Cloudwatch要启用ASG监控采集图表指标截图里选哪一个StatisticPeriod01-ALB-TG-RequestRequestCountApplicationELB Per AppELB MetricsSum1 minuteRequestCountPerTargetApplicationELB Per AppELB, per TG MetricsSum1 minute02-ALB-TG-5XXHTTPCode_ELB_5XX_CountApplicationELB Per AppELB MetricsSum1 minuteHTTPCode_Target_5XX_CountApplicationELB Per AppELB, per TG MetricsSum1 minuteHTTPCode_ELB_503_Count有就加ApplicationELB Per AppELB MetricsSum1 minute03-ALB-TG-LatencyTargetResponseTimeApplicationELB Per AppELB, per TG MetricsAverage1 minuteTargetResponseTimeApplicationELB Per AppELB, per TG Metricsp951 minute04-TG-HealthHealthyHostCountApplicationELB Per AppELB, per TG MetricsMinimum1 minuteUnHealthyHostCountApplicationELB Per AppELB, per TG MetricsMaximum1 minute05-ASG-CapacityGroupDesiredCapacity不是 ApplicationELB返回全部 → Auto Scaling →按 Auto Scaling GroupAverage1 minuteGroupInServiceInstancesAuto Scaling →按 Auto Scaling GroupAverage1 minuteGroupPendingInstancesAuto Scaling →按 Auto Scaling GroupMaximum1 minute告警告警名称CloudWatch进入路径资源选择指标 MetricStatisticPeriod告警条件CC-ALARM-UnhealthyTargetApplicationELB → Per AppELB, per TG MetricsCC-ALB CC-TGUnHealthyHostCountMaximum1 minute 1CC-ALARM-Target5XXApplicationELB → Per AppELB, per TG MetricsCC-ALB CC-TGHTTPCode_Target_5XX_CountSum1 minute 1CC-ALARM-HighLatencyApplicationELB → Per AppELB, per TG MetricsCC-ALB CC-TGTargetResponseTimep951 minute 2 秒CC-ALARM-ELB5XX可选ApplicationELB → Per AppELB MetricsCC-ALBHTTPCode_ELB_5XX_CountSum1 minute 1CC-ALARM-RDS-HighCPURDS → DBInstanceIdentifiercc-rdsCPUUtilizationAverage1 minute 65%ASG策略用途指标条件动作现有 Target Tracking正常自动扩缩RequestCountPerTargetTarget200自动加减实例新增 Step Scaling突发流量快速扩容RequestCountPerTarget400160029003先创建告警CC-ALARM-BurstTrafficPer AppELB, per TG Metrics -- RequestCountPerTargetStatistic SumPeriod 1 minute