使用 AWS SDK 启动 Amazon EC2 实例

以下代码示例显示了如何启动 Amazon EC2 实例。

操作示例是大型程序的代码摘录，必须在上下文中运行。在以下代码示例中，您可以查看此操作的上下文：

• 开始使用实例

.NET

AWS SDK for .NET

注意

在 GitHub 上查看更多内容。在 AWS 代码示例存储库 中查找完整示例，了解如何进行设置和运行。

    /// <summary>
    /// Start an EC2 instance.
    /// </summary>
    /// <param name="ec2InstanceId">The instance Id of the Amazon EC2 instance
    /// to start.</param>
    /// <returns>Async task.</returns>
    public async Task StartInstances(string ec2InstanceId)
    {
        var request = new StartInstancesRequest
        {
            InstanceIds = new List<string> { ec2InstanceId },
        };

        var response = await _amazonEC2.StartInstancesAsync(request);

        if (response.StartingInstances.Count > 0)
        {
            var instances = response.StartingInstances;
            instances.ForEach(i =>
            {
                Console.WriteLine($"Successfully started the EC2 instance with instance ID: {i.InstanceId}.");
            });
        }
    }

• 有关 API 详细信息，请参阅《AWS SDK for .NET API 参考》中的 StartInstances。

C++

适用于 C++ 的 SDK

注意

在 GitHub 上查看更多内容。在 AWS 代码示例存储库 中查找完整示例，了解如何进行设置和运行。

    Aws::EC2::EC2Client ec2Client(clientConfiguration);

    Aws::EC2::Model::StartInstancesRequest start_request;
    start_request.AddInstanceIds(instanceId);
    start_request.SetDryRun(true);

    auto dry_run_outcome = ec2Client.StartInstances(start_request);
    if (dry_run_outcome.IsSuccess()) {
        std::cerr
                << "Failed dry run to start instance. A dry run should trigger an error."
                << std::endl;
        return false;
    }
    else if (dry_run_outcome.GetError().GetErrorType() !=
             Aws::EC2::EC2Errors::DRY_RUN_OPERATION) {
        std::cout << "Failed dry run to start instance " << instanceId << ": "
                  << dry_run_outcome.GetError().GetMessage() << std::endl;
        return false;
    }

    start_request.SetDryRun(false);
    auto start_instancesOutcome = ec2Client.StartInstances(start_request);

    if (!start_instancesOutcome.IsSuccess()) {
        std::cout << "Failed to start instance " << instanceId << ": " <<
                  start_instancesOutcome.GetError().GetMessage() << std::endl;
    }
    else {
        std::cout << "Successfully started instance " << instanceId <<
                  std::endl;
    }

• 有关 API 详细信息，请参阅《AWS SDK for C++ API 参考》中的 StartInstances。

Java

SDK for Java 2.x

注意

在 GitHub 上查看更多内容。在 AWS 代码示例存储库 中查找完整示例，了解如何进行设置和运行。

    public static void startInstance(Ec2Client ec2, String instanceId) {
        Ec2Waiter ec2Waiter = Ec2Waiter.builder()
            .overrideConfiguration(b -> b.maxAttempts(100))
            .client(ec2)
            .build();

        StartInstancesRequest request = StartInstancesRequest.builder()
            .instanceIds(instanceId)
            .build();

        System.out.println("Use an Ec2Waiter to wait for the instance to run. This will take a few minutes.");
        ec2.startInstances(request);
        DescribeInstancesRequest instanceRequest = DescribeInstancesRequest.builder()
            .instanceIds(instanceId)
            .build();

        WaiterResponse<DescribeInstancesResponse> waiterResponse = ec2Waiter.waitUntilInstanceRunning(instanceRequest);
        waiterResponse.matched().response().ifPresent(System.out::println);
        System.out.println("Successfully started instance "+instanceId);
    }

• 有关 API 详细信息，请参阅《AWS SDK for Java 2.x API 参考》中的 StartInstances。

JavaScript

SDK for JavaScript (v3)

注意

在 GitHub 上查看更多内容。在 AWS 代码示例存储库 中查找完整示例，了解如何进行设置和运行。

import { StartInstancesCommand } from "@aws-sdk/client-ec2";

import { client } from "../libs/client.js";

export const main = async () => {
  const command = new StartInstancesCommand({
    // Use DescribeInstancesCommand to find InstanceIds
    InstanceIds: ["INSTANCE_ID"],
  });

  try {
    const { StartingInstances } = await client.send(command);
    const instanceIdList = StartingInstances.map(
      (instance) => ` • ${instance.InstanceId}`,
    );
    console.log("Starting instances:");
    console.log(instanceIdList.join("\n"));
  } catch (err) {
    console.error(err);
  }
};

• 有关 API 详细信息，请参阅《AWS SDK for JavaScript API 参考》中的 StartInstances。

Kotlin

SDK for Kotlin

注意

这是适用于预览版中特征的预发行文档。本文档随时可能更改。

注意

在 GitHub 上查看更多内容。在 AWS 代码示例存储库 中查找完整示例，了解如何进行设置和运行。

suspend fun startInstanceSc(instanceId: String) {
    val request = StartInstancesRequest {
        instanceIds = listOf(instanceId)
    }

    Ec2Client { region = "us-west-2" }.use { ec2 ->
        ec2.startInstances(request)
        println("Waiting until instance $instanceId starts. This will take a few minutes.")
        ec2.waitUntilInstanceRunning { // suspend call
            instanceIds = listOf(instanceId)
        }
        println("Successfully started instance $instanceId")
    }
}

• 有关 API 详细信息，请参阅《AWS SDK for Kotlin API 参考》中的 StartInstances。

Python

适用于 Python (Boto3) 的 SDK

注意

在 GitHub 上查看更多内容。在 AWS 代码示例存储库 中查找完整示例，了解如何进行设置和运行。

class InstanceWrapper:
    """Encapsulates Amazon Elastic Compute Cloud (Amazon EC2) instance actions."""

    def __init__(self, ec2_resource, instance=None):
        """
        :param ec2_resource: A Boto3 Amazon EC2 resource. This high-level resource
                             is used to create additional high-level objects
                             that wrap low-level Amazon EC2 service actions.
        :param instance: A Boto3 Instance object. This is a high-level object that
                           wraps instance actions.
        """
        self.ec2_resource = ec2_resource
        self.instance = instance

    @classmethod
    def from_resource(cls):
        ec2_resource = boto3.resource("ec2")
        return cls(ec2_resource)


    def start(self):
        """
        Starts an instance and waits for it to be in a running state.

        :return: The response to the start request.
        """
        if self.instance is None:
            logger.info("No instance to start.")
            return

        try:
            response = self.instance.start()
            self.instance.wait_until_running()
        except ClientError as err:
            logger.error(
                "Couldn't start instance %s. Here's why: %s: %s",
                self.instance.id,
                err.response["Error"]["Code"],
                err.response["Error"]["Message"],
            )
            raise
        else:
            return response

• 有关 API 详细信息，请参阅《AWS SDK for Python（Boto3）API 参考》中的 StartInstances。

Ruby

SDK for Ruby

注意

在 GitHub 上查看更多内容。在 AWS 代码示例存储库 中查找完整示例，了解如何进行设置和运行。

require "aws-sdk-ec2"

# Attempts to start an Amazon Elastic Compute Cloud (Amazon EC2) instance.
#
# Prerequisites:
#
# - The Amazon EC2 instance.
#
# @param ec2_client [Aws::EC2::Client] An initialized EC2 client.
# @param instance_id [String] The ID of the instance.
# @return [Boolean] true if the instance was started; otherwise, false.
# @example
#   exit 1 unless instance_started?(
#     Aws::EC2::Client.new(region: 'us-west-2'),
#     'i-123abc'
#   )
def instance_started?(ec2_client, instance_id)
  response = ec2_client.describe_instance_status(instance_ids: [instance_id])

  if response.instance_statuses.count.positive?
    state = response.instance_statuses[0].instance_state.name
    case state
    when "pending"
      puts "Error starting instance: the instance is pending. Try again later."
      return false
    when "running"
      puts "The instance is already running."
      return true
    when "terminated"
      puts "Error starting instance: " \
        "the instance is terminated, so you cannot start it."
      return false
    end
  end

  ec2_client.start_instances(instance_ids: [instance_id])
  ec2_client.wait_until(:instance_running, instance_ids: [instance_id])
  puts "Instance started."
  return true
rescue StandardError => e
  puts "Error starting instance: #{e.message}"
  return false
end

# Full example call:
def run_me
  instance_id = ""
  region = ""
  # Print usage information and then stop.
  if ARGV[0] == "--help" || ARGV[0] == "-h"
    puts "Usage:   ruby ec2-ruby-example-start-instance-i-123abc.rb " \
      "INSTANCE_ID REGION "
  # Replace us-west-2 with the AWS Region you're using for Amazon EC2.
    puts "Example: ruby ec2-ruby-example-start-instance-i-123abc.rb " \
      "i-123abc us-west-2"
    exit 1
  # If no values are specified at the command prompt, use these default values.
  # Replace us-west-2 with the AWS Region you're using for Amazon EC2.
  elsif ARGV.count.zero?
    instance_id = "i-123abc"
    region = "us-west-2"
  # Otherwise, use the values as specified at the command prompt.
  else
    instance_id = ARGV[0]
    region = ARGV[1]
  end

  ec2_client = Aws::EC2::Client.new(region: region)

  puts "Attempting to start instance '#{instance_id}' " \
    "(this might take a few minutes)..."
  unless instance_started?(ec2_client, instance_id)
    puts "Could not start instance."
  end
end

run_me if $PROGRAM_NAME == __FILE__

• 有关 API 详细信息，请参阅《AWS SDK for Ruby API 参考》中的 StartInstances。

Rust

SDK for Rust

注意

本文档适用于预览版中的软件开发工具包。软件开发工具包可能随时发生变化，不应在生产环境中使用。

注意

在 GitHub 上查看更多内容。在 AWS 代码示例存储库 中查找完整示例，了解如何进行设置和运行。

async fn start_instance(client: &Client, id: &str) -> Result<(), Error> {
    client.start_instances().instance_ids(id).send().await?;

    println!("Started instance.");

    Ok(())
}

• 有关 API 详细信息，请参阅《AWS SDK for Rust API 参考》中的 StartInstances。

SAP ABAP

适用于 SAP ABAP 的 SDK

注意

在 GitHub 上查看更多内容。在 AWS 代码示例存储库 中查找完整示例，了解如何进行设置和运行。

    DATA lt_instance_ids TYPE /aws1/cl_ec2instidstringlist_w=>tt_instanceidstringlist.
    APPEND NEW /aws1/cl_ec2instidstringlist_w( iv_value = iv_instance_id ) TO lt_instance_ids.

    "Perform dry run"
    TRY.
        " DryRun is set to true. This checks for the required permissions to start the instance without actually making the request. "
        lo_ec2->startinstances(
          it_instanceids = lt_instance_ids
          iv_dryrun = abap_true
        ).
      CATCH /aws1/cx_rt_service_generic INTO DATA(lo_exception).
        " If the error code returned is `DryRunOperation`, then you have the required permissions to start this instance. "
        IF lo_exception->av_err_code = 'DryRunOperation'.
          MESSAGE 'Dry run to start instance completed.' TYPE 'I'.
          " DryRun is set to false to start instance. "
          oo_result = lo_ec2->startinstances(           " oo_result is returned for testing purposes. "
            it_instanceids = lt_instance_ids
            iv_dryrun = abap_false
          ).
          MESSAGE 'Successfully started the EC2 instance.' TYPE 'I'.
          " If the error code returned is `UnauthorizedOperation`, then you don't have the required permissions to start this instance. "
        ELSEIF lo_exception->av_err_code = 'UnauthorizedOperation'.
          MESSAGE 'Dry run to start instance failed. User does not have permissions to start the instance.' TYPE 'E'.
        ELSE.
          DATA(lv_error) = |"{ lo_exception->av_err_code }" - { lo_exception->av_err_msg }|.
          MESSAGE lv_error TYPE 'E'.
        ENDIF.
    ENDTRY.

• 有关 API 详细信息，请参阅《AWS SDK for SAP ABAP API 参考》中的 StartInstances。

有关 AWS 软件开发工具包开发人员指南和代码示例的完整列表，请参阅 将 Amazon EC2 与 AWS SDK 结合使用。本主题还包括有关入门的信息以及有关先前的软件开发工具包版本的详细信息。