CODEWITHSUNDEEP
amazon-web-servicesaws-cloudformationamazon-cloudwatch
user2916639
user2916639

Reputation: 408

AWS Cloudwatch Alarm is not triggering after reaching threshold

I have configure aws monitoring perl script for disk and memory related matrics. I did set a alarm which notify me if diskspace utilization is more than 50%.

Please take a look to alarm state below. enter image description here

below is my cloudformation template alarm resource section.

#--------------------
# DiskSpace Alarms
#--------------------
    {{ component_name }}DiskBasedAlarm:
      Type: "AWS::CloudWatch::Alarm"
      Properties:
        AlarmDescription: "ASG Alarm if disk space utilization is more than 50% for more than 10 minutes."
        Namespace: System/Linux
        EvaluationPeriods: 10
        Period: 60
        ComparisonOperator: GreaterThanOrEqualToThreshold
        Statistic: Average
        Threshold: 50
        Unit: Percent
        TreatMissingData: ignore
        MetricName: DiskSpaceUtilization
        Dimensions:
          -
            Name: AutoScalingGroupName
            Value:
              Ref: WebASG
          -
            Name: MountPath
            Value: /
          -
            Name: Filesystem
            Value: /dev/nvme0n1p1
        AlarmActions:
          -
            Ref: CustomAlarmsNotifyTopic

Its been 3 - 4 hours but alarm is still in OK state. I have no idea why it is happening. Any suggestions ?

Upvotes: 0

Views: 811

Answers (1)

matesio
matesio

Reputation: 1604

Your alarm is set to average, change it to the maximum to enable trigger.

Statistic: Maximum

Upvotes: 1

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