Enterprise Distributed Application Service:Call an API operation to roll back an application that is deployed in a Kubernetes cluster to a historical version

Roll back an application to a historical version

The following sample code provides an example on how to roll back an application to a historical version:

import com.aliyuncs.DefaultAcsClient;
import com.aliyuncs.exceptions.ClientException;
import com.aliyuncs.exceptions.ServerException;
import com.aliyuncs.profile.DefaultProfile;
import com.aliyuncs.edas.model.v20170801.DeployK8sApplicationRequest;
import com.aliyuncs.edas.model.v20170801.DeployK8sApplicationResponse;

public class DeployK8sApplication {

    public static void main(String[] args)  {
        // The AccessKey pair of an Alibaba Cloud account has permissions on all API operations. Using these credentials to perform operations in EDAS is a high-risk operation. We recommend that you use a Resource Access Management (RAM) user to call API operations or perform routine O&M. To create a RAM user, log on to the RAM console. 
        // In this sample code, the AccessKey ID and AccessKey secret are included in the environment variables. You can save your AccessKey ID and AccessKey secret to your configuration file. 
        // To prevent key leaks, we recommend that you do not include your AccessKey ID and AccessKey secret in the code. 
        String aliyun_user_ak = System.getenv("ACCESS_KEY_ID");
        String aliyun_user_sk = System.getenv("ACCESS_KEY_SECRET");
        // The ID of the region where the application resides. 
        String region_id = "cn-hangzhou";

        DefaultProfile defaultProfile = DefaultProfile.getProfile(region_id, aliyun_user_ak, aliyun_user_sk);
        DefaultAcsClient client = new DefaultAcsClient(defaultProfile);

        // Initiate an API request and configure the related parameters. 
        DeployK8sApplicationRequest request = new DeployK8sApplicationRequest();
        // The ID of the application. 
        request.setAppId("6bbc57a2-a017-4bec-b521-49a15bd3****");
        // The value of the PackageVersion.Id parameter that is returned after you call the ListHistoryDeployVersion operation. 
        request.setPackageVersionId("e4aeb2972cde64d5ff0618966102****");

        // The number of pods. 
        request.setReplicas(4);
        // The CPU quota and the memory quota of the pods. The value 0 indicates that no limits are specified. 
        request.setCpuLimit(0);
        request.setMemoryLimit(0);
        request.setCpuRequest(0);
        request.setMemoryRequest(0);
        // The minimum number of CPU cores that are required. Unit: cores. The value 0 indicates that the minimum number of CPU cores has no limit. 
        request.setMcpuRequest(0);
        // The maximum number of CPU cores that are allowed. Unit: cores. The value 0 indicates that the maximum number of CPU cores has no limit. 
        request.setMcpuLimit(0);

        // The description of the change record. 
        request.setChangeOrderDesc("Roll back to a historical version");

        try {
            DeployK8sApplicationResponse response = client.getAcsResponse(request);
            System.out.println("ChangeOrderId=" + response.getChangeOrderId() + "\nMessage=" + response.getMessage());
        } catch (ServerException e) {
            e.printStackTrace();
        } catch (ClientException e) {
            e.printStackTrace();
        }
    }
}

ChangeOrderId=1b0bec74-7ec3-43f7-b9c8-f8e746d2****
Message=success

Check the result

After you roll back the application to a historical version, you can call the GetChangeOrderInfo operation to view the change details and change status of the application. For more information about specific API parameters, see GetChangeOrderInfo.

{
  "Message": "success",
  "RequestId": "3E9C6941-3945-4D43-9CBE-12CAB45569AA",
  "Code": 200,
  "changeOrderInfo": {
    "Status": 2,
    "Desc": "Roll back to a historical version",
    "PipelineInfoList": {
      "PipelineInfo": [
        {
          "PipelineStatus": 2,
          "PipelineName": "Batch 1 Change",
           ...... 
           "TaskMessage": "Apply success. <br>application is ready at desired state, version: 22"
           ......
           // The sample response is incomplete and is only for reference.