Background information
If you need to perform O&M operations at a specific point in time, you can use the OOS Scheduled O&M feature to easily accomplish this. Currently supported scheduling types include executing once at a specified time and periodic repeated execution.
Procedure
Log on to the OOS console.
In the left-side navigation pane, choose . On the Scheduled Tasks page, click Create.
Select a Scheduled Task Type.
Select Executed Once At The Specified Time to execute the task once at the specified time.

If you select periodic repeated execution, you need to set the Repetition Period and Period Effective And End Time.
Repetition Period: You can determine how to trigger the task within the effective period by customizing a CRON Expression. For more information about setting CRON expressions for CloudOps Orchestration Service, see Using CRON expressions.
Period Effective and End Time: This determines the entire effective period of the scheduled task.

Next, Select Template. There are two types of templates that you can Select: Public Template and My Template. In this example, a Public Template is selected.

Finally, Configure Template Parameters in the same way as configuring parameters for a regular template.

For Permissions, select Specified RAM Role.
Click Create. In the dialog box that appears, confirm the parameter settings and click OK.

On the Task Execution Management page, you can view the execution that you just created. If the execution is created successfully and the execution status is Waiting, the scheduled O&M task is created successfully.
To learn more about the execution, you can click Details for the execution to view the Execution Logs.