Creating an Alarm Rule

Function

This API is used to create an alarm rule.

URI

POST /V1.0/{project_id}/alarms

Parameter description

**Table 1** Parameter description
Parameter	Mandatory	Description
project_id	Yes	Specifies the project ID. For details about how to obtain the project ID, see Obtaining a Project ID.

Example

POST https://{Cloud Eye endpoint}/V1.0/{project_id}/alarms

Request

Request parameters

**Table 2** Request parameters
Parameter	Mandatory	Type	Description
alarm_name	Yes	String	Specifies the alarm rule name. Enter 1 to 128 characters. Only letters, digits, underscores (_), and hyphens (-) are allowed.
alarm_description	No	String	Provides supplementary information about the alarm rule. Enter 0 to 256 characters.
metric	Yes	Object	Specifies the alarm metric. For details, see Table 3.
condition	Yes	Object	Specifies the alarm triggering condition. For details, see Table 7.
alarm_enabled	No	Boolean	Specifies whether to enable the alarm. The default value is true.
alarm_action_enabled	No	Boolean	Specifies whether to enable the action to be triggered by an alarm. The default value is true. NOTE: If you set alarm_action_enabled to true, you must specify either alarm_actions or ok_actions. (You do not need to configure the deprecated parameter insufficientdata_actions.) If alarm_actions and ok_actions coexist, their notificationList must be the same. (You do not need to configure the deprecated parameter insufficientdata_actions.)
alarm_level	No	Integer	Specifies the alarm severity, which can be 1, 2 (default), 3 or 4, indicating critical, major, minor, and informational, respectively.
alarm_type	No	String	Specifies the alarm rule type. EVENT.SYS: The alarm rule is created for system events. EVENT.CUSTOM: The alarm rule is created for custom events.
alarm_actions	No	Array of objects	Specifies the action to be triggered by an alarm. An example structure is as follows: { "type": "notification","notificationList": ["urn:smn:region:68438a86d98e427e907e0097b7e35d47:sd"] } For details, see Table 5.
ok_actions	No	Array of objects	Specifies the action to be triggered after the alarm is cleared. Its structure is: { "type": "notification","notificationList": ["urn:smn:region:68438a86d98e427e907e0097b7e35d47:sd"] } For details, see Table 6.

**Table 3** **metric** data structure description
Parameter	Mandatory	Type	Description
namespace	Yes	String	Specifies the namespace of a service. For example, see Namespace for the ECS namespace. The namespace must be in the service.item format and contain 3 to 32 characters. service and item each must start with a letter and contain only letters, digits, and underscores (_).
dimensions	No	Array of objects	Specifies the metric dimension list. When resource_group_id is not used, dimensions is mandatory. For details, see Table 4.
metric_name	Yes	String	Specifies the metric name. Start with a letter. Enter 1 to 64 characters. Only letters, digits, and underscores (_) are allowed. For details, see the metric name queried in Querying Metrics.
resource_group_id	No	String	Specifies the resource group ID selected during the alarm rule creation, for example, rg1603786526428bWbVmk4rP. NOTE: If you create alarm rules for resource groups, you must specify resource_group_id and name, enter at least one dimension for dimensions, and set alarm_type to RESOURCE_GROUP.

**Table 4** **dimensions** data structure description
Parameter	Mandatory	Type	Description
name	Yes	String	Specifies the dimension. For example, the ECS dimension is instance_id, which is listed in the key column in Dimension. Start with a letter. Enter 1 to 32 characters. Only letters, digits, underscores (_), and hyphens (-) are allowed.
value	Yes	String	Specifies the dimension value, for example, an ECS ID. Start with a letter or a digit. Enter 1 to 256 characters. Only letters, digits, underscores (_), and hyphens (-) are allowed.

**Table 5** **alarm_actions** data structure description
Parameter	Mandatory	Type	Description
type	Yes	String	Specifies the alarm notification type. notification: indicates that a notification will be sent. autoscaling: indicates that a scaling action will be triggered.
notificationList	Yes	Array of strings	Specifies the list of objects to be notified if the alarm status changes. You can add up to 5 object IDs. You can obtain the topicUrn value from SMN in the following format: urn:smn:([a-z]\|[A-Z]\|[0-9]\|\-){1,32}:([a-z]\|[A-Z]\|[0-9]){32}:([a-z]\|[A-Z]\|[0-9]\|\-\|\_){1,256}. If you set type to notification, you must specify notificationList. If you set type to autoscaling, you must set notificationList to []. NOTE: To make the AS alarm rules take effect, you must bind scaling policies. For details, see the Auto Scaling API Reference. If you set alarm_action_enabled to true, you must specify either alarm_actions or ok_actions. (You do not need to configure the deprecated parameter insufficientdata_actions.) If alarm_actions and ok_actions coexist, their notificationList must be the same. (You do not need to configure the deprecated parameter insufficientdata_actions.) The IDs in the list are strings.

**Table 6** **ok_actions** data structure description
Parameter	Mandatory	Type	Description
type	Yes	String	Specifies the notification type when an alarm is triggered. notification: indicates that a notification will be sent. autoscaling: indicates that a scaling action will be triggered.
notificationList	Yes	Array of objects	Specifies the list of objects to be notified if the alarm status changes. You can add up to 5 object IDs. You can obtain the topicUrn value from SMN in the following format: urn:smn:([a-z]\|[A-Z]\|[0-9]\|\-){1,32}:([a-z]\|[A-Z]\|[0-9]){32}:([a-z]\|[A-Z]\|[0-9]\|\-\|\_){1,256}. NOTE: If you set alarm_action_enabled to true, you must specify either alarm_actions or ok_actions. (You do not need to configure the deprecated parameter insufficientdata_actions.) If alarm_actions and ok_actions coexist, their notificationList must be the same. (You do not need to configure the deprecated parameter insufficientdata_actions.)

**Table 7** **condition** data structure description
Parameter	Mandatory	Type	Description
period	Yes	Integer	Specifies the period during which Cloud Eye determines whether to trigger an alarm. Unit: second Possible periods are 1, 300, 1200, 3600, 14400, and 86400. NOTE: If you set period to 1, Cloud Eye uses raw data to determine whether to trigger an alarm.
filter	Yes	String	Specifies the data rollup method. Possible methods are max, min, average, sum, or variance.
comparison_operator	Yes	String	Specifies the alarm threshold operator. Possible operators are >, =, <, >=, and <=.
value	Yes	Double	Specifies the alarm threshold. Supported range: 0 to Number. MAX_VALUE (1.7976931348623157e+108) For detailed thresholds, see the value range of each metric in the appendix. For example, you can set ECS cpu_util in Metrics to 80.
unit	No	String	Specifies the data unit. Enter up to 32 characters.
count	Yes	Integer	Specifies the number of consecutive occurrence times that the alarm policy was met. Supported range: 1 to 5

Example request 1

Creating an alarm rule to monitor a metric

{
    "alarm_name": "alarm-rp0E", 
    "alarm_description": "", 
    "metric": {
        "namespace": "SYS.ECS", 
        "dimensions": [
            {
                "name": "instance_id", 
                "value": "33328f02-3814-422e-b688-bfdba93d4051"
            }
        ], 
        "metric_name": "network_outgoing_bytes_rate_inband"
    }, 
    "condition": {
        "period": 300, 
        "filter": "average", 
        "comparison_operator": ">=", 
        "value": 6, 
        "unit": "Byte/s", 
        "count": 1        
   }, 
    "alarm_enabled": true, 
    "alarm_action_enabled": true, 
    "alarm_level": 2,
    "alarm_actions": [
        {
            "type": "notification", 
            "notificationList": ["urn:smn:region:68438a86d98e427e907e0097b7e35d48:sd"]
        }
    ], 
    "ok_actions": [
        {
            "type": "notification", 
            "notificationList": ["urn:smn:region:68438a86d98e427e907e0097b7e35d48:sd"]
        }
    ]
}

Example request 2

Creating an alarm rule to monitor an event

{
 "alarm_name": "alarm-test",
 "metric": {
  "namespace": "SYS.ECS",
  "metric_name": "instance_resize_scheduled",
  "dimensions": [
   {
    "name": "instance_id",
    "value": "d53692e5-828b-495b-a5e2-a1b227f6034c"
   }
  ]
 },
 "condition": {
  "comparison_operator": ">=",
  "count": 1,
  "filter": "average",
  "period": 0,
  "unit": "count",
  "value": 1
 },
 "alarm_enabled": true,
 "alarm_action_enabled": true,
 "alarm_level": 2,
 "alarm_type": "EVENT.SYS",
 "alarm_actions": [
  {
   "type": "notification",
   "notificationList": ["urn:smn:region:ce8476c174f94c6991ea7885e3380d99:sd"]
  }
 ],
 "ok_actions": [
  {
   "type": "notification",
   "notificationList": ["urn:smn:region:ce8476c174f94c6991ea7885e3380d99:sd"]
  }
 ]
}

Response

Response parameters

**Table 8** Response parameters
Parameter	Type	Description
alarm_id	String	Specifies the alarm rule ID.

Example response

{ 
    "alarm_id":"al1450321795427dR8p5mQBo"
}

Returned Values

Normal
201

Abnormal

Returned Value	Description
400 Bad Request	Request error.
401 Unauthorized	The authentication information is not provided or is incorrect.
403 Forbidden	Access to the requested page is forbidden.
408 Request Timeout	The request timed out.
429 Too Many Requests	Concurrent requests are excessive.
500 Internal Server Error	Failed to complete the request because of an internal service error.
503 Service Unavailable	The service is currently unavailable.