How to provision AWS::Logs::MetricFilter

Serverless Framework
1

I would like to configure an AWS::Logs::MetricFilter, so that I can get a counter of logs which match a particular pattern.
http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-logs-metricfilter.html

However, this particular CloudFormation resource is not listed in the Serverless CF resource reference at

Does this mean that Serverless would need to be updated to support this? Or can I put unlisted CF resources in the YAML?

Thanks,

Brian.

2

I’m not familiar with this particular resource but in general you can use unlisted resources.

3

Yep, it’s just CloudFormation, so put in the resources section.

If you’re looking to filter your Lambda functions’ logs, you’ll need to work out their resource names from the docs.

4

Thanks @buggy and @rowanu. For reference, this works:

resources:
  Resources:
    ApiMetricFilter:
      Type: AWS::Logs::MetricFilter
      Properties:
        FilterPattern: SYS-EXCEPTION
        LogGroupName:
          Ref: ApiLogGroup
        MetricTransformations:
          - MetricName: sys-exception-api-${self:custom.stage}
            MetricNamespace: LogMetrics
            MetricValue: "1"

(Sadly, CloudFormation doesn’t allow setting DefaultValue: 0.0 under MetricTransformations, but that’s not Serverless’ fault)

Cheers,

Brian.

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