Elastic Compute Service:再生するプリエンプティブルインスタンスからカスタムイメージを作成し、そのカスタムイメージから新しいインスタンスを作成してプリエンプティブルインスタンスのデータを復元します。

注意事項

プリエンプティブルインスタンスに対して割り込みイベントがトリガーされた後、インスタンスが完全に要求される少なくとも5分前に通知が送信されます。 ただし、データの復元に必要な時間は、インスタンスのイメージタイプとシステムディスクのサイズによって異なります。 システムディスクのサイズが大きいほど、データの復元に時間がかかります。 サンプルコードを使用する前に、データ復元の効果を評価して確認してください。

手順1: プリエンプティブルインスタンスの作成

このステップでは、CreateSpotInstance Javaクラスが使用されます。 次のサンプルコードは、RunInstances操作を呼び出してプリエンプティブルインスタンスを作成する方法の例を示しています。

import com.aliyun.ecs20140526.Client;
import com.aliyun.ecs20140526.models.RunInstancesRequest;
import com.aliyun.ecs20140526.models.RunInstancesResponse;

public class CreateSpotInstance {
    static Client client;
    // Specify the ID of the region in which to create the preemptible instance.  
    static String regionId = "cn-hangzhou";
    // Specify the ID of the zone in which to create the preemptible instance.  
    static String zoneId = "cn-hangzhou-i";
    // Specify the instance type of the preemptible instance. 
    static String instanceType = "ecs.e-c1m1.large";
    // Specify the ID of the image to use to create the preemptible instance. 
    static String imagesId = "aliyun_3_9_x64_20G_alibase_20231219.vhd";
    // Specify the ID of the vSwitch to which to connect the preemptible instance. 
    static String vSwitchId = "<your-vSwitchId>";
    // Specify the ID of the security group to which to assign the preemptible instance. 
    static String securityGroupId = "<your-securityGroupId>";
    // Specify a preemption policy. 
    static String spotStrategy = "SpotAsPriceGo";
    // Specify the protection period of the preemptible instance. If you cannot determine the protection period, set the value to 0. 
    static Integer spotDuration = 0;
    // Specify the logon password of the preemptible instance. 
    static String password = "<your-password>";

    public static void main(String[] args) throws Exception {
        client = createClient();
        createInstance();
    }

    private static Client createClient() throws Exception {
        // If the project code is leaked, the AccessKey pair may be leaked and the security of all resources in your account may be compromised. The following sample code is provided for reference only. 
        com.aliyun.teaopenapi.models.Config config = new com.aliyun.teaopenapi.models.Config()
            // Required. Make sure that the ALIBABA_CLOUD_ACCESS_KEY_ID environment variable is configured in the code runtime environment. 
            .setAccessKeyId(System.getenv("ALIBABA_CLOUD_ACCESS_KEY_ID"))
            // Required. Make sure that the ALIBABA_CLOUD_ACCESS_KEY_SECRET environment variable is configured in the code runtime environment. 
            .setAccessKeySecret(System.getenv("ALIBABA_CLOUD_ACCESS_KEY_SECRET"));
        // Specify an endpoint. For information about endpoints, see the topic at the following URL: https://api.alibabacloud.com/product/Ecs.
        config.endpoint = "ecs-cn-hangzhou.aliyuncs.com";
        return new Client(config);
    }

    // Create a preemptible instance. 
    public static String createInstance() {
        try {
            // Configure the parameters of the RunInstances operation and send the request. 
            RunInstancesRequest request = new RunInstancesRequest();
            request.setRegionId(regionId);
            request.setZoneId(zoneId);
            request.setInstanceType(instanceType);
            request.setSpotDuration(spotDuration);
            request.setSpotStrategy(spotStrategy);
            request.setImageId(imagesId);
            request.setVSwitchId(vSwitchId);
            request.setSecurityGroupId(securityGroupId);
            // The preemption policy takes effect only when the InstanceChargeType parameter is set to PostPaid. 
            request.setInstanceChargeType("PostPaid");
            request.setPassword(password);
            request.setInternetMaxBandwidthOut(1);
            // Obtain the response and the instance ID. 
            RunInstancesResponse response = client.runInstances(request);
            if (null == response.getBody().getInstanceIdSets() || response.getBody().getInstanceIdSets().getInstanceIdSet().isEmpty()) {
                return null;
            }
            String instanceId = response.getBody().getInstanceIdSets().getInstanceIdSet().get(0);
            System.out.println("<Instance ID>:" + instanceId);
            return instanceId;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
}

ステップ2: 中断イベントが検出された後にカスタムイメージを自動的に作成する

import com.aliyun.ecs20140526.Client;
import com.aliyun.ecs20140526.models.CreateImageRequest;
import com.aliyun.ecs20140526.models.CreateImageResponse;
import com.aliyun.ecs20140526.models.DescribeImagesRequest;
import com.aliyun.ecs20140526.models.DescribeImagesResponse;
import com.aliyun.ecs20140526.models.DescribeImagesResponseBody.DescribeImagesResponseBodyImagesImage;
import com.aliyun.ecs20140526.models.DescribeInstancesRequest;
import com.aliyun.ecs20140526.models.DescribeInstancesResponse;
import com.aliyun.ecs20140526.models.DescribeInstancesResponseBody.DescribeInstancesResponseBodyInstances;
import com.aliyun.ecs20140526.models.DescribeInstancesResponseBody.DescribeInstancesResponseBodyInstancesInstance;
import com.aliyun.ecs20140526.models.DescribeInstancesResponseBody.DescribeInstancesResponseBodyInstancesInstanceOperationLocksLockReason;
import com.google.common.collect.Lists;
import org.apache.commons.collections4.CollectionUtils;

import java.util.List;

import com.alibaba.fastjson.JSON;

public class CreateSpotImage {
    static Client client;
    // Specify the region ID of the preemptible instance. 
    static String regionId = "cn-hangzhou";
    // Specify the ID of the preemptible instance. 
    static String instanceId = "<your-instanceId>";

    public static void main(String[] args) throws Exception {
        client = createClient();
        // Step 1: Wait for the preemptible instance to enter the To Be Released state and an interruption event to be generated. 
        waitForInstanceMarked();
        System.out.println("spot instance will be recycled immediately, instance id:" + instanceId);
        // Step 2: Create a custom image from the preemptible instance when an interruption event is triggered for the preemptible instance. 
        String image1 = createImage();
        // Step 3: Wait until the custom image is created. 
        waitCreateImageSuccess(image1);
    }

    private static Client createClient() throws Exception {
        // If the project code is leaked, the AccessKey pair may be leaked and the security of all resources in your account may be compromised. The following sample code is provided for reference only. 
        com.aliyun.teaopenapi.models.Config config = new com.aliyun.teaopenapi.models.Config()
            // Required. Make sure that the ALIBABA_CLOUD_ACCESS_KEY_ID environment variable is configured in the code runtime environment. 
            .setAccessKeyId(System.getenv("ALIBABA_CLOUD_ACCESS_KEY_ID"))
            // Required. Make sure that the ALIBABA_CLOUD_ACCESS_KEY_SECRET environment variable is configured in the code runtime environment. 
            .setAccessKeySecret(System.getenv("ALIBABA_CLOUD_ACCESS_KEY_SECRET"));
        // Specify an endpoint. For information about endpoints, see the topic at the following URL: https://api.alibabacloud.com/product/Ecs.
        config.endpoint = "ecs-cn-hangzhou.aliyuncs.com";
        return new Client(config);
    }

    // Monitor the status of the preemptible instance and obtain the details of the instance when an interruption event occurs. 
    public static void waitForInstanceMarked() {
        // Convert the instance ID to a JSON string. 
        List<String> instanceIds = Lists.newArrayList();
        instanceIds.add(instanceId);
        String instanceIdStr = JSON.toJSONString(instanceIds);
        boolean isMarked = false;
        // Determine whether an interruption event occurs on the preemptible instance. 
        while (!isMarked) {
            try {
                // Configure the parameters of the DescribeInstances operation and send the request. 
                DescribeInstancesRequest request = new DescribeInstancesRequest();
                // Specify the region ID of the preemptible instance. 
                request.setRegionId(regionId);
                // Specify the ID of the preemptible instance to query the details of the instance. 
                request.setInstanceIds(instanceIdStr);
                // Obtain the response. 
                DescribeInstancesResponse response = client.describeInstances(request);
                // Obtain the response data of the preemptible instance. 
                DescribeInstancesResponseBodyInstances instances = response.getBody().getInstances();
                // If the details of the instance are not found, break out of the loop. 
                if (CollectionUtils.isEmpty(instances.getInstance())) {
                    break;
                }
                DescribeInstancesResponseBodyInstancesInstance instance = instances.getInstance().get(0);
                // If the instance is not interrupted, restart the loop. 
                if (instance.getOperationLocks() == null || instance.getOperationLocks().getLockReason().size() == 0) {
                    continue;
                }
                for (DescribeInstancesResponseBodyInstancesInstanceOperationLocksLockReason lockReason : instance
                    .getOperationLocks().getLockReason()) {
                    // If the instance is interrupted, the ID of the instance and the cause of the interruption are displayed. 
                    System.out.println("instance:" + instance.getInstanceId() + "-->lockReason:" + lockReason.getLockReason() + ",vmStatus:" + instance.getStatus());
                    if ("Recycling".equals(lockReason.getLockReason())) {
                        isMarked = true;
                    }
                }

                Thread.sleep(2 * 1000);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    // Create a custom image. 
    public static String createImage() {
        try {
            // Configure the parameters of the CreateImage operation and send the request. 
            CreateImageRequest request = new CreateImageRequest();
            request.setRegionId(regionId);
            request.setInstanceId(instanceId);
            // Obtain the response and the image ID. 
            CreateImageResponse response = client.createImage(request);
            System.out.println("imageID:" + response.getBody().getImageId());
            return response.getBody().getImageId();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }

    // Check whether the custom image is created. 
    public static void waitCreateImageSuccess(String imageId) {
        boolean isSuccess = false;
        while (!isSuccess) {
            DescribeImagesResponseBodyImagesImage image = describeImage(imageId);
            if (null == image) {
                System.err.println("image not exist. imageId: " + imageId);
                break;
            }
            if ("Available".equals(image.getStatus())) {
                System.out.println("Image created successfully.");
                isSuccess = true;
            }
        }
    }

    // Call the DescribeImages operation to query the status of the custom image. 
    public static DescribeImagesResponseBodyImagesImage describeImage(String imageId) {
        try {
            Thread.sleep(6 * 60 * 1000);
            DescribeImagesRequest imagesRequest = new DescribeImagesRequest();
            imagesRequest.setRegionId(regionId);
            imagesRequest.setImageId(imageId);
            imagesRequest.setPageSize(100);
            DescribeImagesResponse imagesResponse = client.describeImages(imagesRequest);
            if (null == imagesResponse.getBody().getImages() || CollectionUtils.isEmpty(imagesResponse.getBody().getImages().getImage())) {
                return null;
            }
            return imagesResponse.getBody().getImages().getImage().get(0);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
}

手順3: カスタムイメージを使用してプリエンプティブルインスタンスを作成し、データを復元する

このステップでは、CreateSpotInstanceFromImage Javaクラスが使用されます。 次のサンプルコードは、RunInstances操作を呼び出して、カスタムイメージを使用してプリエンプティブルインスタンスを作成する方法の例を示しています。

import com.aliyun.ecs20140526.Client;
import com.aliyun.ecs20140526.models.RunInstancesRequest;
import com.aliyun.ecs20140526.models.RunInstancesResponse;

public class CreateSpotInstanceFromImage {
    static Client client;
    // Specify the ID of the region in which to create the instance. We recommend that you create the instance in the same region as the source preemptible instance. 
    static String regionId = "cn-hangzhou";
    // Specify the ID of the zone in which to create the instance. We recommend that you create the instance in the same zone as the source preemptible instance. 
    static String zoneId = "cn-hangzhou-i";
    // Specify the instance type of the preemptible instance. 
    static String instanceType = "ecs.s6-c1m1.small";
    // Specify the ID of the custom image. 
    static String imagesId = "<your-imagesId>";
    // Specify the ID of the vSwitch to which to connect the preemptible instance. 
    static String vSwitchId = "<your-vSwitchId>";
    // Specify the ID of the security group to which to assign the preemptible instance. 
    static String securityGroupId = "<your-securityGroupId>";
    // Specify a preemption policy. 
    static String spotStrategy = "SpotAsPriceGo";
    // Specify the protection period of the preemptible instance. If you cannot determine the protection period, set the value to 0. 
    static Integer spotDuration = 0;
    // Specify the logon password of the preemptible instance. 
    static String password = "<your-password>";


    public static void main(String[] args) throws Exception {
        client = createClient();
        createInstance();
    }

    private static Client createClient() throws Exception {
        // If the project code is leaked, the AccessKey pair may be leaked and the security of all resources in your account may be compromised. The following sample code is provided for reference only. 
        com.aliyun.teaopenapi.models.Config config = new com.aliyun.teaopenapi.models.Config()
            // Required. Make sure that the ALIBABA_CLOUD_ACCESS_KEY_ID environment variable is configured in the code runtime environment. 
            .setAccessKeyId(System.getenv("ALIBABA_CLOUD_ACCESS_KEY_ID"))
            // Required. Make sure that the ALIBABA_CLOUD_ACCESS_KEY_SECRET environment variable is configured in the code runtime environment. 
            .setAccessKeySecret(System.getenv("ALIBABA_CLOUD_ACCESS_KEY_SECRET"));
        // Specify an endpoint. For information about endpoints, see the topic at the following URL: https://api.alibabacloud.com/product/Ecs.
        config.endpoint = "ecs-cn-hangzhou.aliyuncs.com";
        return new Client(config);
    }

    //Call the RunInstances operation to create an instance. 
    public static String createInstance() {
        try {
            RunInstancesRequest request = new RunInstancesRequest();
            request.setRegionId(regionId);
            request.setZoneId(zoneId);
            request.setInstanceType(instanceType);
            request.setSpotDuration(spotDuration);
            request.setSpotStrategy(spotStrategy);
            request.setImageId(imagesId);
            request.setVSwitchId(vSwitchId);
            request.setSecurityGroupId(securityGroupId);
            request.setInstanceChargeType("PostPaid");
            request.setPassword(password);
            request.setInternetMaxBandwidthOut(1);
            RunInstancesResponse response = client.runInstances(request);
            if (null == response.getBody().getInstanceIdSets() || response.getBody().getInstanceIdSets().getInstanceIdSet().isEmpty()) {
                return null;
            }
            String instanceId = response.getBody().getInstanceIdSets().getInstanceIdSet().get(0);
            System.out.println("<Instance ID>: " + instanceId);;
            return instanceId;
        } catch (Exception e) {
            e.printStackTrace();
        }
        return null;
    }
}