Guide de démarrage rapide : utiliser les méthodes IAM de l'API Resource Manager

Cette page explique comment utiliser les méthodes IAM de l'API Resource Manager dans le langage de programmation de votre choix.

Avant de commencer

Créer un projet Google Cloud

Pour ce guide de démarrage rapide, vous avez besoin d'un nouveau projet Google Cloud.

  1. Connectez-vous à votre compte Google.

    Si vous n'en possédez pas déjà un, vous devez en créer un.

  2. Dans Cloud Console, sur la page de sélection du projet, cliquez sur Créer pour commencer à créer un projet Cloud.

    Accéder à la page de sélection du projet

  3. Activez l'API Resource Manager.

    Activer l'API

  4. Configurer l'authentification :
    1. Dans Cloud Console, accédez à la page Créer une clé de compte de service.

      Accéder à la page Créer une clé de compte de service
    2. Dans la liste Compte de service, sélectionnez Nouveau compte de service.
    3. Dans le champ Nom du compte de service, saisissez un nom.
    4. Dans la liste Rôle, sélectionnez Projet > Propriétaire.

    5. Cliquez sur Créer. Un fichier JSON contenant votre clé est téléchargé sur votre ordinateur.
  5. Définissez la variable d'environnement GOOGLE_APPLICATION_CREDENTIALS pour qu'elle pointe vers le chemin du fichier JSON contenant la clé de votre compte de service. Cette variable ne s'applique qu'à la session de shell actuelle. Par conséquent, si vous ouvrez une nouvelle session, vous devez de nouveau la définir.

Installer la bibliothèque cliente

C#

Pour savoir comment configurer votre environnement de développement C#, consultez le guide de configuration d'un environnement de développement C#.

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

Java

Pour savoir comment configurer votre environnement de développement Java, consultez le guide de configuration d'un environnement de développement Java.

Si vous utilisez Maven, ajoutez les lignes suivantes à votre fichier pom.xml.
<dependency>
  <groupId>com.google.apis</groupId>
  <artifactId>google-api-services-iam</artifactId>
  <version>v1-rev20201029-1.30.10</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-rev20201027-1.30.10</version><!-- v1 required here, v2 is different - DO NOT UPDATE to v2 -->
</dependency>

Python

Pour savoir comment configurer votre environnement de développement Python, consultez le guide de configuration d'un environnement de développement Python.

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

Lire, modifier et rédiger une stratégie IAM

L'extrait de code de ce guide de démarrage rapide permet d'effectuer les opérations suivantes :

  • Initialisation du service Resource Manager, qui gère les projets Google Cloud
  • Lecture de la stratégie IAM de votre projet
  • Modification de la stratégie IAM en attribuant le rôle "Rédacteur de journal" (roles/logging.logWriter) à votre compte Google
  • Écriture de la stratégie IAM mise à jour
  • Affichage de tous les membres de votre projet disposant du rôle "Rédacteur de journal" (roles/logging.logWriter).
  • Révocation du rôle "Rédacteur de journal".

Avant d'exécuter l'extrait de code, remplacez les valeurs suivantes :

  • your-project : ID de votre projet.
  • your-member : adresse e-mail de votre compte Google, avec le préfixe user:. Exemple : user:tanya@example.com.

C#

Pour en savoir plus, consultez la documentation de référence de l'API Resource Manager en langage C#.


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

Pour en savoir plus, consultez la documentation de référence de l'API Resource Manager en langage Go.


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)
	}
}

Java

Pour en savoir plus, consultez la documentation de référence de l'API Resource Manager en langage Java.

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

Pour en savoir plus, consultez la documentation de référence de l'API Resource Manager en langage Python.

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)

Félicitations ! Vous avez utilisé les méthodes IAM de l'API Resource Manager pour modifier l'accès à un projet.

Comment ça s'est passé ?

Effectuer un nettoyage

  • Utilisez Cloud Console pour supprimer votre projet, si vous n'en avez plus besoin.

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