DescribeInvocations - Elastic Compute Service - Alibaba Cloud Documentation Center

Queries the execution list and states of Cloud Assistant commands.

Operation description

After you run a command, the command may fail to run or may return unexpected results. You can call this operation to query the execution results.
You can query information about command executions within the last four weeks. Up to 100,000 pieces of execution information can be retained.
You can subscribe to Cloud Assistant task status events to obtain command execution results from the events. This helps you reduce the number of times to poll API operations and improve efficiency.
During a paged query, when you call the DescribeInvocations operation to retrieve the first page of results, set MaxResults to specify the maximum number of entries to return in the call. The return value of NextToken is a pagination token that can be used in the next call to retrieve a new page of results. When you call the DescribeInvocations operation to retrieve a new page of results, set NextToken to the NextToken value returned in the previous call and set MaxResults to specify the maximum number of entries to return in this call.
Differences between the DescribeInvocations and DescribeInvocationResults operations:
- Scenario in which the RunCommand or InvokeCommand operation is called to run a Cloud Assistant command on multiple instances:
  - The DescribeInvocations operation queries the execution status of the command on each instance and the overall execution status of the command on all instances.
  - The DescribeInvocationResults operation queries only the execution status of the command on each instance.
- Scenario in which the RunCommand or InvokeCommand operation is called to run a Cloud Assistant command on a single instance:
  - The DescribeInvocations operation is equivalent to the DescribeInvocationResults operation.
- If you want to query the status of each execution for a scheduled (recurring) task or a task that is automatically executed on instance startup (RepeatMode is set to Period or EveryReboot), you can call only the DescribeInvocationResults operation and must set IncludeHistory to true. The DescribeInvocations operation queries only the most recent execution status of the command.
- If you want to view the command content and parameters, you can call only the DescribeInvocations operation and check the CommandContent value in the response.

Debugging

You can run this interface directly in OpenAPI Explorer, saving you the trouble of calculating signatures. After running successfully, OpenAPI Explorer can automatically generate SDK code samples.

Debug

Authorization information

The following table shows the authorization information corresponding to the API. The authorization information can be used in the Action policy element to grant a RAM user or RAM role the permissions to call this API operation. Description:

Operation: the value that you can use in the Action element to specify the operation on a resource.
Access level: the access level of each operation. The levels are read, write, and list.
Resource type: the type of the resource on which you can authorize the RAM user or the RAM role to perform the operation. Take note of the following items:
- The required resource types are displayed in bold characters.
- If the permissions cannot be granted at the resource level, All Resources is used in the Resource type column of the operation.
Condition Key: the condition key that is defined by the cloud service.
Associated operation: other operations that the RAM user or the RAM role must have permissions to perform to complete the operation. To complete the operation, the RAM user or the RAM role must have the permissions to perform the associated operations.

Operation	Access level	Resource type	Condition key	Associated operation
ecs:DescribeInvocations	get	Instance `acs:ecs:{#regionId}:{#accountId}:instance/{#instanceId}` Command `acs:ecs:{#regionId}:{#accountId}:command/{#commandId}`	none	none

Request parameters

Parameter	Type	Required	Description	Example
RegionId	string	Yes	The region ID. You can call the DescribeRegions operation to query the most recent list of regions.	cn-hangzhou
ResourceGroupId	string	No	The ID of the resource group. After you set this parameter, command execution results in the specified resource group are queried.	rg-bp67acfmxazb4p****
InvokeId	string	No	The command task ID.	t-hz0jdfwd9f****
CommandId	string	No	The command ID. You can call the DescribeCommands operation to query all available command IDs.	c-hz0jdfwcsr****
CommandName	string	No	The command name. If you specify both this parameter and `InstanceId`, this parameter does not take effect.	CommandTestName
CommandType	string	No	The command type. Valid values: RunBatScript: batch command, applicable to Windows instances. RunPowerShellScript: PowerShell command, applicable to Windows instances. RunShellScript: shell command, applicable to Linux instances.	RunShellScript
Timed	boolean	No	Specifies whether the command is to be automatically run. Valid values: true: The command is run by calling the `RunCommand` or `InvokeCommand` operation with `RepeatMode` set to `Period`, `NextRebootOnly`, or `EveryReboot`. false: The command meets one of the following requirements: The command is run by calling the `RunCommand` or `InvokeCommand` operation with `RepeatMode` set to `Once`. The command task is canceled, stopped, or completed. Default value: false.	true
InvokeStatus	string	No	The overall execution status of the command task. The value of this parameter depends on the execution states of the command task on all involved instances. Valid values: Running: Scheduled task: Before you stop the scheduled execution of the command, the overall execution state is always Running. One-time task: If the command is being run on instances, the overall execution state is Running. Finished: Scheduled task: The overall execution state can never be Finished. One-time task: The execution is complete on all instances, or the execution is stopped on some instances and is complete on the other instances. Success: If the execution state on at least one instance is Success and the execution state on the other instances is Stopped or Success, the overall execution state is Success. One-time task: The execution is complete, and the exit code is 0. Scheduled task: The last execution is complete, the exit code is 0, and the specified period ends. Failed: Scheduled task: The overall execution state can never be Failed. One-time task: The execution failed on all instances. Stopped: The task is stopped. Stopping: The task is being stopped. PartialFailed: The task fails on some instances. If you specify both this parameter and `InstanceId`, this parameter does not take effect. Pending: The command is being verified or sent. If the execution state on at least one instance is Pending, the overall execution state is Pending. Scheduled: The command that is set to run on a schedule is sent and waiting to be run. If the execution state on at least one instance is Scheduled, the overall execution state is Scheduled.	Finished
InstanceId	string	No	The ID of instance N. When you specify this parameter, the system queries all the execution records of all the commands that run on the instance.	i-bp1i7gg30r52z2em****
ContentEncoding	string	No	The encoding mode of the `CommandContent` and `Output` response parameters. Valid values: PlainText: returns the original command content and command outputs. Base64: returns the Base64-encoded command content and command outputs. Default value: Base64.	PlainText
IncludeOutput	boolean	No	Specifies whether to return the command outputs in the response. true: The command outputs are returned. When this parameter is set to true, you must specify `InvokeId`, `InstanceId`, or both. false: The command outputs are not returned. Default value: false	false
PageNumber	long	No	Note This parameter will be removed in the future. We recommend that you use NextToken and MaxResults for a paged query.	1
PageSize	long	No	Note This parameter will be removed in the future. We recommend that you use NextToken and MaxResults for a paged query.	10
MaxResults	integer	No	The maximum number of entries per page. Valid values: 1 to 50. Default value: 10.	10
NextToken	string	No	The pagination token that is used in the next request to retrieve a new page of results. You must specify the token that is obtained from the previous query as the value of NextToken.	AAAAAdDWBF2
RepeatMode	string	No	The execution mode of the command. If you specify both this parameter and `InstanceId`, this parameter does not take effect. Valid values: Once: The command is immediately run. Period: The command is run on a schedule. NextRebootOnly: The command is run the next time the instances start. EveryReboot: The command is run every time the instances start. This parameter is empty by default, which indicates that commands run in all modes are queried.	Once
Tag	array<object>	No	The tags that are added to the command.
	object	No	The tag that is added to the command.
Key	string	No	The key of tag N of the command. You can specify up to 20 tag keys for the command. The tag key cannot be an empty string. If a single tag is specified to query resources, up to 1,000 resources that have this tag added can be displayed in the response. If multiple tags are specified to query resources, up to 1,000 resources that have all these tags added can be displayed in the response. To query more than 1,000 resources that have specified tags added, call the ListTagResources operation. The tag key can be up to 64 characters in length and cannot contain `http://` or `https://`. The tag key cannot start with `acs:` or `aliyun`.	TestKey
Value	string	No	The value of tag N of the command. You can specify up to 20 tag values for the command. The tag value can be an empty string. It can be up to 128 characters in length and cannot contain `http://` or `https://`.	TestValue

Response parameters

Parameter	Type	Description	Example
	object
PageSize	long	The number of entries returned on each page.	10
RequestId	string	The request ID.	473469C7-AA6F-4DC5-B3DB-A3DC0DE3****
PageNumber	long	The page number of the returned page.	1
TotalCount	long	The total number of the commands.	1
NextToken	string	A pagination token. It can be used in the next request to retrieve a new page of results.	AAAAAdDWBF2
Invocations	array<object>	Details about the command executions.
Invocation	object	The time when the command task was created.
CreationTime	string	The time when the command task was created.	2020-01-19T09:15:46Z
Frequency	string	The schedule on which the command is run.	0 /20 * * *
InvocationStatus	string	The overall execution status of the command task. The value of this parameter depends on the execution status of the command task on all the involved instances. Valid values: Pending: The command is being verified or sent. When the execution state on at least one instance is Pending, the overall execution state is Pending. Scheduled: The command that is set to run on a schedule was sent and waiting to be run. When the execution state on at least one instance is Scheduled, the overall execution state is Scheduled. Running: The command is being run on the instances. When the execution state on at least one instance is Running, the overall execution state is Running. Success: When the execution state on at least one instance is Success and the execution state on the other instances is Stopped or Success, the overall execution state is Success. One-time task: The execution was complete, and the exit code was 0. Scheduled task: The last execution was complete, the exit code was 0, and the specified period ended. Failed: When the execution state on all instances is Stopped or Failed, the overall execution state is Failed. When the execution state on an instance is one of the following values, Failed is returned as the overall execution state: Invalid: The command is invalid. Aborted: The command failed to be sent. Failed: The execution was complete, but the exit code was not 0. Timeout: The execution timed out. Error: An error occurred while the command was being run. Stopping: The command task is being stopped. When the execution state on at least one instance is Stopping, the overall execution state is Stopping. Stopped: The task was stopped. When the execution state on all instances is Stopped, the overall execution state is Stopped. When the execution state on an instance is one of the following values, Stopped is returned as the overall execution state: Cancelled: The task was canceled. Terminated: The task was terminated. PartialFailed: The execution was complete on some instances and failed on other instances. When the execution state is Success on some instances and is Failed or Stopped on the other instances, the overall execution state is PartialFailed. Note `InvokeStatus` in the response functions similarly to this parameter. We recommend that you check the value of this parameter.	Running
RepeatMode	string	The execution mode of the command. Valid values: Once: The command is immediately run. Period: The command is run on a schedule. NextRebootOnly: The command is run the next time the instances start. EveryReboot: The command is run every time the instances start.	Once
CommandId	string	The command ID.	c-hz0jdfwcsr****
CommandType	string	The command type.	RunShellScript
InvokeStatus	string	The overall execution status of the command task. Note We recommend that you ignore this parameter and check the value of `InvocationStatus` in the response to obtain the execution status.	Finished
Parameters	string	The custom parameters in the command.	{}
Timed	boolean	Indicates whether the command is to be automatically run.	false
CommandContent	string	The command content. If ContentEncoding is set to PlainText in the request, the original command content is returned. If ContentEncoding is set to Base64 in the request, the Base64-encoded command content is returned.	cnBtIC1xYSB8IGdyZXAgdnNm****
CommandName	string	The command name.	CommandTestName
CommandDescription	string	The command description.	testDescription
InvokeId	string	The command task ID.	t-hz0jdfwd9f****
Username	string	The username used to run the command on the instances.	root
WorkingDir	string	The execution path of the command.	/home/
Timeout	long	The maximum timeout period for the command execution. Unit: seconds. When a command cannot be run, the command execution times out. When a command execution times out, Cloud Assistant Agent forcefully terminates the command process by canceling the process ID (PID) of the command.	60
ContainerId	string	The container ID.	ab141ddfbacfe02d9dbc25966ed971536124527097398d419a6746873fea****
ContainerName	string	The container name.	test-container
TerminationMode	string	Indicates how the command task is stopped when a command execution is manually stopped or times out. Valid values: Process: The process of the command is stopped. ProcessTree: The process tree of the command is stopped. In this case, the process of the command and all subprocesses are stopped.	ProcessTree
Launcher	string	The launcher for script execution. The value cannot exceed 1 KB in length.	python3 -u {{ACS::ScriptFileName\|Ext(".py")}}
InvokeInstances	array<object>	The instances on which the command was run.
InvokeInstance	object	The execution states of the command.
CreationTime	string	The time when the command task was created.	2019-12-20T06:15:54Z
UpdateTime	string	The time when the execution status was updated.	2020-01-19T09:15:47Z
FinishTime	string	The time when the command process ended.	2019-12-20T06:15:56Z
InvocationStatus	string	The execution status on a single instance. Valid values: Pending: The command is being verified or sent. Invalid: The specified command type or parameter is invalid. Aborted: The command failed to be sent to the instance. To send a command to an instance, make sure that the instance is in the Running state and the command can be sent to the instance within 1 minute. Running: The command is being run on the instance. Success: One-time task: The execution was complete, and the exit code was 0. Scheduled task: The last execution was complete, the exit code was 0, and the specified period ended. Failed: One-time task: The execution was complete, but the exit code was not 0. Scheduled task: The last execution was complete, but the exit code was not 0. The specified period is about to end. Error: The execution cannot proceed due to an exception. Timeout: The execution timed out. Cancelled: The execution was canceled before it started. Stopping: The command task is being stopped. Terminated: The execution was terminated before completion. Scheduled: One-time task: The execution state can never be Scheduled. Scheduled task: The command is waiting to be run.	Success
Repeats	integer	The number of times that the command was run on the instance. If the command is set to run only once, the value is 0 or 1. If the command is set to run on a schedule, the value is the number of times that the command has been run on the instance.	0
InstanceId	string	The instance ID.	i-bp1i7gg30r52z2em****
Output	string	The command output. If ContentEncoding is set to PlainText in the request, the original command output is returned. If ContentEncoding is set to Base64 in the request, the Base64-encoded command output is returned.	OutPutTestmsg
Dropped	integer	The size of the Output text that was truncated and discarded because the Output value exceeded 24 KB in size.	0
StopTime	string	The time when the command task was stopped. If you call the `StopInvocation` operation to stop the command task, the value of this parameter is the time when the operation is called.	2020-01-19T09:15:47Z
ExitCode	long	The exit code of the execution. Valid values: For Linux instances, the value is the exit code of the shell process. For Windows instances, the value is the exit code of the batch or PowerShell process.	0
StartTime	string	The time when the command started to be run on the instance.	2019-12-20T06:15:55Z
ErrorInfo	string	The error message returned when the command failed to be sent or run. Valid values: If this parameter is empty, the command was run as expected. The security group rules denied access to the aliyun service. The specified instance does not exist. The specified instance was released during task execution. The specified instance was not running during task execution. The OS type of the instance does not support the specified command type. The specified account does not exist. The specified directory does not exist. The cron expression is invalid. The aliyun service is not running on the instance. The aliyun service in the instance does not response. The aliyun service in the instance is upgrading during task execution. The aliyun service in the instance need to be upgraded to at least version to support the feature. indicates the earliest version that supports the feature. indicates the name of the feature. The command delivery has been timeout. The command execution has been timeout. The command execution got an exception. The command execution exit code is not zero. The specified instance was released during task execution.	the specified instance does not exists
Timed	boolean	Indicates whether the command is to be automatically run.	false
ErrorCode	string	The error code for the failure to send or run the command. Valid values: If this parameter is empty, the command was run as expected. InstanceNotExists: The specified instance did not exist or was released. InstanceReleased: The instance was released while the command was being run. InstanceNotRunning: The instance was not running when the command started to be run. CommandNotApplicable: The command was inapplicable to the specified instance. AccountNotExists: The username specified to run the command did not exist. DirectoryNotExists: The specified directory did not exist. BadCronExpression: The specified cron expression for the execution schedule was invalid. ClientNotRunning: Cloud Assistant Agent was not running. ClientNotResponse: Cloud Assistant Agent did not respond. ClientIsUpgrading: Cloud Assistant Agent was being upgraded. ClientNeedUpgrade: Cloud Assistant Agent needed to be upgraded. DeliveryTimeout: The request to send the command timed out. ExecutionTimeout: The execution timed out. ExecutionException: An exception occurred while the command was being executed. ExecutionInterrupted: The command task was interrupted. ExitCodeNonzero: The execution was complete, but the exit code was not 0. SecurityGroupRuleDenied: Access to Cloud Assistant was denied by security group rules.	InstanceNotExists
InstanceInvokeStatus	string	The execution status of the command on a single instance. Note We recommend that you ignore this parameter and check the value of `InvocationStatus` in the response to obtain the execution status.	Finished
Tags	array<object>	The tags of the command task.
Tag	object	The tag of the command task.
TagKey	string	The tag key of the command task.	owner
TagValue	string	The tag value of the command task.	zhangsan

Examples

Sample success responses

JSONformat

{
  "PageSize": 10,
  "RequestId": "473469C7-AA6F-4DC5-B3DB-A3DC0DE3****",
  "PageNumber": 1,
  "TotalCount": 1,
  "NextToken": "AAAAAdDWBF2",
  "Invocations": {
    "Invocation": [
      {
        "CreationTime": "2020-01-19T09:15:46Z",
        "Frequency": "0 */20 * * * *",
        "InvocationStatus": "Running",
        "RepeatMode": "Once",
        "CommandId": "c-hz0jdfwcsr****",
        "CommandType": "RunShellScript",
        "InvokeStatus": "Finished",
        "Parameters": "{}",
        "Timed": false,
        "CommandContent": "cnBtIC1xYSB8IGdyZXAgdnNm****",
        "CommandName": "CommandTestName",
        "CommandDescription": "testDescription",
        "InvokeId": "t-hz0jdfwd9f****",
        "Username": "root",
        "WorkingDir": "/home/",
        "Timeout": 60,
        "ContainerId": "ab141ddfbacfe02d9dbc25966ed971536124527097398d419a6746873fea****",
        "ContainerName": "test-container",
        "TerminationMode": "ProcessTree",
        "Launcher": "python3 -u {{ACS::ScriptFileName|Ext(\".py\")}}",
        "InvokeInstances": {
          "InvokeInstance": [
            {
              "CreationTime": "2019-12-20T06:15:54Z",
              "UpdateTime": "2020-01-19T09:15:47Z",
              "FinishTime": "2019-12-20T06:15:56Z",
              "InvocationStatus": "Success",
              "Repeats": 0,
              "InstanceId": "i-bp1i7gg30r52z2em****",
              "Output": "OutPutTestmsg",
              "Dropped": 0,
              "StopTime": "2020-01-19T09:15:47Z",
              "ExitCode": 0,
              "StartTime": "2019-12-20T06:15:55Z",
              "ErrorInfo": "the specified instance does not exists",
              "Timed": false,
              "ErrorCode": "InstanceNotExists",
              "InstanceInvokeStatus": "Finished"
            }
          ]
        },
        "Tags": {
          "Tag": [
            {
              "TagKey": "owner",
              "TagValue": "zhangsan"
            }
          ]
        }
      }
    ]
  }
}

Error codes

HTTP status code	Error code	Error message	Description
400	RegionId.ApiNotSupported	The api is not supported in this region.	The API operation cannot be called in the specified region. Check whether the specified RegionId parameter is valid.
400	NumberExceed.Tags	The Tags parameter number is exceed.	The number of tags exceeds the maximum limit.
400	Duplicate.TagKey	The Tag.N.Key contain duplicate key.	The specified tag key already exists. Tag keys must be unique.
400	InvalidTagKey.Malformed	The specified Tag.n.Key is not valid.	The specified Tag.N.Key parameter is invalid.
400	InvalidTagValue.Malformed	The specified Tag.n.Value is not valid.	The specified tag value is invalid.
400	MissingParameter.TagKey	You must specify Tag.N.Key.	The tag key is not specified.
400	InvalidParam.PageNumber	The specified parameter is invalid.	The specified PageNumber parameter is invalid.
400	InvalidParam.PageSize	The specified parameter is invalid.	The specified PageSize parameter is invalid.
400	InvalidParameter.NextToken	The specified parameter NextToken is not valid.	The specified parameter NextToken is illegal.
400	InvalidParameter.MaxResults	The specified parameter MaxResults is not valid.	The specified parameter MaxResults is illegal.
403	Operation.Forbidden	The operation is not permitted.	The operation is not supported.
404	InvalidRegionId.NotFound	The RegionId provided does not exist in our records.	The RegionId provided does not exist
500	InternalError.Dispatch	An error occurred when you dispatched the request.	An error occurred while the request is being sent. Try again later.

For a list of error codes, visit the Service error codes.

Change history

Change time	Summary of changes	Operation
2024-12-05	API Description Update. The Error code has changed	View Change Details
2024-08-01	The Error code has changed. The response structure of the API has changed	View Change Details
2024-05-14	The Error code has changed. The response structure of the API has changed	View Change Details
2023-12-21	The Error code has changed. The request parameters of the API has changed. The response structure of the API has changed	View Change Details
2023-05-12	The Error code has changed	View Change Details
2022-07-07	The Error code has changed. The response structure of the API has changed	View Change Details
2022-06-22	The Error code has changed. The response structure of the API has changed	View Change Details
2021-05-12	The Error code has changed	View Change Details