ILogGroup

class aws_cdk.aws_logs.ILogGroup(*args, **kwargs)

Bases: IResourceWithPolicy, Protocol

Methods

add_metric_filter(id, *, filter_pattern, metric_name, metric_namespace, default_value=None, dimensions=None, filter_name=None, metric_value=None, unit=None)

Create a new Metric Filter on this Log Group.

Parameters:

  • id (str) – Unique identifier for the construct in its parent.

  • 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.

  • dimensions (Optional[Mapping[str, str]]) – The fields to use as dimensions for the metric. One metric filter can include as many as three dimensions. Default: - No dimensions attached to metrics.

  • filter_name (Optional[str]) – The name of the metric filter. Default: - Cloudformation generated name.

  • 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”

  • unit (Optional[Unit]) – The unit to assign to the metric. Default: - No unit attached to metrics.

Return type:

MetricFilter

add_stream(id, *, log_stream_name=None)

Create a new Log Stream for this Log Group.

Parameters:

  • id (str) – Unique identifier for the construct in its parent.

  • log_stream_name (Optional[str]) – The name of the log stream to create. The name must be unique within the log group. Default: Automatically generated

Return type:

LogStream

add_subscription_filter(id, *, destination, filter_pattern, distribution=None, filter_name=None)

Create a new Subscription Filter on this Log Group.

Parameters:

  • id (str) – Unique identifier for the construct in its parent.

  • destination (ILogSubscriptionDestination) – The destination to send the filtered events to. For example, a Kinesis stream or a Lambda function.

  • filter_pattern (IFilterPattern) – Log events matching this pattern will be sent to the destination.

  • distribution (Optional[Distribution]) – The method used to distribute log data to the destination. This property can only be used with KinesisDestination. Default: Distribution.BY_LOG_STREAM

  • filter_name (Optional[str]) – The name of the subscription filter. Default: Automatically generated

Return type:

SubscriptionFilter

add_to_resource_policy(statement)

Add a statement to the resource’s resource policy.

Parameters:

statement (PolicyStatement) –

Return type:

AddToResourcePolicyResult

apply_removal_policy(policy)

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).

Parameters:

policy (RemovalPolicy) –

Return type:

None

extract_metric(json_field, metric_namespace, metric_name)

Extract a metric from structured log events in the LogGroup.

Creates a MetricFilter on this LogGroup that will extract the value of the indicated JSON field in all records where it occurs.

The metric will be available in CloudWatch Metrics under the indicated namespace and name.

Parameters:

  • json_field (str) – JSON field to extract (example: ‘$.myfield’).

  • metric_namespace (str) – Namespace to emit the metric under.

  • metric_name (str) – Name to emit the metric under.

Return type:

Metric

Returns:

A Metric object representing the extracted metric

grant(grantee, *actions)

Give the indicated permissions on this log group and all streams.

Parameters:
Return type:

Grant

grant_read(grantee)

Give permissions to read from this log group and streams.

Parameters:

grantee (IGrantable) –

Return type:

Grant

grant_write(grantee)

Give permissions to write to create and write to streams in this log group.

Parameters:

grantee (IGrantable) –

Return type:

Grant

log_group_physical_name()

Public method to get the physical name of this log group.

Return type:

str

metric(metric_name, *, account=None, color=None, dimensions_map=None, label=None, period=None, region=None, stack_account=None, stack_region=None, statistic=None, unit=None)

Return the given named metric for this Log Group.

Parameters:

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

  • 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_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.

  • stack_account (Optional[str]) – Account of the stack this metric is attached to. Default: - Deployment account.

  • stack_region (Optional[str]) – Region of the stack this metric is attached to. Default: - Deployment region.

  • statistic (Optional[str]) – What function to use for aggregating. Use the aws_cloudwatch.Stats helper class to construct valid input strings. Can be one of the following: - “Minimum” | “min” - “Maximum” | “max” - “Average” | “avg” - “Sum” | “sum” - “SampleCount | “n” - “pNN.NN” - “tmNN.NN” | “tm(NN.NN%:NN.NN%)” - “iqm” - “wmNN.NN” | “wm(NN.NN%:NN.NN%)” - “tcNN.NN” | “tc(NN.NN%:NN.NN%)” - “tsNN.NN” | “ts(NN.NN%:NN.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

Return type:

Metric

metric_incoming_bytes(*, account=None, color=None, dimensions_map=None, label=None, period=None, region=None, stack_account=None, stack_region=None, statistic=None, unit=None)

The volume of log events in uncompressed bytes uploaded to CloudWatch Logs.

When used with the LogGroupName dimension, this is the volume of log events in uncompressed bytes uploaded to the log group.

Parameters:

  • 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_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.

  • stack_account (Optional[str]) – Account of the stack this metric is attached to. Default: - Deployment account.

  • stack_region (Optional[str]) – Region of the stack this metric is attached to. Default: - Deployment region.

  • statistic (Optional[str]) – What function to use for aggregating. Use the aws_cloudwatch.Stats helper class to construct valid input strings. Can be one of the following: - “Minimum” | “min” - “Maximum” | “max” - “Average” | “avg” - “Sum” | “sum” - “SampleCount | “n” - “pNN.NN” - “tmNN.NN” | “tm(NN.NN%:NN.NN%)” - “iqm” - “wmNN.NN” | “wm(NN.NN%:NN.NN%)” - “tcNN.NN” | “tc(NN.NN%:NN.NN%)” - “tsNN.NN” | “ts(NN.NN%:NN.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

Return type:

Metric

metric_incoming_log_events(*, account=None, color=None, dimensions_map=None, label=None, period=None, region=None, stack_account=None, stack_region=None, statistic=None, unit=None)

The number of log events uploaded to CloudWatch Logs.

When used with the LogGroupName dimension, this is the number of log events uploaded to the log group.

Parameters:

  • 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_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.

  • stack_account (Optional[str]) – Account of the stack this metric is attached to. Default: - Deployment account.

  • stack_region (Optional[str]) – Region of the stack this metric is attached to. Default: - Deployment region.

  • statistic (Optional[str]) – What function to use for aggregating. Use the aws_cloudwatch.Stats helper class to construct valid input strings. Can be one of the following: - “Minimum” | “min” - “Maximum” | “max” - “Average” | “avg” - “Sum” | “sum” - “SampleCount | “n” - “pNN.NN” - “tmNN.NN” | “tm(NN.NN%:NN.NN%)” - “iqm” - “wmNN.NN” | “wm(NN.NN%:NN.NN%)” - “tcNN.NN” | “tc(NN.NN%:NN.NN%)” - “tsNN.NN” | “ts(NN.NN%:NN.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

Return type:

Metric

Attributes

env

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.

log_group_arn

*’ appended.

Attribute:

true

Type:

The ARN of this log group, with ‘

log_group_name

The name of this log group.

Attribute:

true

node

The tree node.

stack

The stack in which this resource is defined.