Elastic Compute Service:Create and run commands

Console

1. Go to ECS console - ECS Cloud Assistant.

2. In the top navigation bar, select the region and resource group.

3. In the upper-right corner of the ECS Cloud Assistant page, click Create/Run Command.

4. In the Command Information section, configure the following:

   • Command content: Paste or type your script.

     To use dynamic values, enable Use Parameters and add parameters in {{parameter}} format:

     • Custom Parameters: Defined in {{parameter}} format. Assign values manually when running the command.

     • Built-in parameters: Provided by Cloud Assistant and replaced at runtime — for example, {{ACS::RegionId}} (region ID) and {{ACS::InstanceId}} (instance ID).

     #!/bin/bash
     # {{name}} is a custom parameter — assign a value when running.
     echo {{name}}
     
     # {{ACS::RegionId}} is a built-in parameter — no value needed.
     echo {{ACS::RegionId}}

     Note: Base64-encoded command payload limit: 18 KB for Run And Save, 24 KB for Run.

   • Execution Plan: Choose when to run the command.

     • *(Default)* Immediately.

     • Perform Only Dry Run: Validates request parameters, instance environment, and Cloud Assistant Agent status without running the command.

     • Run on Schedule:

       • Run at Fixed Interval: Runs at a fixed interval defined by a rate expression. Must be between 60 seconds and 7 days, and longer than the command timeout.

       • Run on Clock-based Schedule: Uses a cron expression for flexible scheduling.

   • Username: Defaults to root (Linux) or System (Windows).

   • Execution Path: The script's working directory. Defaults to /root (Linux) or C:\Windows\system32 (Windows). To change directory, add a cd command at the start of the script.

   • Timeout: Defaults to 60 seconds. Valid range: 10–86,400 seconds (24 hours).

   • Task Stop Scope: What stops when a task is terminated.

     • Command Process: Stops the script process only.

     • Command Process Tree: Stops the script process and all its child processes.

5. In the Select Instance or Select Managed Instances section, select the target instances.

   Select up to 100 instances per execution. If an expected instance is missing, verify that Cloud Assistant Agent is installed and the instance is in the Running state.

6. Click Run and Save or Run to start.

CLI