빠른 시작: Resource Manager API의 IAM 메서드 사용

이 페이지에서는 선호하는 프로그래밍 언어로 Resource Manager API의 IAM 메서드를 시작하는 방법을 보여줍니다.

시작하기 전에

Google Cloud 프로젝트 만들기

이 빠른 시작을 진행하려면 새 Google Cloud 프로젝트가 필요합니다.

  1. Google 계정으로 로그인합니다.

    아직 계정이 없으면 새 계정을 등록하세요.

  2. Cloud Console의 프로젝트 선택기 페이지에서 만들기를 클릭하여 새 Cloud 프로젝트를 만듭니다.

    프로젝트 선택기 페이지로 이동

  3. Resource Manager API를 사용 설정합니다.

    API 사용 설정

  4. 인증 설정:
    1. Cloud Console에서 서비스 계정 키 만들기 페이지로 이동합니다.

      서비스 계정 키 만들기 페이지로 이동
    2. 서비스 계정 목록에서 새 서비스 계정을 선택합니다.
    3. 서비스 계정 이름 필드에 이름을 입력합니다.
    4. 역할 목록에서 프로젝트 > 소유자를 선택합니다.

      참고: 역할 필드가 리소스에 액세스할 수 있도록 서비스 계정을 승인합니다. 나중에 Cloud Console을 사용하여 이 필드를 보고 변경할 수 있습니다. 프로덕션 애플리케이션을 개발하는 경우 프로젝트 > 소유자보다 세부적인 권한을 지정합니다. 자세한 내용은 서비스 계정에 역할 부여를 참조하세요.
    5. 만들기를 클릭합니다. 키가 포함된 JSON 파일이 컴퓨터에 다운로드됩니다.
  5. GOOGLE_APPLICATION_CREDENTIALS 환경 변수를 서비스 계정 키가 포함된 JSON 파일의 경로로 설정합니다. 이 변수는 현재 셸 세션에만 적용되므로, 새 세션을 열 경우, 변수를 다시 설정합니다.

클라이언트 라이브러리 설치

C#

C# 개발 환경 설정에 관한 자세한 내용은 C# 개발 환경 설정 가이드를 참조하세요.

install-package Google.Apis.Iam.v1
install-package Google.Apis.CloudResourceManager.v1

Go

go get -u golang.org/x/oauth2/google
go get -u google.golang.org/api/cloudresourcemanager/v1

자바

자바 개발 환경 설정에 관한 자세한 내용은 자바 개발 환경 설정 가이드를 참조하세요.

Maven을 사용하는 경우 pom.xml 파일에 다음을 추가합니다.
<dependency>
  <groupId>com.google.apis</groupId>
  <artifactId>google-api-services-iam</artifactId>
  <version>v1-rev20200910-1.30.10</version>
</dependency>
<dependency>
  <groupId>com.google.auth</groupId>
  <artifactId>google-auth-library-oauth2-http</artifactId>
  <version>0.21.1</version>
</dependency>
<dependency>
  <groupId>com.google.apis</groupId>
  <artifactId>google-api-services-cloudresourcemanager</artifactId>
  <version>v1-rev20200921-1.30.10</version><!-- v1 required here, v2 is different - DO NOT UPDATE to v2 -->
</dependency>

Python

Python 개발 환경 설정에 관한 자세한 내용은 Python 개발 환경 설정 가이드를 참조하세요.

pip install --upgrade google-api-python-client google-auth google-auth-httplib2

IAM 정책 읽기, 수정, 쓰기

이 빠른 시작의 코드 스니펫은 다음 작업을 수행합니다.

  • Google Cloud 프로젝트를 관리하는 Resource Manager 서비스를 초기화합니다.
  • 프로젝트의 IAM 정책을 읽습니다.
  • Google 계정에 로그 작성자 역할(roles/logging.logWriter)을 부여하여 IAM 정책을 수정합니다.
  • 업데이트된 IAM 정책을 작성합니다.
  • 로그 작성자 역할(roles/logging.logWriter)이 있는 프로젝트의 모든 구성원을 출력합니다.
  • 로그 작성자 역할을 취소합니다.

코드 스니펫을 실행하기 전에 다음 값을 바꿉니다.

  • your-project: 프로젝트의 ID입니다.
  • your-member: Google 계정의 이메일 주소(프리픽스 user:)입니다. 예를 들면 user:tanya@example.com입니다.

C#

자세한 내용은 Resource Manager C# API 참조 문서를 확인하세요.


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

public class QuickStart
{
    public static void Main(string[] args)
    {
        // TODO: Replace with your project ID
        var projectId = "your-project";
        // TODO: Replace with the ID of your member in the form "user:member@example.com"
        var member = "your-member";
        // Role to be granted
        var role = "roles/logging.logWriter";

        // Initialize service
        CloudResourceManagerService crmService = InitializeService();

        // Grant your member the "Log Writer" role for your project
        AddBinding(crmService, projectId, member, role);

        // Get the project's policy and print all members with the the "Log Writer" role
        var policy = GetPolicy(crmService, projectId);
        var binding = policy.Bindings.FirstOrDefault(x => x.Role == role);
        Console.WriteLine("Role: " + binding.Role);
        Console.Write("Members: ");
        foreach (var m in binding.Members)
        {
            Console.Write("[" + m + "] ");
        }
        Console.WriteLine();

        // Remove member from the "Log Writer" role
        RemoveMember(crmService, projectId, member, role);
    }

    public static CloudResourceManagerService InitializeService()
    {
        // Get credentials
        var credential = GoogleCredential.GetApplicationDefault()
            .CreateScoped(IamService.Scope.CloudPlatform);

        // Create the Cloud Resource Manager service object
        CloudResourceManagerService crmService = new CloudResourceManagerService(
            new CloudResourceManagerService.Initializer
            {
                HttpClientInitializer = credential
            });

        return crmService;
    }

    public static Policy GetPolicy(CloudResourceManagerService crmService, String projectId)
    {
        // Get the project's policy by calling the
        // Cloud Resource Manager Projects API
        var policy = crmService.Projects.GetIamPolicy(
            new GetIamPolicyRequest(),
            projectId).Execute();
        return policy;
    }

    public static void SetPolicy(CloudResourceManagerService crmService, String projectId, Policy policy)
    {
        // Set the project's policy by calling the
        // Cloud Resource Manager Projects API
        crmService.Projects.SetIamPolicy(
           new SetIamPolicyRequest
           {
               Policy = policy
           }, projectId).Execute();
    }

    public static void AddBinding(
        CloudResourceManagerService crmService,
        string projectId,
        string member,
        string role)
    {
        // Get the project's policy
        var policy = GetPolicy(crmService, projectId);

        // Find binding in policy
        var binding = policy.Bindings.FirstOrDefault(x => x.Role == role);

        // If binding already exists, add member to binding
        if (binding != null)
        {
            binding.Members.Add(member);
        }
        // If binding does not exist, add binding to policy
        else
        {
            binding = new Binding
            {
                Role = role,
                Members = new List<string> { member }
            };
            policy.Bindings.Add(binding);
        }

        // Set the updated policy
        SetPolicy(crmService, projectId, policy);
    }

    public static void RemoveMember(
        CloudResourceManagerService crmService,
        string projectId,
        string member,
        string role)
    {
        // Get the project's policy
        var policy = GetPolicy(crmService, projectId);

        // Remove the member from the role
        var binding = policy.Bindings.FirstOrDefault(x => x.Role == role);
        if (binding == null)
        {
            Console.WriteLine("Role does not exist in policy.");
        }
        else
        {
            if (binding.Members.Contains(member))
            {
                binding.Members.Remove(member);
            }
            else
            {
                Console.WriteLine("The member has not been granted this role.");
            }

            if (binding.Members.Count == 0)
            {
                policy.Bindings.Remove(binding);
            }
        }

        // Set the updated policy
        SetPolicy(crmService, projectId, policy);
    }
}

Go

자세한 내용은 Resource Manager Go API 참조 문서를 확인하세요.


package main

import (
	"context"
	"flag"
	"fmt"
	"log"
	"strings"
	"time"

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

func main() {
	// TODO: Add your project ID
	projectID := flag.String("project_id", "", "Cloud Project ID")
	// TODO: Add the ID of your member in the form "user:member@example.com"
	member := flag.String("member_id", "", "Your member ID")
	flag.Parse()

	// The role to be granted
	var role string = "roles/logging.logWriter"

	// Initializes the Cloud Resource Manager service
	ctx := context.Background()
	crmService, err := cloudresourcemanager.NewService(ctx)
	if err != nil {
		log.Fatalf("cloudresourcemanager.NewService: %v", err)
	}

	// Grants your member the "Log writer" role for your project
	addBinding(crmService, *projectID, *member, role)

	// Gets the project's policy and prints all members with the "Log Writer" role
	policy := getPolicy(crmService, *projectID)
	// Find the policy binding for role. Only one binding can have the role.
	var binding *cloudresourcemanager.Binding
	for _, b := range policy.Bindings {
		if b.Role == role {
			binding = b
			break
		}
	}
	fmt.Println("Role: ", binding.Role)
	fmt.Print("Members: ", strings.Join(binding.Members, ", "))

	// Removes member from the "Log writer" role
	removeMember(crmService, *projectID, *member, role)

}

// addBinding adds the member to the project's IAM policy
func addBinding(crmService *cloudresourcemanager.Service, projectID, member, role string) {

	policy := getPolicy(crmService, projectID)

	// Find the policy binding for role. Only one binding can have the role.
	var binding *cloudresourcemanager.Binding
	for _, b := range policy.Bindings {
		if b.Role == role {
			binding = b
			break
		}
	}

	if binding != nil {
		// If the binding exists, adds the member to the binding
		binding.Members = append(binding.Members, member)
	} else {
		// If the binding does not exist, adds a new binding to the policy
		binding = &cloudresourcemanager.Binding{
			Role:    role,
			Members: []string{member},
		}
		policy.Bindings = append(policy.Bindings, binding)
	}

	setPolicy(crmService, projectID, policy)

}

// removeMember removes the member from the project's IAM policy
func removeMember(crmService *cloudresourcemanager.Service, projectID, member, role string) {

	policy := getPolicy(crmService, projectID)

	// Find the policy binding for role. Only one binding can have the role.
	var binding *cloudresourcemanager.Binding
	var bindingIndex int
	for i, b := range policy.Bindings {
		if b.Role == role {
			binding = b
			bindingIndex = i
			break
		}
	}

	// Order doesn't matter for bindings or members, so to remove, move the last item
	// into the removed spot and shrink the slice.
	if len(binding.Members) == 1 {
		// If the member is the only member in the binding, removes the binding
		last := len(policy.Bindings) - 1
		policy.Bindings[bindingIndex] = policy.Bindings[last]
		policy.Bindings = policy.Bindings[:last]
	} else {
		// If there is more than one member in the binding, removes the member
		var memberIndex int
		for i, mm := range binding.Members {
			if mm == member {
				memberIndex = i
			}
		}
		last := len(policy.Bindings[bindingIndex].Members) - 1
		binding.Members[memberIndex] = binding.Members[last]
		binding.Members = binding.Members[:last]
	}

	setPolicy(crmService, projectID, policy)

}

// getPolicy gets the project's IAM policy
func getPolicy(crmService *cloudresourcemanager.Service, projectID string) *cloudresourcemanager.Policy {

	ctx := context.Background()

	ctx, cancel := context.WithTimeout(ctx, time.Second*10)
	defer cancel()
	request := new(cloudresourcemanager.GetIamPolicyRequest)
	policy, err := crmService.Projects.GetIamPolicy(projectID, request).Do()
	if err != nil {
		log.Fatalf("Projects.GetIamPolicy: %v", err)
	}

	return policy
}

// setPolicy sets the project's IAM policy
func setPolicy(crmService *cloudresourcemanager.Service, projectID string, policy *cloudresourcemanager.Policy) {

	ctx := context.Background()

	ctx, cancel := context.WithTimeout(ctx, time.Second*10)
	defer cancel()
	request := new(cloudresourcemanager.SetIamPolicyRequest)
	request.Policy = policy
	policy, err := crmService.Projects.SetIamPolicy(projectID, request).Do()
	if err != nil {
		log.Fatalf("Projects.SetIamPolicy: %v", err)
	}
}

자바

자세한 내용은 Resource Manager 자바 API 참조 문서를 확인하세요.

import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.services.cloudresourcemanager.CloudResourceManager;
import com.google.api.services.cloudresourcemanager.model.Binding;
import com.google.api.services.cloudresourcemanager.model.GetIamPolicyRequest;
import com.google.api.services.cloudresourcemanager.model.Policy;
import com.google.api.services.cloudresourcemanager.model.SetIamPolicyRequest;
import com.google.api.services.iam.v1.IamScopes;
import com.google.auth.http.HttpCredentialsAdapter;
import com.google.auth.oauth2.GoogleCredentials;
import java.io.IOException;
import java.security.GeneralSecurityException;
import java.util.Collections;
import java.util.List;

public class Quickstart {

  public static void main(String[] args) {
    // TODO: Replace with your project ID.
    String projectId = "your-project";
    // TODO: Replace with the ID of your member in the form "user:member@example.com"
    String member = "your-member";
    // The role to be granted.
    String role = "roles/logging.logWriter";

    // Initializes the Cloud Resource Manager service.
    CloudResourceManager crmService = null;
    try {
      crmService = initializeService();
    } catch (IOException | GeneralSecurityException e) {
      System.out.println("Unable to initialize service: \n" + e.getMessage() + e.getStackTrace());
    }

    // Grants your member the "Log writer" role for your project.
    addBinding(crmService, projectId, member, role);

    // Get the project's policy and print all members with the "Log Writer" role
    Policy policy = getPolicy(crmService, projectId);
    Binding binding = null;
    List<Binding> bindings = policy.getBindings();
    for (Binding b : bindings) {
      if (b.getRole().equals(role)) {
        binding = b;
        break;
      }
    }
    System.out.println("Role: " + binding.getRole());
    System.out.print("Members: ");
    for (String m : binding.getMembers()) {
      System.out.print("[" + m + "] ");
    }
    System.out.println();

    // Removes member from the "Log writer" role.
    removeMember(crmService, projectId, member, role);
  }

  public static CloudResourceManager initializeService()
      throws IOException, GeneralSecurityException {
    // 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));

    // Creates the Cloud Resource Manager service object.
    CloudResourceManager service =
        new CloudResourceManager.Builder(
                GoogleNetHttpTransport.newTrustedTransport(),
                JacksonFactory.getDefaultInstance(),
                new HttpCredentialsAdapter(credential))
            .setApplicationName("iam-quickstart")
            .build();
    return service;
  }

  public static void addBinding(
      CloudResourceManager crmService, String projectId, String member, String role) {

    // Gets the project's policy.
    Policy policy = getPolicy(crmService, projectId);

    // Finds binding in policy, if it exists
    Binding binding = null;
    for (Binding b : policy.getBindings()) {
      if (b.getRole().equals(role)) {
        binding = b;
        break;
      }
    }

    if (binding != null) {
      // If binding already exists, adds member to binding.
      binding.getMembers().add(member);
    } else {
      // If binding does not exist, adds binding to policy.
      binding = new Binding();
      binding.setRole(role);
      binding.setMembers(Collections.singletonList(member));
      policy.getBindings().add(binding);
    }

    // Sets the updated policy
    setPolicy(crmService, projectId, policy);
  }

  public static void removeMember(
      CloudResourceManager crmService, String projectId, String member, String role) {
    // Gets the project's policy.
    Policy policy = getPolicy(crmService, projectId);

    // Removes the member from the role.
    Binding binding = null;
    for (Binding b : policy.getBindings()) {
      if (b.getRole().equals(role)) {
        binding = b;
        break;
      }
    }
    if (binding.getMembers().contains(member)) {
      binding.getMembers().remove(member);
      if (binding.getMembers().isEmpty()) {
        policy.getBindings().remove(binding);
      }
    }

    // Sets the updated policy.
    setPolicy(crmService, projectId, policy);
  }

  public static Policy getPolicy(CloudResourceManager crmService, String projectId) {
    // Gets the project's policy by calling the
    // Cloud Resource Manager Projects API.
    Policy policy = null;
    try {
      GetIamPolicyRequest request = new GetIamPolicyRequest();
      policy = crmService.projects().getIamPolicy(projectId, request).execute();
    } catch (IOException e) {
      System.out.println("Unable to get policy: \n" + e.getMessage() + e.getStackTrace());
    }
    return policy;
  }

  private static void setPolicy(CloudResourceManager crmService, String projectId, Policy policy) {
    // Sets the project's policy by calling the
    // Cloud Resource Manager Projects API.
    try {
      SetIamPolicyRequest request = new SetIamPolicyRequest();
      request.setPolicy(policy);
      crmService.projects().setIamPolicy(projectId, request).execute();
    } catch (IOException e) {
      System.out.println("Unable to set policy: \n" + e.getMessage() + e.getStackTrace());
    }
  }
}

Python

자세한 내용은 Resource Manager Python API 참조 문서를 확인하세요.

import os

from google.oauth2 import service_account
import googleapiclient.discovery

def quickstart(project_id, member):
    """Gets a policy, adds a member, prints their permissions, and removes the member."""

    # Role to be granted.
    role = "roles/logging.logWriter"

    # Initializes service.
    crm_service = initialize_service()

    # Grants your member the 'Log Writer' role for the project.
    modify_policy_add_role(crm_service, project_id, role, member)

    # Gets the project's policy and prints all members with the 'Log Writer' role.
    policy = get_policy(crm_service, project_id)
    binding = next(b for b in policy["bindings"] if b["role"] == role)
    print(f'Role: {(binding["role"])}')
    print("Members: ")
    for m in binding["members"]:
        print(f'[{m}]')

    # Removes the member from the 'Log Writer' role.
    modify_policy_remove_member(crm_service, project_id, role, member)

def initialize_service():
    """Initializes a Cloud Resource Manager service."""

    credentials = service_account.Credentials.from_service_account_file(
        filename=os.environ["GOOGLE_APPLICATION_CREDENTIALS"],
        scopes=["https://www.googleapis.com/auth/cloud-platform"],
    )
    crm_service = googleapiclient.discovery.build(
        "cloudresourcemanager", "v1", credentials=credentials
    )
    return crm_service

def modify_policy_add_role(crm_service, project_id, role, member):
    """Adds a new role binding to a policy."""

    policy = get_policy(crm_service, project_id)

    binding = None
    for b in policy["bindings"]:
        if b["role"] == role:
            binding = b
            break
    if binding is not None:
        binding["members"].append(member)
    else:
        binding = {"role": role, "members": [member]}
        policy["bindings"].append(binding)

    set_policy(crm_service, project_id, policy)

def modify_policy_remove_member(crm_service, project_id, role, member):
    """Removes a  member from a role binding."""

    policy = get_policy(crm_service, project_id)

    binding = next(b for b in policy["bindings"] if b["role"] == role)
    if "members" in binding and member in binding["members"]:
        binding["members"].remove(member)

    set_policy(crm_service, project_id, policy)

def get_policy(crm_service, project_id, version=3):
    """Gets IAM policy for a project."""

    policy = (
        crm_service.projects()
        .getIamPolicy(
            resource=project_id,
            body={"options": {"requestedPolicyVersion": version}},
        )
        .execute()
    )
    return policy

def set_policy(crm_service, project_id, policy):
    """Sets IAM policy for a project."""

    policy = (
        crm_service.projects()
        .setIamPolicy(resource=project_id, body={"policy": policy})
        .execute()
    )
    return policy

if __name__ == '__main__':

    # TODO: replace with your project ID
    project_id = "your-project-id"
    # TODO: Replace with the ID of your member in the form 'user:member@example.com'.
    member = "your-member"
    quickstart(project_id, member)

수고하셨습니다. Resource Manager API의 IAM 메서드를 사용하여 프로젝트의 액세스 권한을 수정했습니다.

어땠나요?

삭제

  • 불필요한 프로젝트가 있는 경우 Cloud Console을 사용하여 삭제할 수 있습니다.

다음 단계