Elastic Compute Service
Elastic Compute Service
Elastic Compute Service
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- Documentation
Elastic Compute ServiceElastic Compute ServiceUser GuideO&MProcess choreographyManaging custom templatesAppendixActionsAtomic actions
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Atomic actions
Copy pageDownload PDFAtomic actions
This topic introduces demos related to atomic actions.
API actions
API-related actions include VOS::ExecuteAPI, VOS::WaitFor, and VOS::CheckFor.
VOS::ExecuteAPI example
{
"Tasks": [
{
"Name": "RebootInstance",
"Description": "{\"zh-cn\":\"Restart Instance\",\"en\":\"RebootInstance\"}",
"Action": "VOS::ExecuteAPI",
"Parameters": {
"APIInfo": {
"Service": "ecs",
"APIName": "RebootInstance",
"Version": "2020-04-01",
"Parameters": {
"ForceStop": "Value1",
"InstanceId": "Value2"
}
}
},
"Outputs": {
"Result1": {
"Type": "List",
"Value": [
]
}
}
}
]
}
VOS::WaitFor example
{
"Tasks": [
{
"Name": "untilInstanceRunningOrStopped",
"Description": "Wait for the ECS instance to reach the running or stopping state",
"Action": "VOS::WaitFor",
"Parameters": {
"APIInfo": {
"Service": "ecs",
"APIName": "DescribeInstances",
"Version": "2020-04-01",
"Parameters": {
"InstanceIds": "{{ [.\"describeVolumeStatus.attachedInstanceId\"] }}"
},
"DesiredValues": [
"RUNNING",
"STOPPED"
],
"NotDesiredValues": [
"STOPPING"
],
"ValueSelector": "{{ [.Instances[].Status] }}"
}
}
}
]
}
VOS::CheckFor example
{
"Tasks": [
{
"Name": "checkInstanceReady",
"Description": "Check instance status",
"Action": "VOS::CheckFor",
"Parameters": {
"APIInfo": {
"Service": "ecs",
"APIName": "DescribeInstances",
"Version": "2020-04-01",
"Parameters": {
"InstanceIds": "{{ [.instanceId] }}"
},
"DesiredValues": [
"RUNNING",
"STOPPED"
],
"NotDesiredValues": [
"ERROR"
],
"ValueSelector": "{{ [.Instances[].Status] }}"
}
}
}
]
}
PeriodTriggerInfo (trigger type)
VOS::PeriodicTrigger example
{
"Tasks": [
{
"Name": "periodicTask",
"Action": "VOS::PeriodicTrigger",
"Description": "Trigger tasks on schedule by specifying the task type and cycle expression",
"Parameters": {
"PeriodTriggerInfo": {
"RepeatMode": "{{ .repeatMode }}",
"LaunchTime": "{{ .launchTime }}",
"RecurrenceEndTime": "{{ .recurrenceEndTime }}",
"Frequency": "{{ .frequency }}"
}
}
}
]
}
ChoiceInfo (control type)
ChoiceInfo includes VOS::Choice and VOS::SelectTargetInstances.
VOS::Choice example
{
"Tasks": [
{
"Name": "whetherToDeleteLaunchTemplateVersion",
"Description": "Whether to delete the original latest version of the startup template",
"Action": "VOS::Choice",
"Parameters": {
"ChoiceInfo": {
"Condition": [
{
"When": {
"FN::Equals": [
"{{ .deleteSourceTemplateVersion }}",
true
]
},
"Next": "whetherToModifyTemplateDefaultVersion"
}
],
"Default": "VOS::END"
}
}
}
]
}
VOS::SelectTargetInstances example
Custom Action template
{
"Parameters": {
"targets":{
"Type":"Map"
}
"ForceStop": {
"Type": "Boolean"
}
},
"Tasks": [
{
"Name": "getInstance",
"Action": "VOS::SelectTargetInstances",
"Parameters": {
"Filters": "{{ targets }}"
},
"Outputs": {
"instanceIds": {
"Type": "List",
"ValueSelector": "Instances.Instance[].InstanceId"
}
},
"Description": "{\"zh-cn\":\"Select Instance\",\"en\":\"SelectTargetInstances\"}"
},
{
"Name": "RebootInstances",
"ActionId": "ac-ycc8brgqe5f10****",
"Parameters": {
"InstanceId": "{{ VOS::LoopItem }}",
"ForceStop": "{{ .ForceStop }}"
},
"Outputs": {
"InstanceStatus": {
"Type": "String",
"Value": "{{ .InstanceStatus }}"
}
},
"Loop": {
"LoopItem": "{{ getInstance.instanceIds }}",
"Outputs": {
"LoopInstanceStatus": {
"SelectedOutputFiled": "InstanceStatus"
}
},
"Concurrency": 1
},
"Description": "{\"zh-cn\":\"Batch restart instances\",\"en\":\"RebootInstances\"}"
}
],
"Outputs": {
"InstanceStatus": {
"Type": "List",
"Value": "{{ .\"RebootInstances.LoopInstanceStatus\" }}"
}
}
}
Specify parameters for invoking the template:
Type specifies the method for selecting instances. Valid values:
- Tags: Select instances based on key-value pairs of tags.
- Project: Select all instances in the specified project.
- All: Select all instances.
{"targets":{"Type":"Tags","Tags":[{"Key":"tagKey1","Value":"tagValue1"}]}}
{"targets":{"Type":"Project","Project":"projectName"}}
{"targets":{"Type":"All"}}
Execute functions
VOS::InvokeInnerFunction example
The following compute functions are currently preconfigured:
- FN::Equals
- FN::Now
- FN::AddMinute
- FN::FormatUTCTime
- FN::ExecuteJQExpression
- FN::GetExecutionId
{
"Tasks": [
{
"Name": "getSplitInstanceIdList",
"Description": "Get the list of instance IDs after segmentation",
"Action": "VOS::InvokeInnerFunction",
"Parameters": {
"FunctionName": "FN::ExecuteJQExpression",
"Input": " def split($array; $len):\n if $array | length > $len then $array | .[0:$len] as $temp | [$temp] + split(.[$len:]; $len) else [$array] end; split(.InstanceIds; 100) "
},
"Outputs": {
"instanceIdList": {
"Type": "List",
"Value": "{{ . }}"
}
}
}
]
}
Nesting
VOS::InvokeTemplate example
"Tasks": [
{
"Name": "BulkyModifyInstanceVpcAttribute",
"Action": "VOS::InvokeTemplate",
"Description": "{\"zh-cn\":\"Batch modify instance VPC information\",\"en\":\"BulkyModifyInstanceVpcAttribute\"}",
"Parameters": {
"TemplateId": "tl-ydsu3hnja4kkk1k****",
"VPCInfo": "{{ VOS::LoopItem }}",
"NeedStart": "{{ .NeedStart }}"
},
"Outputs": {
"NetworkInterfaceId": {
"Type": "String",
"Value": "{{ .NetworkInterfaceId }}"
}
},
"Loop": {
"LoopItem": "{{ .AllVPCInfo }}",
"Outputs": {
"NetworkInterfaceIds": {
"SelectedOutputFiled": "NetworkInterfaceId"
}
},
"RateControl": "{{ .RateControl }}"
}
}
]
Last updated: 2026.06.18 17:48:27
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