A brief summary of the purpose of the condition.
    • description: Optional. A longer description of the condition.

HTTP method and URL: 

POST https://iam.googleapis.com/v3beta/RESOURCE_TYPE/RESOURCE_ID/locations/global/policyBindings?policyBindingId=BINDING_ID

Request JSON body: 

{
  "displayName": DISPLAY_NAME,
  "target": {
    "principalSet": PRINCIPAL_SET
  },
  "policyKind": "PRINCIPAL_ACCESS_BOUNDARY",
  "policy": "organizations/ORG_ID/locations/global/principalAccessBoundaryPolicies/PAB_POLICY_ID",
  "condition": {
    CONDITION_DETAILS
  }
}

To send your request, expand one of these options:

The response contains a long-running operation representing your request.

{
  "name": "organizations/123456789012/locations/global/operations/operation-1715373120647-6181f6d8371d2-83309b71-2b8a7532",
  "metadata": {
    "@type": "type.googleapis.com/google.iam.v3beta.OperationMetadata",
    "createTime": "2024-05-10T20:32:00.898809495Z",
    "target": "organizations/123456789012/locations/global/policyBindings/example-binding",
    "verb": "create",
    "requestedCancellation": false,
    "apiVersion": "v3beta"
  },
  "done": false
}

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