You can configure local storage to mount the files or directories in the file system of a host to a pod.

Background information

In a Container Service for Kubernetes (ACK) cluster of Enterprise Distributed Application Service (EDAS), you can configure local storage by using the hostPath volume that allows containers to store files by using the high-speed file system of the host.

Configure local storage when you create an application

  1. Log on to the EDAS console.
  2. In the left-side navigation pane, click Applications. In the top navigation bar, select a region. On the Applications page, select a namespace in the upper part and click Create Application in the upper-left corner.
  3. In the Basic Information step, specify Cluster Type and Application Runtime Environment, and click Next.
    Parameter Description
    Cluster Type Select Kubernetes Clusters.
    Application Runtime Environment Select an application runtime environment based on the type of the hosted application.
    • Java
      • Custom: Select this option if you want to use a custom image to deploy the application in a Kubernetes cluster.
      • Java: Select this option if you want to use a universal JAR package to deploy the application as a Dubbo or a Spring Boot application. You can specify the Java Environment parameter after you select this option.
      • Tomcat: Select this option if you want to use a universal WAR package to deploy the application as a Dubbo or a Spring application. You can specify the Java Environment and Container Version parameters after you select this option.
      • EDAS-Container (HSF): Select this option if you want to use a WAR or FatJar package to deploy the application as a High-Speed Service Framework (HSF) application. You can specify the Java Environment, Pandora Version, and Ali-Tomcat Version parameters after you select this option.
    • PHP: Select this option if you want to run this application as a PHP application on Apache HTTP Server.
    • Node.js, C ++, Go, and Other Languages: Select this option if you want to use a custom image to deploy the application in a Kubernetes cluster. The configuration process for multi-language applications is not described in this topic. For more information, see Use images to deploy microservice-oriented multi-language applications in Kubernetes clusters.
  4. In the Configurations step, configure the environment information, basic information, deployment method, and resource parameters for the application, and click Next.
  5. In the Advanced Settings step, click Local Storage and configure local storage as needed.

    Local storage supports Local File of Host and emptyDir.

    • Local File of Host
      File Type Value Description
      Default Empty string Indicates that the file is directly mounted without a file type check.
      (Create) File Directory DirectoryOrCreate The file directory. If no file directory exists, a directory is created.
      File Directory Directory The file directory. If no file directory exists, container startup fails.
      (Create) File FileOrCreate The file. If no file exists, a file is created.
      File File The file. If no file exists, container startup fails.
      Socket Socket The standard UNIX Socket file. If no file exists, container startup fails.
      CharDevice CharDevice The character device file. If no file exists, container startup fails.
      BlockDevice BlockDevice The block storage device file. If no file exists, container startup fails.
    • emptyDir

      Volumes of the emptyDir type are used for data sharing among temporary spaces or different containers.

      Parameter Description
      Mount Mode The mount mode. Valid values: Read/Write and Read-only.
      Mount Path The mount path of emptyDir volumes.
      subPathExpr The field that is used to build the directory name of subPath volumes.
  6. Click Create Application.
  7. In the Creation Completed step, confirm the settings in Basic Information, Configurations, and Advanced Settings, and click Create Application.
    In the upper part of the Application Overview page, click View Details. On the Change List page, you can view the change process. Wait a few minutes until the application is deployed. After the change process is complete, view the running status of the instances in the Basic Information section of the Application Overview page. If the pod that runs the application is in the running state, the application is deployed.

Configure local storage when you update an application

You can configure local storage when you create an application, or configure or update local storage when you deploy an application.

  1. Log on to the EDAS console.
  2. In the left-side navigation pane, click Applications. In the top navigation bar, select a region. On the Applications page, select a namespace in the upper part, and select Container Service or Serverless Kubernetes Cluster from the Cluster Type drop-down list. Then, find the application that you want to deploy, and click the application name.
  3. On the Application Overview or Basic Information page, choose Deploy > Deploy in the upper-right corner.
  4. On the Select Deployment Mode page, select a deployment mode and click Start Deployment in the upper-right corner of the specified deployment mode section.
  5. Set the environment and deployment package for an application, click Local Storage, complete the configuration as needed, and then click OK.

    Local storage supports Local File of Host and emptyDir.

    Notice The application is restarted after you click OK. We recommend that you perform this operation during off-peak hours.
    • Local File of Host
      File Type Value Description
      Default Empty string Indicates that the file is directly mounted without a file type check.
      (Create) File Directory DirectoryOrCreate The file directory. If no file directory exists, a directory is created.
      File Directory Directory The file directory. If no file directory exists, container startup fails.
      (Create) File FileOrCreate The file. If no file exists, a file is created.
      File File The file. If no file exists, container startup fails.
      Socket Socket The standard UNIX Socket file. If no file exists, container startup fails.
      CharDevice CharDevice The character device file. If no file exists, container startup fails.
      BlockDevice BlockDevice The block storage device file. If no file exists, container startup fails.
    • emptyDir

      Volumes of the emptyDir type are used for data sharing among temporary spaces or different containers.

      Parameter Description
      Mount Mode The mount mode. Valid values: Read/Write and Read-only.
      Mount Path The mount path of emptyDir volumes.
      subPathExpr The field that is used to build the directory name of subPath volumes.

Verify the result

  • Method 1

    In the left-side navigation pane of the application details page, click Change Records to view the change details of the application. If the value in the Change Status column is Success, the application is deployed and the configuration takes effect.

  • Method 2

    On the Application Overview page, click Running Pods (Click View) next to Running Status. In the Pod section of the App Configurations panel, check the Status column of the pod. If a green dot appears, the application is in the running state. This means that the application is deployed as expected and the configuration takes effect.