Scaling Policy and Alarms

scaling.yml

ScaleUpPolicy:
  Type: AWS::AutoScaling::ScalingPolicy
  Properties:
    AdjustmentType: ChangeInCapacity
    AutoScalingGroupName: !Ref ASG
    Cooldown: '1'
    ScalingAdjustment: 1

ScaleDownPolicy:
  Type: AWS::AutoScaling::ScalingPolicy
  Properties:
    AdjustmentType: ChangeInCapacity
    AutoScalingGroupName: !Ref ASG
    Cooldown: '1'
    ScalingAdjustment: -1

MemoryAlarmHigh:
 Type: AWS::CloudWatch::Alarm
 Properties:
   EvaluationPeriods: 1
   Statistic: Average
   Threshold: 70
   AlarmDescription: Go in Alarm is memory is higher than 70% for 60 seconds
   Period: 60
   AlarmActions:
   - Ref: ScaleUpPolicy
   Namespace: CWAgent
   Dimensions:
   - Name: AutoScalingGroupName
     Value: !Ref ASG
   ComparisonOperator: GreaterThanThreshold
   MetricName: mem_used_percent

MemoryAlarmLow:
 Type: AWS::CloudWatch::Alarm
 Properties:
   EvaluationPeriods: 1
   Statistic: Average
   Threshold: 30
   AlarmDescription: Go in Alarm is memory is lower than 30% for 60 seconds
   Period: 60
   AlarmActions:
   - Ref: ScaleDownPolicy
   Namespace: CWAgent
   Dimensions:
   - Name: AutoScalingGroupName
     Value: !Ref ASG
   ComparisonOperator: LessThanOrEqualToThreshold
   MetricName: mem_used_percent