将 PutScalingPolicy 与 CLI 配合使用

向自动扩缩组添加目标跟踪扩缩策略

以下 put-scaling-policy 示例将目标跟踪扩展策略应用到指定的自动扩缩组。输出包含代表您创建的两个 CloudWatch 警报的 ARN 和名称。如果已存在同名扩缩策略，则该扩展策略将被新扩展策略覆盖。

aws autoscaling put-scaling-policy --auto-scaling-group-name my-asg \
  --policy-name alb1000-target-tracking-scaling-policy \
  --policy-type TargetTrackingScaling \
  --target-tracking-configuration file://config.json

的内容config.json：

{
     "TargetValue": 1000.0,
     "PredefinedMetricSpecification": {
          "PredefinedMetricType": "ALBRequestCountPerTarget",
          "ResourceLabel": "app/my-alb/778d41231b141a0f/targetgroup/my-alb-target-group/943f017f100becff"
     }
}

输出：

{
     "PolicyARN": "arn:aws:autoscaling:region:account-id:scalingPolicy:228f02c2-c665-4bfd-aaac-8b04080bea3c:autoScalingGroupName/my-asg:policyName/alb1000-target-tracking-scaling-policy",
     "Alarms": [
         {
             "AlarmARN": "arn:aws:cloudwatch:region:account-id:alarm:TargetTracking-my-asg-AlarmHigh-fc0e4183-23ac-497e-9992-691c9980c38e",
             "AlarmName": "TargetTracking-my-asg-AlarmHigh-fc0e4183-23ac-497e-9992-691c9980c38e"
         },
         {
             "AlarmARN": "arn:aws:cloudwatch:region:account-id:alarm:TargetTracking-my-asg-AlarmLow-61a39305-ed0c-47af-bd9e-471a352ee1a2",
             "AlarmName": "TargetTracking-my-asg-AlarmLow-61a39305-ed0c-47af-bd9e-471a352ee1a2"
         }
     ]
 }

有关更多示例，请参阅《Amazon EC2 Auto Scaling 用户指南》中的 AWS 命令行界面（AWS CLI）的扩展策略示例。

示例 1：此示例将指定的策略添加到指定的自动扩缩组。指定的调整类型可确定如何解读 ScalingAdjustment 参数。使用“ChangeInCapacity”，正值将按指定的实例数量增加容量，负值将按指定的实例数量减少容量。

Write-ASScalingPolicy -AutoScalingGroupName my-asg -AdjustmentType "ChangeInCapacity" -PolicyName "myScaleInPolicy" -ScalingAdjustment -1

输出：

arn:aws:autoscaling:us-west-2:123456789012:scalingPolicy:aa3836ab-5462-42c7-adab-e1d769fc24ef:autoScalingGroupName/my-asg
:policyName/myScaleInPolicy

示例 1：此示例将指定的策略添加到指定的自动扩缩组。指定的调整类型可确定如何解读 ScalingAdjustment 参数。使用“ChangeInCapacity”，正值将按指定的实例数量增加容量，负值将按指定的实例数量减少容量。

Write-ASScalingPolicy -AutoScalingGroupName my-asg -AdjustmentType "ChangeInCapacity" -PolicyName "myScaleInPolicy" -ScalingAdjustment -1

输出：

arn:aws:autoscaling:us-west-2:123456789012:scalingPolicy:aa3836ab-5462-42c7-adab-e1d769fc24ef:autoScalingGroupName/my-asg
:policyName/myScaleInPolicy