cloudwatch-alarms.yaml

StackAlarmTopic:
    Type: AWS::SNS::Topic
    Properties:
        DisplayName: Stack Alarm Topic
        
DatabasePrimaryCPUAlarm:
    Type: AWS::CloudWatch::Alarm
    Properties:
        AlarmDescription: Primary database CPU utilization is over 80%.
        Namespace: AWS/RDS
        MetricName: CPUUtilization
        Unit: Percent
        Statistic: Average
        Period: 300
        EvaluationPeriods: 2
        Threshold: 80
        ComparisonOperator: GreaterThanOrEqualToThreshold
        Dimensions:
            - Name: DBInstanceIdentifier
              Value:
                  Ref: DatabasePrimaryInstance
        AlarmActions:
            - Ref: StackAlarmTopic
        InsufficientDataActions:
            - Ref: StackAlarmTopic
            
DatabaseReplicaCPUAlarm:
    Type: AWS::CloudWatch::Alarm
    Properties:
        AlarmDescription: Replica database CPU utilization is over 80%.
        Namespace: AWS/RDS
        MetricName: CPUUtilization
        Unit: Percent
        Statistic: Average
        Period: 300
        EvaluationPeriods: 2
        Threshold: 80
        ComparisonOperator: GreaterThanOrEqualToThreshold
        Dimensions:
            - Name: DBInstanceIdentifier
              Value:
                  Ref: DatabaseReplicaInstance
        AlarmActions:
            - Ref: StackAlarmTopic
        InsufficientDataActions:
            - Ref: StackAlarmTopic
            
DatabasePrimaryMemoryAlarm:
    Type: AWS::CloudWatch::Alarm
    Properties:
        AlarmDescription: Primary database freeable memory is under 700MB.
        Namespace: AWS/RDS
        MetricName: FreeableMemory
        Unit: Bytes
        Statistic: Average
        Period: 300
        EvaluationPeriods: 2
        Threshold: 700000000
        ComparisonOperator: LessThanOrEqualToThreshold
        Dimensions:
            - Name: DBInstanceIdentifier
              Value:
                  Ref: DatabasePrimaryInstance
        AlarmActions:
            - Ref: StackAlarmTopic
        InsufficientDataActions:
            - Ref: StackAlarmTopic
            
DatabasePrimaryReplicationAlarm:
    Type: AWS::CloudWatch::Alarm
    Properties:
        AlarmDescription: Database replication latency is over 200ms.
        Namespace: AWS/RDS
        MetricName: AuroraReplicaLag
        Unit: Milliseconds
        Statistic: Average
        Period: 300
        EvaluationPeriods: 2
        Threshold: 200
        ComparisonOperator: GreaterThanOrEqualToThreshold
        Dimensions:
            - Name: DBInstanceIdentifier
              Value:
                  Ref: DatabaseReplicaInstance
        AlarmActions:
            - Ref: StackAlarmTopic
            
DatabaseReplicaReplicationAlarm:
    Type: AWS::CloudWatch::Alarm
    Properties:
        AlarmDescription: Database replication latency is over 200ms.
        Namespace: AWS/RDS
        MetricName: AuroraReplicaLag
        Unit: Milliseconds
        Statistic: Average
        Period: 300
        EvaluationPeriods: 2
        Threshold: 200
        ComparisonOperator: GreaterThanOrEqualToThreshold
        Dimensions:
            - Name: DBInstanceIdentifier
              Value:
                  Ref: DatabaseReplicaInstance
        AlarmActions:
            - Ref: StackAlarmTopic