Auto Scaling:CreateAlarm

The region ID of the scaling group.

The name of the event-triggered task.

The description of the event-triggered task.

The scaling group ID of the event-triggered task.

The metric name. The valid values of this parameter vary based on the metric type.

• If you set MetricType to custom, the valid values are the metrics that you have.

• If you set MetricType to system, this parameter has the following valid values:

  • CpuUtilization: the CPU utilization. Unit: %.
  • ConcurrentConnections: the number of concurrent connections.
  • IntranetTx: the outbound traffic over an internal network. Unit: KB/min.
  • IntranetRx: the inbound traffic over an internal network. Unit: KB/min.
  • VpcInternetTx: the outbound traffic over a virtual private cloud (VPC). Unit: KB/min.
  • VpcInternetRx: the inbound traffic over a VPC. Unit: KB/min.
  • 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 read IOPS of the system disk. Unit: counts/s.
  • SystemDiskWriteOps: the write IOPS of the system disk. Unit: counts/s.
  • CpuUtilizationAgent: the CPU utilization. Unit: %.
  • GpuUtilizationAgent: the GPU utilization. Unit: %.
  • GpuMemoryFreeUtilizationAgent: the idle GPU memory usage. Unit: %.
  • GpuMemoryUtilizationAgent: the GPU memory usage. Unit: %.
  • MemoryUtilization: the memory usage. Unit: %.
  • LoadAverage: the average system load.
  • TcpConnection: the total number of TCP connections.
  • TcpConnection: the number of established TCP connections.
  • PackagesNetOut: the number of packets sent by the internal network interface controller (NIC). Unit: counts/s.
  • PackagesNetIn: the number of packets received by the internal NIC. Unit: counts/s.
  • PackagesNetOut: the number of packets sent by the public NIC. Unit: counts/s.
  • PackagesNetIn: the number of packets received by the public NIC. Unit: counts/s.
  • EciPodCpuUtilization: the CPU utilization. Unit: %.
  • EciPodMemoryUtilization: the memory usage. Unit: %.
  • LoadBalancerRealServerAverageQps: the queries per second (QPS) of an instance.

For more information, see Event-triggered tasks of the system monitoring type.

The type of the metric. Valid values:

• system: system metrics of CloudMonitor
• custom: custom metrics that are reported to CloudMonitor

The statistical period of the metric data. Unit: seconds. Valid values:

• 15
• 60
• 120
• 300
• 900

Default value: 300.

The method that is used to aggregate statistics for the metric. Valid values:

• Average
• Minimum
• Maximum

Default value: Average.

The threshold of the metric value. If the threshold is reached the specified number of times within the specified period, a scaling rule is executed.

The operator that is used to compare the metric value and the threshold. Valid values:

• If the metric value is greater than or equal to the threshold, set the value to: >=.
• If the metric value is less than or equal to the threshold, set the value to: <=.
• If the metric value is greater than the threshold, set the value to: >.
• If the metric value is less than the threshold, set the value to: <.

Default value: >=.

The number of times that the threshold must be reached before a scaling rule can be executed. For example, if you set this parameter to 3, the average CPU utilization must reach or exceed 80% three times in a row before a scaling rule is triggered.

Default value: 3.

The ID of the application group to which the custom metric belongs. If you set the MetricType parameter to custom, you must specify this parameter.

The effective period of the event-triggered task. By default, the event-triggered task is in effect all the time.

This parameter follows the cron expression format. The default format is X X X X X ?. In the format:

• X: a placeholder for a field, which represents seconds, minutes, hours, days, and months in sequence. X can be a definite value or a special character that has logical meaning. For information about the valid values of X, see Cron expression.
• ?: No value is specified.

Sample values:

• * * * * * ? : The event-triggered task is in effect all the time.
• * * 17-18 * * ? : The event-triggered task is in effect between 17:00 and 18:59 (UTC+8) every day.
• TZ=+00 * * 1-2 * * ?: The event-triggered task is in effect between 01:00 and 02:59 (UTC+0) every day.

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

The metric dimensions.

The information about the multi-metric alert rules.

The relationship between the trigger conditions in the multi-metric alert rule. Valid values:

• &&: An alert is triggered only if all metrics in the multi-metric alert rule meet the trigger conditions. In this case, an alert is triggered only if the results of all trigger conditions that are specified in the multi-metric alert rule are true.
• ||: An alert is triggered if one of the metrics in the multi-metric alert rule meets the trigger conditions.

Default value: &&.