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# 使用 Amazon EC2 的示例 适用于 C\$1\$1 的 AWS SDK
<a name="examples-ec2"></a>

Amazon Elastic Compute Cloud（Amazon EC2）是一项 Web 服务，可提供大小可调节的计算容量（确切地说，即 Amazon 数据中心的服务器），您可以使用它来构建和托管您的软件系统。您可以使用以下示例通过 适用于 C\$1\$1 的 AWS SDK对 [Amazon EC2](https://aws.amazon.com/ec2) 进行编程。

**注意**  
本指南中仅提供了演示某些技术所需的代码，但[完整的示例代码可在上找到 GitHub](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp)。 GitHub 您可以下载单个源文件，也可以在本地克隆存储库以获取、构建和运行所有示例。

**Topics**
+ [管理 Amazon EC2 实例](examples-ec2-instances.md)
+ [在 Amazon EC2 中使用弹性 IP 地址](examples-ec2-elastic-ip.md)
+ [将区域和可用区用于 &EC2](examples-ec2-regions-zones.md)
+ [使用 &EC2; 密钥对](examples-ec2-key-pairs.md)
+ [使用 Amazon EC2 中的安全组](examples-ec2-security-groups.md)

# 管理 Amazon EC2 实例
<a name="examples-ec2-instances"></a>

## 先决条件
<a name="codeExamplePrereq"></a>

在开始之前，建议您先阅读[开始使用 适用于 C\$1\$1 的 AWS SDK](getting-started.md)。

下载示例代码并按[代码示例入门](getting-started-code-examples.md)中所述构建解决方案。

要运行这些示例，您的代码用于发出请求的用户配置文件必须具有适当的权限 AWS （适用于服务和操作）。有关更多信息，请参阅[提供 AWS 凭证](credentials.md)。

## 创建 实例
<a name="create-an-instance"></a>

通过调用 EC2客户端的`RunInstances`函数，为其提供[RunInstancesRequest](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_run_instances_request.html)包含要使用的[亚马逊系统映像 (AMI)](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/AMIs.html) 和[实例类型](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/instance-types.html)来创建新的 Amazon EC2 实例。

 **包含** 

```
#include <aws/core/Aws.h>
#include <aws/ec2/EC2Client.h>
#include <aws/ec2/model/RunInstancesRequest.h>
#include <iostream>
```

 **代码** 

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

    Aws::EC2::Model::RunInstancesRequest runRequest;
    runRequest.SetImageId(amiId);
    runRequest.SetInstanceType(Aws::EC2::Model::InstanceType::t1_micro);
    runRequest.SetMinCount(1);
    runRequest.SetMaxCount(1);

    Aws::EC2::Model::RunInstancesOutcome runOutcome = ec2Client.RunInstances(
            runRequest);
    if (!runOutcome.IsSuccess()) {
        std::cerr << "Failed to launch EC2 instance " << instanceName <<
                  " based on ami " << amiId << ":" <<
                  runOutcome.GetError().GetMessage() << std::endl;
        return false;
    }

    const Aws::Vector<Aws::EC2::Model::Instance> &instances = runOutcome.GetResult().GetInstances();
    if (instances.empty()) {
        std::cerr << "Failed to launch EC2 instance " << instanceName <<
                  " based on ami " << amiId << ":" <<
                  runOutcome.GetError().GetMessage() << std::endl;
        return false;
    }
```

请参阅[完整示例](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/ec2/run_instances.cpp)。

## 启动实例
<a name="start-an-instance"></a>

要启动 Amazon EC2 实例，请调用 EC2客户端的`StartInstances`函数，为其提供[StartInstancesRequest](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_start_instances_request.html)包含要启动的实例 ID。

 **包含** 

```
#include <aws/ec2/EC2Client.h>
#include <aws/ec2/model/StartInstancesRequest.h>
```

 **代码** 

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

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

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

    startRequest.SetDryRun(false);
    Aws::EC2::Model::StartInstancesOutcome startInstancesOutcome = ec2Client.StartInstances(startRequest);

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

请参阅[完整示例](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/ec2/start_stop_instance.cpp)。

## 停止实例
<a name="stop-an-instance"></a>

要停止 Amazon EC2 实例，请调用 EC2客户端的`StopInstances`函数，为其提供[StopInstancesRequest](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_stop_instances_request.html)包含要停止的实例的 ID。

 **包含** 

```
#include <aws/ec2/model/StopInstancesRequest.h>
```

 **代码** 

```
    Aws::EC2::EC2Client ec2Client(clientConfiguration);
    Aws::EC2::Model::StopInstancesRequest request;
    request.AddInstanceIds(instanceId);
    request.SetDryRun(true);

    Aws::EC2::Model::StopInstancesOutcome dryRunOutcome = ec2Client.StopInstances(request);
    if (dryRunOutcome.IsSuccess()) {
        std::cerr
                << "Failed dry run to stop instance. A dry run should trigger an error."
                << std::endl;
        return false;
    } else if (dryRunOutcome.GetError().GetErrorType() !=
               Aws::EC2::EC2Errors::DRY_RUN_OPERATION) {
        std::cout << "Failed dry run to stop instance " << instanceId << ": "
                  << dryRunOutcome.GetError().GetMessage() << std::endl;
        return false;
    }

    request.SetDryRun(false);
    Aws::EC2::Model::StopInstancesOutcome outcome = ec2Client.StopInstances(request);
    if (!outcome.IsSuccess()) {
        std::cout << "Failed to stop instance " << instanceId << ": " <<
                  outcome.GetError().GetMessage() << std::endl;
    } else {
        std::cout << "Successfully stopped instance " << instanceId <<
                  std::endl;
    }
```

请参阅[完整示例](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/ec2/start_stop_instance.cpp)。

## 重启实例
<a name="reboot-an-instance"></a>

要重启 Amazon EC2 实例，请调用 EC2客户端的`RebootInstances`函数，为其提供[RebootInstancesRequest](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_reboot_instances_request.html)包含要重启的实例 ID。

 **包含** 

```
#include <aws/ec2/EC2Client.h>
#include <aws/ec2/model/RebootInstancesRequest.h>
#include <iostream>
```

 **代码** 

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

    Aws::EC2::Model::RebootInstancesRequest request;
    request.AddInstanceIds(instanceId);
    request.SetDryRun(true);

    Aws::EC2::Model::RebootInstancesOutcome dry_run_outcome = ec2Client.RebootInstances(request);
    if (dry_run_outcome.IsSuccess()) {
        std::cerr
                << "Failed dry run to reboot on 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 reboot instance " << instanceId << ": "
                  << dry_run_outcome.GetError().GetMessage() << std::endl;
        return false;
    }

    request.SetDryRun(false);
    Aws::EC2::Model::RebootInstancesOutcome outcome = ec2Client.RebootInstances(request);
    if (!outcome.IsSuccess()) {
        std::cout << "Failed to reboot instance " << instanceId << ": " <<
                  outcome.GetError().GetMessage() << std::endl;
    } else {
        std::cout << "Successfully rebooted instance " << instanceId <<
                  std::endl;
    }
```

请参阅[完整示例](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/ec2/reboot_instance.cpp)。

## 描述实例
<a name="describe-instances"></a>

要列出您的实例，请创建[DescribeInstancesRequest](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_describe_instances_request.html)并调用 EC2客户端的`DescribeInstances`函数。它将返回一个[DescribeInstancesResponse](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_describe_instances_response.html)对象，您可以使用该对象列出您的 AWS 账户 和的 Amazon EC2 实例 AWS 区域。

实例按*预留*进行分组。每个预留对应对启动实例的 `StartInstances` 的调用。要列出您的实例，您必须先调用 `DescribeInstancesResponse` 类的 `GetReservations` 函数，然后对每个返回的 Reservation 对象调用 `getInstances`。

 **包含** 

```
#include <aws/ec2/EC2Client.h>
#include <aws/ec2/model/DescribeInstancesRequest.h>
#include <aws/ec2/model/DescribeInstancesResponse.h>
#include <iomanip>
#include <iostream>
```

 **代码** 

```
    Aws::EC2::EC2Client ec2Client(clientConfiguration);
    Aws::EC2::Model::DescribeInstancesRequest request;
    bool header = false;
    bool done = false;
    while (!done) {
        Aws::EC2::Model::DescribeInstancesOutcome outcome = ec2Client.DescribeInstances(request);
        if (outcome.IsSuccess()) {
            if (!header) {
                std::cout << std::left <<
                          std::setw(48) << "Name" <<
                          std::setw(20) << "ID" <<
                          std::setw(25) << "Ami" <<
                          std::setw(15) << "Type" <<
                          std::setw(15) << "State" <<
                          std::setw(15) << "Monitoring" << std::endl;
                header = true;
            }

            const std::vector<Aws::EC2::Model::Reservation> &reservations =
                    outcome.GetResult().GetReservations();

            for (const auto &reservation: reservations) {
                const std::vector<Aws::EC2::Model::Instance> &instances =
                        reservation.GetInstances();
                for (const auto &instance: instances) {
                    Aws::String instanceStateString =
                            Aws::EC2::Model::InstanceStateNameMapper::GetNameForInstanceStateName(
                                    instance.GetState().GetName());

                    Aws::String typeString =
                            Aws::EC2::Model::InstanceTypeMapper::GetNameForInstanceType(
                                    instance.GetInstanceType());

                    Aws::String monitorString =
                            Aws::EC2::Model::MonitoringStateMapper::GetNameForMonitoringState(
                                    instance.GetMonitoring().GetState());
                    Aws::String name = "Unknown";

                    const std::vector<Aws::EC2::Model::Tag> &tags = instance.GetTags();
                    auto nameIter = std::find_if(tags.cbegin(), tags.cend(),
                                                 [](const Aws::EC2::Model::Tag &tag) {
                                                     return tag.GetKey() == "Name";
                                                 });
                    if (nameIter != tags.cend()) {
                        name = nameIter->GetValue();
                    }
                    std::cout <<
                              std::setw(48) << name <<
                              std::setw(20) << instance.GetInstanceId() <<
                              std::setw(25) << instance.GetImageId() <<
                              std::setw(15) << typeString <<
                              std::setw(15) << instanceStateString <<
                              std::setw(15) << monitorString << std::endl;
                }
            }

            if (!outcome.GetResult().GetNextToken().empty()) {
                request.SetNextToken(outcome.GetResult().GetNextToken());
            } else {
                done = true;
            }
        } else {
            std::cerr << "Failed to describe EC2 instances:" <<
                      outcome.GetError().GetMessage() << std::endl;
            return false;
        }
    }
```

结果将分页；您可以获取更多结果，方法是：将从结果对象的 `GetNextToken` 函数返回的值传递到您的原始请求对象的 `SetNextToken` 函数，然后在下一个 `DescribeInstances` 调用中使用相同的请求对象。

请参阅[完整示例](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/ec2/describe_instances.cpp)。

## 启用实例监控
<a name="enable-instance-monitoring"></a>

您可以监控 Amazon EC2 实例的各方面，例如 CPU 和网络利用率、可用内存和剩余磁盘空间。要了解有关实例监控的更多信息，请参阅《Amazon EC2 用户指南》中的[监控 Amazon EC2](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/monitoring_ec2.html)。

要开始监控实例，您必须[MonitorInstancesRequest](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_monitor_instances_request.html)使用要监控的实例的 ID 创建一个，并将其传递给 EC2客户端的`MonitorInstances`函数。

 **包含** 

```
#include <aws/ec2/EC2Client.h>
#include <aws/ec2/model/MonitorInstancesRequest.h>
#include <aws/ec2/model/UnmonitorInstancesRequest.h>
#include <iostream>
```

 **代码** 

```
    Aws::EC2::EC2Client ec2Client(clientConfiguration);
    Aws::EC2::Model::MonitorInstancesRequest request;
    request.AddInstanceIds(instanceId);
    request.SetDryRun(true);

    Aws::EC2::Model::MonitorInstancesOutcome dryRunOutcome = ec2Client.MonitorInstances(request);
    if (dryRunOutcome.IsSuccess()) {
        std::cerr
                << "Failed dry run to enable monitoring on instance. A dry run should trigger an error."
                <<
                std::endl;
        return false;
    } else if (dryRunOutcome.GetError().GetErrorType()
               != Aws::EC2::EC2Errors::DRY_RUN_OPERATION) {
        std::cerr << "Failed dry run to enable monitoring on instance " <<
                  instanceId << ": " << dryRunOutcome.GetError().GetMessage() <<
                  std::endl;
        return false;
    }

    request.SetDryRun(false);
    Aws::EC2::Model::MonitorInstancesOutcome monitorInstancesOutcome = ec2Client.MonitorInstances(request);
    if (!monitorInstancesOutcome.IsSuccess()) {
        std::cerr << "Failed to enable monitoring on instance " <<
                  instanceId << ": " <<
                  monitorInstancesOutcome.GetError().GetMessage() << std::endl;
    } else {
        std::cout << "Successfully enabled monitoring on instance " <<
                  instanceId << std::endl;
    }
```

请参阅[完整示例](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/ec2/monitor_instance.cpp)。

## 禁用实例监控
<a name="disable-instance-monitoring"></a>

要停止监控实例，请[UnmonitorInstancesRequest](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_unmonitor_instances_request.html)使用要停止监控的实例 ID 创建一个，然后将其传递给 EC2客户端的`UnmonitorInstances`函数。

 **包含** 

```
#include <aws/ec2/EC2Client.h>
#include <aws/ec2/model/MonitorInstancesRequest.h>
#include <aws/ec2/model/UnmonitorInstancesRequest.h>
#include <iostream>
```

 **代码** 

```
    Aws::EC2::EC2Client ec2Client(clientConfiguration);
    Aws::EC2::Model::UnmonitorInstancesRequest unrequest;
    unrequest.AddInstanceIds(instanceId);
    unrequest.SetDryRun(true);

    Aws::EC2::Model::UnmonitorInstancesOutcome dryRunOutcome = ec2Client.UnmonitorInstances(unrequest);
    if (dryRunOutcome.IsSuccess()) {
        std::cerr
                << "Failed dry run to disable monitoring on instance. A dry run should trigger an error."
                <<
                std::endl;
        return false;
    } else if (dryRunOutcome.GetError().GetErrorType() !=
               Aws::EC2::EC2Errors::DRY_RUN_OPERATION) {
        std::cout << "Failed dry run to disable monitoring on instance " <<
                  instanceId << ": " << dryRunOutcome.GetError().GetMessage() <<
                  std::endl;
        return false;
    }

    unrequest.SetDryRun(false);
    Aws::EC2::Model::UnmonitorInstancesOutcome unmonitorInstancesOutcome = ec2Client.UnmonitorInstances(unrequest);
    if (!unmonitorInstancesOutcome.IsSuccess()) {
        std::cout << "Failed to disable monitoring on instance " << instanceId
                  << ": " << unmonitorInstancesOutcome.GetError().GetMessage() <<
                  std::endl;
    } else {
        std::cout << "Successfully disable monitoring on instance " <<
                  instanceId << std::endl;
    }
```

请参阅[完整示例](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/ec2/monitor_instance.cpp)。

## 更多信息
<a name="more-information"></a>
+  [RunInstances](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_RunInstances.html)在 Amazon EC2 API 参考中
+  [DescribeInstances](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DescribeInstances.html)在 Amazon EC2 API 参考中
+  [StartInstances](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_StartInstances.html)在 Amazon EC2 API 参考中
+  [StopInstances](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_StopInstances.html)在 Amazon EC2 API 参考中
+  [RebootInstances](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_RebootInstances.html)在 Amazon EC2 API 参考中
+  [DescribeInstances](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DescribeInstances.html)在 Amazon EC2 API 参考中
+  [MonitorInstances](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_MonitorInstances.html)在 Amazon EC2 API 参考中
+  [UnmonitorInstances](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_UnmonitorInstances.html)在 Amazon EC2 API 参考中

# 在 Amazon EC2 中使用弹性 IP 地址
<a name="examples-ec2-elastic-ip"></a>

## 先决条件
<a name="codeExamplePrereq"></a>

在开始之前，建议您先阅读[开始使用 适用于 C\$1\$1 的 AWS SDK](getting-started.md)。

下载示例代码并按[代码示例入门](getting-started-code-examples.md)中所述构建解决方案。

要运行这些示例，您的代码用于发出请求的用户配置文件必须具有适当的权限 AWS （适用于服务和操作）。有关更多信息，请参阅[提供 AWS 凭证](credentials.md)。

## 分配弹性 IP 地址
<a name="allocate-an-elastic-ip-address"></a>

要使用弹性 IP 地址，您应首先向您的账户分配这样一个地址，然后将其与您的实例或网络接口关联。

要分配弹性 IP 地址，请使用包含网络类型（经典 EC2 或 VPC）的[AllocateAddressRequest](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_allocate_address_request.html)对象调用 EC2客户端`AllocateAddress`函数。

**警告**  
我们将于 2022 年 8 月 15 日停用 EC2-Classic。我们建议您从 EC2-Classic 迁移到 VPC。有关更多信息，请参阅[适用于 Linux 实例的 Amazon EC2 用户指南](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/vpc-migrate.html)或[适用于 Windows 实例的 Amazon EC2 用户指南](https://docs.aws.amazon.com/AWSEC2/latest/WindowsGuide/vpc-migrate.html)中的**从 EC2-Classic 迁移到 VPC**。另请参阅 [EC2-Classic Networking is Retiring – Here's How to Prepare](https://aws.amazon.com/blogs/aws/ec2-classic-is-retiring-heres-how-to-prepare/) 博客文章。

response 对象中的[AllocateAddressResponse](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_allocate_address_response.html)类包含一个分配 ID，通过将分配 ID 和实例 ID 传递给 EC2客户端的`AssociateAddress`函数，您可以使用该分配ID [AssociateAddressRequest](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_associate_address_request.html)将地址与实例相关联。

 **包含** 

```
#include <aws/ec2/EC2Client.h>
#include <aws/ec2/model/AllocateAddressRequest.h>
#include <aws/ec2/model/AssociateAddressRequest.h>
#include <iostream>
```

 **代码** 

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

    Aws::EC2::Model::AllocateAddressRequest request;
    request.SetDomain(Aws::EC2::Model::DomainType::vpc);

    const Aws::EC2::Model::AllocateAddressOutcome outcome =
            ec2Client.AllocateAddress(request);
    if (!outcome.IsSuccess()) {
        std::cerr << "Failed to allocate Elastic IP address:" <<
                  outcome.GetError().GetMessage() << std::endl;
        return false;
    }
    const Aws::EC2::Model::AllocateAddressResponse &response = outcome.GetResult();
    allocationID = response.GetAllocationId();
    publicIPAddress = response.GetPublicIp();


    Aws::EC2::Model::AssociateAddressRequest associate_request;
    associate_request.SetInstanceId(instanceId);
    associate_request.SetAllocationId(allocationID);

    const Aws::EC2::Model::AssociateAddressOutcome associate_outcome =
            ec2Client.AssociateAddress(associate_request);
    if (!associate_outcome.IsSuccess()) {
        std::cerr << "Failed to associate Elastic IP address " << allocationID
                  << " with instance " << instanceId << ":" <<
                  associate_outcome.GetError().GetMessage() << std::endl;
        return false;
    }

    std::cout << "Successfully associated Elastic IP address " << allocationID
              << " with instance " << instanceId << std::endl;
```

请参阅[完整示例](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/ec2/allocate_address.cpp)。

## 描述弹性 IP 地址
<a name="describe-elastic-ip-addresses"></a>

要列出分配给您的账户的弹性 IP 地址，请调用 EC2客户端`DescribeAddresses`函数。[它会返回一个结果对象，[DescribeAddressesResponse](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_describe_addresses_response.html)其中包含一个，您可以使用该结果对象来获取代表您账户中弹性 IP 地址的地址对象列表。](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_address.html)

 **包含** 

```
#include <aws/ec2/EC2Client.h>
#include <aws/ec2/model/DescribeAddressesRequest.h>
#include <aws/ec2/model/DescribeAddressesResponse.h>
#include <iomanip>
#include <iostream>
```

 **代码** 

```
    Aws::EC2::EC2Client ec2Client(clientConfiguration);
    Aws::EC2::Model::DescribeAddressesRequest request;
    Aws::EC2::Model::DescribeAddressesOutcome outcome = ec2Client.DescribeAddresses(request);
    if (outcome.IsSuccess()) {
        std::cout << std::left << std::setw(20) << "InstanceId" <<
                  std::setw(15) << "Public IP" << std::setw(10) << "Domain" <<
                  std::setw(30) << "Allocation ID" << std::setw(25) <<
                  "NIC ID" << std::endl;

        const Aws::Vector<Aws::EC2::Model::Address> &addresses = outcome.GetResult().GetAddresses();
        for (const auto &address: addresses) {
            Aws::String domainString =
                    Aws::EC2::Model::DomainTypeMapper::GetNameForDomainType(
                            address.GetDomain());

            std::cout << std::left << std::setw(20) <<
                      address.GetInstanceId() << std::setw(15) <<
                      address.GetPublicIp() << std::setw(10) << domainString <<
                      std::setw(30) << address.GetAllocationId() << std::setw(25)
                      << address.GetNetworkInterfaceId() << std::endl;
        }
    } else {
        std::cerr << "Failed to describe Elastic IP addresses:" <<
                  outcome.GetError().GetMessage() << std::endl;
    }
```

请参阅[完整示例](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/ec2/describe_addresses.cpp)。

## 释放弹性 IP 地址
<a name="release-an-elastic-ip-address"></a>

要释放弹性 IP 地址，请调用 EC2客户端的`ReleaseAddress`函数，将其传递给[ReleaseAddressRequest](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_release_address_request.html)包含要释放的弹性 IP 地址的分配 ID。

 **包含** 

```
#include <aws/ec2/EC2Client.h>
#include <aws/ec2/model/ReleaseAddressRequest.h>
#include <iostream>
```

 **代码** 

```
    Aws::EC2::EC2Client ec2(clientConfiguration);

    Aws::EC2::Model::ReleaseAddressRequest request;
    request.SetAllocationId(allocationID);

    Aws::EC2::Model::ReleaseAddressOutcome outcome = ec2.ReleaseAddress(request);
    if (!outcome.IsSuccess()) {
        std::cerr << "Failed to release Elastic IP address " <<
                  allocationID << ":" << outcome.GetError().GetMessage() <<
                  std::endl;
    } else {
        std::cout << "Successfully released Elastic IP address " <<
                  allocationID << std::endl;
    }
```

在您释放弹性 IP 地址后，它会被释放到 AWS IP 地址池中，之后您可能无法使用。请务必更新您的 DNS 记录和通过该地址进行通信的任何服务器或设备。如果您尝试释放已释放的弹性 IP 地址，则如果该地址已分配给其他 AWS 账户，则会收到*AuthFailure*错误消息。

如果您使用的是默认 VPC**，则释放弹性 IP 地址会自动断开该地址与任何实例的关联。要取消关联弹性 IP 地址而不将其释放，请使用 EC2客户端的`DisassociateAddress`函数。

如果您使用的是非默认 VPC，则*必须*使用 `DisassociateAddress` 取消弹性 IP 地址的关联，然后再尝试释放它。否则，Amazon EC2 会返回错误（*无效IPAddress。 InUse*)。

请参阅[完整示例](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/ec2/release_address.cpp)。

## 更多信息
<a name="more-information"></a>
+  《Amazon EC2 用户指南》中的[弹性 IP 地址](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/elastic-ip-addresses-eip.html)
+  [AllocateAddress](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_AllocateAddress.html)在 Amazon EC2 API 参考中
+  [DescribeAddresses](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DescribeAddresses.html)在 Amazon EC2 API 参考中
+  [ReleaseAddress](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_ReleaseAddress.html)在 Amazon EC2 API 参考中

# 将区域和可用区用于 &EC2
<a name="examples-ec2-regions-zones"></a>

## 先决条件
<a name="codeExamplePrereq"></a>

在开始之前，建议您先阅读[开始使用 适用于 C\$1\$1 的 AWS SDK](getting-started.md)。

下载示例代码并按[代码示例入门](getting-started-code-examples.md)中所述构建解决方案。

要运行这些示例，您的代码用于发出请求的用户配置文件必须具有适当的权限 AWS （适用于服务和操作）。有关更多信息，请参阅[提供 AWS 凭证](credentials.md)。

## 描述区域
<a name="describe-regions"></a>

要列出 AWS 区域 可供您使用的 AWS 账户，请使用调用 EC2客户端`DescribeRegions`函数[DescribeRegionsRequest](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_describe_regions_request.html)。

你将在结果对象[DescribeRegionsResponse](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_describe_regions_response.html)中收到。调用其 `GetRegions` 函数以获取代表每个区域的 [Region](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_region.html) 对象列表。

 **包含** 

```
#include <aws/ec2/EC2Client.h>
#include <aws/ec2/model/DescribeRegionsRequest.h>
```

 **代码** 

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

    Aws::EC2::Model::DescribeRegionsRequest request;
    Aws::EC2::Model::DescribeRegionsOutcome outcome = ec2Client.DescribeRegions(request);
    if (outcome.IsSuccess()) {
        std::cout << std::left <<
                  std::setw(32) << "RegionName" <<
                  std::setw(64) << "Endpoint" << std::endl;

        const auto &regions = outcome.GetResult().GetRegions();
        for (const auto &region: regions) {
            std::cout << std::left <<
                      std::setw(32) << region.GetRegionName() <<
                      std::setw(64) << region.GetEndpoint() << std::endl;
        }
    } else {
        std::cerr << "Failed to describe regions:" <<
                  outcome.GetError().GetMessage() << std::endl;
    }
```

请参阅[完整示例](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/ec2/describe_regions_and_zones.cpp)。

## 描述可用区
<a name="describe-availability-zones"></a>

要列出您的账户可用的每个可用区，请使用调用 EC2客户端`DescribeAvailabilityZones`函数[DescribeAvailabilityZonesRequest](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_describe_availability_zones_request.html)。

你将在结果对象[DescribeAvailabilityZonesResponse](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_describe_availability_zones_response.html)中收到。调用其`GetAvailabilityZones`函数以获取代表每个可用区的[AvailabilityZone](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_availability_zone.html)对象列表。

 **包含** 

```
#include <aws/ec2/model/DescribeAvailabilityZonesRequest.h>
```

 **代码** 

```
    Aws::EC2::Model::DescribeAvailabilityZonesRequest request;
    Aws::EC2::Model::DescribeAvailabilityZonesOutcome outcome = ec2Client.DescribeAvailabilityZones(request);

    if (outcome.IsSuccess()) {
        std::cout << std::left <<
                  std::setw(32) << "ZoneName" <<
                  std::setw(20) << "State" <<
                  std::setw(32) << "Region" << std::endl;

        const auto &zones =
                outcome.GetResult().GetAvailabilityZones();

        for (const auto &zone: zones) {
            Aws::String stateString =
                    Aws::EC2::Model::AvailabilityZoneStateMapper::GetNameForAvailabilityZoneState(
                            zone.GetState());
            std::cout << std::left <<
                      std::setw(32) << zone.GetZoneName() <<
                      std::setw(20) << stateString <<
                      std::setw(32) << zone.GetRegionName() << std::endl;
        }
    } else {
        std::cerr << "Failed to describe availability zones:" <<
                  outcome.GetError().GetMessage() << std::endl;

    }
```

请参阅[完整示例](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/ec2/describe_regions_and_zones.cpp)。

## 更多信息
<a name="more-information"></a>
+  《Amazon EC2 用户指南》中的[区域和可用区](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/using-regions-availability-zones.html)
+  [DescribeRegions](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DescribeRegions.html)在 Amazon EC2 API 参考中
+  [DescribeAvailabilityZones](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DescribeAvailabilityZones.html)在 Amazon EC2 API 参考中

# 使用 &EC2; 密钥对
<a name="examples-ec2-key-pairs"></a>

## 先决条件
<a name="codeExamplePrereq"></a>

在开始之前，建议您先阅读[开始使用 适用于 C\$1\$1 的 AWS SDK](getting-started.md)。

下载示例代码并按[代码示例入门](getting-started-code-examples.md)中所述构建解决方案。

要运行这些示例，您的代码用于发出请求的用户配置文件必须具有适当的权限 AWS （适用于服务和操作）。有关更多信息，请参阅[提供 AWS 凭证](credentials.md)。

## 创建密钥对
<a name="create-a-key-pair"></a>

要创建密钥对，请使用包含密钥名称的调用 EC2客户端`CreateKeyPair`函数。[CreateKeyPairRequest](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_create_key_pair_request.html)

 **包含** 

```
#include <aws/ec2/EC2Client.h>
#include <aws/ec2/model/CreateKeyPairRequest.h>
#include <iostream>
#include <fstream>
```

 **代码** 

```
    Aws::EC2::EC2Client ec2Client(clientConfiguration);
    Aws::EC2::Model::CreateKeyPairRequest request;
    request.SetKeyName(keyPairName);

    Aws::EC2::Model::CreateKeyPairOutcome outcome = ec2Client.CreateKeyPair(request);
    if (!outcome.IsSuccess()) {
        std::cerr << "Failed to create key pair - "  << keyPairName << ". " <<
                  outcome.GetError().GetMessage() << std::endl;
    } else {
        std::cout << "Successfully created key pair named " <<
                  keyPairName << std::endl;
        if (!keyFilePath.empty()) {
            std::ofstream keyFile(keyFilePath.c_str());
            keyFile << outcome.GetResult().GetKeyMaterial();
            keyFile.close();
            std::cout << "Keys written to the file " <<
                      keyFilePath << std::endl;
        }

    }
```

请参阅[完整示例](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/ec2/create_key_pair.cpp)。

## 描述密钥对
<a name="describe-key-pairs"></a>

要列出您的密钥对或获取有关密钥对的信息，请使用调用 EC2客户端`DescribeKeyPairs`函数[DescribeKeyPairsRequest](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_describe_key_pairs_request.html)。

您将收到一个 [DescribeKeyPairsResponse](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_describe_key_pairs_response.html)，您可以通过调用其`GetKeyPairs`函数来访问密钥对列表，该函数返回[KeyPairInfo](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_key_pair_info.html)对象列表。

 **包含** 

```
#include <aws/ec2/EC2Client.h>
#include <aws/ec2/model/DescribeKeyPairsRequest.h>
#include <aws/ec2/model/DescribeKeyPairsResponse.h>
#include <iomanip>
#include <iostream>
```

 **代码** 

```
    Aws::EC2::EC2Client ec2Client(clientConfiguration);
    Aws::EC2::Model::DescribeKeyPairsRequest request;

    Aws::EC2::Model::DescribeKeyPairsOutcome outcome = ec2Client.DescribeKeyPairs(request);
    if (outcome.IsSuccess()) {
        std::cout << std::left <<
                  std::setw(32) << "Name" <<
                  std::setw(64) << "Fingerprint" << std::endl;

        const std::vector<Aws::EC2::Model::KeyPairInfo> &key_pairs =
                outcome.GetResult().GetKeyPairs();
        for (const auto &key_pair: key_pairs) {
            std::cout << std::left <<
                      std::setw(32) << key_pair.GetKeyName() <<
                      std::setw(64) << key_pair.GetKeyFingerprint() << std::endl;
        }
    } else {
        std::cerr << "Failed to describe key pairs:" <<
                  outcome.GetError().GetMessage() << std::endl;
    }
```

请参阅[完整示例](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/ec2/describe_key_pairs.cpp)。

## 删除密钥对
<a name="delete-a-key-pair"></a>

要删除密钥对，请调用 EC2 Client 端的`DeleteKeyPair`函数，向其传递 a [DeleteKeyPairRequest](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_delete_key_pair_request.html)，其中包含要删除的密钥对的名称。

 **包含** 

```
#include <aws/ec2/EC2Client.h>
#include <aws/ec2/model/DeleteKeyPairRequest.h>
#include <iostream>
```

 **代码** 

```
    Aws::EC2::EC2Client ec2Client(clientConfiguration);
    Aws::EC2::Model::DeleteKeyPairRequest request;

    request.SetKeyName(keyPairName);
    const Aws::EC2::Model::DeleteKeyPairOutcome outcome = ec2Client.DeleteKeyPair(
            request);

    if (!outcome.IsSuccess()) {
        std::cerr << "Failed to delete key pair " << keyPairName <<
                  ":" << outcome.GetError().GetMessage() << std::endl;
    } else {
        std::cout << "Successfully deleted key pair named " << keyPairName <<
                  std::endl;
    }
```

请参阅[完整示例](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/ec2/delete_key_pair.cpp)。

## 更多信息
<a name="more-information"></a>
+  《Amazon EC2 用户指南》中的 [Amazon EC2 密钥对](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-key-pairs.html)
+  [CreateKeyPair](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_CreateKeyPair.html)在 Amazon EC2 API 参考中
+  [DescribeKeyPairs](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DescribeKeyPairs.html)在 Amazon EC2 API 参考中
+  [DeleteKeyPair](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DeleteKeyPair.html)在 Amazon EC2 API 参考中

# 使用 Amazon EC2 中的安全组
<a name="examples-ec2-security-groups"></a>

## 先决条件
<a name="codeExamplePrereq"></a>

在开始之前，建议您先阅读[开始使用 适用于 C\$1\$1 的 AWS SDK](getting-started.md)。

下载示例代码并按[代码示例入门](getting-started-code-examples.md)中所述构建解决方案。

要运行这些示例，您的代码用于发出请求的用户配置文件必须具有适当的权限 AWS （适用于服务和操作）。有关更多信息，请参阅[提供 AWS 凭证](credentials.md)。

## 创建安全组
<a name="create-a-security-group"></a>

要创建安全组，请使用包含密钥名称的调用 EC2客户端`CreateSecurityGroup`函数。[CreateSecurityGroupRequest](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_create_security_group_request.html)

 **包含** 

```
#include <aws/ec2/EC2Client.h>
#include <aws/ec2/model/CreateSecurityGroupRequest.h>
```

 **代码** 

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

    Aws::EC2::Model::CreateSecurityGroupRequest request;

    request.SetGroupName(groupName);
    request.SetDescription(description);
    request.SetVpcId(vpcID);

    const Aws::EC2::Model::CreateSecurityGroupOutcome outcome =
            ec2Client.CreateSecurityGroup(request);

    if (!outcome.IsSuccess()) {
        std::cerr << "Failed to create security group:" <<
                  outcome.GetError().GetMessage() << std::endl;
        return false;
    }

    std::cout << "Successfully created security group named " << groupName <<
              std::endl;
```

请参阅[完整示例](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/ec2/create_security_group.cpp)。

## 配置安全组
<a name="configure-a-security-group"></a>

安全组可以控制对 Amazon EC2 实例的入站（入口）流量和出站（出口）流量。

要向您的安全组添加入口规则，请使用 EC2客户端的`AuthorizeSecurityGroupIngress`函数，在[AuthorizeSecurityGroupIngressRequest](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_authorize_security_group_ingress_request.html)对象中提供安全组的名称和要分配给它的访问规则 ([IpPermission](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_ip_permission.html))。以下示例演示如何将 IP 权限添加到安全组。

 **包含** 

```
#include <aws/ec2/model/AuthorizeSecurityGroupIngressRequest.h>
```

 **代码** 

```
    Aws::EC2::Model::AuthorizeSecurityGroupIngressRequest authorizeSecurityGroupIngressRequest;
    authorizeSecurityGroupIngressRequest.SetGroupId(groupID);
```

```
    Aws::String ingressIPRange = "203.0.113.0/24";  // Configure this for your allowed IP range.
    Aws::EC2::Model::IpRange ip_range;
    ip_range.SetCidrIp(ingressIPRange);

    Aws::EC2::Model::IpPermission permission1;
    permission1.SetIpProtocol("tcp");
    permission1.SetToPort(80);
    permission1.SetFromPort(80);
    permission1.AddIpRanges(ip_range);

    authorize_request.AddIpPermissions(permission1);

    Aws::EC2::Model::IpPermission permission2;
    permission2.SetIpProtocol("tcp");
    permission2.SetToPort(22);
    permission2.SetFromPort(22);
    permission2.AddIpRanges(ip_range);

    authorize_request.AddIpPermissions(permission2);
```

```
    Aws::EC2::Model::AuthorizeSecurityGroupIngressOutcome authorizeSecurityGroupIngressOutcome =
            ec2Client.AuthorizeSecurityGroupIngress(authorizeSecurityGroupIngressRequest);

    if (authorizeSecurityGroupIngressOutcome.IsSuccess()) {
        std::cout << "Successfully authorized security group ingress." << std::endl;
    } else {
        std::cerr << "Error authorizing security group ingress: "
                  << authorizeSecurityGroupIngressOutcome.GetError().GetMessage() << std::endl;
    }
```

要向安全组添加出口规则，请在 EC2客户端`AuthorizeSecurityGroupEgress`函数中[AuthorizeSecurityGroupEgressRequest](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_authorize_security_group_egress_request.html)提供类似的数据。

请参阅[完整示例](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/ec2/create_security_group.cpp)。

## 描述安全组
<a name="describe-security-groups"></a>

要描述您的安全组或获取有关安全组的信息，请使用调用 EC2客户端`DescribeSecurityGroups`函数[DescribeSecurityGroupsRequest](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_describe_security_groups_request.html)。

您将在结果对象[DescribeSecurityGroupsResponse](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_describe_security_groups_response.html)中收到一个，您可以使用该对象通过调用其`GetSecurityGroups`函数来访问安全组列表，该函数返回[SecurityGroup](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_security_group.html)对象列表。

 **包含** 

```
#include <aws/ec2/EC2Client.h>
#include <aws/ec2/model/DescribeSecurityGroupsRequest.h>
#include <aws/ec2/model/DescribeSecurityGroupsResponse.h>
#include <iomanip>
#include <iostream>
```

 **代码** 

```
    Aws::EC2::EC2Client ec2Client(clientConfiguration);
    Aws::EC2::Model::DescribeSecurityGroupsRequest request;

    if (!groupID.empty()) {
        request.AddGroupIds(groupID);
    }

    Aws::String nextToken;
    do {
        if (!nextToken.empty()) {
            request.SetNextToken(nextToken);
        }

        Aws::EC2::Model::DescribeSecurityGroupsOutcome outcome = ec2Client.DescribeSecurityGroups(request);
        if (outcome.IsSuccess()) {
            std::cout << std::left <<
                      std::setw(32) << "Name" <<
                      std::setw(30) << "GroupId" <<
                      std::setw(30) << "VpcId" <<
                      std::setw(64) << "Description" << std::endl;

            const std::vector<Aws::EC2::Model::SecurityGroup> &securityGroups =
                    outcome.GetResult().GetSecurityGroups();

            for (const auto &securityGroup: securityGroups) {
                std::cout << std::left <<
                          std::setw(32) << securityGroup.GetGroupName() <<
                          std::setw(30) << securityGroup.GetGroupId() <<
                          std::setw(30) << securityGroup.GetVpcId() <<
                          std::setw(64) << securityGroup.GetDescription() <<
                          std::endl;
            }
        } else {
            std::cerr << "Failed to describe security groups:" <<
                      outcome.GetError().GetMessage() << std::endl;
            return false;
        }

        nextToken = outcome.GetResult().GetNextToken();
    } while (!nextToken.empty());
```

请参阅[完整示例](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/ec2/describe_security_groups.cpp)。

## 删除安全组
<a name="delete-a-security-group"></a>

要删除安全组，请调用 EC2客户端的`DeleteSecurityGroup`函数，向其传递一个[DeleteSecurityGroupRequest](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-ec2/html/class_aws_1_1_e_c2_1_1_model_1_1_delete_security_group_request.html)包含要删除的安全组 ID 的函数。

 **包含** 

```
#include <aws/ec2/EC2Client.h>
#include <aws/ec2/model/DeleteSecurityGroupRequest.h>
#include <iostream>
```

 **代码** 

```
    Aws::EC2::EC2Client ec2Client(clientConfiguration);
    Aws::EC2::Model::DeleteSecurityGroupRequest request;

    request.SetGroupId(securityGroupID);
    Aws::EC2::Model::DeleteSecurityGroupOutcome outcome = ec2Client.DeleteSecurityGroup(request);

    if (!outcome.IsSuccess()) {
        std::cerr << "Failed to delete security group " << securityGroupID <<
                  ":" << outcome.GetError().GetMessage() << std::endl;
    } else {
        std::cout << "Successfully deleted security group " << securityGroupID <<
                  std::endl;
    }
```

请参阅[完整示例](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/ec2/delete_security_group.cpp)。

## 更多信息
<a name="more-information"></a>
+  《Amazon EC2 用户指南》中的 [Amazon EC2 安全组](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-key-pairs.html)
+  《Amazon EC2 用户指南》中的[为您的 Linux 实例授权入站流量](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/authorizing-access-to-an-instance.html)
+  [CreateSecurityGroup](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_CreateSecurityGroup.html)在 Amazon EC2 API 参考中
+  [DescribeSecurityGroups](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DescribeSecurityGroups.html)在 Amazon EC2 API 参考中
+  [DeleteSecurityGroup](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_DeleteSecurityGroup.html)在 Amazon EC2 API 参考中
+  [AuthorizeSecurityGroupIngress](https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_AuthorizeSecurityGroupIngress.html)在 Amazon EC2 API 参考中