Querying Monitoring Data of a Metric

Function

This API is used to query the monitoring data of a specified metric at a specified granularity in a specified time range. You can specify the dimension of data to be queried.

URI

GET /V1.0/{project_id}/metric-data?namespace={namespace}&metric_name={metric_name}&dim.{i}=key,value&from={from}&to={to}&period={period}&filter={filter}

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.

**Table 2** Query parameter 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 (_).
metric_name	Yes	String	Specifies the metric name. You can obtain the metric names of existing alarm rules by referring to Querying Metrics.
from	Yes	String	Specifies the start time of the query. The time is a UNIX timestamp and the unit is ms. Rollup aggregates the raw data generated within a period to the start time of the period. If from and to are within a period, the query result will be empty due to the rollup failure. Set from to at least one period earlier than the current time. Take the 5-minute period as an example. If it is 10:35 now, the raw data generated between 10:30 and 10:35 will be aggregated to 10:30. In this example, if period is 5 minutes, from should be 10:30. NOTE: Cloud Eye rounds up from based on the level of granularity required to perform the rollup.
to	Yes	String	Specifies the end time of the query. The time is a UNIX timestamp and the unit is ms. from must be earlier than to.
period	Yes	Integer	Specifies how often Cloud Eye aggregates data, which can be 1: Cloud Eye displays raw data. 300: Cloud Eye aggregates data every 5 minutes. 1200: Cloud Eye aggregates data every 20 minutes. 3600: Cloud Eye aggregates data every 1 hour. 14400: Cloud Eye aggregates data every 4 hours. 86400: Cloud Eye aggregates data every 24 hours.
filter	Yes	String	Specifies the data rollup method, which can be average: Cloud Eye calculates the average value of metric data within a rollup period. max: Cloud Eye calculates the maximum value of metric data within a rollup period. min: Cloud Eye calculates the minimum value of metric data within a rollup period. sum: Cloud Eye calculates the sum of metric data within a rollup period. variance: Cloud Eye calculates the variance value of metric data within a rollup period. NOTE: Rollup uses a rollup method to aggregate raw data generated within a specific period. Take the 5-minute period as an example. If it is 10:35 now, the raw data generated between 10:30 and 10:35 will be aggregated to 10:30.
dim	Yes	String	A maximum of three metric dimensions are supported, and the dimensions are numbered from zero in the dim.{i}=key,value format. key cannot exceed 32 characters and value cannot exceed 256 characters. The following dimensions are only examples. For details about dimensions of each service, see the description of each service, for example, instance_id of ECS in Dimension. Single dimension: dim.0=instance_id,i-12345 Multiple dimensions: dim.0=instance_id,i-12345&dim.1=instance_name,i-1234

dimensions can be obtained from the response body by calling the API for Querying Metrics.
OBS metric data can be queried only when the related OBS APIs are called.

Example:

Request example 1: View the CPU usage of ECS whose ID is 6f3c6f91-4b24-4e1b-b7d1-a94ac1cb011d from 2019-04-30 20:00:00 to 2019-04-30 22:00:00. The monitoring interval is 20 minutes.

GET https://{Cloud Eye endpoint}/V1.0/{project_id}/metric-data?namespace=SYS.ECS&metric_name=cpu_util&dim.0=instance_id,6f3c6f91-4b24-4e1b-b7d1-a94ac1cb011d&from=1556625600000&to=1556632800000&period=1200&filter=min

Request

None

Response

Response parameters

**Table 3** Response parameters
Parameter	Type	Description
datapoints	Array of objects	Specifies the metric data list. For details, see Table 4. Since Cloud Eye rounds up from based on the level of granularity for data query, datapoints may contain more data points than expected.
metric_name	String	Specifies the metric ID. For example, if the monitoring metric of an ECS is CPU usage, metric_name is cpu_util.

**Table 4** **datapoints** data structure description
Parameter	Type	Description
average	Double	Specifies the average value of metric data within a rollup period.
max	Double	Specifies the maximum value of metric data within a rollup period.
min	Double	Specifies the minimum value of metric data within a rollup period.
sum	Double	Specifies the sum of metric data within a rollup period.
variance	Double	Specifies the variance of metric data within a rollup period.
timestamp	Long	Specifies when the metric is collected. It is a UNIX timestamp in milliseconds.
unit	String	Specifies the metric unit.

Example response

Example response 1: The dimension is SYS.ECS, and the average CPU usage of ECSs is displayed.

{
    "datapoints": [
        {
            "average": 0.23, 
            "timestamp": 1442341200000, 
            "unit": "%"
        }
    ], 
    "metric_name": "cpu_util"
}

Example response 2: The dimension is SYS.ECS, and the sum CPU usage of ECSs is displayed.

{
    "datapoints": [
        {
            "sum": 0.53, 
            "timestamp": 1442341200000, 
            "unit": "%"
        }
    ], 
    "metric_name": "cpu_util"
}

Example response 3: The dimension is SYS.ECS, and the maximum CPU usage of ECSs is displayed.

{
    "datapoints": [
        {
            "max": 0.13, 
            "timestamp": 1442341200000, 
            "unit": "%"
        }
    ], 
    "metric_name": "cpu_util"
}

Returned Values

Normal
200

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.