本文為英文版的機器翻譯版本，如內容有任何歧義或不一致之處，概以英文版為準。

# `MonitorInstances` 搭配 AWS SDK 或 CLI 使用
<a name="example_ec2_MonitorInstances_section"></a>

下列程式碼範例示範如何使用 `MonitorInstances`。

------
#### [ C\$1\$1 ]

**SDK for C\$1\$1**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/cpp/example_code/ec2#code-examples)中設定和執行。

```
//! Enable detailed monitoring for an Amazon Elastic Compute Cloud (Amazon EC2) instance.
/*!
  \param instanceId: An EC2 instance ID.
  \param clientConfiguration: AWS client configuration.
  \return bool: Function succeeded.
 */
bool AwsDoc::EC2::enableMonitoring(const Aws::String &instanceId,
                                   const Aws::Client::ClientConfiguration &clientConfiguration) {
    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;
    }

    return monitorInstancesOutcome.IsSuccess();
}
```
+  如需 API 詳細資訊，請參閱《適用於 C\$1\$1 的 AWS SDK  API 參考》**中的 [MonitorInstances](https://docs.aws.amazon.com/goto/SdkForCpp/ec2-2016-11-15/MonitorInstances)。

------
#### [ CLI ]

**AWS CLI**  
**啟用執行個體的詳細監控**  
此範例命令會啟用指定執行個體的詳細監控。  
命令：  

```
aws ec2 monitor-instances --instance-ids i-1234567890abcdef0
```
輸出：  

```
{
  "InstanceMonitorings": [
      {
          "InstanceId": "i-1234567890abcdef0",
          "Monitoring": {
              "State": "pending"
          }
      }
  ]
}
```
+  如需 API 詳細資訊，請參閱《AWS CLI 命令參考》**中的 [MonitorInstances](https://awscli.amazonaws.com/v2/documentation/api/latest/reference/ec2/monitor-instances.html)。

------
#### [ JavaScript ]

**適用於 JavaScript (v3) 的 SDK**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/javascriptv3/example_code/ec2#code-examples)中設定和執行。

```
import { EC2Client, MonitorInstancesCommand } from "@aws-sdk/client-ec2";

/**
 * Turn on detailed monitoring for the selected instance.
 * By default, metrics are sent to Amazon CloudWatch every 5 minutes.
 * For a cost you can enable detailed monitoring which sends metrics every minute.
 * @param {{ instanceIds: string[] }} options
 */
export const main = async ({ instanceIds }) => {
  const client = new EC2Client({});
  const command = new MonitorInstancesCommand({
    InstanceIds: instanceIds,
  });

  try {
    const { InstanceMonitorings } = await client.send(command);
    const instancesBeingMonitored = InstanceMonitorings.map(
      (im) =>
        ` • Detailed monitoring state for ${im.InstanceId} is ${im.Monitoring.State}.`,
    );
    console.log("Monitoring status:");
    console.log(instancesBeingMonitored.join("\n"));
  } catch (caught) {
    if (caught instanceof Error && caught.name === "InvalidParameterValue") {
      console.warn(`${caught.message}`);
    } else {
      throw caught;
    }
  }
};
```
+  如需 API 詳細資訊，請參閱《適用於 JavaScript 的 AWS SDK  API 參考》**中的 [MonitorInstances](https://docs.aws.amazon.com/AWSJavaScriptSDK/v3/latest/client/ec2/command/MonitorInstancesCommand)。

------
#### [ PowerShell ]

**Tools for PowerShell V4**  
**範例 1：此範例命令會啟用指定執行個體的詳細監控功能。**  

```
Start-EC2InstanceMonitoring -InstanceId i-12345678
```
**輸出：**  

```
InstanceId    Monitoring
----------    ----------
i-12345678    Amazon.EC2.Model.Monitoring
```
+  如需 API 詳細資訊，請參閱《AWS Tools for PowerShell Cmdlet 參考 (V4)》**中的 [MonitorInstances](https://docs.aws.amazon.com/powershell/v4/reference)。

**Tools for PowerShell V5**  
**範例 1：此範例命令會啟用指定執行個體的詳細監控功能。**  

```
Start-EC2InstanceMonitoring -InstanceId i-12345678
```
**輸出：**  

```
InstanceId    Monitoring
----------    ----------
i-12345678    Amazon.EC2.Model.Monitoring
```
+  如需 API 詳細資訊，請參閱《AWS Tools for PowerShell Cmdlet 參考 (V5)》**中的 [MonitorInstances](https://docs.aws.amazon.com/powershell/v5/reference)。

------
#### [ SAP ABAP ]

**適用於 SAP ABAP 的開發套件**  
 GitHub 上提供更多範例。尋找完整範例，並了解如何在 [AWS 程式碼範例儲存庫](https://github.com/awsdocs/aws-doc-sdk-examples/tree/main/sap-abap/services/ec2#code-examples)中設定和執行。

```
    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 monitor the instance without actually making the request. "
        lo_ec2->monitorinstances(
          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 monitor this instance. "
        IF lo_exception->av_err_code = 'DryRunOperation'.
          MESSAGE 'Dry run to enable detailed monitoring completed.' TYPE 'I'.
          " DryRun is set to false to enable detailed monitoring. "
          lo_ec2->monitorinstances(
            it_instanceids = lt_instance_ids
            iv_dryrun = abap_false ).
          MESSAGE 'Detailed monitoring enabled.' TYPE 'I'.
          " If the error code returned is `UnauthorizedOperation`, then you don't have the required permissions to monitor this instance. "
        ELSEIF lo_exception->av_err_code = 'UnauthorizedOperation'.
          MESSAGE 'Dry run to enable detailed monitoring failed. User does not have the permissions to monitor 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.
```
+  如需 API 詳細資訊，請參閱《適用於 SAP ABAP 的 AWS  SDK API 參考》**中的 [MonitorInstances](https://docs.aws.amazon.com/sdk-for-sap-abap/v1/api/latest/index.html)。

------

如需 AWS SDK 開發人員指南和程式碼範例的完整清單，請參閱 [使用 SDK 建立 Amazon EC2 資源 AWS](sdk-general-information-section.md)。此主題也包含有關入門的資訊和舊版 SDK 的詳細資訊。