Create service accounts

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This page explains how to create service accounts using the Identity and Access Management (IAM) API, the Google Cloud console, and the gcloud command- line tool.

By default, each project can have up to 100 service accounts that control access to your resources. You can request a quota increase if necessary. Learn more about quotas and limits.

Before you begin

Required roles

To get the permissions that you need to create service accounts, ask your administrator to grant you the Create Service Accounts (roles/iam.serviceAccountCreator) IAM role on the project. 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.

To learn more about this role, see Service Accounts roles.

IAM basic roles also contain permissions to manage service accounts. You should not grant basic roles in a production environment, but you can grant them in a development or test environment.

Create a service account

When you create a service account, you must provide an alphanumeric ID (SA_NAME in the samples below), such as my-service-account. The ID must be between 6 and 30 characters, and can contain lowercase alphanumeric characters and dashes. After you create a service account, you cannot change its name.

The service account's name appears in the email address that is provisioned during creation, in the format SA_NAME@PROJECT_ID.iam.gserviceaccount.com.

Each service account also has a permanent, unique numeric ID, which is generated automatically.

You also provide the following information when you create a service account:

  • SA_DESCRIPTION is an optional description for the service account.
  • SA_DISPLAY_NAME is a friendly name for the service account.
  • PROJECT_ID is the ID of your Google Cloud project.

After you create a service account, you might need to wait for 60 seconds or more before you use the service account. This behavior occurs because read operations are eventually consistent; it can take time for the new service account to become visible. If you try to read or use a service account immediately after you create it, and you receive an error, you can retry the request with exponential backoff.

Console

  1. In the Google Cloud console, go to the Create service account page.

    Go to Create service account
    The remaining steps will appear automatically in the Google Cloud console.

  2. Select a Cloud project.
  3. Enter a service account name to display in the Google Cloud console.

    The Google Cloud console generates a service account ID based on this name. Edit the ID if necessary. You cannot change the ID later.

  4. Optional: Enter a description of the service account.
  5. If you don't want to set access controls now, click Done to finish creating the service account. To set access controls now, click Create and continue and continue to the next step.
  6. Optional: Choose one or more IAM roles to grant to the service account on the project.
  7. When you are done adding roles, click Continue.
  8. Optional: In the Service account users role field, add members that can impersonate the service account.
  9. Optional: In the Service account admins role field, add members that can manage the service account.
  10. Click Done to finish creating the service account.

gcloud

  1. To create the service account, run the gcloud iam service-accounts create command:

    gcloud iam service-accounts create SA_NAME \
    --description="DESCRIPTION" \
    --display-name="DISPLAY_NAME"

    Replace the following values:

    • SA_NAME: the name of the service account
    • DESCRIPTION: an optional description of the service account
    • DISPLAY_NAME: a service account name to display in the Google Cloud console

  2. Optional: To grant your service account an IAM role on your project, run the gcloud projects add-iam-policy-binding command:

    gcloud projects add-iam-policy-binding PROJECT_ID \
    --member="serviceAccount:SA_NAME@PROJECT_ID.iam.gserviceaccount.com" \
    --role="ROLE_NAME"

    Replace the following values:

    • PROJECT_ID: the project ID
    • SA_NAME: the name of the service account
    • ROLE_NAME: a role name, such as roles/compute.osLogin

  3. Optional: To allow users to impersonate the service account, run the gcloud iam service-accounts add-iam-policy-binding command to grant a user the Service Account User role (roles/iam.serviceAccountUser) on the service account:

    gcloud iam service-accounts add-iam-policy-binding \
    SA_NAME@PROJECT_ID.iam.gserviceaccount.com \
    --member="user:USER_EMAIL" \
    --role="roles/iam.serviceAccountUser"

    Replace the following values:

    • PROJECT_ID: the project ID
    • SA_NAME: the name of the service account
    • USER_EMAIL: the email address for the user

REST

The serviceAccounts.create method creates a service account.

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

  • PROJECT_ID: Your Google Cloud project ID. Project IDs are alphanumeric strings, like my-project.
  • SA_NAME: The alphanumeric ID of your service account. This name must be between 6 and 30 characters, and can contain lowercase alphanumeric characters and dashes.
  • SA_DESCRIPTION: Optional. A description for the service account.
  • SA_DISPLAY_NAME: A human-readable name for the service account.

HTTP method and URL: 

POST https://iam.googleapis.com/v1/projects/PROJECT_ID/serviceAccounts

Request JSON body: 

{
  "accountId": "SA_NAME",
  "serviceAccount": {
    "description": "SA_DESCRIPTION",
    "displayName": "SA_DISPLAY_NAME"
  }
}

To send your request, expand one of these options:

You should receive a JSON response similar to the following:

{
  "name": "projects/my-project/serviceAccounts/my-service-account@my-project.iam.gserviceaccount.com",
  "projectId": "my-project",
  "uniqueId": "123456789012345678901",
  "email": "my-service-account@my-project.iam.gserviceaccount.com",
  "displayName": "My service account",
  "etag": "BwUp3rVlzes=",
  "description": "A service account for running jobs in my project",
  "oauth2ClientId": "987654321098765432109"
}

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. 

namespace iam = ::google::cloud::iam;
[](std::string const& project_id, std::string const& account_id,
   std::string const& display_name, std::string const& description) {
  iam::IAMClient client(iam::MakeIAMConnection());
  google::iam::admin::v1::ServiceAccount service_account;
  service_account.set_display_name(display_name);
  service_account.set_description(description);
  auto response = client.CreateServiceAccount("projects/" + project_id,
                                              account_id, service_account);
  if (!response) throw std::move(response).status();
  std::cout << "ServiceAccount successfully created: "
            << response->DebugString() << "\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. 


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

public partial class ServiceAccounts
{
    public static ServiceAccount CreateServiceAccount(string projectId,
        string name, string displayName)
    {
        var credential = GoogleCredential.GetApplicationDefault()
            .CreateScoped(IamService.Scope.CloudPlatform);
        var service = new IamService(new IamService.Initializer
        {
            HttpClientInitializer = credential
        });

        var request = new CreateServiceAccountRequest
        {
            AccountId = name,
            ServiceAccount = new ServiceAccount
            {
                DisplayName = displayName
            }
        };
        var serviceAccount = service.Projects.ServiceAccounts.Create(
            request, "projects/" + projectId).Execute();
        Console.WriteLine("Created service account: " + serviceAccount.Email);
        return serviceAccount;
    }
}

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. 

import (
	"context"
	"fmt"
	"io"

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

// createServiceAccount creates a service account.
func createServiceAccount(w io.Writer, projectID, name, displayName string) (*iam.ServiceAccount, error) {
	ctx := context.Background()
	service, err := iam.NewService(ctx)
	if err != nil {
		return nil, fmt.Errorf("iam.NewService: %v", err)
	}

	request := &iam.CreateServiceAccountRequest{
		AccountId: name,
		ServiceAccount: &iam.ServiceAccount{
			DisplayName: displayName,
		},
	}
	account, err := service.Projects.ServiceAccounts.Create("projects/"+projectID, request).Do()
	if err != nil {
		return nil, fmt.Errorf("Projects.ServiceAccounts.Create: %v", err)
	}
	fmt.Fprintf(w, "Created service account: %v", account)
	return account, nil
}

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. 

import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.services.iam.v1.Iam;
import com.google.api.services.iam.v1.IamScopes;
import com.google.api.services.iam.v1.model.CreateServiceAccountRequest;
import com.google.api.services.iam.v1.model.ServiceAccount;
import com.google.auth.http.HttpCredentialsAdapter;
import com.google.auth.oauth2.GoogleCredentials;
import java.io.IOException;
import java.security.GeneralSecurityException;
import java.util.Collections;

public class CreateServiceAccount {

  // Creates a service account.
  public static void createServiceAccount(String projectId, String serviceAccountName) {
    // String projectId = "my-project-id";
    // String serviceAccountName = "my-service-account-name";

    Iam service = null;
    try {
      service = initService();
    } catch (IOException | GeneralSecurityException e) {
      System.out.println("Unable to initialize service: \n" + e.toString());
      return;
    }

    try {
      ServiceAccount serviceAccount = new ServiceAccount();
      serviceAccount.setDisplayName("your-display-name");
      CreateServiceAccountRequest request = new CreateServiceAccountRequest();
      request.setAccountId(serviceAccountName);
      request.setServiceAccount(serviceAccount);

      serviceAccount =
          service.projects().serviceAccounts().create("projects/" + projectId, request).execute();

      System.out.println("Created service account: " + serviceAccount.getEmail());
    } catch (IOException e) {
      System.out.println("Unable to create service account: \n" + e.toString());
    }
  }

  private static Iam initService() throws GeneralSecurityException, IOException {
    // Use the Application Default Credentials strategy for authentication. For more info, see:
    // https://cloud.google.com/docs/authentication/production#finding_credentials_automatically
    GoogleCredentials credential =
        GoogleCredentials.getApplicationDefault()
            .createScoped(Collections.singleton(IamScopes.CLOUD_PLATFORM));
    // Initialize the IAM service, which can be used to send requests to the IAM API.
    Iam service =
        new Iam.Builder(
                GoogleNetHttpTransport.newTrustedTransport(),
                JacksonFactory.getDefaultInstance(),
                new HttpCredentialsAdapter(credential))
            .setApplicationName("service-accounts")
            .build();
    return service;
  }
}

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. 

import os

from google.oauth2 import service_account
import googleapiclient.discovery

def create_service_account(project_id, name, display_name):
    """Creates a service account."""

    credentials = service_account.Credentials.from_service_account_file(
        filename=os.environ['GOOGLE_APPLICATION_CREDENTIALS'],
        scopes=['https://www.googleapis.com/auth/cloud-platform'])

    service = googleapiclient.discovery.build(
        'iam', 'v1', credentials=credentials)

    my_service_account = service.projects().serviceAccounts().create(
        name='projects/' + project_id,
        body={
            'accountId': name,
            'serviceAccount': {
                'displayName': display_name
            }
        }).execute()

    print('Created service account: ' + my_service_account['email'])
    return my_service_account

After you create a service account, grant one or more roles to the service account so that it can act on your behalf.

Also, if the service account needs to access resources in other projects, you usually must enable the APIs for those resources in the project where you created the service account.

What's next

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