Déplacer une instance de VM entre plusieurs zones ou régions

Ce document explique comment déplacer une instance de machine virtuelle (VM) entre des zones ou des régions.

Avant de commencer

  • Consultez la documentation sur les zones.
  • Si ce n'est pas déjà fait, configurez l'authentification. L'authentification est le processus permettant de valider votre identité pour accéder aux services et aux API Google Cloud. Pour exécuter du code ou des exemples depuis un environnement de développement local, vous pouvez vous authentifier auprès de Compute Engine comme suit :

    Sélectionnez l'onglet correspondant à la façon dont vous prévoyez d'utiliser les exemples de cette page :

    gcloud

    1. Install the Google Cloud CLI, then initialize it by running the following command: 

      gcloud init
    2. Définissez une région et une zone par défaut.

    Go

    Pour utiliser les exemples Go de cette page dans un environnement de développement local, installez et initialisez gcloud CLI, puis configurez le service Identifiants par défaut de l'application à l'aide de vos identifiants utilisateur.

    1. Install the Google Cloud CLI.

    2. To initialize the gcloud CLI, run the following command: 

      gcloud init

    3. Create local authentication credentials for your user account: 

      gcloud auth application-default login

    Pour en savoir plus, consultez les sections sur Configurer l'authentification pour un environnement de développement local.

    Java

    Pour utiliser les exemples Java de cette page dans un environnement de développement local, installez et initialisez gcloud CLI, puis configurez le service Identifiants par défaut de l'application à l'aide de vos identifiants utilisateur.

    1. Install the Google Cloud CLI.

    2. To initialize the gcloud CLI, run the following command: 

      gcloud init

    3. Create local authentication credentials for your user account: 

      gcloud auth application-default login

    Pour en savoir plus, consultez les sections sur Configurer l'authentification pour un environnement de développement local.

    Node.js

    Pour utiliser les exemples Node.js de cette page dans un environnement de développement local, installez et initialisez gcloud CLI, puis configurez le service Identifiants par défaut de l'application à l'aide de vos identifiants utilisateur.

    1. Install the Google Cloud CLI.

    2. To initialize the gcloud CLI, run the following command: 

      gcloud init

    3. Create local authentication credentials for your user account: 

      gcloud auth application-default login

    Pour en savoir plus, consultez les sections sur Configurer l'authentification pour un environnement de développement local.

    Python

    Pour utiliser les exemples Python de cette page dans un environnement de développement local, installez et initialisez gcloud CLI, puis configurez le service Identifiants par défaut de l'application à l'aide de vos identifiants utilisateur.

    1. Install the Google Cloud CLI.

    2. To initialize the gcloud CLI, run the following command: 

      gcloud init

    3. Create local authentication credentials for your user account: 

      gcloud auth application-default login

    Pour en savoir plus, consultez les sections sur Configurer l'authentification pour un environnement de développement local.

Conditions requises

Cette section répertorie les exigences pour déplacer une VM entre des zones et des régions :

  • Quota du projet. Votre projet doit disposer d'un quota suffisant pour effectuer les opérations suivantes :

    • Créer des instantanés.
    • Convertir les adresses IP externes éphémères.

    • Créer des VM et des disques dans la région de destination.

      Par exemple, si la VM que vous souhaitez déplacer est associée à trois disques, vous devez disposer d'un quota suffisant pour pouvoir créer trois instantanés de disque persistant temporaires et trois disques. Après avoir créé vos disques, vous pouvez supprimer vos instantanés temporaires.

    Consultez la page Quotas pour vous assurer que vous disposez d'un quota suffisant pour les ressources précédentes. Pour en savoir plus, consultez la page Comprendre les quotas.

  • Disques persistants. Les disques persistants associés à la VM que vous souhaitez déplacer ne sont pas associés à d'autres VM.

  • Disques SSD locaux. Les disques SSD locaux sont destinés au stockage temporaire. Les données stockées sur ces disques ne sont pas conservées lorsque vous arrêtez manuellement une VM. Si vous devez conserver les données présentes sur des disques SSD locaux, répliquez-les à l'aide d'une option de stockage durable (telle que des disques persistants).

  • GPU. Si votre VM comprend des GPU, vérifiez que ceux que vous souhaitez utiliser sont disponibles dans la zone de destination de la VM. Pour obtenir la liste des GPU et des zones dans lesquelles ils sont disponibles, consultez la section GPU sur Compute Engine.

  • Sous-réseau. Si vous souhaitez déplacer votre VM entre des régions (par exemple, entre us-west1-a et asia-south1-b) et que votre VM appartient à un sous-réseau, vous devez sélectionner un nouveau sous-réseau pour votre VM. Pour obtenir des instructions sur la création de sous-réseaux, consultez la section Ajouter des sous-réseaux.

Limite

Si vous déplacez une VM d'une région à une autre, vous ne pouvez pas conserver son adresse IP interne ou externe éphémère. Vous devez choisir une nouvelle adresse IP lors de la recréation de la VM.

Propriétés de la ressource

Pour déplacer votre VM, vous devez l'arrêter, la déplacer vers la zone ou la région de destination, puis la redémarrer. Après avoir déplacé votre VM, mettez à jour les références à votre ressource d'origine, telles que les VM ou les pools cibles qui pointent vers la VM précédente.

Pendant le déplacement, certaines propriétés générées par le serveur associées à votre VM et à vos disques changent.

Propriétés modifiées pour les VM

Le tableau suivant décrit les propriétés qui changent pour les VM :

Nom de propriété Modifications
Adresse IP interne Une nouvelle adresse IP interne est généralement attribuée, mais il est possible que la VM conserve son adresse IP interne d'origine.
Adresse IP externe Si vous déplacez la VM entre plusieurs zones au sein de la même région, l'adresse IP externe reste la même. Dans le cas contraire, choisissez une adresse IP différente pour l'instance de VM.
Plate-forme du processeur Selon la plate-forme de processeur disponible dans votre zone de destination, votre VM peut disposer d'une plate-forme différente après son déplacement. Pour obtenir la liste complète des plates-formes de processeur disponibles dans chaque zone, consultez la section Régions et zones disponibles.
Réseau/Sous-réseau Si votre VM appartient à un sous-réseau et que vous la déplacez vers une autre région, vous devez choisir un nouveau sous-réseau pour votre VM. Si vous déplacez une VM vers une zone de la même région, celle-ci conserve son sous-réseau.

Propriétés modifiées pour les disques

Le tableau suivant décrit les propriétés modifiées pour les disques :

Nom de propriété Modifications
Instantané source L'instantané source du nouveau disque est remplacé par l'instantané temporaire créé pendant le déplacement.
ID de l'instantané source L'ID de l'instantané source est remplacé par l'ID de l'instantané temporaire.
Image source Le champ d'image source est vide.
ID de l'image L'ID de l'image est vide.
Dernier horodatage de dissociation Le dernier horodatage de dissociation est vide.
Dernier horodatage d'association Le dernier horodatage d'association est défini sur l'horodatage lié à l'association du nouveau disque à la nouvelle instance.

Propriétés modifiées pour les VM et les disques

Le tableau suivant décrit les propriétés modifiées pour les VM et les disques :

Nom de propriété Modifications
ID Un nouvel ID de ressource est généré.
Horodatage de création Un nouvel horodatage de création est généré.
URL des ressources de la zone Toutes les URL des ressources de la zone sont modifiées pour correspondre à la zone de destination. La liste suivante indique les URL de ressources modifiées :
  • L'URL du disque source d'une VM
  • L'URL du type de machine d'une VM
  • Les URL des liens auto
  • Les URL de zone
  • Les URL de type de disque
  • Toutes les URL des VM répertoriées dans la liste users[] d'un disque

Déplacer une VM entre des zones ou des régions

Pour déplacer une VM d'une zone ou d'une région à une autre, procédez comme suit :

  1. Créez une image système de votre VM source.
  2. Créez une VM à partir de l'image système dans une zone ou une région différente.

Les exemples suivants montrent comment déplacer une VM entre des zones.

gcloud

Dans cet exemple, vous déplacez une VM nommée myinstance qui comporte deux disques persistants nommés mybootdisk et mydatadisk, de europe-west1-c à us-west1-b.

  1. Identifiez les disques associés à VM que vous souhaitez déplacer :

    gcloud compute instances describe myinstance --format="list(name,status,disks)"

    Dans cet exemple, les deux disques suivants sont associés à la VM myinstance :

    • Un disque de démarrage appelé mybootdisk
    • Un disque de données appelé mydatadisk

  2. Définissez l'état de suppression automatique de mybootdisk et de mydatadisk sur false, pour vous assurer de conserver les disques lors de la suppression de la VM.

    gcloud compute instances set-disk-auto-delete myinstance --zone europe-west1-c \
    --disk mybootdisk --no-auto-delete

    Si l'état de suppression automatique a bien été mis à jour, gcloud compute renvoie la réponse Updated [...]. S'il était déjà défini sur "false", gcloud compute renvoie la réponse suivante :

    No change requested; skipping update for [myinstance].

  3. (Facultatif) Enregistrez vos métadonnées de VM.

    Lorsque vous supprimez votre VM, les métadonnées de la VM sont également effacées. Vous pouvez sauvegarder ces informations dans un fichier distinct, puis réutiliser les métadonnées dans la nouvelle VM.

    Décrivez les métadonnées de votre VM en exécutant la commande suivante :

    gcloud compute instances describe myinstance --zone europe-west1-c

    Enregistrez le contenu dans un fichier séparé.

  4. Créez des sauvegardes de vos données à l'aide d'instantanés de disque persistant.

    Par précaution, sauvegardez vos données pendant que les disques persistants sont associés à la VM, en utilisant des instantanés de disque persistant. Avant de prendre un instantané, assurez-vous qu'il est cohérent avec l'état du disque persistant en respectant les bonnes pratiques concernant les instantanés.

    Après avoir effacé les tampons de votre disque, créez les instantanés :

    gcloud compute disks snapshot mybootdisk mydatadisk \
    --snapshot-names backup-mybootsnapshot,backup-mydatasnapshot \
    --zone europe-west1-c

    Pour vérifier que l'instantané a bien été créé, exécutez la commande gcloud compute snapshots list.

  5. (Facultatif) Si vous déplacez une VM entre des zones de la même région et que vous souhaitez conserver son adresse IP interne ou externe éphémère, convertissez l'instance interne ou une adresse IP externe vers une adresse IP statique que vous pouvez réutiliser ultérieurement.

  6. Supprimez votre VM.

    La suppression de votre VM l'arrête correctement et dissocie tous les disques persistants.

    gcloud compute instances delete myinstance --zone europe-west1-c

    gcloud vous invite à confirmer la suppression :

    
The following VMs are deleted. Any attached disks configured to
be auto-deleted are deleted unless they are attached to any other
VMs or the `--keep-disks` flag is given and specifies them for keeping.
Deleting a disk is irreversible and any data on the disk is lost.
— [myinstance] in [europe-west1-c]

    Do you want to continue (Y/n)?

    Comme vous avez précédemment désactivé l'état de suppression automatique des disques, appuyez sur Y pour ignorer l'avertissement et continuer.

  7. Créez ensuite un autre instantané du disque de démarrage et du disque de données.

    gcloud compute disks snapshot mybootdisk mydatadisk \
    --snapshot-names mybootsnapshot,mydatasnapshot \
    --zone europe-west1-c 
    Created [.../mydatasnapshot].
Created [.../mybootsnapshot].

  8. (Facultatif) Supprimez vos disques persistants.

    Si vous prévoyez de réutiliser les noms des disques persistants pour les nouveaux disques, vous devez supprimer les disques existants afin de libérer les noms. Cette suppression permet également de réduire les coûts de stockage sur disque persistant.

    Si vous n'envisagez pas de réutiliser les mêmes noms de disques, il n'est pas nécessaire de les supprimer.

    gcloud compute disks delete mybootdisk mydatadisk --zone europe-west1-c

  9. Créez des disques persistants dans us-west1-b à partir des instantanés que vous avez créés. Commencez par créer le disque de démarrage.

    gcloud compute disks create mybootdiskb --source-snapshot mybootsnapshot \
    --zone us-west1-b
     
    Created [.../mybootdiskb].
NAME        ZONE           SIZE_GB TYPE        STATUS
mybootdiskb us-west1-b     100     pd-standard READY

    Créez ensuite le disque de données.

    gcloud compute disks create mydatadiskb --source-snapshot mydatasnapshot \
    --zone us-west1-b
     
    Created [.../mydatadiskb].
NAME        ZONE           SIZE_GB TYPE        STATUS
mydatadiskb us-west1-b 4000    pd-standard READY

  10. Recréez votre VM dans us-west1-b.

    • Si vous avez choisi d'enregistrer vos métadonnées de VM dans un fichier (par exemple, myinstance.describe), vous pouvez l'exploiter pour définir les mêmes métadonnées sur votre VM.

    • Si votre VM possédait une adresse IP externe statique, vous pouvez la réattribuer à votre nouvelle VM en spécifiant l'option --address [ADDRESS]. Si vous déplacez une VM d'une région à une autre, vous devez choisir une adresse IP externe différente pour la nouvelle instance de VM.

    • Si votre VM possédait une adresse IP interne statique, vous pouvez la réattribuer à votre nouvelle VM en spécifiant l'option --private-network-ip ADDRESS. Si vous déplacez une VM d'une région à une autre, vous devez choisir une adresse IP interne différente pour la nouvelle instance de VM.

    • Si votre VM incluait des GPU, ajoutez des GPU à la VM à l'aide de l'option --accelerator.

    • Si la VM utilise un sous-réseau spécifique, ajoutez l'option --subnet [SUBNET_NAME].

    Pour obtenir la liste complète des indicateurs supplémentaires, consultez la page concernant gcloud compute instances create.

    gcloud compute instances create myinstanceb --machine-type n1-standard-4 \
    --zone us-west1-b \
    --disk name=mybootdiskb,boot=yes,mode=rw \
    --disk name=mydatadiskb,mode=rw 
    Created [.../myinstanceb].
NAME        ZONE           MACHINE_TYPE  INTERNAL_IP    EXTERNAL_IP     STATUS
myinstanceb us-west1-b     n1-standard-4 10.240.173.229 146.148.112.106 RUNNING

  11. (Facultatif) Supprimez vos instantanés de disque persistant.

    Après avoir confirmé le déplacement de vos machines virtuelles, supprimez les instantanés temporaires que vous avez créés afin de réduire les coûts de stockage.

    gcloud compute snapshots delete mybootsnapshot mydatasnapshot

    Si vous n'avez plus besoin de vos instantanés de sauvegarde, supprimez-les également :

    gcloud compute snapshots delete backup-mybootsnapshot backup-mydatasnapshot

Go

  1. Obtenez des informations sur la VM et identifiez les disques qui lui sont associés.

    compute/get_instance.go 
    import (
	"context"
	"fmt"
	"io"

	compute "cloud.google.com/go/compute/apiv1"
	computepb "google.golang.org/genproto/googleapis/cloud/compute/v1"
)

// getInstance prints a name of a VM instance in the given zone in the specified project.
func getInstance(w io.Writer, projectID, zone, instanceName string) error {
	// projectID := "your_project_id"
	// zone := "europe-central2-b"
	// instanceName := "your_instance_name"

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

	reqInstance := &computepb.GetInstanceRequest{
		Project:  projectID,
		Zone:     zone,
		Instance: instanceName,
	}

	instance, err := instancesClient.Get(ctx, reqInstance)
	if err != nil {
		return fmt.Errorf("unable to get instance: %w", err)
	}

	fmt.Fprintf(w, "Instance: %s\n", instance.GetName())

	return nil
}

  2. Définissez l'état de suppression automatique du disque de démarrage et du disque de données sur false pour vous assurer de conserver les disques lors de la suppression de la VM.

    compute/disks/set_disk_autodelete.go 
    import (
	"context"
	"fmt"
	"io"

	compute "cloud.google.com/go/compute/apiv1"
	computepb "google.golang.org/genproto/googleapis/cloud/compute/v1"
)

// setDiskAutodelete sets the autodelete flag of a disk to given value.
func setDiskAutoDelete(
	w io.Writer,
	projectID, zone, instanceName, diskName string, autoDelete bool,
) error {
	// projectID := "your_project_id"
	// zone := "us-west3-b"
	// instanceName := "your_instance_name"
	// diskName := "your_disk_name"
	// autoDelete := true

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

	getInstanceReq := &computepb.GetInstanceRequest{
		Project:  projectID,
		Zone:     zone,
		Instance: instanceName,
	}

	instance, err := instancesClient.Get(ctx, getInstanceReq)
	if err != nil {
		return fmt.Errorf("unable to get instance: %w", err)
	}

	diskExists := false

	for _, disk := range instance.GetDisks() {
		if disk.GetDeviceName() == diskName {
			diskExists = true
			break
		}
	}

	if !diskExists {
		return fmt.Errorf(
			"instance %s doesn't have a disk named %s attached",
			instanceName,
			diskName,
		)
	}

	req := &computepb.SetDiskAutoDeleteInstanceRequest{
		Project:    projectID,
		Zone:       zone,
		Instance:   instanceName,
		DeviceName: diskName,
		AutoDelete: autoDelete,
	}

	op, err := instancesClient.SetDiskAutoDelete(ctx, req)
	if err != nil {
		return fmt.Errorf("unable to set disk autodelete field: %w", err)
	}

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

	fmt.Fprintf(w, "disk autoDelete field updated.\n")

	return nil
}

  3. Créez des sauvegardes de vos données à l'aide d'instantanés de disque persistant.

    Par précaution, sauvegardez vos données pendant que les disques persistants sont associés à la VM, en utilisant des instantanés de disque persistant. Avant de prendre un instantané, assurez-vous qu'il est cohérent avec l'état du disque persistant en respectant les bonnes pratiques concernant les instantanés.

    Après avoir effacé les tampons de votre disque, créez les instantanés :

    compute/snapshots/create_snapshot.go 
    import (
	"context"
	"fmt"
	"io"

	compute "cloud.google.com/go/compute/apiv1"
	computepb "google.golang.org/genproto/googleapis/cloud/compute/v1"
	"google.golang.org/protobuf/proto"
)

// createSnapshot creates a snapshot of a disk.
func createSnapshot(
	w io.Writer,
	projectID, diskName, snapshotName, zone, region, location, diskProjectID string,
) error {
	// projectID := "your_project_id"
	// diskName := "your_disk_name"
	// snapshotName := "your_snapshot_name"
	// zone := "europe-central2-b"
	// region := "eupore-central2"
	// location = "eupore-central2"
	// diskProjectID = "YOUR_DISK_PROJECT_ID"

	ctx := context.Background()

	snapshotsClient, err := compute.NewSnapshotsRESTClient(ctx)
	if err != nil {
		return fmt.Errorf("NewSnapshotsRESTClient: %w", err)
	}
	defer snapshotsClient.Close()

	if zone == "" && region == "" {
		return fmt.Errorf("you need to specify `zone` or `region` for this function to work")
	}

	if zone != "" && region != "" {
		return fmt.Errorf("you can't set both `zone` and `region` parameters")
	}

	if diskProjectID == "" {
		diskProjectID = projectID
	}

	disk := &computepb.Disk{}
	locations := []string{}
	if location != "" {
		locations = append(locations, location)
	}

	if zone != "" {
		disksClient, err := compute.NewDisksRESTClient(ctx)
		if err != nil {
			return fmt.Errorf("NewDisksRESTClient: %w", err)
		}
		defer disksClient.Close()

		getDiskReq := &computepb.GetDiskRequest{
			Project: projectID,
			Zone:    zone,
			Disk:    diskName,
		}

		disk, err = disksClient.Get(ctx, getDiskReq)
		if err != nil {
			return fmt.Errorf("unable to get disk: %w", err)
		}
	} else {
		regionDisksClient, err := compute.NewRegionDisksRESTClient(ctx)
		if err != nil {
			return fmt.Errorf("NewRegionDisksRESTClient: %w", err)
		}
		defer regionDisksClient.Close()

		getDiskReq := &computepb.GetRegionDiskRequest{
			Project: projectID,
			Region:  region,
			Disk:    diskName,
		}

		disk, err = regionDisksClient.Get(ctx, getDiskReq)
		if err != nil {
			return fmt.Errorf("unable to get disk: %w", err)
		}
	}

	req := &computepb.InsertSnapshotRequest{
		Project: projectID,
		SnapshotResource: &computepb.Snapshot{
			Name:             proto.String(snapshotName),
			SourceDisk:       proto.String(disk.GetSelfLink()),
			StorageLocations: locations,
		},
	}

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

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

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

	return nil
}

  4. Supprimez votre VM de la zone source.

    compute/delete_instance.go 
    import (
	"context"
	"fmt"
	"io"

	compute "cloud.google.com/go/compute/apiv1"
	computepb "google.golang.org/genproto/googleapis/cloud/compute/v1"
)

// deleteInstance sends a delete request to the Compute Engine API and waits for it to complete.
func deleteInstance(w io.Writer, projectID, zone, instanceName string) error {
	// projectID := "your_project_id"
	// zone := "europe-central2-b"
	// instanceName := "your_instance_name"
	ctx := context.Background()
	instancesClient, err := compute.NewInstancesRESTClient(ctx)
	if err != nil {
		return fmt.Errorf("NewInstancesRESTClient: %w", err)
	}
	defer instancesClient.Close()

	req := &computepb.DeleteInstanceRequest{
		Project:  projectID,
		Zone:     zone,
		Instance: instanceName,
	}

	op, err := instancesClient.Delete(ctx, req)
	if err != nil {
		return fmt.Errorf("unable to delete 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 deleted\n")

	return nil
}

  5. Créez ensuite un autre instantané du disque de démarrage et du disque de données.

    compute/snapshots/create_snapshot.go 
    import (
	"context"
	"fmt"
	"io"

	compute "cloud.google.com/go/compute/apiv1"
	computepb "google.golang.org/genproto/googleapis/cloud/compute/v1"
	"google.golang.org/protobuf/proto"
)

// createSnapshot creates a snapshot of a disk.
func createSnapshot(
	w io.Writer,
	projectID, diskName, snapshotName, zone, region, location, diskProjectID string,
) error {
	// projectID := "your_project_id"
	// diskName := "your_disk_name"
	// snapshotName := "your_snapshot_name"
	// zone := "europe-central2-b"
	// region := "eupore-central2"
	// location = "eupore-central2"
	// diskProjectID = "YOUR_DISK_PROJECT_ID"

	ctx := context.Background()

	snapshotsClient, err := compute.NewSnapshotsRESTClient(ctx)
	if err != nil {
		return fmt.Errorf("NewSnapshotsRESTClient: %w", err)
	}
	defer snapshotsClient.Close()

	if zone == "" && region == "" {
		return fmt.Errorf("you need to specify `zone` or `region` for this function to work")
	}

	if zone != "" && region != "" {
		return fmt.Errorf("you can't set both `zone` and `region` parameters")
	}

	if diskProjectID == "" {
		diskProjectID = projectID
	}

	disk := &computepb.Disk{}
	locations := []string{}
	if location != "" {
		locations = append(locations, location)
	}

	if zone != "" {
		disksClient, err := compute.NewDisksRESTClient(ctx)
		if err != nil {
			return fmt.Errorf("NewDisksRESTClient: %w", err)
		}
		defer disksClient.Close()

		getDiskReq := &computepb.GetDiskRequest{
			Project: projectID,
			Zone:    zone,
			Disk:    diskName,
		}

		disk, err = disksClient.Get(ctx, getDiskReq)
		if err != nil {
			return fmt.Errorf("unable to get disk: %w", err)
		}
	} else {
		regionDisksClient, err := compute.NewRegionDisksRESTClient(ctx)
		if err != nil {
			return fmt.Errorf("NewRegionDisksRESTClient: %w", err)
		}
		defer regionDisksClient.Close()

		getDiskReq := &computepb.GetRegionDiskRequest{
			Project: projectID,
			Region:  region,
			Disk:    diskName,
		}

		disk, err = regionDisksClient.Get(ctx, getDiskReq)
		if err != nil {
			return fmt.Errorf("unable to get disk: %w", err)
		}
	}

	req := &computepb.InsertSnapshotRequest{
		Project: projectID,
		SnapshotResource: &computepb.Snapshot{
			Name:             proto.String(snapshotName),
			SourceDisk:       proto.String(disk.GetSelfLink()),
			StorageLocations: locations,
		},
	}

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

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

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

	return nil
}

  6. (Facultatif) Supprimez vos disques persistants.

    Si vous prévoyez de réutiliser les noms des disques persistants pour les nouveaux disques, vous devez supprimer les disques existants afin de libérer les noms. Cette suppression permet également de réduire les coûts de stockage sur disque persistant.

    Si vous n'envisagez pas de réutiliser les mêmes noms de disques, il n'est pas nécessaire de les supprimer.

    compute/disks/delete_disk.go 
    import (
	"context"
	"fmt"
	"io"

	compute "cloud.google.com/go/compute/apiv1"
	computepb "google.golang.org/genproto/googleapis/cloud/compute/v1"
)

// deleteDisk deletes a disk from a project.
func deleteDisk(w io.Writer, projectID, zone, diskName string) error {
	// projectID := "your_project_id"
	// zone := "us-west3-b"
	// diskName := "your_disk_name"

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

	req := &computepb.DeleteDiskRequest{
		Project: projectID,
		Zone:    zone,
		Disk:    diskName,
	}

	op, err := disksClient.Delete(ctx, req)
	if err != nil {
		return fmt.Errorf("unable to delete disk: %w", err)
	}

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

	fmt.Fprintf(w, "Disk deleted\n")

	return nil
}

  7. Créez des disques persistants dans la zone de destination à partir des instantanés que vous avez créés. Commencez par créer le disque de démarrage, puis les disques de données.

    compute/disks/create_disk_from_snapshot.go 
    import (
	"context"
	"fmt"
	"io"

	compute "cloud.google.com/go/compute/apiv1"
	computepb "google.golang.org/genproto/googleapis/cloud/compute/v1"
	"google.golang.org/protobuf/proto"
)

// createDiskFromSnapshot creates a new disk in a project in given zone.
func createDiskFromSnapshot(
	w io.Writer,
	projectID, zone, diskName, diskType, snapshotLink string,
	diskSizeGb int64,
) error {
	// projectID := "your_project_id"
	// zone := "us-west3-b" // should match diskType below
	// diskName := "your_disk_name"
	// diskType := "zones/us-west3-b/diskTypes/pd-ssd"
	// snapshotLink := "projects/your_project_id/global/snapshots/snapshot_name"
	// diskSizeGb := 120

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

	req := &computepb.InsertDiskRequest{
		Project: projectID,
		Zone:    zone,
		DiskResource: &computepb.Disk{
			Name:           proto.String(diskName),
			Zone:           proto.String(zone),
			Type:           proto.String(diskType),
			SourceSnapshot: proto.String(snapshotLink),
			SizeGb:         proto.Int64(diskSizeGb),
		},
	}

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

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

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

	return nil
}

  8. Recréez votre VM avec les nouveaux disques dans la zone de destination.

    compute/instances/create-start-instance/create_instance_with_existing_disks.go 
    import (
	"context"
	"fmt"
	"io"

	compute "cloud.google.com/go/compute/apiv1"
	computepb "google.golang.org/genproto/googleapis/cloud/compute/v1"
	"google.golang.org/protobuf/proto"
)

// createWithExistingDisks create a new VM instance using selected disks.
// The first disk in diskNames will be used as boot disk.
func createWithExistingDisks(
	w io.Writer,
	projectID, zone, instanceName string,
	diskNames []string,
) error {
	// projectID := "your_project_id"
	// zone := "europe-central2-b"
	// instanceName := "your_instance_name"
	// diskNames := []string{"boot_disk", "disk1", "disk2"}

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

	disksClient, err := compute.NewDisksRESTClient(ctx)
	if err != nil {
		return fmt.Errorf("NewDisksRESTClient: %w", err)
	}
	defer disksClient.Close()

	disks := [](*computepb.Disk){}

	for _, diskName := range diskNames {
		reqDisk := &computepb.GetDiskRequest{
			Project: projectID,
			Zone:    zone,
			Disk:    diskName,
		}

		disk, err := disksClient.Get(ctx, reqDisk)
		if err != nil {
			return fmt.Errorf("unable to get disk: %w", err)
		}

		disks = append(disks, disk)
	}

	attachedDisks := [](*computepb.AttachedDisk){}

	for _, disk := range disks {
		attachedDisk := &computepb.AttachedDisk{
			Source: proto.String(disk.GetSelfLink()),
		}
		attachedDisks = append(attachedDisks, attachedDisk)
	}

	attachedDisks[0].Boot = proto.Bool(true)

	instanceResource := &computepb.Instance{
		Name:        proto.String(instanceName),
		Disks:       attachedDisks,
		MachineType: proto.String(fmt.Sprintf("zones/%s/machineTypes/n1-standard-1", zone)),
		NetworkInterfaces: []*computepb.NetworkInterface{
			{
				Name: proto.String("global/networks/default"),
			},
		},
	}

	req := &computepb.InsertInstanceRequest{
		Project:          projectID,
		Zone:             zone,
		InstanceResource: instanceResource,
	}

	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
}

  9. (Facultatif) Supprimez les instantanés de disque temporaires. Après avoir confirmé le déplacement de vos machines virtuelles, supprimez les instantanés temporaires que vous avez créés afin de réduire les coûts de stockage.

    compute/snapshots/delete_snapshot.go 
    import (
	"context"
	"fmt"
	"io"

	compute "cloud.google.com/go/compute/apiv1"
	computepb "google.golang.org/genproto/googleapis/cloud/compute/v1"
)

// deleteSnapshot deletes a snapshot of a disk.
func deleteSnapshot(w io.Writer, projectID, snapshotName string) error {
	// projectID := "your_project_id"
	// snapshotName := "your_snapshot_name"

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

	req := &computepb.DeleteSnapshotRequest{
		Project:  projectID,
		Snapshot: snapshotName,
	}

	op, err := snapshotsClient.Delete(ctx, req)
	if err != nil {
		return fmt.Errorf("unable to delete snapshot: %w", err)
	}

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

	fmt.Fprintf(w, "Snapshot deleted\n")

	return nil
}

Java

  1. Obtenez des informations sur la VM et identifiez les disques qui lui sont associés.

    compute/cloud-client/src/main/java/compute/GetInstance.java 
    
import com.google.cloud.compute.v1.Instance;
import com.google.cloud.compute.v1.InstancesClient;
import java.io.IOException;

public class GetInstance {

  public static void main(String[] args) throws IOException {
    // TODO(developer): Replace these variables before running the sample.

    // Project ID or project number of the Cloud project you want to use.
    String projectId = "YOUR_PROJECT_ID";

    // Name of the zone you want to use. For example: 'us-west3-b'.
    String zone = "europe-central2-b";

    // Name of the VM instance you want to query.
    String instanceName = "YOUR_INSTANCE_NAME";

    getInstance(projectId, zone, instanceName);
  }

  // Prints information about a VM instance in the given zone in the specified project.
  public static void getInstance(String projectId, String zone, String instanceName)
      throws IOException {

    // 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 instance = instancesClient.get(projectId, zone, instanceName);

      System.out.printf("Retrieved the instance %s", instance.toString());
    }
  }
}

  2. Définissez l'état de suppression automatique du disque de démarrage et du disque de données sur false pour vous assurer de conserver les disques lors de la suppression de la VM.

    compute/cloud-client/src/main/java/compute/disks/SetDiskAutodelete.java 
    
import com.google.cloud.compute.v1.Instance;
import com.google.cloud.compute.v1.InstancesClient;
import com.google.cloud.compute.v1.Operation;
import com.google.cloud.compute.v1.SetDiskAutoDeleteInstanceRequest;
import java.io.IOException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class SetDiskAutodelete {

  public static void main(String[] args)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {
    // TODO(developer): Replace these variables before running the sample.

    // Project ID or project number of the Cloud project you want to use.
    String projectId = "YOUR_PROJECT_ID";

    // The zone of the disk that you want to modify.
    String zone = "europe-central2-b";

    // Name of the instance the disk is attached to.
    String instanceName = "YOUR_INSTANCE_NAME";

    // The name of the disk for which you want to modify the autodelete flag.
    String diskName = "YOUR_DISK_NAME";

    // The new value of the autodelete flag.
    boolean autoDelete = true;

    setDiskAutodelete(projectId, zone, instanceName, diskName, autoDelete);
  }

  // Sets the autodelete flag of a disk to given value.
  public static void setDiskAutodelete(String projectId, String zone, String instanceName,
      String diskName, boolean autoDelete)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {

    // 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()) {

      // Retrieve the instance given by the instanceName.
      Instance instance = instancesClient.get(projectId, zone, instanceName);

      // Check if the instance contains a disk that matches the given diskName.
      boolean diskNameMatch = instance.getDisksList()
          .stream()
          .anyMatch(disk -> disk.getDeviceName().equals(diskName));

      if (!diskNameMatch) {
        throw new Error(
            String.format("Instance %s doesn't have a disk named %s attached", instanceName,
                diskName));
      }

      // Create the request object.
      SetDiskAutoDeleteInstanceRequest request = SetDiskAutoDeleteInstanceRequest.newBuilder()
          .setProject(projectId)
          .setZone(zone)
          .setInstance(instanceName)
          .setDeviceName(diskName)
          // Update the autodelete property.
          .setAutoDelete(autoDelete)
          .build();

      // Wait for the update instance operation to complete.
      Operation response = instancesClient.setDiskAutoDeleteAsync(request)
          .get(3, TimeUnit.MINUTES);

      if (response.hasError()) {
        System.out.println("Failed to update Disk autodelete field!" + response);
        return;
      }
      System.out.println(
          "Disk autodelete field updated. Operation Status: " + response.getStatus());
    }
  }
}

  3. Créez des sauvegardes de vos données à l'aide d'instantanés de disque persistant.

    Par précaution, sauvegardez vos données pendant que les disques persistants sont associés à la VM, en utilisant des instantanés de disque persistant. Avant de prendre un instantané, assurez-vous qu'il est cohérent avec l'état du disque persistant en respectant les bonnes pratiques concernant les instantanés.

    Après avoir effacé les tampons de votre disque, créez les instantanés :

    compute/cloud-client/src/main/java/compute/disks/CreateSnapshot.java 
    
import com.google.cloud.compute.v1.Disk;
import com.google.cloud.compute.v1.DisksClient;
import com.google.cloud.compute.v1.Operation;
import com.google.cloud.compute.v1.RegionDisksClient;
import com.google.cloud.compute.v1.Snapshot;
import com.google.cloud.compute.v1.SnapshotsClient;
import java.io.IOException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class CreateSnapshot {

  public static void main(String[] args)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {
    // TODO(developer): Replace these variables before running the sample.
    // You need to pass `zone` or `region` parameter relevant to the disk you want to
    // snapshot, but not both. Pass `zone` parameter for zonal disks and `region` for
    // regional disks.

    // Project ID or project number of the Cloud project you want to use.
    String projectId = "YOUR_PROJECT_ID";

    // Name of the disk you want to create.
    String diskName = "YOUR_DISK_NAME";

    // Name of the snapshot that you want to create.
    String snapshotName = "YOUR_SNAPSHOT_NAME";

    // The zone of the source disk from which you create the snapshot (for zonal disks).
    String zone = "europe-central2-b";

    // The region of the source disk from which you create the snapshot (for regional disks).
    String region = "your-disk-region";

    // The Cloud Storage multi-region or the Cloud Storage region where you
    // want to store your snapshot.
    // You can specify only one storage location. Available locations:
    // https://cloud.google.com/storage/docs/locations#available-locations
    String location = "europe-central2";

    // Project ID or project number of the Cloud project that
    // hosts the disk you want to snapshot. If not provided, the value will be defaulted
    // to 'projectId' value.
    String diskProjectId = "YOUR_DISK_PROJECT_ID";

    createSnapshot(projectId, diskName, snapshotName, zone, region, location, diskProjectId);
  }

  // Creates a snapshot of a disk.
  public static void createSnapshot(String projectId, String diskName, String snapshotName,
      String zone, String region, String location, String diskProjectId)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {

    // 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 `snapshotsClient.close()` method on the client to safely
    // clean up any remaining background resources.
    try (SnapshotsClient snapshotsClient = SnapshotsClient.create()) {

      if (zone.isEmpty() && region.isEmpty()) {
        throw new Error("You need to specify 'zone' or 'region' for this function to work");
      }

      if (!zone.isEmpty() && !region.isEmpty()) {
        throw new Error("You can't set both 'zone' and 'region' parameters");
      }

      // If Disk's project id is not specified, then the projectId parameter will be used.
      if (diskProjectId.isEmpty()) {
        diskProjectId = projectId;
      }

      // If zone is not empty, use the DisksClient to create a disk.
      // Else, use the RegionDisksClient.
      Disk disk;
      if (!zone.isEmpty()) {
        DisksClient disksClient = DisksClient.create();
        disk = disksClient.get(projectId, zone, diskName);
      } else {
        RegionDisksClient regionDisksClient = RegionDisksClient.create();
        disk = regionDisksClient.get(diskProjectId, region, diskName);
      }

      // Set the snapshot properties.
      Snapshot snapshotResource;
      if (!location.isEmpty()) {
        snapshotResource = Snapshot.newBuilder()
            .setName(snapshotName)
            .setSourceDisk(disk.getSelfLink())
            .addStorageLocations(location)
            .build();
      } else {
        snapshotResource = Snapshot.newBuilder()
            .setName(snapshotName)
            .setSourceDisk(disk.getSelfLink())
            .build();
      }

      // Wait for the operation to complete.
      Operation operation = snapshotsClient.insertAsync(projectId, snapshotResource)
          .get(3, TimeUnit.MINUTES);

      if (operation.hasError()) {
        System.out.println("Snapshot creation failed!" + operation);
        return;
      }

      // Retrieve the created snapshot.
      Snapshot snapshot = snapshotsClient.get(projectId, snapshotName);
      System.out.printf("Snapshot created: %s", snapshot.getName());

    }
  }
}

  4. Supprimez votre VM de la zone source.

    compute/cloud-client/src/main/java/compute/DeleteInstance.java 
    
import com.google.api.gax.longrunning.OperationFuture;
import com.google.cloud.compute.v1.DeleteInstanceRequest;
import com.google.cloud.compute.v1.InstancesClient;
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 DeleteInstance {

  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";
    deleteInstance(project, zone, instanceName);
  }

  // Delete the instance specified by `instanceName`
  // if it's present in the given project and zone.
  public static void deleteInstance(String project, String zone, String instanceName)
      throws IOException, InterruptedException, ExecutionException, TimeoutException {
    // 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()) {

      System.out.printf("Deleting instance: %s ", instanceName);

      // Describe which instance is to be deleted.
      DeleteInstanceRequest deleteInstanceRequest = DeleteInstanceRequest.newBuilder()
          .setProject(project)
          .setZone(zone)
          .setInstance(instanceName).build();

      OperationFuture<Operation, Operation> operation = instancesClient.deleteAsync(
          deleteInstanceRequest);
      // Wait for the operation to complete.
      Operation response = operation.get(3, TimeUnit.MINUTES);

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

  5. Créez ensuite un autre instantané du disque de démarrage et du disque de données.

    compute/cloud-client/src/main/java/compute/disks/CreateSnapshot.java 
    
import com.google.cloud.compute.v1.Disk;
import com.google.cloud.compute.v1.DisksClient;
import com.google.cloud.compute.v1.Operation;
import com.google.cloud.compute.v1.RegionDisksClient;
import com.google.cloud.compute.v1.Snapshot;
import com.google.cloud.compute.v1.SnapshotsClient;
import java.io.IOException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class CreateSnapshot {

  public static void main(String[] args)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {
    // TODO(developer): Replace these variables before running the sample.
    // You need to pass `zone` or `region` parameter relevant to the disk you want to
    // snapshot, but not both. Pass `zone` parameter for zonal disks and `region` for
    // regional disks.

    // Project ID or project number of the Cloud project you want to use.
    String projectId = "YOUR_PROJECT_ID";

    // Name of the disk you want to create.
    String diskName = "YOUR_DISK_NAME";

    // Name of the snapshot that you want to create.
    String snapshotName = "YOUR_SNAPSHOT_NAME";

    // The zone of the source disk from which you create the snapshot (for zonal disks).
    String zone = "europe-central2-b";

    // The region of the source disk from which you create the snapshot (for regional disks).
    String region = "your-disk-region";

    // The Cloud Storage multi-region or the Cloud Storage region where you
    // want to store your snapshot.
    // You can specify only one storage location. Available locations:
    // https://cloud.google.com/storage/docs/locations#available-locations
    String location = "europe-central2";

    // Project ID or project number of the Cloud project that
    // hosts the disk you want to snapshot. If not provided, the value will be defaulted
    // to 'projectId' value.
    String diskProjectId = "YOUR_DISK_PROJECT_ID";

    createSnapshot(projectId, diskName, snapshotName, zone, region, location, diskProjectId);
  }

  // Creates a snapshot of a disk.
  public static void createSnapshot(String projectId, String diskName, String snapshotName,
      String zone, String region, String location, String diskProjectId)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {

    // 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 `snapshotsClient.close()` method on the client to safely
    // clean up any remaining background resources.
    try (SnapshotsClient snapshotsClient = SnapshotsClient.create()) {

      if (zone.isEmpty() && region.isEmpty()) {
        throw new Error("You need to specify 'zone' or 'region' for this function to work");
      }

      if (!zone.isEmpty() && !region.isEmpty()) {
        throw new Error("You can't set both 'zone' and 'region' parameters");
      }

      // If Disk's project id is not specified, then the projectId parameter will be used.
      if (diskProjectId.isEmpty()) {
        diskProjectId = projectId;
      }

      // If zone is not empty, use the DisksClient to create a disk.
      // Else, use the RegionDisksClient.
      Disk disk;
      if (!zone.isEmpty()) {
        DisksClient disksClient = DisksClient.create();
        disk = disksClient.get(projectId, zone, diskName);
      } else {
        RegionDisksClient regionDisksClient = RegionDisksClient.create();
        disk = regionDisksClient.get(diskProjectId, region, diskName);
      }

      // Set the snapshot properties.
      Snapshot snapshotResource;
      if (!location.isEmpty()) {
        snapshotResource = Snapshot.newBuilder()
            .setName(snapshotName)
            .setSourceDisk(disk.getSelfLink())
            .addStorageLocations(location)
            .build();
      } else {
        snapshotResource = Snapshot.newBuilder()
            .setName(snapshotName)
            .setSourceDisk(disk.getSelfLink())
            .build();
      }

      // Wait for the operation to complete.
      Operation operation = snapshotsClient.insertAsync(projectId, snapshotResource)
          .get(3, TimeUnit.MINUTES);

      if (operation.hasError()) {
        System.out.println("Snapshot creation failed!" + operation);
        return;
      }

      // Retrieve the created snapshot.
      Snapshot snapshot = snapshotsClient.get(projectId, snapshotName);
      System.out.printf("Snapshot created: %s", snapshot.getName());

    }
  }
}

  6. (Facultatif) Supprimez vos disques persistants.

    Si vous prévoyez de réutiliser les noms des disques persistants pour les nouveaux disques, vous devez supprimer les disques existants afin de libérer les noms. Cette suppression permet également de réduire les coûts de stockage sur disque persistant.

    Si vous n'envisagez pas de réutiliser les mêmes noms de disques, il n'est pas nécessaire de les supprimer.

    compute/cloud-client/src/main/java/compute/disks/DeleteDisk.java 
    
import com.google.cloud.compute.v1.DeleteDiskRequest;
import com.google.cloud.compute.v1.DisksClient;
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 DeleteDisk {

  public static void main(String[] args)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {
    // TODO(developer): Replace these variables before running the sample.

    // Project ID or project number of the Cloud project you want to use.
    String projectId = "YOUR_PROJECT_ID";

    // The zone from where you want to delete the disk.
    String zone = "europe-central2-b";

    // Name of the disk you want to delete.
    String diskName = "YOUR_DISK_NAME";

    deleteDisk(projectId, zone, diskName);
  }

  // Deletes a disk from a project.
  public static void deleteDisk(String projectId, String zone, String diskName)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {

    // 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 `disksClient.close()` method on the client to safely
    // clean up any remaining background resources.
    try (DisksClient disksClient = DisksClient.create()) {

      // Create the request object.
      DeleteDiskRequest deleteDiskRequest = DeleteDiskRequest.newBuilder()
          .setProject(projectId)
          .setZone(zone)
          .setDisk(diskName)
          .build();

      // Wait for the delete disk operation to complete.
      Operation response = disksClient.deleteAsync(deleteDiskRequest)
          .get(3, TimeUnit.MINUTES);

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

  7. Créez des disques persistants dans la zone de destination à partir des instantanés que vous avez créés. Commencez par créer le disque de démarrage, puis les disques de données.

    compute/cloud-client/src/main/java/compute/disks/CreateDiskFromSnapshot.java 
    
import com.google.cloud.compute.v1.Disk;
import com.google.cloud.compute.v1.DisksClient;
import com.google.cloud.compute.v1.InsertDiskRequest;
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 CreateDiskFromSnapshot {

  public static void main(String[] args)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {
    // TODO(developer): Replace these variables before running the sample.

    // Project ID or project number of the Cloud project you want to use.
    String projectId = "YOUR_PROJECT_ID";

    // Name of the zone in which you want to create the disk.
    String zone = "europe-central2-b";

    // Name of the disk you want to create.
    String diskName = "YOUR_DISK_NAME";

    // 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"
    String diskType = String.format("zones/%s/diskTypes/pd-ssd", zone);

    // Size of the new disk in gigabytes.
    long diskSizeGb = 10;

    // The full path and name of the snapshot that you want to use as the source for the new disk.
    // This value uses the following format:
    // "projects/{projectName}/global/snapshots/{snapshotName}"
    String snapshotLink = String.format("projects/%s/global/snapshots/%s", projectId,
        "SNAPSHOT_NAME");

    createDiskFromSnapshot(projectId, zone, diskName, diskType, diskSizeGb, snapshotLink);
  }

  // Creates a new disk in a project in given zone, using a snapshot.
  public static void createDiskFromSnapshot(String projectId, String zone, String diskName,
      String diskType, long diskSizeGb, String snapshotLink)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {

    // 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 `disksClient.close()` method on the client to safely
    // clean up any remaining background resources.
    try (DisksClient disksClient = DisksClient.create()) {

      // Set the disk properties and the source snapshot.
      Disk disk = Disk.newBuilder()
          .setName(diskName)
          .setZone(zone)
          .setSizeGb(diskSizeGb)
          .setType(diskType)
          .setSourceSnapshot(snapshotLink)
          .build();

      // Create the insert disk request.
      InsertDiskRequest insertDiskRequest = InsertDiskRequest.newBuilder()
          .setProject(projectId)
          .setZone(zone)
          .setDiskResource(disk)
          .build();

      // Wait for the create disk operation to complete.
      Operation response = disksClient.insertAsync(insertDiskRequest)
          .get(3, TimeUnit.MINUTES);

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

  8. Recréez votre VM avec les nouveaux disques dans la zone de destination.

    compute/cloud-client/src/main/java/compute/CreateInstanceWithExistingDisks.java 
    
import com.google.cloud.compute.v1.AttachedDisk;
import com.google.cloud.compute.v1.Disk;
import com.google.cloud.compute.v1.DisksClient;
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.ArrayList;
import java.util.List;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class CreateInstanceWithExistingDisks {

  public static void main(String[] args)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {
    // TODO(developer): Replace these variables before running the sample.

    // Project ID or project number of the Cloud project you want to use.
    String projectId = "YOUR_PROJECT_ID";

    // Name of the zone to create the instance in. For example: "us-west3-b"
    String zone = "europe-central2-b";

    // Name of the new virtual machine (VM) instance.
    String instanceName = "YOUR_INSTANCE_NAME";

    // Array of disk names to be attached to the new virtual machine.
    // First disk in this list will be used as the boot disk.
    List<String> diskNames = List.of("your-boot-disk", "another-disk1", "another-disk2");

    createInstanceWithExistingDisks(projectId, zone, instanceName, diskNames);
  }

  // Create a new VM instance using the selected disks.
  // The first disk in diskNames will be used as the boot disk.
  public static void createInstanceWithExistingDisks(String projectId, String zone,
      String instanceName, List<String> diskNames)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {

    // 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();
        DisksClient disksClient = DisksClient.create()) {

      if (diskNames.size() == 0) {
        throw new Error("At least one disk should be provided");
      }

      // Create the list of attached disks to be used in instance creation.
      List<AttachedDisk> attachedDisks = new ArrayList<>();
      for (int i = 0; i < diskNames.size(); i++) {
        String diskName = diskNames.get(i);
        Disk disk = disksClient.get(projectId, zone, diskName);
        AttachedDisk attDisk = null;

        if (i == 0) {
          // Make the first disk in the list as the boot disk.
          attDisk = AttachedDisk.newBuilder()
              .setSource(disk.getSelfLink())
              .setBoot(true)
              .build();
        } else {
          attDisk = AttachedDisk.newBuilder()
              .setSource(disk.getSelfLink())
              .build();
        }
        attachedDisks.add(attDisk);
      }

      // Create the instance.
      Instance instance = Instance.newBuilder()
          .setName(instanceName)
          // Add the attached disks to the instance.
          .addAllDisks(attachedDisks)
          .setMachineType(String.format("zones/%s/machineTypes/n1-standard-1", zone))
          .addNetworkInterfaces(
              NetworkInterface.newBuilder().setName("global/networks/default").build())
          .build();

      // Create the insert instance request.
      InsertInstanceRequest insertInstanceRequest = InsertInstanceRequest.newBuilder()
          .setProject(projectId)
          .setZone(zone)
          .setInstanceResource(instance)
          .build();

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

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

    }
  }
}

  9. (Facultatif) Supprimez les instantanés de disque temporaires. Après avoir confirmé le déplacement de vos machines virtuelles, supprimez les instantanés temporaires que vous avez créés afin de réduire les coûts de stockage.

    compute/cloud-client/src/main/java/compute/disks/DeleteSnapshot.java 
    
import com.google.cloud.compute.v1.Operation;
import com.google.cloud.compute.v1.SnapshotsClient;
import java.io.IOException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class DeleteSnapshot {

  public static void main(String[] args)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {
    // TODO(developer): Replace these variables before running the sample.

    // Project ID or project number of the Cloud project you want to use.
    String projectId = "YOUR_PROJECT_ID";

    // Name of the snapshot to be deleted.
    String snapshotName = "YOUR_SNAPSHOT_NAME";

    deleteSnapshot(projectId, snapshotName);
  }

  // Delete a snapshot of a disk.
  public static void deleteSnapshot(String projectId, String snapshotName)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {

    // 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 `snapshotsClient.close()` method on the client to safely
    // clean up any remaining background resources.
    try (SnapshotsClient snapshotsClient = SnapshotsClient.create()) {

      Operation operation = snapshotsClient.deleteAsync(projectId, snapshotName)
          .get(3, TimeUnit.MINUTES);

      if (operation.hasError()) {
        System.out.println("Snapshot deletion failed!" + operation);
        return;
      }

      System.out.println("Snapshot deleted!");
    }
  }
}

Node.js

  1. Obtenez des informations sur la VM et identifiez les disques qui lui sont associés.

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

async function getInstance() {
  const instancesClient = new compute.InstancesClient();

  const [instance] = await instancesClient.get({
    project: projectId,
    zone,
    instance: instanceName,
  });

  console.log(
    `Instance ${instanceName} data:\n${JSON.stringify(instance, null, 4)}`
  );
}
getInstance();

  2. Définissez l'état de suppression automatique du disque de démarrage et du disque de données sur false pour vous assurer de conserver les disques lors de la suppression de la VM.

    compute/disks/setDiskAutodelete.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 diskName = 'YOUR_DISK_NAME';
// const autoDelete = true;

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

async function setDiskAutodelete() {
  const instancesClient = new compute.InstancesClient();

  const [instance] = await instancesClient.get({
    project: projectId,
    zone,
    instance: instanceName,
  });

  if (!instance.disks.some(disk => disk.deviceName === diskName)) {
    throw new Error(
      `Instance ${instanceName} doesn't have a disk named ${diskName} attached.`
    );
  }

  const [response] = await instancesClient.setDiskAutoDelete({
    project: projectId,
    zone,
    instance: instanceName,
    deviceName: diskName,
    autoDelete,
  });
  let operation = response.latestResponse;
  const operationsClient = new compute.ZoneOperationsClient();

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

  console.log('Disk autoDelete field updated.');
}

setDiskAutodelete();

  3. Créez des sauvegardes de vos données à l'aide d'instantanés de disque persistant.

    Par précaution, sauvegardez vos données pendant que les disques persistants sont associés à la VM, en utilisant des instantanés de disque persistant. Avant de prendre un instantané, assurez-vous qu'il est cohérent avec l'état du disque persistant en respectant les bonnes pratiques concernant les instantanés.

    Après avoir effacé les tampons de votre disque, créez les instantanés :

    compute/snapshots/createSnapshot.js 
    /**
 * TODO(developer): Uncomment and replace these variables before running the sample.
 */
// const projectId = 'YOUR_PROJECT_ID';
// const diskName = 'YOUR_DISK_NAME';
// const snapshotName = 'YOUR_SNAPSHOT_NAME';
// const zone = 'europe-central2-b';
// const region = '';
// const location = 'europe-central2';
// let diskProjectId = 'YOUR_DISK_PROJECT_ID';

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

async function createSnapshot() {
  const snapshotsClient = new compute.SnapshotsClient();

  let disk;

  if (!zone && !region) {
    throw new Error(
      'You need to specify `zone` or `region` for this function to work.'
    );
  }

  if (zone && region) {
    throw new Error("You can't set both `zone` and `region` parameters");
  }

  if (!diskProjectId) {
    diskProjectId = projectId;
  }

  if (zone) {
    const disksClient = new compute.DisksClient();
    [disk] = await disksClient.get({
      project: diskProjectId,
      zone,
      disk: diskName,
    });
  } else {
    const regionDisksClient = new compute.RegionDisksClient();
    [disk] = await regionDisksClient.get({
      project: diskProjectId,
      region,
      disk: diskName,
    });
  }

  const snapshotResource = {
    name: snapshotName,
    sourceDisk: disk.selfLink,
  };

  if (location) {
    snapshotResource.storageLocations = [location];
  }

  const [response] = await snapshotsClient.insert({
    project: projectId,
    snapshotResource,
  });
  let operation = response.latestResponse;
  const operationsClient = new compute.GlobalOperationsClient();

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

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

createSnapshot();

  4. Supprimez votre VM de la zone source.

    compute/deleteInstance.js 
    /**
 * TODO(developer): Uncomment these variables before running the sample.
 */
// const projectId = 'YOUR_PROJECT_ID';
// const zone = 'europe-central2-b'
// const instanceName = 'YOUR_INSTANCE_NAME';

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

// Delete the instance specified by `instanceName` if it's present in the given project and zone.
async function deleteInstance() {
  const instancesClient = new compute.InstancesClient();

  console.log(`Deleting ${instanceName} from ${zone}...`);

  const [response] = await instancesClient.delete({
    project: projectId,
    zone,
    instance: instanceName,
  });
  let operation = response.latestResponse;
  const operationsClient = new compute.ZoneOperationsClient();

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

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

deleteInstance();

  5. Créez ensuite un autre instantané du disque de démarrage et du disque de données.

    compute/snapshots/createSnapshot.js 
    /**
 * TODO(developer): Uncomment and replace these variables before running the sample.
 */
// const projectId = 'YOUR_PROJECT_ID';
// const diskName = 'YOUR_DISK_NAME';
// const snapshotName = 'YOUR_SNAPSHOT_NAME';
// const zone = 'europe-central2-b';
// const region = '';
// const location = 'europe-central2';
// let diskProjectId = 'YOUR_DISK_PROJECT_ID';

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

async function createSnapshot() {
  const snapshotsClient = new compute.SnapshotsClient();

  let disk;

  if (!zone && !region) {
    throw new Error(
      'You need to specify `zone` or `region` for this function to work.'
    );
  }

  if (zone && region) {
    throw new Error("You can't set both `zone` and `region` parameters");
  }

  if (!diskProjectId) {
    diskProjectId = projectId;
  }

  if (zone) {
    const disksClient = new compute.DisksClient();
    [disk] = await disksClient.get({
      project: diskProjectId,
      zone,
      disk: diskName,
    });
  } else {
    const regionDisksClient = new compute.RegionDisksClient();
    [disk] = await regionDisksClient.get({
      project: diskProjectId,
      region,
      disk: diskName,
    });
  }

  const snapshotResource = {
    name: snapshotName,
    sourceDisk: disk.selfLink,
  };

  if (location) {
    snapshotResource.storageLocations = [location];
  }

  const [response] = await snapshotsClient.insert({
    project: projectId,
    snapshotResource,
  });
  let operation = response.latestResponse;
  const operationsClient = new compute.GlobalOperationsClient();

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

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

createSnapshot();

  6. (Facultatif) Supprimez vos disques persistants.

    Si vous prévoyez de réutiliser les noms des disques persistants pour les nouveaux disques, vous devez supprimer les disques existants afin de libérer les noms. Cette suppression permet également de réduire les coûts de stockage sur disque persistant.

    Si vous n'envisagez pas de réutiliser les mêmes noms de disques, il n'est pas nécessaire de les supprimer.

    compute/disks/deleteDisk.js 
    /**
 * TODO(developer): Uncomment and replace these variables before running the sample.
 */
// const projectId = 'YOUR_PROJECT_ID';
// const zone = 'europe-central2-b';
// const diskName = 'YOUR_DISK_NAME';

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

async function deleteDisk() {
  const disksClient = new compute.DisksClient();

  const [response] = await disksClient.delete({
    project: projectId,
    zone,
    disk: diskName,
  });
  let operation = response.latestResponse;
  const operationsClient = new compute.ZoneOperationsClient();

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

  console.log('Disk deleted.');
}

deleteDisk();

  7. Créez des disques persistants dans la zone de destination à partir des instantanés que vous avez créés. Commencez par créer le disque de démarrage, puis les disques de données.

    compute/disks/createDiskFromSnapshot.js 
    /**
 * TODO(developer): Uncomment and replace these variables before running the sample.
 */
// const projectId = 'YOUR_PROJECT_ID';
// const zone = 'europe-central2-b';
// const diskName = 'YOUR_DISK_NAME';
// const diskType = 'zones/us-west3-b/diskTypes/pd-ssd';
// const diskSizeGb = 10;
// const snapshotLink = 'projects/project_name/global/snapshots/snapshot_name';

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

async function createDiskFromSnapshot() {
  const disksClient = new compute.DisksClient();

  const [response] = await disksClient.insert({
    project: projectId,
    zone,
    diskResource: {
      sizeGb: diskSizeGb,
      name: diskName,
      zone,
      type: diskType,
      sourceSnapshot: snapshotLink,
    },
  });
  let operation = response.latestResponse;
  const operationsClient = new compute.ZoneOperationsClient();

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

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

createDiskFromSnapshot();

  8. Recréez votre VM avec les nouveaux disques dans la zone de destination.

    compute/instances/create-start-instance/createInstanceWithExistingDisks.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 diskNames = ['boot_disk', 'disk1', 'disk2'];

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

async function createWithExistingDisks() {
  const instancesClient = new compute.InstancesClient();
  const disksClient = new compute.DisksClient();

  if (diskNames.length < 1) {
    throw new Error('At least one disk should be provided');
  }

  const disks = [];
  for (const diskName of diskNames) {
    const [disk] = await disksClient.get({
      project: projectId,
      zone,
      disk: diskName,
    });
    disks.push(disk);
  }

  const attachedDisks = [];

  for (const disk of disks) {
    attachedDisks.push({
      source: disk.selfLink,
    });
  }

  attachedDisks[0].boot = true;

  const [response] = await instancesClient.insert({
    project: projectId,
    zone,
    instanceResource: {
      name: instanceName,
      disks: attachedDisks,
      machineType: `zones/${zone}/machineTypes/n1-standard-1`,
      networkInterfaces: [
        {
          name: 'global/networks/default',
        },
      ],
    },
  });
  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.');
}

createWithExistingDisks();

  9. (Facultatif) Supprimez les instantanés de disque temporaires. Après avoir confirmé le déplacement de vos machines virtuelles, supprimez les instantanés temporaires que vous avez créés afin de réduire les coûts de stockage.

    compute/snapshots/deleteSnapshot.js 
    /**
 * TODO(developer): Uncomment and replace these variables before running the sample.
 */
// const projectId = 'YOUR_PROJECT_ID';
// const snapshotName = 'YOUR_SNAPSHOT_NAME';

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

async function deleteSnapshot() {
  const snapshotsClient = new compute.SnapshotsClient();

  const [response] = await snapshotsClient.delete({
    project: projectId,
    snapshot: snapshotName,
  });
  let operation = response.latestResponse;
  const operationsClient = new compute.GlobalOperationsClient();

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

  console.log('Snapshot deleted.');
}

deleteSnapshot();

Python

  1. Obtenez des informations sur la VM et identifiez les disques qui lui sont associés.

    compute/client_library/snippets/instances/get.py 
    from google.cloud import compute_v1

def get_instance(project_id: str, zone: str, instance_name: str) -> compute_v1.Instance:
    """
    Get information about a VM instance in the given zone in the specified project.

    Args:
        project_id: project ID or project number of the Cloud project you want to use.
        zone: name of the zone you want to use. For example: “us-west3-b”
        instance_name: name of the VM instance you want to query.
    Returns:
        An Instance object.
    """
    instance_client = compute_v1.InstancesClient()
    instance = instance_client.get(
        project=project_id, zone=zone, instance=instance_name
    )

    return instance

  2. Définissez l'état de suppression automatique du disque de démarrage et du disque de données sur false pour vous assurer de conserver les disques lors de la suppression de la VM.

    compute/client_library/snippets/disks/autodelete_change.py 
    from __future__ import annotations

import sys
from typing import Any

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

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 set_disk_autodelete(
    project_id: str, zone: str, instance_name: str, disk_name: str, autodelete: bool
) -> None:
    """
    Set the autodelete flag of a disk to given value.

    Args:
        project_id: project ID or project number of the Cloud project you want to use.
        zone: name of the zone in which is the disk you want to modify.
        instance_name: name of the instance the disk is attached to.
        disk_name: the name of the disk which flag you want to modify.
        autodelete: the new value of the autodelete flag.
    """
    instance_client = compute_v1.InstancesClient()
    instance = instance_client.get(
        project=project_id, zone=zone, instance=instance_name
    )

    for disk in instance.disks:
        if disk.device_name == disk_name:
            break
    else:
        raise RuntimeError(
            f"Instance {instance_name} doesn't have a disk named {disk_name} attached."
        )

    disk.auto_delete = autodelete

    operation = instance_client.update(
        project=project_id,
        zone=zone,
        instance=instance_name,
        instance_resource=instance,
    )

    wait_for_extended_operation(operation, "disk update")

  3. Créez des sauvegardes de vos données à l'aide d'instantanés de disque persistant.

    Par précaution, sauvegardez vos données pendant que les disques persistants sont associés à la VM, en utilisant des instantanés de disque persistant. Avant de prendre un instantané, assurez-vous qu'il est cohérent avec l'état du disque persistant en respectant les bonnes pratiques concernant les instantanés.

    Après avoir effacé les tampons de votre disque, créez les instantanés :

    compute/client_library/snippets/snapshots/create.py 
    from __future__ import annotations

import sys
from typing import Any

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

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_snapshot(
    project_id: str,
    disk_name: str,
    snapshot_name: str,
    *,
    zone: str | None = None,
    region: str | None = None,
    location: str | None = None,
    disk_project_id: str | None = None,
) -> compute_v1.Snapshot:
    """
    Create a snapshot of a disk.

    You need to pass `zone` or `region` parameter relevant to the disk you want to
    snapshot, but not both. Pass `zone` parameter for zonal disks and `region` for
    regional disks.

    Args:
        project_id: project ID or project number of the Cloud project you want
            to use to store the snapshot.
        disk_name: name of the disk you want to snapshot.
        snapshot_name: name of the snapshot to be created.
        zone: name of the zone in which is the disk you want to snapshot (for zonal disks).
        region: name of the region in which is the disk you want to snapshot (for regional disks).
        location: The Cloud Storage multi-region or the Cloud Storage region where you
            want to store your snapshot.
            You can specify only one storage location. Available locations:
            https://cloud.google.com/storage/docs/locations#available-locations
        disk_project_id: project ID or project number of the Cloud project that
            hosts the disk you want to snapshot. If not provided, will look for
            the disk in the `project_id` project.

    Returns:
        The new snapshot instance.
    """
    if zone is None and region is None:
        raise RuntimeError(
            "You need to specify `zone` or `region` for this function to work."
        )
    if zone is not None and region is not None:
        raise RuntimeError("You can't set both `zone` and `region` parameters.")

    if disk_project_id is None:
        disk_project_id = project_id

    if zone is not None:
        disk_client = compute_v1.DisksClient()
        disk = disk_client.get(project=disk_project_id, zone=zone, disk=disk_name)
    else:
        regio_disk_client = compute_v1.RegionDisksClient()
        disk = regio_disk_client.get(
            project=disk_project_id, region=region, disk=disk_name
        )

    snapshot = compute_v1.Snapshot()
    snapshot.source_disk = disk.self_link
    snapshot.name = snapshot_name
    if location:
        snapshot.storage_locations = [location]

    snapshot_client = compute_v1.SnapshotsClient()
    operation = snapshot_client.insert(project=project_id, snapshot_resource=snapshot)

    wait_for_extended_operation(operation, "snapshot creation")

    return snapshot_client.get(project=project_id, snapshot=snapshot_name)

  4. Supprimez votre VM de la zone source.

    compute/client_library/snippets/instances/delete.py 
    from __future__ import annotations

import sys
from typing import Any

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

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 delete_instance(project_id: str, zone: str, machine_name: str) -> None:
    """
    Send an instance deletion 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 you want to use. For example: “us-west3-b”
        machine_name: name of the machine you want to delete.
    """
    instance_client = compute_v1.InstancesClient()

    print(f"Deleting {machine_name} from {zone}...")
    operation = instance_client.delete(
        project=project_id, zone=zone, instance=machine_name
    )
    wait_for_extended_operation(operation, "instance deletion")
    print(f"Instance {machine_name} deleted.")

  5. Créez ensuite un autre instantané du disque de démarrage et du disque de données.

    compute/client_library/snippets/snapshots/create.py 
    from __future__ import annotations

import sys
from typing import Any

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

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_snapshot(
    project_id: str,
    disk_name: str,
    snapshot_name: str,
    *,
    zone: str | None = None,
    region: str | None = None,
    location: str | None = None,
    disk_project_id: str | None = None,
) -> compute_v1.Snapshot:
    """
    Create a snapshot of a disk.

    You need to pass `zone` or `region` parameter relevant to the disk you want to
    snapshot, but not both. Pass `zone` parameter for zonal disks and `region` for
    regional disks.

    Args:
        project_id: project ID or project number of the Cloud project you want
            to use to store the snapshot.
        disk_name: name of the disk you want to snapshot.
        snapshot_name: name of the snapshot to be created.
        zone: name of the zone in which is the disk you want to snapshot (for zonal disks).
        region: name of the region in which is the disk you want to snapshot (for regional disks).
        location: The Cloud Storage multi-region or the Cloud Storage region where you
            want to store your snapshot.
            You can specify only one storage location. Available locations:
            https://cloud.google.com/storage/docs/locations#available-locations
        disk_project_id: project ID or project number of the Cloud project that
            hosts the disk you want to snapshot. If not provided, will look for
            the disk in the `project_id` project.

    Returns:
        The new snapshot instance.
    """
    if zone is None and region is None:
        raise RuntimeError(
            "You need to specify `zone` or `region` for this function to work."
        )
    if zone is not None and region is not None:
        raise RuntimeError("You can't set both `zone` and `region` parameters.")

    if disk_project_id is None:
        disk_project_id = project_id

    if zone is not None:
        disk_client = compute_v1.DisksClient()
        disk = disk_client.get(project=disk_project_id, zone=zone, disk=disk_name)
    else:
        regio_disk_client = compute_v1.RegionDisksClient()
        disk = regio_disk_client.get(
            project=disk_project_id, region=region, disk=disk_name
        )

    snapshot = compute_v1.Snapshot()
    snapshot.source_disk = disk.self_link
    snapshot.name = snapshot_name
    if location:
        snapshot.storage_locations = [location]

    snapshot_client = compute_v1.SnapshotsClient()
    operation = snapshot_client.insert(project=project_id, snapshot_resource=snapshot)

    wait_for_extended_operation(operation, "snapshot creation")

    return snapshot_client.get(project=project_id, snapshot=snapshot_name)

  6. (Facultatif) Supprimez vos disques persistants.

    Si vous prévoyez de réutiliser les noms des disques persistants pour les nouveaux disques, vous devez supprimer les disques existants afin de libérer les noms. Cette suppression permet également de réduire les coûts de stockage sur disque persistant.

    Si vous n'envisagez pas de réutiliser les mêmes noms de disques, il n'est pas nécessaire de les supprimer.

    compute/client_library/snippets/disks/delete.py 
    from __future__ import annotations

import sys
from typing import Any

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

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 delete_disk(project_id: str, zone: str, disk_name: str) -> None:
    """
    Deletes a disk from a project.

    Args:
        project_id: project ID or project number of the Cloud project you want to use.
        zone: name of the zone in which is the disk you want to delete.
        disk_name: name of the disk you want to delete.
    """
    disk_client = compute_v1.DisksClient()
    operation = disk_client.delete(project=project_id, zone=zone, disk=disk_name)
    wait_for_extended_operation(operation, "disk deletion")

  7. Créez des disques persistants dans la zone de destination à partir des instantanés que vous avez créés. Commencez par créer le disque de démarrage, puis les disques de données.

    compute/client_library/snippets/disks/create_from_snapshot.py 
    from __future__ import annotations

import sys
from typing import Any

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

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_disk_from_snapshot(
    project_id: str,
    zone: str,
    disk_name: str,
    disk_type: str,
    disk_size_gb: int,
    snapshot_link: str,
) -> compute_v1.Disk:
    """
    Creates a new disk in a project in given zone.

    Args:
        project_id: project ID or project number of the Cloud project you want to use.
        zone: name of the zone in which you want to create the disk.
        disk_name: name of the disk you want to create.
        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
        snapshot_link: a link to the snapshot you want to use as a source for the new disk.
            This value uses the following format: "projects/{project_name}/global/snapshots/{snapshot_name}"

    Returns:
        An unattached Disk instance.
    """
    disk_client = compute_v1.DisksClient()
    disk = compute_v1.Disk()
    disk.zone = zone
    disk.size_gb = disk_size_gb
    disk.source_snapshot = snapshot_link
    disk.type_ = disk_type
    disk.name = disk_name
    operation = disk_client.insert(project=project_id, zone=zone, disk_resource=disk)

    wait_for_extended_operation(operation, "disk creation")

    return disk_client.get(project=project_id, zone=zone, disk=disk_name)

  8. Recréez votre VM avec les nouveaux disques dans la zone de destination.

    compute/client_library/snippets/instances/create_start_instance/create_with_existing_disks.py 
    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_disk(project_id: str, zone: str, disk_name: str) -> compute_v1.Disk:
    """
    Gets a disk from a project.

    Args:
        project_id: project ID or project number of the Cloud project you want to use.
        zone: name of the zone where the disk exists.
        disk_name: name of the disk you want to retrieve.
    """
    disk_client = compute_v1.DisksClient()
    return disk_client.get(project=project_id, zone=zone, disk=disk_name)

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)

def create_with_existing_disks(
    project_id: str, zone: str, instance_name: str, disk_names: list[str]
) -> compute_v1.Instance:
    """
    Create a new VM instance using selected disks. The first disk in disk_names will
    be used as boot disk.

    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.
        disk_names: list of disk names to be attached to the new virtual machine.
            First disk in this list will be used as the boot device.

    Returns:
        Instance object.
    """
    assert len(disk_names) >= 1
    disks = [get_disk(project_id, zone, disk_name) for disk_name in disk_names]
    attached_disks = []
    for disk in disks:
        adisk = compute_v1.AttachedDisk()
        adisk.source = disk.self_link
        attached_disks.append(adisk)
    attached_disks[0].boot = True
    instance = create_instance(project_id, zone, instance_name, attached_disks)
    return instance

  9. (Facultatif) Supprimez les instantanés de disque temporaires. Après avoir confirmé le déplacement de vos machines virtuelles, supprimez les instantanés temporaires que vous avez créés afin de réduire les coûts de stockage.

    compute/client_library/snippets/snapshots/delete.py 
    from __future__ import annotations

import sys
from typing import Any

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

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 delete_snapshot(project_id: str, snapshot_name: str) -> None:
    """
    Delete a snapshot of a disk.

    Args:
        project_id: project ID or project number of the Cloud project you want to use.
        snapshot_name: name of the snapshot to delete.
    """

    snapshot_client = compute_v1.SnapshotsClient()
    operation = snapshot_client.delete(project=project_id, snapshot=snapshot_name)

    wait_for_extended_operation(operation, "snapshot deletion")

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