Detailed explanation of the calling steps for implementing Huawei Cloud Server ECS interface in Java

Detailed explanation of the calling steps for implementing Huawei Cloud Server ECS interface in Java

Introduction:
With the rapid development of cloud computing, more and more enterprises and developers have begun to deploy their applications to on cloud servers to improve flexibility and scalability. As a leading domestic cloud service provider, Huawei Cloud provides developers with a series of powerful cloud server ECS interfaces to facilitate developers to operate and manage cloud server resources. This article will introduce how to use Java language to call the ECS interface of Huawei Cloud Server.

1. Preparation:
First, we need to create an IAM user on the Huawei Cloud platform and authorize the corresponding ECS ​​interface access permissions for the user. Create an IAM user in the Huawei Cloud Management Console and obtain the Access Key and Secret Key. This pair of keys will be used for authentication of API requests.

2. Create a Java project:
Create a new Java project in the IDE and introduce the Huawei Cloud Java SDK. Huawei Cloud Java SDK provides a wealth of interfaces and tools to facilitate developers to operate and manage Huawei Cloud services. You can download the latest version of Java SDK from the Huawei Cloud official website and import it into your Java project.

3. Write code:
Next, we need to write Java code to implement the call of the Huawei Cloud Server ECS interface. First, we need to create an ECSClient object and set the API access key.

import com.huawei.cloud.ecs.v1.EcsClient;
import com.huawei.cloud.ecs.v1.model.CreateServersRequestBody;
import com.huawei.cloud.ecs.v1.model.CreateServersResponse;
import com.huawei.cloud.ecs.v1.model.CreateServersRequestBody.Server;
import com.huawei.cloud.ecs.v1.model.ServerName;
import java.util.ArrayList;
import java.util.List;

public class ECSExample {
  public static void main(String[] args) {
    // 创建ECSClient对象并设置访问密钥
    EcsClient ecsClient = EcsClient.newBuilder()
        .withCredential("Access Key", "Secret Key")
        .withRegion("cn-north-1") // 设置区域
        .build();

    // 创建一个云服务器
    CreateServersRequestBody createServersRequestBody = new CreateServersRequestBody();
    List<Server> servers = new ArrayList<>();
    Server server = new Server();
    server.setFlavorRef("s3.large.2");
    server.setAvailabilityZone("cn-north-1a");
    server.setImageRef("a72b8bbb-80cd-4e23-9b78-6128e35e666f");
    server.setRootVolume(createRootVolume());
    server.setServerTags(createServerTags());
    server.setPublicIp(createPublicIp());
    server.setServerName(new ServerName().name("test-server"));
    servers.add(server);
    createServersRequestBody.setServers(servers);

    CreateServersResponse createServersResponse = ecsClient.createServers(createServersRequestBody);
    System.out.println(createServersResponse.getServers());
  }

  // 创建云服务器的根卷
  private static CreateServersRequestBody.RootVolume createRootVolume() {
    CreateServersRequestBody.RootVolume rootVolume = new CreateServersRequestBody.RootVolume();
    rootVolume.setVolumetype("SATA");
    rootVolume.setSize(40);
    return rootVolume;
  }

  // 创建云服务器的标签
  private static CreateServersRequestBody.ServerTags createServerTags() {
    CreateServersRequestBody.ServerTags serverTags = new CreateServersRequestBody.ServerTags();
    return serverTags;
  }

  // 创建云服务器的公网IP
  private static CreateServersRequestBody.PublicIp createPublicIp() {
    CreateServersRequestBody.PublicIp publicIp = new CreateServersRequestBody.PublicIp();
    publicIp.setEip(createEip());
    return publicIp;
  }

  // 创建EIP（弹性公网IP）
  private static CreateServersRequestBody.PublicIp.Eip createEip() {
    CreateServersRequestBody.PublicIp.Eip eip = new CreateServersRequestBody.PublicIp.Eip();
    eip.setType("5_bgp");
    return eip;
  }
}

4. Run the code:
After setting the access key, region and other parameters, we can run the code and view the console output. If everything goes well, you will see that the API call to create the cloud server is successful and the corresponding server instance information is returned.

Summary:
This article introduces how to use Java language to call the ECS interface of Huawei Cloud Server. By using Huawei Cloud Java SDK, we can easily operate and manage cloud server resources and achieve automated deployment and expansion. I hope this article will be helpful to developers in using and developing cloud servers on Huawei Cloud.

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