看不到 CloudFormation cloudwatch 命名空间

Question

我正在尝试创建一个 cloudwatch 闹钟，如下所示：

  503AlarmELB:
    Type: AWS::CloudWatch::Alarm
    DeletionPolicy: Retain
    Properties:
      AlarmDescription: "503 HTTP CODE Count is higher than 20"
      # AlarmName: !Join ["-", [ !Ref Namespace, !Ref Environment, "ALB-HTTPCode_ELB_503_Count" ]]
      AlarmActions:
      - Ref: ManagedCloudSNSTopic
      MetricName: "HTTPCode_ELB_503_Count"
      Namespace: TriAppsTestV2ApplicationELB
      Statistic: Average
      Period:
        Ref: 503AlarmPeriod
      EvaluationPeriods: 
        Ref: 503AlarmEvaluationPeriods
      Threshold: 
        Ref: 503AlarmThreshold
      ComparisonOperator: GreaterThanOrEqualToThreshold
      Dimensions:
      - Name: InternalALB
        Value:
          Ref: InternalAlbFullName

并且在 Namespace 中我给出了值 TriAppsTestV2ApplicationELB。但是我在 CloudWatch 服务的 metrics 部分看不到这个。我怎样才能找到这个 Namespace？

Answer 1

该矩阵的命名空间是（来自 docs）：

Namespace: AWS/ApplicationELB