The alert service provides the monitoring alert capability, allowing you to obtain up-to-date metric data for troubleshooting any cloud product abnormality in a timely manner.
Parameter description
Product: Host monitoring, RDS, OSS, and so on.
Resource range: Indicates the range in which an alert policy takes effect. Three range types are provided: All resources, Group, and Instance.
All resources: The alert policy takes effect for all instances of a product under a username. For example, if you set an alert policy for MongoDB CPU usage greater than 80% and select all resources range, the alert is triggered when the CPU usage of a MongoDB instance under your username is greater than 80%.
Group: The alert policy takes effect for all instances in a group. For example, if you set an alert policy for host CPU usage greater than 80% and select the group range, the alert is triggered when the CPU usage of a host in the specified group is greater than 80%.
Instance: The alert policy takes effect only for a specific instance. For example, if you set an alert policy for host CPU usage greater than 80% and select the instance range, the alert is triggered when the CPU usage of the specified instance is greater than 80%.
Policy Name: Name of an alert policy.
Policy Description: Subject of an alert policy, which describes the conditions that metric data must meet to trigger the alert.
For example, if you configure policy description as “1-minute average CPU usage >=90%”, the alert service checks every minute whether the average value of metric data collected during 1 minute is greater than or equal to 90%.
In host monitoring, a single server metric reports one data point every 15 seconds, so 20 data points are reported in 5 minutes.
“5-minute average CPU usage > 90%” indicates that the average value of the 20 data points about CPU usage in 5 minutes is greater than 90%.
“5-minute CPU usage always > 90%” indicates that the values of the 20 data points about CPU usage in 5 minutes are all greater than 90%.
“5-minute CPU usage once > 90%” indicates that the value of at least one of the 20 data points about CPU usage in 5 minutes is greater than 90%.
“Total 5-minute Internet outbound traffic > 50 MB” indicates that the sum of the values of the 20 data points about Internet outbound traffic in 5 minutes is greater than 5 MB.
Alert after the threshold value is exceeded multiple times consecutively: An alert notification is sent in the case that the value has been detected multiple times to meet the alert policy.
Effective Time: Time when an alert policy takes effect. The alert service checks metric data and determines whether to generate an alert only when the alert policy is effective.
Notification Object: A group of contacts who receive alert notifications.
Notification Method: Method by which alert notifications are sent. Two methods are available: E-mail+TradeManager and mobile phone+E-mail+TradeManager.
Email Remarks: Supplementary information customized for an alert email. The remarks are sent together with the alert notification email.
Alert policy management
CloudMonitor provides three alert policy management portals: Group page, monitoring list page for various metrics, and Alert Policy List page of the alert service.
Manage alarm rules in Group monitoring.
Manage alarm rules in Host monitoring.
Manage alarm rules in Cloud Service monitoring.
Use alarm rules in Site monitoring.