Restore from a snapshot

import(
"context"
"fmt"
"io"
compute"cloud.google.com/go/compute/apiv1"
computepb"cloud.google.com/go/compute/apiv1/computepb"
"google.golang.org/protobuf/proto"
)
// createDiskFromSnapshot creates a new disk in a project in given zone.
funccreateDiskFromSnapshot(
wio.Writer,
projectID,zone,diskName,diskType,snapshotLinkstring,
diskSizeGbint64,
)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)
iferr!=nil{
returnfmt.Errorf("NewDisksRESTClient: %w",err)
}
deferdisksClient.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)
iferr!=nil{
returnfmt.Errorf("unable to create disk: %w",err)
}
iferr=op.Wait(ctx);err!=nil{
returnfmt.Errorf("unable to wait for the operation: %w",err)
}
fmt.Fprintf(w,"Disk created\n")
returnnil
}

importcom.google.cloud.compute.v1.Disk ;
importcom.google.cloud.compute.v1.DisksClient ;
importcom.google.cloud.compute.v1.InsertDiskRequest ;
importcom.google.cloud.compute.v1.Operation ;
importjava.io.IOException;
importjava.util.concurrent.ExecutionException;
importjava.util.concurrent.TimeUnit;
importjava.util.concurrent.TimeoutException;
publicclass CreateDiskFromSnapshot{
publicstaticvoidmain(String[]args)
throwsIOException,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.
StringprojectId="YOUR_PROJECT_ID";
// Name of the zone in which you want to create the disk.
Stringzone="europe-central2-b";
// Name of the disk you want to create.
StringdiskName="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"
StringdiskType=String.format("zones/%s/diskTypes/pd-ssd",zone);
// Size of the new disk in gigabytes.
longdiskSizeGb=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}"
StringsnapshotLink=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.
publicstaticvoidcreateDiskFromSnapshot(StringprojectId,Stringzone,StringdiskName,
StringdiskType,longdiskSizeGb,StringsnapshotLink)
throwsIOException,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 ());
}
}
}

/**
 * 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';
constcompute=require('@google-cloud/compute');
asyncfunctioncreateDiskFromSnapshot(){
constdisksClient=newcompute.DisksClient ();
const[response]=awaitdisksClient.insert({
project:projectId,
zone,
diskResource:{
sizeGb:diskSizeGb,
name:diskName,
zone,
type:diskType,
sourceSnapshot:snapshotLink,
},
});
letoperation=response.latestResponse;
constoperationsClient=newcompute.ZoneOperationsClient ();
// Wait for the create disk operation to complete.
while(operation.status!=='DONE'){
[operation]=awaitoperationsClient.wait({
operation:operation.name,
project:projectId,
zone:operation.zone.split('/').pop(),
});
}
console.log('Disk created.');
}
createDiskFromSnapshot();

from__future__import annotations
importsys
fromtypingimport Any
fromgoogle.api_core.extended_operationimport ExtendedOperation
fromgoogle.cloudimport compute_v1
defwait_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
defcreate_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)

import(
"context"
"fmt"
"io"
compute"cloud.google.com/go/compute/apiv1"
computepb"cloud.google.com/go/compute/apiv1/computepb"
"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.
funccreateWithExistingDisks(
wio.Writer,
projectID,zone,instanceNamestring,
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)
iferr!=nil{
returnfmt.Errorf("NewInstancesRESTClient: %w",err)
}
deferinstancesClient.Close()
disksClient,err:=compute.NewDisksRESTClient (ctx)
iferr!=nil{
returnfmt.Errorf("NewDisksRESTClient: %w",err)
}
deferdisksClient.Close()
disks:=[](*computepb.Disk){}
for_,diskName:=rangediskNames{
reqDisk:=&computepb.GetDiskRequest{
Project:projectID,
Zone:zone,
Disk:diskName,
}
disk,err:=disksClient.Get(ctx,reqDisk)
iferr!=nil{
returnfmt.Errorf("unable to get disk: %w",err)
}
disks=append(disks,disk)
}
attachedDisks:=[](*computepb.AttachedDisk){}
for_,disk:=rangedisks{
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)
iferr!=nil{
returnfmt.Errorf("unable to create instance: %w",err)
}
iferr=op.Wait(ctx);err!=nil{
returnfmt.Errorf("unable to wait for the operation: %w",err)
}
fmt.Fprintf(w,"Instance created\n")
returnnil
}

importcom.google.cloud.compute.v1.AttachedDisk ;
importcom.google.cloud.compute.v1.Disk ;
importcom.google.cloud.compute.v1.DisksClient ;
importcom.google.cloud.compute.v1.InsertInstanceRequest ;
importcom.google.cloud.compute.v1.Instance ;
importcom.google.cloud.compute.v1.InstancesClient ;
importcom.google.cloud.compute.v1.NetworkInterface ;
importcom.google.cloud.compute.v1.Operation ;
importjava.io.IOException;
importjava.util.ArrayList;
importjava.util.List;
importjava.util.concurrent.ExecutionException;
importjava.util.concurrent.TimeUnit;
importjava.util.concurrent.TimeoutException;
publicclass CreateInstanceWithExistingDisks{
publicstaticvoidmain(String[]args)
throwsIOException,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.
StringprojectId="YOUR_PROJECT_ID";
// Name of the zone to create the instance in. For example: "us-west3-b"
Stringzone="europe-central2-b";
// Name of the new virtual machine (VM) instance.
StringinstanceName="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.
publicstaticvoidcreateInstanceWithExistingDisks(StringprojectId,Stringzone,
StringinstanceName,List<String>diskNames)
throwsIOException,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){
thrownewError ("At least one disk should be provided");
}
// Create the list of attached disks to be used in instance creation.
List<AttachedDisk>attachedDisks=newArrayList<>();
for(inti=0;i < diskNames.size();i++){
StringdiskName=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 ());
}
}
}

/**
 * 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'];
constcompute=require('@google-cloud/compute');
asyncfunctioncreateWithExistingDisks(){
constinstancesClient=newcompute.InstancesClient ();
constdisksClient=newcompute.DisksClient ();
if(diskNames.length < 1){
thrownewError('At least one disk should be provided');
}
constdisks=[];
for(constdiskNameofdiskNames){
const[disk]=awaitdisksClient.get({
project:projectId,
zone,
disk:diskName,
});
disks.push(disk);
}
constattachedDisks=[];
for(constdiskofdisks){
attachedDisks.push({
source:disk.selfLink,
});
}
attachedDisks[0].boot=true;
const[response]=awaitinstancesClient.insert({
project:projectId,
zone,
instanceResource:{
name:instanceName,
disks:attachedDisks,
machineType:`zones/${zone}/machineTypes/n1-standard-1`,
networkInterfaces:[
{
name:'global/networks/default',
},
],
},
});
letoperation=response.latestResponse;
constoperationsClient=newcompute.ZoneOperationsClient ();
// Wait for the create operation to complete.
while(operation.status!=='DONE'){
[operation]=awaitoperationsClient.wait({
operation:operation.name,
project:projectId,
zone:operation.zone.split('/').pop(),
});
}
console.log('Instance created.');
}
createWithExistingDisks();

from__future__import annotations
importre
importsys
fromtypingimport Any
importwarnings
fromgoogle.api_core.extended_operationimport ExtendedOperation
fromgoogle.cloudimport compute_v1
defget_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)
defwait_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
defcreate_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)
defcreate_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

import(
"context"
"fmt"
"io"
compute"cloud.google.com/go/compute/apiv1"
computepb"cloud.google.com/go/compute/apiv1/computepb"
"google.golang.org/protobuf/proto"
)
// createInstanceFromSnapshot creates a new VM instance with boot disk created from a snapshot.
funccreateInstanceFromSnapshot(wio.Writer,projectID,zone,instanceName,snapshotLinkstring)error{
// projectID := "your_project_id"
// zone := "europe-central2-b"
// instanceName := "your_instance_name"
// snapshotLink := "projects/project_name/global/snapshots/snapshot_name"
ctx:=context.Background()
instancesClient,err:=compute.NewInstancesRESTClient (ctx)
iferr!=nil{
returnfmt.Errorf("NewInstancesRESTClient: %w",err)
}
deferinstancesClient.Close()
req:=&computepb.InsertInstanceRequest{
Project:projectID,
Zone:zone,
InstanceResource:&computepb.Instance{
Name:proto.String(instanceName),
Disks:[]*computepb.AttachedDisk{
{
InitializeParams:&computepb.AttachedDiskInitializeParams{
DiskSizeGb:proto.Int64(11),
SourceSnapshot:proto.String(snapshotLink),
DiskType:proto.String(fmt.Sprintf("zones/%s/diskTypes/pd-standard",zone)),
},
AutoDelete:proto.Bool(true),
Boot:proto.Bool(true),
Type:proto.String(computepb.AttachedDisk_PERSISTENT .String()),
},
},
MachineType:proto.String(fmt.Sprintf("zones/%s/machineTypes/n1-standard-1",zone)),
NetworkInterfaces:[]*computepb.NetworkInterface{
{
Name:proto.String("global/networks/default"),
},
},
},
}
op,err:=instancesClient.Insert(ctx,req)
iferr!=nil{
returnfmt.Errorf("unable to create instance: %w",err)
}
iferr=op.Wait(ctx);err!=nil{
returnfmt.Errorf("unable to wait for the operation: %w",err)
}
fmt.Fprintf(w,"Instance created\n")
returnnil
}

importcom.google.api.gax.longrunning.OperationFuture ;
importcom.google.cloud.compute.v1.AttachedDisk ;
importcom.google.cloud.compute.v1.AttachedDisk.Type;
importcom.google.cloud.compute.v1.AttachedDiskInitializeParams ;
importcom.google.cloud.compute.v1.Image ;
importcom.google.cloud.compute.v1.ImagesClient ;
importcom.google.cloud.compute.v1.InsertInstanceRequest ;
importcom.google.cloud.compute.v1.Instance ;
importcom.google.cloud.compute.v1.InstancesClient ;
importcom.google.cloud.compute.v1.NetworkInterface ;
importcom.google.cloud.compute.v1.Operation ;
importjava.io.IOException;
importjava.util.Vector;
importjava.util.concurrent.ExecutionException;
importjava.util.concurrent.TimeUnit;
importjava.util.concurrent.TimeoutException;
publicclass CreateInstancesAdvanced{
/**
 * @param diskType 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"
 * @param diskSizeGb size of the new disk in gigabytes
 * @param boot boolean flag indicating whether this disk should be used as a boot disk of an
 * instance
 * @param diskSnapshot disk snapshot to use when creating this disk. You must have read access to
 * this disk. This value uses the following format:
 * "projects/{project_name}/global/snapshots/{snapshot_name}"
 * @return AttachedDisk object configured to be created using the specified snapshot.
 */
privatestaticAttachedDisk diskFromSnapshot(StringdiskType,intdiskSizeGb,booleanboot,
StringdiskSnapshot){
AttachedDisk disk=
AttachedDisk .newBuilder()
.setBoot(boot)
// Remember to set auto_delete to True if you want the disk to be deleted when
// you delete your VM instance.
.setAutoDelete(true)
.setType(Type.PERSISTENT.toString())
.setInitializeParams (
AttachedDiskInitializeParams .newBuilder()
.setSourceSnapshot(diskSnapshot)
.setDiskSizeGb(diskSizeGb)
.setDiskType(diskType)
.build())
.build();
returndisk;
}
/**
 * Send an instance creation request to the Compute Engine API and wait for it to complete.
 *
 * @param project project ID or project number of the Cloud project you want to use.
 * @param zone name of the zone to create the instance in. For example: "us-west3-b"
 * @param instanceName name of the new virtual machine (VM) instance.
 * @param disks a list of compute_v1.AttachedDisk objects describing the disks you want to attach
 * to your new instance.
 * @param machineType 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"
 * @param network 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.
 * @param subnetwork name of the subnetwork you want the new instance to use. This value uses the
 * following format: "regions/{region}/subnetworks/{subnetwork_name}"
 * @return Instance object.
 */
privatestaticInstance createWithDisks(Stringproject,Stringzone,StringinstanceName,
Vector<AttachedDisk>disks,StringmachineType,Stringnetwork,Stringsubnetwork)
throwsIOException,InterruptedException,ExecutionException,TimeoutException{
try(InstancesClient instancesClient=InstancesClient .create()){
// Use the network interface provided in the networkName argument.
NetworkInterface networkInterface;
if(subnetwork!=null){
networkInterface=NetworkInterface .newBuilder()
.setName(network).setSubnetwork(subnetwork)
.build();
}else{
networkInterface=NetworkInterface .newBuilder()
.setName(network).build();
}
machineType=String.format("zones/%s/machineTypes/%s",zone,machineType);
// Bind `instanceName`, `machineType`, `disk`, and `networkInterface` to an instance.
Instance instanceResource=
Instance .newBuilder()
.setName(instanceName)
.setMachineType(machineType)
.addAllDisks(disks)
.addNetworkInterfaces(networkInterface)
.build();
System.out.printf("Creating instance: %s at %s ",instanceName,zone);
// Insert the instance in the specified project and zone.
InsertInstanceRequest insertInstanceRequest=InsertInstanceRequest .newBuilder()
.setProject(project)
.setZone(zone)
.setInstanceResource(instanceResource).build();
OperationFuture<Operation,Operation>operation=instancesClient.insertAsync(
insertInstanceRequest);
// Wait for the operation to complete.
Operation response=operation.get(3,TimeUnit.MINUTES);
if(response.hasError ()){
System.out.println("Instance creation failed ! ! "+response);
returnnull;
}
System.out.println("Operation Status: "+response.getStatus ());
returninstancesClient.get(project,zone,instanceName);
}
}
/**
 * Create a new VM instance with boot disk created from a snapshot.
 *
 * @param project project ID or project number of the Cloud project you want to use.
 * @param zone name of the zone to create the instance in. For example: "us-west3-b"
 * @param instanceName name of the new virtual machine (VM) instance.
 * @param snapshotName link to the snapshot you want to use as the source of your boot disk in the
 * form of: "projects/{project_name}/global/snapshots/{snapshot_name}"
 * @return Instance object.
 */
publicstaticInstance createFromSnapshot(Stringproject,Stringzone,StringinstanceName,
StringsnapshotName)
throwsIOException,InterruptedException,ExecutionException,TimeoutException{
StringdiskType=String.format("zones/%s/diskTypes/pd-standard",zone);
Vector<AttachedDisk>disks=newVector<>();
disks.add(diskFromSnapshot(diskType,11,true,snapshotName));
returncreateWithDisks(project,zone,instanceName,disks,"n1-standard-1",
"global/networks/default",null);
}

/**
 * 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 snapshotLink = 'projects/YOUR_PROJECT/global/snapshots/YOUR_SNAPSHOT_NAME';
constcompute=require('@google-cloud/compute');
// Creates a new VM instance with boot disk created from a snapshot.
asyncfunctioncreateInstanceFromSnapshot(){
constinstancesClient=newcompute.InstancesClient ();
const[response]=awaitinstancesClient.insert({
project:projectId,
zone,
instanceResource:{
name:instanceName,
disks:[
{
initializeParams:{
diskSizeGb:'11',
sourceSnapshot:snapshotLink,
diskType:`zones/${zone}/diskTypes/pd-standard`,
},
autoDelete:true,
boot:true,
type:'PERSISTENT',
},
],
machineType:`zones/${zone}/machineTypes/n1-standard-1`,
networkInterfaces:[
{
name:'global/networks/default',
},
],
},
});
letoperation=response.latestResponse;
constoperationsClient=newcompute.ZoneOperationsClient ();
// Wait for the create operation to complete.
while(operation.status!=='DONE'){
[operation]=awaitoperationsClient.wait({
operation:operation.name,
project:projectId,
zone:operation.zone.split('/').pop(),
});
}
console.log('Instance created.');
}
createInstanceFromSnapshot();

from__future__import annotations
importre
importsys
fromtypingimport Any
importwarnings
fromgoogle.api_core.extended_operationimport ExtendedOperation
fromgoogle.cloudimport compute_v1
defdisk_from_snapshot(
 disk_type: str,
 disk_size_gb: int,
 boot: bool,
 source_snapshot: str,
 auto_delete: bool = True,
) -> compute_v1.AttachedDisk():
"""
 Create an AttachedDisk object to be used in VM instance creation. Uses a disk snapshot as the
 source for the new disk.
 Args:
 disk_type: the type of disk you want to create. This value uses the following format:
 "zones/{zone}/diskTypes/(pd-standard|pd-ssd|pd-balanced|pd-extreme)".
 For example: "zones/us-west3-b/diskTypes/pd-ssd"
 disk_size_gb: size of the new disk in gigabytes
 boot: boolean flag indicating whether this disk should be used as a boot disk of an instance
 source_snapshot: disk snapshot to use when creating this disk. You must have read access to this disk.
 This value uses the following format: "projects/{project_name}/global/snapshots/{snapshot_name}"
 auto_delete: boolean flag indicating whether this disk should be deleted with the VM that uses it
 Returns:
 AttachedDisk object configured to be created using the specified snapshot.
 """
 disk = compute_v1.AttachedDisk()
 initialize_params = compute_v1.AttachedDiskInitializeParams()
 initialize_params.source_snapshot = source_snapshot
 initialize_params.disk_type = disk_type
 initialize_params.disk_size_gb = disk_size_gb
 disk.initialize_params = initialize_params
 # Remember to set auto_delete to True if you want the disk to be deleted when you delete
 # your VM instance.
 disk.auto_delete = auto_delete
 disk.boot = boot
 return disk
defwait_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
defcreate_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)
defcreate_from_snapshot(
 project_id: str, zone: str, instance_name: str, snapshot_link: str
):
"""
 Create a new VM instance with boot disk created from a snapshot. The
 new boot disk will have 20 gigabytes.
 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.
 snapshot_link: link to the snapshot you want to use as the source of your
 boot disk in the form of: "projects/{project_name}/global/snapshots/{snapshot_name}"
 Returns:
 Instance object.
 """
 disk_type = f"zones/{zone}/diskTypes/pd-standard"
 disks = [disk_from_snapshot(disk_type, 20, True, snapshot_link)]
 instance = create_instance(project_id, zone, instance_name, disks)
 return instance