Viewing the grantable roles on resources

Console

To view grantable roles for a project, folder, or organization, do the following:

1. In the Google Cloud console, go to the IAM page.

   Go to the IAM page

2. Click Select a project at the top of the page.

3. Select the project, folder, or organization for which you want to view grantable roles.

4. Click person_add Grant access.

5. Click Select a role. This menu displays all the roles, including any custom roles, that you can grant on this resource.

To view grantable roles for other resource types, do the following:

1. In the Google Cloud console, go to the page listing the resource for which you want to view grantable roles.

   For example, to manage access to a Compute Engine instance, go to the VM instances page.

   Go to VM instances

2. Select the checkbox next to the resource for which you want to view grantable roles.

3. Ensure that the info panel is visible. If it is not visible, click Show info panel.

4. Click person_add Add principal.

5. Click Select a role. This menu displays all the roles, including any custom roles, that you can grant on this resource.

gcloud

Use the gcloud iam list-grantable-roles command to return a list of all roles that can be applied to a given resource.

gcloud iam list-grantable-roles full-resource-name

Depending on the desired resource, a large number of roles may be returned. To limit the results, you can specify a filter expression.

The output will look something like:

description: Full control of all Compute Engine resources.
name: roles/compute.admin
title: Compute Admin
---
description: Full control of Compute Engine instance resources.
name: roles/compute.instanceAdmin
title: Compute Instance Admin

# Additional results here...

REST

The roles.queryGrantableRoles method returns a list of all roles grantable on a resource.

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

• FULL_RESOURCE_NAME: A URI consisting of the service name and the path to the resource. For examples, see Full resource names.

HTTP method and URL:

POST https://iam.googleapis.com/v1/roles:queryGrantableRoles

Request JSON body:

{
  "fullResourceName": "FULL_RESOURCE_NAME"
}

To send your request, expand one of these options:

curl -X POST \
    -H "Authorization: Bearer $(gcloud auth print-access-token)" \
    -H "Content-Type: application/json; charset=utf-8" \
    -d @request.json \
    "https://iam.googleapis.com/v1/roles:queryGrantableRoles"

$cred = gcloud auth print-access-token
$headers = @{ "Authorization" = "Bearer $cred" }

Invoke-WebRequest `
    -Method POST `
    -Headers $headers `
    -ContentType: "application/json; charset=utf-8" `
    -InFile request.json `
    -Uri "https://iam.googleapis.com/v1/roles:queryGrantableRoles" | Select-Object -Expand Content

You should receive a JSON response similar to the following:

{
  "roles": [
    {
      "name": "roles/compute.admin",
      "title": "Compute Admin",
      "description": "Full control of all Compute Engine resources."
    },
    {
      "name": "roles/compute.instanceAdmin",
      "title": "Compute Instance Admin (beta)",
      "description": "Full control of Compute Engine instance resources."
    }
  ]
}

C++

To learn how to install and use the client library for IAM, see IAM client libraries. For more information, see the IAM C++ API reference documentation.

To authenticate to IAM, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

namespace iam = ::google::cloud::iam_admin_v1;
[](std::string const& resource) {
  iam::IAMClient client(iam::MakeIAMConnection());
  int count = 0;
  for (auto& role : client.QueryGrantableRoles(resource)) {
    if (!role) throw std::move(role).status();
    std::cout << "Role successfully retrieved: " << role->name() << "\n";
    ++count;
  }
  if (count == 0) {
    std::cout << "No grantable roles found in resource: " << resource << "\n";
  }
}

C#

To learn how to install and use the client library for IAM, see IAM client libraries. For more information, see the IAM C# API reference documentation.

To authenticate to IAM, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

using System;
using System.Collections.Generic;
using Google.Apis.Auth.OAuth2;
using Google.Apis.Iam.v1;
using Google.Apis.Iam.v1.Data;

public partial class CustomRoles
{
    public static IList<Role> ViewGrantableRoles(string fullResourceName)
    {
        var credential = GoogleCredential.GetApplicationDefault()
            .CreateScoped(IamService.Scope.CloudPlatform);
        var service = new IamService(new IamService.Initializer
        {
            HttpClientInitializer = credential
        });

        var request = new QueryGrantableRolesRequest
        {
            FullResourceName = fullResourceName
        };
        var response = service.Roles.QueryGrantableRoles(request).Execute();
        foreach (var role in response.Roles)
        {
            Console.WriteLine("Title: " + role.Title);
            Console.WriteLine("Name: " + role.Name);
            Console.WriteLine("Description: " + role.Description);
            Console.WriteLine();
        }
        return response.Roles;
    }
}

Go

To learn how to install and use the client library for IAM, see IAM client libraries. For more information, see the IAM Go API reference documentation.

To authenticate to IAM, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

import (
	"context"
	"fmt"
	"io"

	iam "google.golang.org/api/iam/v1"
)

// viewGrantableRoles lists roles grantable on a resource.
func viewGrantableRoles(w io.Writer, fullResourceName string) ([]*iam.Role, error) {
	ctx := context.Background()
	service, err := iam.NewService(ctx)
	if err != nil {
		return nil, fmt.Errorf("iam.NewService: %w", err)
	}

	request := &iam.QueryGrantableRolesRequest{
		FullResourceName: fullResourceName,
	}
	response, err := service.Roles.QueryGrantableRoles(request).Do()
	if err != nil {
		return nil, fmt.Errorf("Roles.QueryGrantableRoles: %w", err)
	}
	for _, role := range response.Roles {
		fmt.Fprintf(w, "Found grantable role: %v\n", role.Name)
	}
	return response.Roles, err
}

Java

To learn how to install and use the client library for IAM, see IAM client libraries. For more information, see the IAM Java API reference documentation.

To authenticate to IAM, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

QueryGrantableRolesRequest request = new QueryGrantableRolesRequest();
request.setFullResourceName(fullResourceName);

QueryGrantableRolesResponse response = service.roles().queryGrantableRoles(request).execute();

for (Role role : response.getRoles()) {
  System.out.println("Title: " + role.getTitle());
  System.out.println("Name: " + role.getName());
  System.out.println("Description: " + role.getDescription());
  System.out.println();
}

Python

To learn how to install and use the client library for IAM, see IAM client libraries. For more information, see the IAM Python API reference documentation.

To authenticate to IAM, set up Application Default Credentials. For more information, see Set up authentication for a local development environment.

def view_grantable_roles(full_resource_name: str) -> None:
    roles = (
        service.roles()
        .queryGrantableRoles(body={"fullResourceName": full_resource_name})
        .execute()
    )

    for role in roles["roles"]:
        if "title" in role:
            print("Title: " + role["title"])
        print("Name: " + role["name"])
        if "description" in role:
            print("Description: " + role["description"])
        print(" ")