You can call this operation to query one or more event-triggered tasks.

Debugging

OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request parameters

Parameter Type Required Example Description
Action String Yes DescribeAlarms

The operation that you want to perform. Set the value to DescribeAlarms.
RegionId String Yes cn-qingdao

The region ID of the event-triggered task.
ScalingGroupId String No asg-bp18p2yfxow2dloq****

The ID of the scaling group to be monitored by the event-triggered task.
AlarmTaskId String No asg-bp1hvbnmkl10vll5****_f95ce797-dc2e-4bad-9618-14fee7d1****

The ID of the event-triggered task.
State String No OK

The status of the event-triggered task. Valid values:

  • ALARM: One or more alerts are triggered because the specified alert condition is met.
  • OK: No alert is triggered because the specified alert condition is not met.
  • INSUFFICIENT_DATA: Auto Scaling cannot determine whether the specified alert condition is met because data is insufficient.
IsEnable Boolean No true

Specifies whether the event-triggered task is enabled. Valid values:

  • true: The event-triggered task is enabled.
  • false: The event-triggered task is disabled.
MetricType String No system

The type of the monitoring metric. Valid values:

  • system: the built-in metric of Cloud Monitor
  • custom: the custom metric that is used to report relevant data of ECS instances to Cloud Monitor
MetricName String No CpuUtilization

The name of the event-triggered task.
PageSize Integer No 10

The number of entries to return on each page. Maximum value: 50.

Default value: 10.
PageNumber Integer No 1

The number of the page to return. Pages start from page 1.

Default value : 1.

Response parameters

Parameter Type Example Description
AlarmList Array of Alarm

The list of event-triggered tasks.
Alarm
AlarmActions List ari:acs:ess:cn-hangzhou:1406926474****:scalingrule/asr-bp163l21e07uh****

The list of unique identifiers of the scaling rules that are associated with the event-triggered tasks.

AlarmTaskId String asg-bp1hvbnmkl10vll5****_f95ce797-dc2e-4bad-9618-14fee7d1****

The ID of the event-triggered task.
ComparisonOperator String >=

The operator for comparison between the collected metric value and the threshold. This parameter is used to specify the relationship between the metric value and the threshold that meets the alert condition. Valid values:

  • >=: The metric value is greater than or equal to the threshold.
  • <=: The metric value is less than or equal to the threshold.
  • >: The metric value is greater than the threshold.
  • <: The metric value is less than the threshold.
Description String Test alarm task.

The description of the event-triggered task.
Dimensions Array of Dimension

The dimensions that are associated with the metric.
Dimension
DimensionKey String device

The key of the dimension that is associated with the metric. Valid values:

  • user_id: the ID of your account
  • scaling_group: the scaling group to be monitored
  • device: the type of the NIC
  • state: the status of TCP connections
DimensionValue String eth0

The value of the dimension that is associated with the metric. The value of this parameter depends on the DimensionKey parameter.

user_id: automatically filled by the system.

scaling_group: automatically filled by the system.

Valid values of device:

  • eth0: the internal network NIC for classic network-type ECS instances, and the only NIC for VPC-type ECS instances.
  • eth1: the Internet NIC for classic network-type ECS instances.

Valid values of state:

  • TCP_TOTAL: the total number of TCP connections
  • ESTABLISHED: the number of TCP connections that have been established
Effective String Test
Note This parameter is in invitational preview and not available.
Enable Boolean true

Indicates whether the event-triggered task is enabled. Valid values:

  • true: The event-triggered task is enabled.
  • false: The event-triggered task is disabled.
EvaluationCount Integer 3

The number of times that the alert condition must be met to trigger an alert and execute scaling rules. For example, if this parameter is set to 3, an alert is triggered when the average CPU utilization is greater than or equal to 80% for three times.

MetricName String CpuUtilization

The name of the monitroing metric. Valid values:

  • CpuUtilization: the CPU utilization in percentage.
  • ClassicInternetRx: the inbound traffic over the Internet to the classic network. Unit: KB/min.
  • ClassicInternetTx: the outbound traffic over the Internet from the classic network. Unit: KB/min.
  • VpcInternetRx: the inbound traffic over the Internet to the VPC. Unit: KB/min.
  • VpcInternetTx: the outbound traffic over the Internet from the VPC. Unit: KB/min.
  • IntranetRx: the inbound traffic over the internal network. Unit: KB/min.
  • IntranetTx: the outbound traffic over the internal network. Unit: KB/min.
  • LoadAverage: the average system load.
  • MemoryUtilization: the memory usage in percentage.
  • SystemDiskReadBps: the number of bytes read from the system disk per second.
  • SystemDiskWriteBps: the number of bytes written to the system disk per second.
  • SystemDiskReadOps: the number of times that the system disk is read per second.
  • SystemDiskWriteOps: the number of times that the system disk is written per second.
  • PackagesNetIn: the number of packets that are received by the NIC per second.
  • PackagesNetOut: the number of packets that are sent by the NIC per second.
  • TcpConnection: the number of TCP connections.

For more information, see the Description section of this topic.
MetricType String system

The type of the monitoring metric. Valid values:

  • system: the built-in metric of Cloud Monitor
  • custom: the custom metric that is used to report relevant data of ECS instances to Cloud Monitor
Name String TestAlarmTask

The name of the event-triggered task.
Period Integer 300

The period for collecting the statistical value of the metric. Unit: seconds. Valid values:

  • 60
  • 120
  • 300
  • 900
ScalingGroupId String asg-bp18p2yfxow2dloq****

The ID of the scaling group that is monitored by the event-triggered task.
State String ALARM

The status of the event-triggered task. Valid values:

  • ALARM: One or more alerts are triggered because the specified alert condition is met.
  • OK: No alert is triggered because the specified alert condition is not met.
  • INSUFFICIENT_DATA: Auto Scaling cannot determine whether the specified alert condition is met because data is insufficient.
Statistics String Average

The type of the statistical value that is collected for the metric. Valid values:

  • Average: the average value
  • Minimum: the minimum value
  • Maximum: the maximum value
Threshold Float 80

The threshold of the metric. The alert condition of the event-triggered task specifies the relationship between the statistical value and the threshold of the metric. When the alert condition is met for the specified number of times, Auto Scaling triggers an alert and executes the scaling rules specified in the event-triggered task.

PageNumber Integer 1

The number of the returned page.
PageSize Integer 10

The number of entries per page.
RequestId String 871C7C53-34A4-45AA-8C14-4B72FA6A****

The ID of the request.
TotalCount Integer 2

The total number of event-triggered tasks.

Examples

Sample requests

https://ess.aliyuncs.com/?Action=DescribeAlarms
&RegionId=cn-qingdao
&<Common request parameters>

Sample success responses

XML format 

<DescribeAlarmsResponse>
  <PageNumber>1</PageNumber>
  <TotalCount>2</TotalCount>
  <PageSize>10</PageSize>
  <AlarmList>
    <Alarm>
      <Period>300</Period>
      <Statistics>Average</Statistics>
      <MetricType>system</MetricType>
      <EvaluationCount>3</EvaluationCount>
      <Name>asg-bp1hvbnmkl10vll5xtt2_f95ce797-dc2e-4bad-9618-14fee7d1****</Name>
      <AlarmTaskId>asg-bp1hvbnmkl10vll5xtt2_f95ce797-dc2e-4bad-9618-14fee7d1****</AlarmTaskId>
      <MetricName>MemoryUtilization</MetricName>
      <Threshold>55</Threshold>
      <State>INSUFFICIENT_DATA</State>
      <Enable>false</Enable>
      <ScalingGroupId>asg-bp1hvbnmkl10vll5****</ScalingGroupId>
      <Dimensions>
        <Dimension>
          <DimensionValue>asg-bp1hvbnmkl10vll5****</DimensionValue>
          <DimensionKey>scaling_group</DimensionKey>
        </Dimension>
        <Dimension>
          <DimensionValue>140692647406****</DimensionValue>
          <DimensionKey>userId</DimensionKey>
        </Dimension>
      </Dimensions>
      <ComparisonOperator>>=</ComparisonOperator>
    </Alarm>
    <Alarm>
      <Period>60</Period>
      <Description>DO NOT EDIT OR DELETE.For TargetTrackingScalingRule scalingRuleAri:ari:acs:ess:cn-hangzhou:140692647406****:scalingrule/asr-bp13jvr9iummzvgk****, scalingRuleName:****-target-tracking-scaling-rule</Description>
      <Statistics>Average</Statistics>
      <MetricType>system</MetricType>
      <EvaluationCount>15</EvaluationCount>
      <AlarmActions>
        <AlarmAction>ari:acs:ess:cn-hangzhou:140692647406****:scalingrule/asr-bp13jvr9iummzvgk****</AlarmAction>
      </AlarmActions>
      <Name>TargetTracking-asr-bp13jvr9iummzvgk****-AlarmLow-3f4730b9-c275-4527-b057-847fa883****</Name>
      <AlarmTaskId>asg-bp18p2yfxow2dloq****_48efb36a-c0b8-4173-b699-bd37c430****</AlarmTaskId>
      <MetricName>CpuUtilization</MetricName>
      <Threshold>56</Threshold>
      <State>ALARM</State>
      <Enable>true</Enable>
      <ScalingGroupId>asg-bp18p2yfxow2dloq****</ScalingGroupId>
      <Dimensions>
        <Dimension>
          <DimensionValue>asg-bp18p2yfxow2dloq****</DimensionValue>
          <DimensionKey>scaling_group</DimensionKey>
        </Dimension>
        <Dimension>
          <DimensionValue>140692647406****</DimensionValue>
          <DimensionKey>userId</DimensionKey>
        </Dimension>
      </Dimensions>
      <ComparisonOperator><</ComparisonOperator>
    </Alarm>
  </AlarmList>
  <RequestId>871C7C53-34A4-45AA-8C14-4B72FA6A****</RequestId>
</DescribeAlarmsResponse>

JSON format 

{
	"PageNumber": 1,
	"TotalCount": 2,
	"PageSize": 10,
	"AlarmList": {
		"Alarm": [
			{
				"Period": 300,
				"Statistics": "Average",
				"MetricType": "system",
				"EvaluationCount": 3,
				"Name": "asg-bp1hvbnmkl10vll5xtt2_f95ce797-dc2e-4bad-9618-14fee7d1****",
				"AlarmTaskId": "asg-bp1hvbnmkl10vll5xtt2_f95ce797-dc2e-4bad-9618-14fee7d1****",
				"MetricName": "MemoryUtilization",
				"Threshold": 55,
				"State": "INSUFFICIENT_DATA",
				"Enable": false,
				"ScalingGroupId": "asg-bp1hvbnmkl10vll5****",
				"Dimensions": {
					"Dimension": [
						{
							"DimensionValue": "asg-bp1hvbnmkl10vll5****",
							"DimensionKey": "scaling_group"
						},
						{
							"DimensionValue": "140692647406****",
							"DimensionKey": "userId"
						}
					]
				},
				"ComparisonOperator": ">="
			},
			{
				"Period": 60,
				"Description": "DO NOT EDIT OR DELETE.For TargetTrackingScalingRule scalingRuleAri:ari:acs:ess:cn-hangzhou:140692647406****:scalingrule/asr-bp13jvr9iummzvgk****, scalingRuleName:****-target-tracking-scaling-rule",
				"Statistics": "Average",
				"MetricType": "system",
				"EvaluationCount": 15,
				"AlarmActions": {
					"AlarmAction": [
						"ari:acs:ess:cn-hangzhou:140692647406****:scalingrule/asr-bp13jvr9iummzvgk****"
					]
				},
				"Name": "TargetTracking-asr-bp13jvr9iummzvgk****-AlarmLow-3f4730b9-c275-4527-b057-847fa883****",
				"AlarmTaskId": "asg-bp18p2yfxow2dloq****_48efb36a-c0b8-4173-b699-bd37c430****",
				"MetricName": "CpuUtilization",
				"Threshold": 56,
				"State": "ALARM",
				"Enable": true,
				"ScalingGroupId": "asg-bp18p2yfxow2dloq****",
				"Dimensions": {
					"Dimension": [
						{
							"DimensionValue": "asg-bp18p2yfxow2dloq****",
							"DimensionKey": "scaling_group"
						},
						{
							"DimensionValue": "140692647406****",
							"DimensionKey": "userId"
						}
					]
				},
				"ComparisonOperator": "<"
			}
		]
	},
	"RequestId": "871C7C53-34A4-45AA-8C14-4B72FA6A****"
}

Error codes

For a list of error codes, visit the API Error Center.