class aws_cdk.aws_logs.MetricFilter(scope, id, *, log_group, filter_pattern, metric_name, metric_namespace, default_value=None, metric_value=None)

Bases: Resource

A filter that extracts information from CloudWatch Logs and emits to CloudWatch Metrics.


lit=test/integ.metricfilter.lit.ts infused


MetricFilter(self, "MetricFilter",
  • scope (Construct) –

  • id (str) –

  • log_group (ILogGroup) – The log group to create the filter on.

  • filter_pattern (IFilterPattern) – Pattern to search for log events.

  • metric_name (str) – The name of the metric to emit.

  • metric_namespace (str) – The namespace of the metric to emit.

  • default_value (Union[int, float, None]) – The value to emit if the pattern does not match a particular event. Default: No metric emitted.

  • metric_value (Optional[str]) – The value to emit for the metric. Can either be a literal number (typically “1”), or the name of a field in the structure to take the value from the matched event. If you are using a field value, the field value must have been matched using the pattern. If you want to specify a field from a matched JSON structure, use ‘$.fieldName’, and make sure the field is in the pattern (if only as ‘$.fieldName = *’). If you want to specify a field from a matched space-delimited structure, use ‘$fieldName’. Default: “1”



Apply the given removal policy to this resource.

The Removal Policy controls what happens to this resource when it stops being managed by CloudFormation, either because you’ve removed it from the CDK application or because you’ve made a change that requires the resource to be replaced.

The resource can be deleted (RemovalPolicy.DESTROY), or left in your AWS account for data recovery and cleanup later (RemovalPolicy.RETAIN).


policy (RemovalPolicy) –

Return type:


metric(*, account=None, color=None, dimensions=None, dimensions_map=None, label=None, period=None, region=None, statistic=None, unit=None)

Return the given named metric for this Metric Filter.

  • account (Optional[str]) – Account which this metric comes from. Default: - Deployment account.

  • color (Optional[str]) – The hex color code, prefixed with ‘#’ (e.g. ‘#00ff00’), to use when this metric is rendered on a graph. The Color class has a set of standard colors that can be used here. Default: - Automatic color

  • dimensions (Optional[Mapping[str, Any]]) – (deprecated) Dimensions of the metric. Default: - No dimensions.

  • dimensions_map (Optional[Mapping[str, str]]) – Dimensions of the metric. Default: - No dimensions.

  • label (Optional[str]) – Label for this metric when added to a Graph in a Dashboard. You can use dynamic labels to show summary information about the entire displayed time series in the legend. For example, if you use:: [max: ${MAX}] MyMetric As the metric label, the maximum value in the visible range will be shown next to the time series name in the graph’s legend. Default: - No label

  • period (Optional[Duration]) – The period over which the specified statistic is applied. Default: Duration.minutes(5)

  • region (Optional[str]) – Region which this metric comes from. Default: - Deployment region.

  • statistic (Optional[str]) – What function to use for aggregating. Can be one of the following: - “Minimum” | “min” - “Maximum” | “max” - “Average” | “avg” - “Sum” | “sum” - “SampleCount | “n” - “pNN.NN” Default: Average

  • unit (Optional[Unit]) – Unit used to filter the metric stream. Only refer to datums emitted to the metric stream with the given unit and ignore all others. Only useful when datums are being emitted to the same metric stream under different units. The default is to use all matric datums in the stream, regardless of unit, which is recommended in nearly all cases. CloudWatch does not honor this property for graphs. Default: - All metric datums in the given metric stream


avg over 5 minutes

Return type:



Returns a string representation of this construct.

Return type:




The environment this resource belongs to.

For resources that are created and managed by the CDK (generally, those created by creating new class instances like Role, Bucket, etc.), this is always the same as the environment of the stack they belong to; however, for imported resources (those obtained from static methods like fromRoleArn, fromBucketName, etc.), that might be different than the stack they were imported into.


The construct tree node associated with this construct.


The stack in which this resource is defined.

Static Methods

classmethod is_construct(x)

Return whether the given object is a Construct.


x (Any) –

Return type:


classmethod is_resource(construct)

Check whether the given construct is a Resource.


construct (IConstruct) –

Return type: