Utiliser les bibliothèques clientes

Ce document explique comment utiliser les bibliothèques clientes Cloud pour Compute Engine. Il décrit comment répertorier, créer et supprimer des instances de machines virtuelles (VM). Il explique également comment vérifier l'état d'une opération de longue durée. Vous pouvez exécuter les exemples de code sur votre ordinateur local ou sur une instance de VM, à condition d'avoir correctement autorisé l'exemple.

Une liste complète des bibliothèques clientes disponibles, notamment les autres bibliothèques clientes et les bibliothèques Open Source tierces, est disponible sur la page Bibliothèques clientes Compute Engine.

Coûts

Dans ce document, vous utilisez les composants facturables suivants de Google Cloud :

Compute Engine

Obtenez une estimation des coûts en fonction de votre utilisation prévue à l'aide du simulateur de coût. Les nouveaux utilisateurs de Google Cloud peuvent bénéficier d'un essai gratuit.

Avant de commencer

Avant de commencer, suivez les étapes d'installation et de configuration des bibliothèques clientes Compute Engine pour la bibliothèque cliente que vous souhaitez utiliser.

Dans les exemples du présent document, vous devez fournir des informations sur la VM que vous souhaitez créer (son emplacement, son type de machine et son image source). Pour en savoir plus sur ces valeurs, consultez les documents suivants :

Créer une instance

L'exemple suivant définit une instance qui utilise un nom, un type de machine, un réseau, une image source et un disque spécifiques. Ensuite, il crée (insère) l'instance dans un projet et une zone que vous indiquez. Dans cet exemple, l'instance se connecte au réseau default, qui est créé automatiquement pour chaque projet. Vous recevez un message lorsque l'API crée l'instance.

Lorsque vous créez une instance de machine virtuelle (VM), vous devez également associer un disque de démarrage à la VM. Le disque de démarrage contient tous les fichiers nécessaires au démarrage d'une VM, y compris une image d'OS publique ou personnalisée.

C#


using Google.Cloud.Compute.V1;
using System.Threading.Tasks;

public class CreateInstanceAsyncSample
{
    public async Task CreateInstanceAsync(
        // TODO(developer): Set your own default values for these parameters or pass different values when calling this method.
        string projectId = "your-project-id",
        string zone = "us-central1-a",
        string machineName = "test-machine",
        string machineType = "n1-standard-1",
        string diskImage = "projects/debian-cloud/global/images/family/debian-12",
        long diskSizeGb = 10,
        string networkName = "default")
    {
        Instance instance = new Instance
        {
            Name = machineName,
            // See https://cloud.google.com/compute/docs/machine-types for more information on machine types.
            MachineType = $"zones/{zone}/machineTypes/{machineType}",
            // Instance creation requires at least one persistent disk.
            Disks =
            {
                new AttachedDisk
                {
                    AutoDelete = true,
                    Boot = true,
                    Type = ComputeEnumConstants.AttachedDisk.Type.Persistent,
                    InitializeParams = new AttachedDiskInitializeParams 
                    {
                        // See https://cloud.google.com/compute/docs/images for more information on available images.
                        SourceImage = diskImage,
                        DiskSizeGb = diskSizeGb
                    }
                }
            },
            NetworkInterfaces = { new NetworkInterface { Name = networkName } }
        };

        // Initialize client that will be used to send requests. This client only needs to be created
        // once, and can be reused for multiple requests.
        InstancesClient client = await InstancesClient.CreateAsync();

        // Insert the instance in the specified project and zone.
        var instanceCreation = await client.InsertAsync(projectId, zone, instance);

        // Wait for the operation to complete using client-side polling.
        // The server-side operation is not affected by polling,
        // and might finish successfully even if polling times out.
        await instanceCreation.PollUntilCompletedAsync();
    }
}

Go

import (
	"context"
	"fmt"
	"io"

	compute "cloud.google.com/go/compute/apiv1"
	computepb "cloud.google.com/go/compute/apiv1/computepb"
	"google.golang.org/protobuf/proto"
)

// createInstance sends an instance creation request to the Compute Engine API and waits for it to complete.
func createInstance(w io.Writer, projectID, zone, instanceName, machineType, sourceImage, networkName string) error {
	// projectID := "your_project_id"
	// zone := "europe-central2-b"
	// instanceName := "your_instance_name"
	// machineType := "n1-standard-1"
	// sourceImage := "projects/debian-cloud/global/images/family/debian-12"
	// networkName := "global/networks/default"

	ctx := context.Background()
	instancesClient, err := compute.NewInstancesRESTClient(ctx)
	if err != nil {
		return fmt.Errorf("NewInstancesRESTClient: %w", err)
	}
	defer instancesClient.Close()

	req := &computepb.InsertInstanceRequest{
		Project: projectID,
		Zone:    zone,
		InstanceResource: &computepb.Instance{
			Name: proto.String(instanceName),
			Disks: []*computepb.AttachedDisk{
				{
					InitializeParams: &computepb.AttachedDiskInitializeParams{
						DiskSizeGb:  proto.Int64(10),
						SourceImage: proto.String(sourceImage),
					},
					AutoDelete: proto.Bool(true),
					Boot:       proto.Bool(true),
					Type:       proto.String(computepb.AttachedDisk_PERSISTENT.String()),
				},
			},
			MachineType: proto.String(fmt.Sprintf("zones/%s/machineTypes/%s", zone, machineType)),
			NetworkInterfaces: []*computepb.NetworkInterface{
				{
					Name: proto.String(networkName),
				},
			},
		},
	}

	op, err := instancesClient.Insert(ctx, req)
	if err != nil {
		return fmt.Errorf("unable to create instance: %w", err)
	}

	if err = op.Wait(ctx); err != nil {
		return fmt.Errorf("unable to wait for the operation: %w", err)
	}

	fmt.Fprintf(w, "Instance created\n")

	return nil
}

Java


import com.google.api.gax.longrunning.OperationFuture;
import com.google.cloud.compute.v1.AttachedDisk;
import com.google.cloud.compute.v1.AttachedDisk.Type;
import com.google.cloud.compute.v1.AttachedDiskInitializeParams;
import com.google.cloud.compute.v1.InsertInstanceRequest;
import com.google.cloud.compute.v1.Instance;
import com.google.cloud.compute.v1.InstancesClient;
import com.google.cloud.compute.v1.NetworkInterface;
import com.google.cloud.compute.v1.Operation;
import java.io.IOException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class CreateInstance {

  public static void main(String[] args)
      throws IOException, InterruptedException, ExecutionException, TimeoutException {
    // TODO(developer): Replace these variables before running the sample.
    String project = "your-project-id";
    String zone = "zone-name";
    String instanceName = "instance-name";
    createInstance(project, zone, instanceName);
  }


  // Create a new instance with the provided "instanceName" value in the specified project and zone.
  public static void createInstance(String project, String zone, String instanceName)
      throws IOException, InterruptedException, ExecutionException, TimeoutException {
    // Below are sample values that can be replaced.
    // machineType: machine type of the VM being created.
    // *   This value uses the format zones/{zone}/machineTypes/{type_name}.
    // *   For a list of machine types, see https://cloud.google.com/compute/docs/machine-types
    // sourceImage: path to the operating system image to mount.
    // *   For details about images you can mount, see https://cloud.google.com/compute/docs/images
    // diskSizeGb: storage size of the boot disk to attach to the instance.
    // networkName: network interface to associate with the instance.
    String machineType = String.format("zones/%s/machineTypes/n1-standard-1", zone);
    String sourceImage = String
        .format("projects/debian-cloud/global/images/family/%s", "debian-11");
    long diskSizeGb = 10L;
    String networkName = "default";

    // Initialize client that will be used to send requests. This client only needs to be created
    // once, and can be reused for multiple requests. After completing all of your requests, call
    // the `instancesClient.close()` method on the client to safely
    // clean up any remaining background resources.
    try (InstancesClient instancesClient = InstancesClient.create()) {
      // Instance creation requires at least one persistent disk and one network interface.
      AttachedDisk disk =
          AttachedDisk.newBuilder()
              .setBoot(true)
              .setAutoDelete(true)
              .setType(Type.PERSISTENT.toString())
              .setDeviceName("disk-1")
              .setInitializeParams(
                  AttachedDiskInitializeParams.newBuilder()
                      .setSourceImage(sourceImage)
                      .setDiskSizeGb(diskSizeGb)
                      .build())
              .build();

      // Use the network interface provided in the networkName argument.
      NetworkInterface networkInterface = NetworkInterface.newBuilder()
          .setName(networkName)
          .build();

      // Bind `instanceName`, `machineType`, `disk`, and `networkInterface` to an instance.
      Instance instanceResource =
          Instance.newBuilder()
              .setName(instanceName)
              .setMachineType(machineType)
              .addDisks(disk)
              .addNetworkInterfaces(networkInterface)
              .build();

      System.out.printf("Creating instance: %s at %s %n", instanceName, zone);

      // Insert the instance in the specified project and zone.
      InsertInstanceRequest insertInstanceRequest = InsertInstanceRequest.newBuilder()
          .setProject(project)
          .setZone(zone)
          .setInstanceResource(instanceResource)
          .build();

      OperationFuture<Operation, Operation> operation = instancesClient.insertAsync(
          insertInstanceRequest);

      // Wait for the operation to complete.
      Operation response = operation.get(3, TimeUnit.MINUTES);

      if (response.hasError()) {
        System.out.println("Instance creation failed ! ! " + response);
        return;
      }
      System.out.println("Operation Status: " + response.getStatus());
    }
  }
}

Node.js

/**
 * TODO(developer): Uncomment and replace these variables before running the sample.
 */
// const projectId = 'YOUR_PROJECT_ID';
// const zone = 'europe-central2-b'
// const instanceName = 'YOUR_INSTANCE_NAME'
// const machineType = 'n1-standard-1';
// const sourceImage = 'projects/debian-cloud/global/images/family/debian-11';
// const networkName = 'global/networks/default';

const compute = require('@google-cloud/compute');

// Create a new instance with the values provided above in the specified project and zone.
async function createInstance() {
  const instancesClient = new compute.InstancesClient();

  console.log(`Creating the ${instanceName} instance in ${zone}...`);

  const [response] = await instancesClient.insert({
    instanceResource: {
      name: instanceName,
      disks: [
        {
          // Describe the size and source image of the boot disk to attach to the instance.
          initializeParams: {
            diskSizeGb: '10',
            sourceImage,
          },
          autoDelete: true,
          boot: true,
          type: 'PERSISTENT',
        },
      ],
      machineType: `zones/${zone}/machineTypes/${machineType}`,
      networkInterfaces: [
        {
          // Use the network interface provided in the networkName argument.
          name: networkName,
        },
      ],
    },
    project: projectId,
    zone,
  });
  let operation = response.latestResponse;
  const operationsClient = new compute.ZoneOperationsClient();

  // Wait for the create operation to complete.
  while (operation.status !== 'DONE') {
    [operation] = await operationsClient.wait({
      operation: operation.name,
      project: projectId,
      zone: operation.zone.split('/').pop(),
    });
  }

  console.log('Instance created.');
}

createInstance();

PHP

use Google\Cloud\Compute\V1\AttachedDisk;
use Google\Cloud\Compute\V1\AttachedDiskInitializeParams;
use Google\Cloud\Compute\V1\Client\InstancesClient;
use Google\Cloud\Compute\V1\Enums\AttachedDisk\Type;
use Google\Cloud\Compute\V1\InsertInstanceRequest;

/**
 * To correctly handle string enums in Cloud Compute library
 * use constants defined in the Enums subfolder.
 */
use Google\Cloud\Compute\V1\Instance;
use Google\Cloud\Compute\V1\NetworkInterface;

/**
 * Creates an instance in the specified project and zone.
 *
 * @param string $projectId Project ID of the Cloud project to create the instance in.
 * @param string $zone Zone to create the instance in (like "us-central1-a").
 * @param string $instanceName Unique name for this Compute Engine instance.
 * @param string $machineType Machine type of the instance being created.
 * @param string $sourceImage Boot disk image name or family.
 * @param string $networkName Network interface to associate with the instance.
 *
 * @throws \Google\ApiCore\ApiException if the remote call fails.
 * @throws \Google\ApiCore\ValidationException if local error occurs before remote call.
 */
function create_instance(
    string $projectId,
    string $zone,
    string $instanceName,
    string $machineType = 'n1-standard-1',
    string $sourceImage = 'projects/debian-cloud/global/images/family/debian-11',
    string $networkName = 'global/networks/default'
) {
    // Set the machine type using the specified zone.
    $machineTypeFullName = sprintf('zones/%s/machineTypes/%s', $zone, $machineType);

    // Describe the source image of the boot disk to attach to the instance.
    $diskInitializeParams = (new AttachedDiskInitializeParams())
        ->setSourceImage($sourceImage);
    $disk = (new AttachedDisk())
        ->setBoot(true)
        ->setAutoDelete(true)
        ->setType(Type::PERSISTENT)
        ->setInitializeParams($diskInitializeParams);

    // Use the network interface provided in the $networkName argument.
    $network = (new NetworkInterface())
        ->setName($networkName);

    // Create the Instance object.
    $instance = (new Instance())
        ->setName($instanceName)
        ->setDisks([$disk])
        ->setMachineType($machineTypeFullName)
        ->setNetworkInterfaces([$network]);

    // Insert the new Compute Engine instance using InstancesClient.
    $instancesClient = new InstancesClient();
    $request = (new InsertInstanceRequest())
        ->setInstanceResource($instance)
        ->setProject($projectId)
        ->setZone($zone);
    $operation = $instancesClient->insert($request);

    // Wait for the operation to complete.
    $operation->pollUntilComplete();
    if ($operation->operationSucceeded()) {
        printf('Created instance %s' . PHP_EOL, $instanceName);
    } else {
        $error = $operation->getError();
        printf('Instance creation failed: %s' . PHP_EOL, $error?->getMessage());
    }
}

Python

from __future__ import annotations

import re
import sys
from typing import Any
import warnings

from google.api_core.extended_operation import ExtendedOperation
from google.cloud import compute_v1


def get_image_from_family(project: str, family: str) -> compute_v1.Image:
    """
    Retrieve the newest image that is part of a given family in a project.

    Args:
        project: project ID or project number of the Cloud project you want to get image from.
        family: name of the image family you want to get image from.

    Returns:
        An Image object.
    """
    image_client = compute_v1.ImagesClient()
    # List of public operating system (OS) images: https://cloud.google.com/compute/docs/images/os-details
    newest_image = image_client.get_from_family(project=project, family=family)
    return newest_image


def disk_from_image(
    disk_type: str,
    disk_size_gb: int,
    boot: bool,
    source_image: str,
    auto_delete: bool = True,
) -> compute_v1.AttachedDisk:
    """
    Create an AttachedDisk object to be used in VM instance creation. Uses an image as the
    source for the new disk.

    Args:
         disk_type: the type of disk you want to create. This value uses the following format:
            "zones/{zone}/diskTypes/(pd-standard|pd-ssd|pd-balanced|pd-extreme)".
            For example: "zones/us-west3-b/diskTypes/pd-ssd"
        disk_size_gb: size of the new disk in gigabytes
        boot: boolean flag indicating whether this disk should be used as a boot disk of an instance
        source_image: source image to use when creating this disk. You must have read access to this disk. This can be one
            of the publicly available images or an image from one of your projects.
            This value uses the following format: "projects/{project_name}/global/images/{image_name}"
        auto_delete: boolean flag indicating whether this disk should be deleted with the VM that uses it

    Returns:
        AttachedDisk object configured to be created using the specified image.
    """
    boot_disk = compute_v1.AttachedDisk()
    initialize_params = compute_v1.AttachedDiskInitializeParams()
    initialize_params.source_image = source_image
    initialize_params.disk_size_gb = disk_size_gb
    initialize_params.disk_type = disk_type
    boot_disk.initialize_params = initialize_params
    # Remember to set auto_delete to True if you want the disk to be deleted when you delete
    # your VM instance.
    boot_disk.auto_delete = auto_delete
    boot_disk.boot = boot
    return boot_disk


def wait_for_extended_operation(
    operation: ExtendedOperation, verbose_name: str = "operation", timeout: int = 300
) -> Any:
    """
    Waits for the extended (long-running) operation to complete.

    If the operation is successful, it will return its result.
    If the operation ends with an error, an exception will be raised.
    If there were any warnings during the execution of the operation
    they will be printed to sys.stderr.

    Args:
        operation: a long-running operation you want to wait on.
        verbose_name: (optional) a more verbose name of the operation,
            used only during error and warning reporting.
        timeout: how long (in seconds) to wait for operation to finish.
            If None, wait indefinitely.

    Returns:
        Whatever the operation.result() returns.

    Raises:
        This method will raise the exception received from `operation.exception()`
        or RuntimeError if there is no exception set, but there is an `error_code`
        set for the `operation`.

        In case of an operation taking longer than `timeout` seconds to complete,
        a `concurrent.futures.TimeoutError` will be raised.
    """
    result = operation.result(timeout=timeout)

    if operation.error_code:
        print(
            f"Error during {verbose_name}: [Code: {operation.error_code}]: {operation.error_message}",
            file=sys.stderr,
            flush=True,
        )
        print(f"Operation ID: {operation.name}", file=sys.stderr, flush=True)
        raise operation.exception() or RuntimeError(operation.error_message)

    if operation.warnings:
        print(f"Warnings during {verbose_name}:\n", file=sys.stderr, flush=True)
        for warning in operation.warnings:
            print(f" - {warning.code}: {warning.message}", file=sys.stderr, flush=True)

    return result


def create_instance(
    project_id: str,
    zone: str,
    instance_name: str,
    disks: list[compute_v1.AttachedDisk],
    machine_type: str = "n1-standard-1",
    network_link: str = "global/networks/default",
    subnetwork_link: str = None,
    internal_ip: str = None,
    external_access: bool = False,
    external_ipv4: str = None,
    accelerators: list[compute_v1.AcceleratorConfig] = None,
    preemptible: bool = False,
    spot: bool = False,
    instance_termination_action: str = "STOP",
    custom_hostname: str = None,
    delete_protection: bool = False,
) -> compute_v1.Instance:
    """
    Send an instance creation request to the Compute Engine API and wait for it to complete.

    Args:
        project_id: project ID or project number of the Cloud project you want to use.
        zone: name of the zone to create the instance in. For example: "us-west3-b"
        instance_name: name of the new virtual machine (VM) instance.
        disks: a list of compute_v1.AttachedDisk objects describing the disks
            you want to attach to your new instance.
        machine_type: machine type of the VM being created. This value uses the
            following format: "zones/{zone}/machineTypes/{type_name}".
            For example: "zones/europe-west3-c/machineTypes/f1-micro"
        network_link: name of the network you want the new instance to use.
            For example: "global/networks/default" represents the network
            named "default", which is created automatically for each project.
        subnetwork_link: name of the subnetwork you want the new instance to use.
            This value uses the following format:
            "regions/{region}/subnetworks/{subnetwork_name}"
        internal_ip: internal IP address you want to assign to the new instance.
            By default, a free address from the pool of available internal IP addresses of
            used subnet will be used.
        external_access: boolean flag indicating if the instance should have an external IPv4
            address assigned.
        external_ipv4: external IPv4 address to be assigned to this instance. If you specify
            an external IP address, it must live in the same region as the zone of the instance.
            This setting requires `external_access` to be set to True to work.
        accelerators: a list of AcceleratorConfig objects describing the accelerators that will
            be attached to the new instance.
        preemptible: boolean value indicating if the new instance should be preemptible
            or not. Preemptible VMs have been deprecated and you should now use Spot VMs.
        spot: boolean value indicating if the new instance should be a Spot VM or not.
        instance_termination_action: What action should be taken once a Spot VM is terminated.
            Possible values: "STOP", "DELETE"
        custom_hostname: Custom hostname of the new VM instance.
            Custom hostnames must conform to RFC 1035 requirements for valid hostnames.
        delete_protection: boolean value indicating if the new virtual machine should be
            protected against deletion or not.
    Returns:
        Instance object.
    """
    instance_client = compute_v1.InstancesClient()

    # Use the network interface provided in the network_link argument.
    network_interface = compute_v1.NetworkInterface()
    network_interface.network = network_link
    if subnetwork_link:
        network_interface.subnetwork = subnetwork_link

    if internal_ip:
        network_interface.network_i_p = internal_ip

    if external_access:
        access = compute_v1.AccessConfig()
        access.type_ = compute_v1.AccessConfig.Type.ONE_TO_ONE_NAT.name
        access.name = "External NAT"
        access.network_tier = access.NetworkTier.PREMIUM.name
        if external_ipv4:
            access.nat_i_p = external_ipv4
        network_interface.access_configs = [access]

    # Collect information into the Instance object.
    instance = compute_v1.Instance()
    instance.network_interfaces = [network_interface]
    instance.name = instance_name
    instance.disks = disks
    if re.match(r"^zones/[a-z\d\-]+/machineTypes/[a-z\d\-]+$", machine_type):
        instance.machine_type = machine_type
    else:
        instance.machine_type = f"zones/{zone}/machineTypes/{machine_type}"

    instance.scheduling = compute_v1.Scheduling()
    if accelerators:
        instance.guest_accelerators = accelerators
        instance.scheduling.on_host_maintenance = (
            compute_v1.Scheduling.OnHostMaintenance.TERMINATE.name
        )

    if preemptible:
        # Set the preemptible setting
        warnings.warn(
            "Preemptible VMs are being replaced by Spot VMs.", DeprecationWarning
        )
        instance.scheduling = compute_v1.Scheduling()
        instance.scheduling.preemptible = True

    if spot:
        # Set the Spot VM setting
        instance.scheduling.provisioning_model = (
            compute_v1.Scheduling.ProvisioningModel.SPOT.name
        )
        instance.scheduling.instance_termination_action = instance_termination_action

    if custom_hostname is not None:
        # Set the custom hostname for the instance
        instance.hostname = custom_hostname

    if delete_protection:
        # Set the delete protection bit
        instance.deletion_protection = True

    # Prepare the request to insert an instance.
    request = compute_v1.InsertInstanceRequest()
    request.zone = zone
    request.project = project_id
    request.instance_resource = instance

    # Wait for the create operation to complete.
    print(f"Creating the {instance_name} instance in {zone}...")

    operation = instance_client.insert(request=request)

    wait_for_extended_operation(operation, "instance creation")

    print(f"Instance {instance_name} created.")
    return instance_client.get(project=project_id, zone=zone, instance=instance_name)

Ruby


require "google/cloud/compute/v1"

# Sends an instance creation request to the Compute Engine API and waits for it to complete.
#
# @param [String] project project ID or project number of the Cloud project you want to use.
# @param [String] zone name of the zone you want to use. For example: "us-west3-b"
# @param [String] instance_name name of the new virtual machine.
# @param [String] machine_type machine type of the VM being created. For example: "e2-standard-2"
#         See https://cloud.google.com/compute/docs/machine-types for more information
#         on machine types.
# @param [String] source_image path to the operating system image to mount on your boot
#         disk. This can be one of the public images
#         (like "projects/debian-cloud/global/images/family/debian-11")
#         or a private image you have access to.
#         See https://cloud.google.com/compute/docs/images for more information on available images.
# @param [String] network_name name of the network you want the new instance to use.
#         For example: "global/networks/default" represents the `default`
#         network interface, which is created automatically for each project.
def create_instance project:, zone:, instance_name:,
                    machine_type: "n2-standard-2",
                    source_image: "projects/debian-cloud/global/images/family/debian-11",
                    network_name: "global/networks/default"
  # Initialize client that will be used to send requests. This client only needs to be created
  # once, and can be reused for multiple requests.
  client = ::Google::Cloud::Compute::V1::Instances::Rest::Client.new

  # Construct the instance object.
  # It can be either a hash or ::Google::Cloud::Compute::V1::Instance instance.
  instance = {
    name: instance_name,
    machine_type: "zones/#{zone}/machineTypes/#{machine_type}",
    # Instance creation requires at least one persistent disk.
    disks: [{
      auto_delete: true,
      boot: true,
      type: :PERSISTENT,
      initialize_params: {
        source_image: source_image,
        disk_size_gb: 10
      }
    }],
    network_interfaces: [{ name: network_name }]
  }

  # Prepare a request to create the instance in the specified project and zone.
  request = { project: project, zone: zone, instance_resource: instance }

  puts "Creating the #{instance_name} instance in #{zone}..."
  begin
    # Send the insert request.
    operation = client.insert request
    # Wait for the create operation to complete.
    operation = wait_until_done operation: operation

    if operation.error?
      warn "Error during creation:", operation.error
    else
      compute_operation = operation.operation
      warn "Warning during creation:", compute_operation.warnings unless compute_operation.warnings.empty?
      puts "Instance #{instance_name} created."
    end
  rescue ::Google::Cloud::Error => e
    warn "Exception during creation:", e
  end
end

Répertorier les instances

Les exemples suivants permettent de répertorier les instances d'un projet, soit dans une zone, soit dans toutes les zones :