autoscaling.yaml

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

CPUAlarmHigh:
    Type: AWS::CloudWatch::Alarm
    Properties:
        EvaluationPeriods: '1'
        Statistic: Average
        Threshold: '10'
        AlarmDescription: Alarm if CPU too high or metric disappears indicating instance is down
        Period: '60'
        AlarmActions:
        - Ref: ScaleUpPolicy
        Namespace: AWS/EC2
        Dimensions:
        - Name: AutoScalingGroupName
          Value:
            Ref: asGroup
        ComparisonOperator: GreaterThanThreshold
        MetricName: CPUUtilization