使用实例模板在指定项目和可用区中创建虚拟机实例。
深入探索
如需查看包含此代码示例的详细文档，请参阅以下内容：
代码示例
Go
试用此示例之前，请按照《Compute Engine 快速入门：使用客户端库》中的 Go 设置说明进行操作。如需了解详情，请参阅 Compute Engine Go API 参考文档。
如需向 Compute Engine 进行身份验证，请设置应用默认凭据。 如需了解详情，请参阅为本地开发环境设置身份验证。
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"
)
// createInstanceFromTemplate creates a Compute Engine VM instance from an instance template.
func createInstanceFromTemplate(w io.Writer, projectID, zone, instanceName, instanceTemplateUrl string) error {
// projectID := "your_project_id"
// zone := "europe-central2-b"
// instanceName := "your_instance_name"
// instanceTemplateUrl := "global/instanceTemplates/your_instance_template"
ctx := context.Background()
instancesClient, err := compute.NewInstancesRESTClient(ctx)
if err != nil {
return fmt.Errorf("NewInstancesRESTClient: %w", err)
}
defer instancesClient.Close()
req := &computepb.InsertInstanceRequest{
Project: projectID,
Zone: zone,
InstanceResource: &computepb.Instance{
Name: proto.String(instanceName),
},
SourceInstanceTemplate: &instanceTemplateUrl,
}
op, err := instancesClient.Insert(ctx, req)
if err != nil {
return fmt.Errorf("unable to create instance: %w", err)
}
if err = op.Wait(ctx); err != nil {
return fmt.Errorf("unable to wait for the operation: %w", err)
}
fmt.Fprintf(w, "Instance created\n")
return nil
}
Java
试用此示例之前，请按照《Compute Engine 快速入门：使用客户端库》中的 Java 设置说明进行操作。如需了解详情，请参阅 Compute Engine Java API 参考文档。
如需向 Compute Engine 进行身份验证，请设置应用默认凭据。 如需了解详情，请参阅为本地开发环境设置身份验证。
import com.google.cloud.compute.v1.AttachedDisk;
import com.google.cloud.compute.v1.AttachedDiskInitializeParams;
import com.google.cloud.compute.v1.InsertInstanceRequest;
import com.google.cloud.compute.v1.Instance;
import com.google.cloud.compute.v1.InstanceProperties;
import com.google.cloud.compute.v1.InstanceTemplate;
import com.google.cloud.compute.v1.InstanceTemplatesClient;
import com.google.cloud.compute.v1.InstancesClient;
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 CreateInstanceFromTemplate {
public static void main(String[] args)
throws IOException, ExecutionException, InterruptedException, TimeoutException {
/* TODO(developer): Replace these variables before running the sample.
projectId - ID or number of the project you want to use.
zone - Name of the zone you want to check, for example: us-west3-b
instanceName - Name of the new instance.
instanceTemplateURL - URL of the instance template using for creating the new instance.
It can be a full or partial URL.
Examples:
- https://www.googleapis.com/compute/v1/projects/project/global/instanceTemplates/example-instance-template
- projects/project/global/instanceTemplates/example-instance-template
- global/instanceTemplates/example-instance-template
*/
String projectId = "your-project-id";
String zone = "zone-name";
String instanceName = "instance-name";
String instanceTemplateUrl = "instance-template-url";
createInstanceFromTemplate(projectId, zone, instanceName, instanceTemplateUrl);
}
// Create a new instance from template in the specified project and zone.
public static void createInstanceFromTemplate(String projectId, String zone, String instanceName,
String instanceTemplateName)
throws IOException, ExecutionException, InterruptedException, TimeoutException {
try (InstancesClient instancesClient = InstancesClient.create();
InstanceTemplatesClient instanceTemplatesClient = InstanceTemplatesClient.create()) {
InstanceTemplate instanceTemplate = instanceTemplatesClient.get(projectId,
instanceTemplateName);
// Adjust diskType field of the instance template to use the URL formatting
// required by instances.insert.diskType
// For instance template, there is only a name, not URL.
List<AttachedDisk> reformattedAttachedDisks = new ArrayList<>();
for (AttachedDisk disk : instanceTemplate.getProperties().getDisksList()) {
disk = AttachedDisk.newBuilder(disk)
.setInitializeParams(AttachedDiskInitializeParams
.newBuilder(disk.getInitializeParams())
.setDiskType(
String.format(
"zones/%s/diskTypes/%s", zone, disk.getInitializeParams().getDiskType()))
.build())
.build();
reformattedAttachedDisks.add(disk);
}
// Clear existing disks and set the reformatted disks in the instance template.
instanceTemplate = InstanceTemplate
.newBuilder(instanceTemplate)
.setProperties(InstanceProperties
.newBuilder(instanceTemplate.getProperties())
.clearDisks()
.addAllDisks(reformattedAttachedDisks)
.build())
.build();
InsertInstanceRequest insertInstanceRequest = InsertInstanceRequest.newBuilder()
.setProject(projectId)
.setZone(zone)
.setInstanceResource(Instance.newBuilder().setName(instanceName).build())
.setSourceInstanceTemplate(instanceTemplate.getSelfLink()).build();
Operation response = instancesClient.insertAsync(insertInstanceRequest)
.get(3, TimeUnit.MINUTES);
if (response.hasError()) {
System.out.println("Instance creation from template failed ! ! " + response);
return;
}
System.out
.printf("Instance creation from template: Operation Status %s: %s ", instanceName,
response.getStatus());
}
}
}Node.js
试用此示例之前，请按照《Compute Engine 快速入门：使用客户端库》中的 Node.js 设置说明进行操作。如需了解详情，请参阅 Compute Engine Node.js API 参考文档。
如需向 Compute Engine 进行身份验证，请设置应用默认凭据。 如需了解详情，请参阅为本地开发环境设置身份验证。
/**
* 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 instanceTemplateUrl = 'YOUR_INSTANCE_TEMPLATE_URL'
const compute = require('@google-cloud/compute');
// Create a new instance from template in the specified project and zone.
async function createInstanceFromTemplate() {
const instancesClient = new compute.InstancesClient();
console.log(
`Creating the ${instanceName} instance in ${zone} from template ${instanceTemplateUrl}...`
);
const [response] = await instancesClient.insert({
project: projectId,
zone,
instanceResource: {
name: instanceName,
},
sourceInstanceTemplate: instanceTemplateUrl,
});
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.');
}
createInstanceFromTemplate();Python
试用此示例之前，请按照《Compute Engine 快速入门：使用客户端库》中的 Python 设置说明进行操作。如需了解详情，请参阅 Compute Engine Python API 参考文档。
如需向 Compute Engine 进行身份验证，请设置应用默认凭据。 如需了解详情，请参阅为本地开发环境设置身份验证。
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_instance_from_template(
project_id: str, zone: str, instance_name: str, instance_template_url: str
) -> compute_v1.Instance:
"""
Creates a Compute Engine VM instance from an instance template.
Args:
project_id: ID or number of the project you want to use.
zone: Name of the zone you want to check, for example: us-west3-b
instance_name: Name of the new instance.
instance_template_url: URL of the instance template used for creating the new instance.
It can be a full or partial URL.
Examples:
- https://www.googleapis.com/compute/v1/projects/project/global/instanceTemplates/example-instance-template
- projects/project/global/instanceTemplates/example-instance-template
- global/instanceTemplates/example-instance-template
Returns:
Instance object.
"""
instance_client = compute_v1.InstancesClient()
instance_insert_request = compute_v1.InsertInstanceRequest()
instance_insert_request.project = project_id
instance_insert_request.zone = zone
instance_insert_request.source_instance_template = instance_template_url
instance_insert_request.instance_resource.name = instance_name
operation = instance_client.insert(instance_insert_request)
wait_for_extended_operation(operation, "instance creation")
return instance_client.get(project=project_id, zone=zone, instance=instance_name)
后续步骤
如需搜索和过滤其他 Google Cloud 产品的代码示例，请参阅 Google Cloud 示例浏览器。