根据现有实例创建实例模板

使用现有虚拟机的配置来创建实例模板。

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如需查看包含此代码示例的详细文档，请参阅以下内容：

创建实例模板

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，请设置应用默认凭证。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 "cloud.google.com/go/compute/apiv1/computepb"
	"google.golang.org/protobuf/proto"
)

// createTemplateFromInstance creates a new instance template based on an existing instance.
// This new template specifies a different boot disk.
func createTemplateFromInstance(w io.Writer, projectID, instance, templateName string) error {
	// projectID := "your_project_id"
	// instance := "projects/project/zones/zone/instances/instance"
	// templateName := "your_template_name"

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

	req := &computepb.InsertInstanceTemplateRequest{
		Project: projectID,
		InstanceTemplateResource: &computepb.InstanceTemplate{
			Name:           proto.String(templateName),
			SourceInstance: proto.String(instance),
			SourceInstanceParams: &computepb.SourceInstanceParams{
				DiskConfigs: []*computepb.DiskInstantiationConfig{
					{
						// Device name must match the name of a disk attached to the instance
						// your template is based on.
						DeviceName: proto.String("disk-1"),
						// Replace the original boot disk image used in your instance with a Rocky Linux image.
						InstantiateFrom: proto.String(computepb.DiskInstantiationConfig_CUSTOM_IMAGE.String()),
						CustomImage:     proto.String("projects/rocky-linux-cloud/global/images/family/rocky-linux-8"),
						// Override the auto_delete setting.
						AutoDelete: proto.Bool(true),
					},
				},
			},
		},
	}

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

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

	fmt.Fprintf(w, "Instance template 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，请设置应用默认凭证。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.DiskInstantiationConfig;
import com.google.cloud.compute.v1.DiskInstantiationConfig.InstantiateFrom;
import com.google.cloud.compute.v1.GlobalOperationsClient;
import com.google.cloud.compute.v1.InsertInstanceTemplateRequest;
import com.google.cloud.compute.v1.InstanceTemplate;
import com.google.cloud.compute.v1.InstanceTemplatesClient;
import com.google.cloud.compute.v1.Operation;
import com.google.cloud.compute.v1.SourceInstanceParams;
import java.io.IOException;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;

public class CreateTemplateFromInstance {

  public static void main(String[] args)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {
    // TODO(developer): Replace these variables before running the sample.
    // projectId: project ID or project number of the Cloud project you use.
    // instance: the instance to base the new template on. This value uses the following format:
    // **NOTE**: "projects/{project}/zones/{zone}/instances/{instance_name}"
    // templateName: name of the new template to create.
    String projectId = "your-project-id";
    String templateName = "template-name";
    String instance = String.format("projects/%s/zones/%s/instances/%s", projectId, "zone",
        "instanceName");
    createTemplateFromInstance(projectId, templateName, instance);
  }

  // Create a new instance template based on an existing instance.
  // This new template specifies a different boot disk.
  public static void createTemplateFromInstance(String projectId, String templateName,
      String instance)
      throws IOException, ExecutionException, InterruptedException, TimeoutException {
    try (InstanceTemplatesClient instanceTemplatesClient = InstanceTemplatesClient.create();
        GlobalOperationsClient globalOperationsClient = GlobalOperationsClient.create()) {

      SourceInstanceParams sourceInstanceParams = SourceInstanceParams.newBuilder()
          .addDiskConfigs(DiskInstantiationConfig.newBuilder()
              // Device name must match the name of a disk attached to the instance you are
              // basing your template on.
              .setDeviceName("disk-1")
              // Replace the original boot disk image used in your instance
              // with a Rocky Linux image.
              .setInstantiateFrom(InstantiateFrom.CUSTOM_IMAGE.toString())
              .setCustomImage(
                  String.format("projects/%s/global/images/family/%s", "rocky-linux-cloud",
                      "rocky-linux-8"))
              // Override the AutoDelete setting.
              .setAutoDelete(true).build())
          .build();

      InstanceTemplate instanceTemplate = InstanceTemplate.newBuilder()
          .setName(templateName)
          .setSourceInstance(instance)
          .setSourceInstanceParams(sourceInstanceParams)
          .build();

      InsertInstanceTemplateRequest insertInstanceTemplateRequest = InsertInstanceTemplateRequest
          .newBuilder()
          .setProject(projectId)
          .setInstanceTemplateResource(instanceTemplate)
          .build();

      Operation operation = instanceTemplatesClient.insertCallable()
          .futureCall(insertInstanceTemplateRequest).get(3, TimeUnit.MINUTES);

      Operation response = globalOperationsClient.wait(projectId, operation.getName());

      if (response.hasError()) {
        System.out.println("Instance Template creation failed ! ! " + response);
        return;
      }
      System.out.printf("Instance Template creation operation status %s: %s", templateName,
          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，请设置应用默认凭证。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 instance = 'projects/project/zones/zone/instances/instance';
// const templateName = 'your_template_name';

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

// Create a new instance template based on an existing instance.
// This new template specifies a different boot disk.
async function createTemplateFromInstance() {
  const instanceTemplatesClient = new compute.InstanceTemplatesClient();

  const [response] = await instanceTemplatesClient.insert({
    project: projectId,
    instanceTemplateResource: {
      name: templateName,
      sourceInstance: instance,
      sourceInstanceParams: {
        diskConfigs: [
          {
            // Device name must match the name of a disk attached to the instance
            // your template is based on.
            deviceName: 'disk-1',
            // Replace the original boot disk image used in your instance with a Rocky Linux image.
            instantiateFrom: 'CUSTOM_IMAGE',
            customImage:
              'projects/rocky-linux-cloud/global/images/family/rocky-linux-8',
            // Override the auto_delete setting.
            autoDelete: true,
          },
        ],
      },
    },
  });
  let operation = response.latestResponse;
  const operationsClient = new compute.GlobalOperationsClient();

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

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

createTemplateFromInstance();

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，请设置应用默认凭证。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_template_from_instance(
    project_id: str, instance: str, template_name: str
) -> compute_v1.InstanceTemplate:
    """
    Create a new instance template based on an existing instance.
    This new template specifies a different boot disk.

    Args:
        project_id: project ID or project number of the Cloud project you use.
        instance: the instance to base the new template on. This value uses
            the following format: "projects/{project}/zones/{zone}/instances/{instance_name}"
        template_name: name of the new template to create.

    Returns:
        InstanceTemplate object that represents the new instance template.
    """
    disk = compute_v1.DiskInstantiationConfig()
    # Device name must match the name of a disk attached to the instance you are
    # basing your template on.
    disk.device_name = "disk-1"
    # Replace the original boot disk image used in your instance with a Rocky Linux image.
    disk.instantiate_from = "CUSTOM_IMAGE"
    disk.custom_image = "projects/rocky-linux-cloud/global/images/family/rocky-linux-8"
    # Override the auto_delete setting.
    disk.auto_delete = True

    template = compute_v1.InstanceTemplate()
    template.name = template_name
    template.source_instance = instance
    template.source_instance_params = compute_v1.SourceInstanceParams()
    template.source_instance_params.disk_configs = [disk]

    template_client = compute_v1.InstanceTemplatesClient()
    operation = template_client.insert(
        project=project_id, instance_template_resource=template
    )

    wait_for_extended_operation(operation, "instance template creation")

    return template_client.get(project=project_id, instance_template=template_name)

后续步骤

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代码示例

Go

Java

Node.js

Python

后续步骤

根据现有实例创建实例模板