CfnAlarm

class aws_cdk.aws_cloudwatch.CfnAlarm(scope, id, *, comparison_operator, evaluation_periods, actions_enabled=None, alarm_actions=None, alarm_description=None, alarm_name=None, datapoints_to_alarm=None, dimensions=None, evaluate_low_sample_count_percentile=None, extended_statistic=None, insufficient_data_actions=None, metric_name=None, metrics=None, namespace=None, ok_actions=None, period=None, statistic=None, threshold=None, threshold_metric_id=None, treat_missing_data=None, unit=None)

Bases: aws_cdk.core.CfnResource

A CloudFormation AWS::CloudWatch::Alarm.

The AWS::CloudWatch::Alarm type specifies an alarm and associates it with the specified metric or metric math expression.

When this operation creates an alarm, the alarm state is immediately set to INSUFFICIENT_DATA . The alarm is then evaluated and its state is set appropriately. Any actions associated with the new state are then executed.

When you update an existing alarm, its state is left unchanged, but the update completely overwrites the previous configuration of the alarm.

CloudformationResource

AWS::CloudWatch::Alarm

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-alarm.html

ExampleMetadata

fixture=_generated

Example:

# The code below shows an example of how to instantiate this type.
# The values are placeholders you should change.
import aws_cdk.aws_cloudwatch as cloudwatch

cfn_alarm = cloudwatch.CfnAlarm(self, "MyCfnAlarm",
    comparison_operator="comparisonOperator",
    evaluation_periods=123,

    # the properties below are optional
    actions_enabled=False,
    alarm_actions=["alarmActions"],
    alarm_description="alarmDescription",
    alarm_name="alarmName",
    datapoints_to_alarm=123,
    dimensions=[cloudwatch.CfnAlarm.DimensionProperty(
        name="name",
        value="value"
    )],
    evaluate_low_sample_count_percentile="evaluateLowSampleCountPercentile",
    extended_statistic="extendedStatistic",
    insufficient_data_actions=["insufficientDataActions"],
    metric_name="metricName",
    metrics=[cloudwatch.CfnAlarm.MetricDataQueryProperty(
        id="id",

        # the properties below are optional
        account_id="accountId",
        expression="expression",
        label="label",
        metric_stat=cloudwatch.CfnAlarm.MetricStatProperty(
            metric=cloudwatch.CfnAlarm.MetricProperty(
                dimensions=[cloudwatch.CfnAlarm.DimensionProperty(
                    name="name",
                    value="value"
                )],
                metric_name="metricName",
                namespace="namespace"
            ),
            period=123,
            stat="stat",

            # the properties below are optional
            unit="unit"
        ),
        period=123,
        return_data=False
    )],
    namespace="namespace",
    ok_actions=["okActions"],
    period=123,
    statistic="statistic",
    threshold=123,
    threshold_metric_id="thresholdMetricId",
    treat_missing_data="treatMissingData",
    unit="unit"
)

Create a new AWS::CloudWatch::Alarm.

Parameters
  • scope (Construct) –

    • scope in which this resource is defined.

  • id (str) –

    • scoped id of the resource.

  • comparison_operator (str) – The arithmetic operation to use when comparing the specified statistic and threshold. The specified statistic value is used as the first operand. You can specify the following values: GreaterThanThreshold , GreaterThanOrEqualToThreshold , LessThanThreshold , or LessThanOrEqualToThreshold .

  • evaluation_periods (Union[int, float]) – The number of periods over which data is compared to the specified threshold. If you are setting an alarm that requires that a number of consecutive data points be breaching to trigger the alarm, this value specifies that number. If you are setting an “M out of N” alarm, this value is the N, and DatapointsToAlarm is the M. For more information, see Evaluating an Alarm in the Amazon CloudWatch User Guide .

  • actions_enabled (Union[bool, IResolvable, None]) – Indicates whether actions should be executed during any changes to the alarm state. The default is TRUE.

  • alarm_actions (Optional[Sequence[str]]) – The list of actions to execute when this alarm transitions into an ALARM state from any other state. Specify each action as an Amazon Resource Name (ARN). For more information about creating alarms and the actions that you can specify, see PutMetricAlarm in the Amazon CloudWatch API Reference .

  • alarm_description (Optional[str]) – The description of the alarm.

  • alarm_name (Optional[str]) – The name of the alarm. If you don’t specify a name, AWS CloudFormation generates a unique physical ID and uses that ID for the alarm name. .. epigraph:: If you specify a name, you cannot perform updates that require replacement of this resource. You can perform updates that require no or some interruption. If you must replace the resource, specify a new name.

  • datapoints_to_alarm (Union[int, float, None]) –

    The number of datapoints that must be breaching to trigger the alarm. This is used only if you are setting an “M out of N” alarm. In that case, this value is the M, and the value that you set for EvaluationPeriods is the N value. For more information, see Evaluating an Alarm in the Amazon CloudWatch User Guide . If you omit this parameter, CloudWatch uses the same value here that you set for EvaluationPeriods , and the alarm goes to alarm state if that many consecutive periods are breaching.

  • dimensions (Union[IResolvable, Sequence[Union[IResolvable, DimensionProperty, Dict[str, Any]]], None]) – The dimensions for the metric associated with the alarm. For an alarm based on a math expression, you can’t specify Dimensions . Instead, you use Metrics .

  • evaluate_low_sample_count_percentile (Optional[str]) – Used only for alarms based on percentiles. If ignore , the alarm state does not change during periods with too few data points to be statistically significant. If evaluate or this parameter is not used, the alarm is always evaluated and possibly changes state no matter how many data points are available.

  • extended_statistic (Optional[str]) – The percentile statistic for the metric associated with the alarm. Specify a value between p0.0 and p100. For an alarm based on a metric, you must specify either Statistic or ExtendedStatistic but not both. For an alarm based on a math expression, you can’t specify ExtendedStatistic . Instead, you use Metrics .

  • insufficient_data_actions (Optional[Sequence[str]]) – The actions to execute when this alarm transitions to the INSUFFICIENT_DATA state from any other state. Each action is specified as an Amazon Resource Name (ARN).

  • metric_name (Optional[str]) – The name of the metric associated with the alarm. This is required for an alarm based on a metric. For an alarm based on a math expression, you use Metrics instead and you can’t specify MetricName .

  • metrics (Union[IResolvable, Sequence[Union[IResolvable, MetricDataQueryProperty, Dict[str, Any]]], None]) – An array that enables you to create an alarm based on the result of a metric math expression. Each item in the array either retrieves a metric or performs a math expression. If you specify the Metrics parameter, you cannot specify MetricName , Dimensions , Period , Namespace , Statistic , ExtendedStatistic , or Unit .

  • namespace (Optional[str]) – The namespace of the metric associated with the alarm. This is required for an alarm based on a metric. For an alarm based on a math expression, you can’t specify Namespace and you use Metrics instead. For a list of namespaces for metrics from AWS services, see AWS Services That Publish CloudWatch Metrics.

  • ok_actions (Optional[Sequence[str]]) – The actions to execute when this alarm transitions to the OK state from any other state. Each action is specified as an Amazon Resource Name (ARN).

  • period (Union[int, float, None]) – The period, in seconds, over which the statistic is applied. This is required for an alarm based on a metric. Valid values are 10, 30, 60, and any multiple of 60. For an alarm based on a math expression, you can’t specify Period , and instead you use the Metrics parameter. Minimum: 10

  • statistic (Optional[str]) – The statistic for the metric associated with the alarm, other than percentile. For percentile statistics, use ExtendedStatistic . For an alarm based on a metric, you must specify either Statistic or ExtendedStatistic but not both. For an alarm based on a math expression, you can’t specify Statistic . Instead, you use Metrics .

  • threshold (Union[int, float, None]) – The value to compare with the specified statistic.

  • threshold_metric_id (Optional[str]) – In an alarm based on an anomaly detection model, this is the ID of the ANOMALY_DETECTION_BAND function used as the threshold for the alarm.

  • treat_missing_data (Optional[str]) – Sets how this alarm is to handle missing data points. Valid values are breaching , notBreaching , ignore , and missing . For more information, see Configuring How CloudWatch Alarms Treat Missing Data in the Amazon CloudWatch User Guide . If you omit this parameter, the default behavior of missing is used.

  • unit (Optional[str]) – The unit of the metric associated with the alarm. Specify this only if you are creating an alarm based on a single metric. Do not specify this if you are specifying a Metrics array. You can specify the following values: Seconds, Microseconds, Milliseconds, Bytes, Kilobytes, Megabytes, Gigabytes, Terabytes, Bits, Kilobits, Megabits, Gigabits, Terabits, Percent, Count, Bytes/Second, Kilobytes/Second, Megabytes/Second, Gigabytes/Second, Terabytes/Second, Bits/Second, Kilobits/Second, Megabits/Second, Gigabits/Second, Terabits/Second, Count/Second, or None.

Methods

add_deletion_override(path)

Syntactic sugar for addOverride(path, undefined).

Parameters

path (str) – The path of the value to delete.

Return type

None

add_depends_on(target)

Indicates that this resource depends on another resource and cannot be provisioned unless the other resource has been successfully provisioned.

This can be used for resources across stacks (or nested stack) boundaries and the dependency will automatically be transferred to the relevant scope.

Parameters

target (CfnResource) –

Return type

None

add_metadata(key, value)

Add a value to the CloudFormation Resource Metadata.

Parameters
  • key (str) –

  • value (Any) –

See

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/metadata-section-structure.html

Note that this is a different set of metadata from CDK node metadata; this metadata ends up in the stack template under the resource, whereas CDK node metadata ends up in the Cloud Assembly.

Return type

None

add_override(path, value)

Adds an override to the synthesized CloudFormation resource.

To add a property override, either use addPropertyOverride or prefix path with “Properties.” (i.e. Properties.TopicName).

If the override is nested, separate each nested level using a dot (.) in the path parameter. If there is an array as part of the nesting, specify the index in the path.

To include a literal . in the property name, prefix with a \. In most programming languages you will need to write this as "\\." because the \ itself will need to be escaped.

For example:

cfn_resource.add_override("Properties.GlobalSecondaryIndexes.0.Projection.NonKeyAttributes", ["myattribute"])
cfn_resource.add_override("Properties.GlobalSecondaryIndexes.1.ProjectionType", "INCLUDE")

would add the overrides Example:

"Properties": {
   "GlobalSecondaryIndexes": [
     {
       "Projection": {
         "NonKeyAttributes": [ "myattribute" ]
         ...
       }
       ...
     },
     {
       "ProjectionType": "INCLUDE"
       ...
     },
   ]
   ...
}

The value argument to addOverride will not be processed or translated in any way. Pass raw JSON values in here with the correct capitalization for CloudFormation. If you pass CDK classes or structs, they will be rendered with lowercased key names, and CloudFormation will reject the template.

Parameters
  • path (str) –

    • The path of the property, you can use dot notation to override values in complex types. Any intermdediate keys will be created as needed.

  • value (Any) –

    • The value. Could be primitive or complex.

Return type

None

add_property_deletion_override(property_path)

Adds an override that deletes the value of a property from the resource definition.

Parameters

property_path (str) – The path to the property.

Return type

None

add_property_override(property_path, value)

Adds an override to a resource property.

Syntactic sugar for addOverride("Properties.<...>", value).

Parameters
  • property_path (str) – The path of the property.

  • value (Any) – The value.

Return type

None

apply_removal_policy(policy=None, *, apply_to_update_replace_policy=None, default=None)

Sets the deletion policy of the resource based on the removal policy specified.

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 (Optional[RemovalPolicy]) –

  • apply_to_update_replace_policy (Optional[bool]) – Apply the same deletion policy to the resource’s “UpdateReplacePolicy”. Default: true

  • default (Optional[RemovalPolicy]) – The default policy to apply in case the removal policy is not defined. Default: - Default value is resource specific. To determine the default value for a resoure, please consult that specific resource’s documentation.

Return type

None

get_att(attribute_name)

Returns a token for an runtime attribute of this resource.

Ideally, use generated attribute accessors (e.g. resource.arn), but this can be used for future compatibility in case there is no generated attribute.

Parameters

attribute_name (str) – The name of the attribute.

Return type

Reference

get_metadata(key)

Retrieve a value value from the CloudFormation Resource Metadata.

Parameters

key (str) –

See

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/metadata-section-structure.html

Note that this is a different set of metadata from CDK node metadata; this metadata ends up in the stack template under the resource, whereas CDK node metadata ends up in the Cloud Assembly.

Return type

Any

inspect(inspector)

Examines the CloudFormation resource and discloses attributes.

Parameters

inspector (TreeInspector) –

  • tree inspector to collect and process attributes.

Return type

None

override_logical_id(new_logical_id)

Overrides the auto-generated logical ID with a specific ID.

Parameters

new_logical_id (str) – The new logical ID to use for this stack element.

Return type

None

to_string()

Returns a string representation of this construct.

Return type

str

Returns

a string representation of this resource

Attributes

CFN_RESOURCE_TYPE_NAME = 'AWS::CloudWatch::Alarm'
actions_enabled

Indicates whether actions should be executed during any changes to the alarm state.

The default is TRUE.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-alarm.html#cfn-cloudwatch-alarms-actionsenabled

Return type

Union[bool, IResolvable, None]

alarm_actions

The list of actions to execute when this alarm transitions into an ALARM state from any other state.

Specify each action as an Amazon Resource Name (ARN). For more information about creating alarms and the actions that you can specify, see PutMetricAlarm in the Amazon CloudWatch API Reference .

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-alarm.html#cfn-cloudwatch-alarms-alarmactions

Return type

Optional[List[str]]

alarm_description

The description of the alarm.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-alarm.html#cfn-cloudwatch-alarms-alarmdescription

Return type

Optional[str]

alarm_name

The name of the alarm.

If you don’t specify a name, AWS CloudFormation generates a unique physical ID and uses that ID for the alarm name. .. epigraph:

If you specify a name, you cannot perform updates that require replacement of this resource. You can perform updates that require no or some interruption. If you must replace the resource, specify a new name.
Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-alarm.html#cfn-cloudwatch-alarms-alarmname

Return type

Optional[str]

attr_arn

The ARN of the CloudWatch alarm, such as arn:aws:cloudwatch:us-west-2:123456789012:alarm:myCloudWatchAlarm-CPUAlarm-UXMMZK36R55Z .

CloudformationAttribute

Arn

Return type

str

cfn_options

Options for this resource, such as condition, update policy etc.

Return type

ICfnResourceOptions

cfn_resource_type

AWS resource type.

Return type

str

comparison_operator

The arithmetic operation to use when comparing the specified statistic and threshold.

The specified statistic value is used as the first operand.

You can specify the following values: GreaterThanThreshold , GreaterThanOrEqualToThreshold , LessThanThreshold , or LessThanOrEqualToThreshold .

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-alarm.html#cfn-cloudwatch-alarms-comparisonoperator

Return type

str

creation_stack

return:

the stack trace of the point where this Resource was created from, sourced from the +metadata+ entry typed +aws:cdk:logicalId+, and with the bottom-most node +internal+ entries filtered.

Return type

List[str]

datapoints_to_alarm

The number of datapoints that must be breaching to trigger the alarm.

This is used only if you are setting an “M out of N” alarm. In that case, this value is the M, and the value that you set for EvaluationPeriods is the N value. For more information, see Evaluating an Alarm in the Amazon CloudWatch User Guide .

If you omit this parameter, CloudWatch uses the same value here that you set for EvaluationPeriods , and the alarm goes to alarm state if that many consecutive periods are breaching.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-alarm.html#cfn-cloudwatch-alarm-datapointstoalarm

Return type

Union[int, float, None]

dimensions

The dimensions for the metric associated with the alarm.

For an alarm based on a math expression, you can’t specify Dimensions . Instead, you use Metrics .

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-alarm.html#cfn-cloudwatch-alarms-dimension

Return type

Union[IResolvable, List[Union[IResolvable, DimensionProperty]], None]

evaluate_low_sample_count_percentile

Used only for alarms based on percentiles.

If ignore , the alarm state does not change during periods with too few data points to be statistically significant. If evaluate or this parameter is not used, the alarm is always evaluated and possibly changes state no matter how many data points are available.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-alarm.html#cfn-cloudwatch-alarms-evaluatelowsamplecountpercentile

Return type

Optional[str]

evaluation_periods

The number of periods over which data is compared to the specified threshold.

If you are setting an alarm that requires that a number of consecutive data points be breaching to trigger the alarm, this value specifies that number. If you are setting an “M out of N” alarm, this value is the N, and DatapointsToAlarm is the M.

For more information, see Evaluating an Alarm in the Amazon CloudWatch User Guide .

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-alarm.html#cfn-cloudwatch-alarms-evaluationperiods

Return type

Union[int, float]

extended_statistic

The percentile statistic for the metric associated with the alarm. Specify a value between p0.0 and p100.

For an alarm based on a metric, you must specify either Statistic or ExtendedStatistic but not both.

For an alarm based on a math expression, you can’t specify ExtendedStatistic . Instead, you use Metrics .

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-alarm.html#cfn-cloudwatch-alarms-extendedstatistic

Return type

Optional[str]

insufficient_data_actions

The actions to execute when this alarm transitions to the INSUFFICIENT_DATA state from any other state.

Each action is specified as an Amazon Resource Name (ARN).

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-alarm.html#cfn-cloudwatch-alarms-insufficientdataactions

Return type

Optional[List[str]]

logical_id

The logical ID for this CloudFormation stack element.

The logical ID of the element is calculated from the path of the resource node in the construct tree.

To override this value, use overrideLogicalId(newLogicalId).

Return type

str

Returns

the logical ID as a stringified token. This value will only get resolved during synthesis.

metric_name

The name of the metric associated with the alarm.

This is required for an alarm based on a metric. For an alarm based on a math expression, you use Metrics instead and you can’t specify MetricName .

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-alarm.html#cfn-cloudwatch-alarms-metricname

Return type

Optional[str]

metrics

An array that enables you to create an alarm based on the result of a metric math expression.

Each item in the array either retrieves a metric or performs a math expression.

If you specify the Metrics parameter, you cannot specify MetricName , Dimensions , Period , Namespace , Statistic , ExtendedStatistic , or Unit .

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-alarm.html#cfn-cloudwatch-alarm-metrics

Return type

Union[IResolvable, List[Union[IResolvable, MetricDataQueryProperty]], None]

namespace

The namespace of the metric associated with the alarm.

This is required for an alarm based on a metric. For an alarm based on a math expression, you can’t specify Namespace and you use Metrics instead.

For a list of namespaces for metrics from AWS services, see AWS Services That Publish CloudWatch Metrics.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-alarm.html#cfn-cloudwatch-alarms-namespace

Return type

Optional[str]

node

The construct tree node associated with this construct.

Return type

ConstructNode

ok_actions

The actions to execute when this alarm transitions to the OK state from any other state.

Each action is specified as an Amazon Resource Name (ARN).

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-alarm.html#cfn-cloudwatch-alarms-okactions

Return type

Optional[List[str]]

period

The period, in seconds, over which the statistic is applied.

This is required for an alarm based on a metric. Valid values are 10, 30, 60, and any multiple of 60.

For an alarm based on a math expression, you can’t specify Period , and instead you use the Metrics parameter.

Minimum: 10

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-alarm.html#cfn-cloudwatch-alarms-period

Return type

Union[int, float, None]

ref

Return a string that will be resolved to a CloudFormation { Ref } for this element.

If, by any chance, the intrinsic reference of a resource is not a string, you could coerce it to an IResolvable through Lazy.any({ produce: resource.ref }).

Return type

str

stack

The stack in which this element is defined.

CfnElements must be defined within a stack scope (directly or indirectly).

Return type

Stack

statistic

The statistic for the metric associated with the alarm, other than percentile. For percentile statistics, use ExtendedStatistic .

For an alarm based on a metric, you must specify either Statistic or ExtendedStatistic but not both.

For an alarm based on a math expression, you can’t specify Statistic . Instead, you use Metrics .

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-alarm.html#cfn-cloudwatch-alarms-statistic

Return type

Optional[str]

threshold

The value to compare with the specified statistic.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-alarm.html#cfn-cloudwatch-alarms-threshold

Return type

Union[int, float, None]

threshold_metric_id

In an alarm based on an anomaly detection model, this is the ID of the ANOMALY_DETECTION_BAND function used as the threshold for the alarm.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-alarm.html#cfn-cloudwatch-alarms-dynamic-threshold

Return type

Optional[str]

treat_missing_data

Sets how this alarm is to handle missing data points.

Valid values are breaching , notBreaching , ignore , and missing . For more information, see Configuring How CloudWatch Alarms Treat Missing Data in the Amazon CloudWatch User Guide .

If you omit this parameter, the default behavior of missing is used.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-alarm.html#cfn-cloudwatch-alarms-treatmissingdata

Return type

Optional[str]

unit

The unit of the metric associated with the alarm.

Specify this only if you are creating an alarm based on a single metric. Do not specify this if you are specifying a Metrics array.

You can specify the following values: Seconds, Microseconds, Milliseconds, Bytes, Kilobytes, Megabytes, Gigabytes, Terabytes, Bits, Kilobits, Megabits, Gigabits, Terabits, Percent, Count, Bytes/Second, Kilobytes/Second, Megabytes/Second, Gigabytes/Second, Terabytes/Second, Bits/Second, Kilobits/Second, Megabits/Second, Gigabits/Second, Terabits/Second, Count/Second, or None.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-alarm.html#cfn-cloudwatch-alarms-unit

Return type

Optional[str]

Static Methods

classmethod is_cfn_element(x)

Returns true if a construct is a stack element (i.e. part of the synthesized cloudformation template).

Uses duck-typing instead of instanceof to allow stack elements from different versions of this library to be included in the same stack.

Parameters

x (Any) –

Return type

bool

Returns

The construct as a stack element or undefined if it is not a stack element.

classmethod is_cfn_resource(construct)

Check whether the given construct is a CfnResource.

Parameters

construct (IConstruct) –

Return type

bool

classmethod is_construct(x)

Return whether the given object is a Construct.

Parameters

x (Any) –

Return type

bool

DimensionProperty

class CfnAlarm.DimensionProperty(*, name, value)

Bases: object

Dimension is an embedded property of the AWS::CloudWatch::Alarm type.

Dimensions are name/value pairs that can be associated with a CloudWatch metric. You can specify a maximum of 10 dimensions for a given metric.

Parameters
  • name (str) – The name of the dimension, from 1–255 characters in length. This dimension name must have been included when the metric was published.

  • value (str) – The value for the dimension, from 1–255 characters in length.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-dimension.html

ExampleMetadata

fixture=_generated

Example:

# The code below shows an example of how to instantiate this type.
# The values are placeholders you should change.
import aws_cdk.aws_cloudwatch as cloudwatch

dimension_property = cloudwatch.CfnAlarm.DimensionProperty(
    name="name",
    value="value"
)

Attributes

name

The name of the dimension, from 1–255 characters in length.

This dimension name must have been included when the metric was published.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-dimension.html#cfn-cloudwatch-alarm-dimension-name

Return type

str

value

The value for the dimension, from 1–255 characters in length.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cw-dimension.html#cfn-cloudwatch-alarm-dimension-value

Return type

str

MetricDataQueryProperty

class CfnAlarm.MetricDataQueryProperty(*, id, account_id=None, expression=None, label=None, metric_stat=None, period=None, return_data=None)

Bases: object

The MetricDataQuery property type specifies the metric data to return, and whether this call is just retrieving a batch set of data for one metric, or is performing a math expression on metric data.

Any expression used must return a single time series. For more information, see Metric Math Syntax and Functions in the Amazon CloudWatch User Guide .

Parameters
  • id (str) – A short name used to tie this object to the results in the response. This name must be unique within a single call to GetMetricData . If you are performing math expressions on this set of data, this name represents that data and can serve as a variable in the mathematical expression. The valid characters are letters, numbers, and underscore. The first character must be a lowercase letter.

  • account_id (Optional[str]) – The ID of the account where the metrics are located, if this is a cross-account alarm.

  • expression (Optional[str]) –

    The math expression to be performed on the returned data, if this object is performing a math expression. This expression can use the Id of the other metrics to refer to those metrics, and can also use the Id of other expressions to use the result of those expressions. For more information about metric math expressions, see Metric Math Syntax and Functions in the Amazon CloudWatch User Guide . Within each MetricDataQuery object, you must specify either Expression or MetricStat but not both.

  • label (Optional[str]) – A human-readable label for this metric or expression. This is especially useful if this is an expression, so that you know what the value represents. If the metric or expression is shown in a CloudWatch dashboard widget, the label is shown. If Label is omitted, CloudWatch generates a default.

  • metric_stat (Union[IResolvable, MetricStatProperty, Dict[str, Any], None]) – The metric to be returned, along with statistics, period, and units. Use this parameter only if this object is retrieving a metric and not performing a math expression on returned data. Within one MetricDataQuery object, you must specify either Expression or MetricStat but not both.

  • period (Union[int, float, None]) – The granularity, in seconds, of the returned data points. For metrics with regular resolution, a period can be as short as one minute (60 seconds) and must be a multiple of 60. For high-resolution metrics that are collected at intervals of less than one minute, the period can be 1, 5, 10, 30, 60, or any multiple of 60. High-resolution metrics are those metrics stored by a PutMetricData operation that includes a StorageResolution of 1 second .

  • return_data (Union[bool, IResolvable, None]) – This option indicates whether to return the timestamps and raw data values of this metric. When you create an alarm based on a metric math expression, specify True for this value for only the one math expression that the alarm is based on. You must specify False for ReturnData for all the other metrics and expressions used in the alarm. This field is required.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cloudwatch-alarm-metricdataquery.html

ExampleMetadata

fixture=_generated

Example:

# The code below shows an example of how to instantiate this type.
# The values are placeholders you should change.
import aws_cdk.aws_cloudwatch as cloudwatch

metric_data_query_property = cloudwatch.CfnAlarm.MetricDataQueryProperty(
    id="id",

    # the properties below are optional
    account_id="accountId",
    expression="expression",
    label="label",
    metric_stat=cloudwatch.CfnAlarm.MetricStatProperty(
        metric=cloudwatch.CfnAlarm.MetricProperty(
            dimensions=[cloudwatch.CfnAlarm.DimensionProperty(
                name="name",
                value="value"
            )],
            metric_name="metricName",
            namespace="namespace"
        ),
        period=123,
        stat="stat",

        # the properties below are optional
        unit="unit"
    ),
    period=123,
    return_data=False
)

Attributes

account_id

The ID of the account where the metrics are located, if this is a cross-account alarm.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cloudwatch-alarm-metricdataquery.html#cfn-cloudwatch-alarm-metricdataquery-accountid

Return type

Optional[str]

expression

The math expression to be performed on the returned data, if this object is performing a math expression.

This expression can use the Id of the other metrics to refer to those metrics, and can also use the Id of other expressions to use the result of those expressions. For more information about metric math expressions, see Metric Math Syntax and Functions in the Amazon CloudWatch User Guide .

Within each MetricDataQuery object, you must specify either Expression or MetricStat but not both.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cloudwatch-alarm-metricdataquery.html#cfn-cloudwatch-alarm-metricdataquery-expression

Return type

Optional[str]

id

A short name used to tie this object to the results in the response.

This name must be unique within a single call to GetMetricData . If you are performing math expressions on this set of data, this name represents that data and can serve as a variable in the mathematical expression. The valid characters are letters, numbers, and underscore. The first character must be a lowercase letter.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cloudwatch-alarm-metricdataquery.html#cfn-cloudwatch-alarm-metricdataquery-id

Return type

str

label

A human-readable label for this metric or expression.

This is especially useful if this is an expression, so that you know what the value represents. If the metric or expression is shown in a CloudWatch dashboard widget, the label is shown. If Label is omitted, CloudWatch generates a default.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cloudwatch-alarm-metricdataquery.html#cfn-cloudwatch-alarm-metricdataquery-label

Return type

Optional[str]

metric_stat

The metric to be returned, along with statistics, period, and units.

Use this parameter only if this object is retrieving a metric and not performing a math expression on returned data.

Within one MetricDataQuery object, you must specify either Expression or MetricStat but not both.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cloudwatch-alarm-metricdataquery.html#cfn-cloudwatch-alarm-metricdataquery-metricstat

Return type

Union[IResolvable, MetricStatProperty, None]

period

The granularity, in seconds, of the returned data points.

For metrics with regular resolution, a period can be as short as one minute (60 seconds) and must be a multiple of 60. For high-resolution metrics that are collected at intervals of less than one minute, the period can be 1, 5, 10, 30, 60, or any multiple of 60. High-resolution metrics are those metrics stored by a PutMetricData operation that includes a StorageResolution of 1 second .

Return type

Union[int, float, None]

return_data

This option indicates whether to return the timestamps and raw data values of this metric.

When you create an alarm based on a metric math expression, specify True for this value for only the one math expression that the alarm is based on. You must specify False for ReturnData for all the other metrics and expressions used in the alarm.

This field is required.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cloudwatch-alarm-metricdataquery.html#cfn-cloudwatch-alarm-metricdataquery-returndata

Return type

Union[bool, IResolvable, None]

MetricProperty

class CfnAlarm.MetricProperty(*, dimensions=None, metric_name=None, namespace=None)

Bases: object

The Metric property type represents a specific metric.

Metric is a property of the MetricStat property type.

Parameters
  • dimensions (Union[IResolvable, Sequence[Union[IResolvable, DimensionProperty, Dict[str, Any]]], None]) – The metric dimensions that you want to be used for the metric that the alarm will watch..

  • metric_name (Optional[str]) – The name of the metric that you want the alarm to watch. This is a required field.

  • namespace (Optional[str]) – The namespace of the metric that the alarm will watch.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cloudwatch-alarm-metric.html

ExampleMetadata

fixture=_generated

Example:

# The code below shows an example of how to instantiate this type.
# The values are placeholders you should change.
import aws_cdk.aws_cloudwatch as cloudwatch

metric_property = cloudwatch.CfnAlarm.MetricProperty(
    dimensions=[cloudwatch.CfnAlarm.DimensionProperty(
        name="name",
        value="value"
    )],
    metric_name="metricName",
    namespace="namespace"
)

Attributes

dimensions

The metric dimensions that you want to be used for the metric that the alarm will watch..

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cloudwatch-alarm-metric.html#cfn-cloudwatch-alarm-metric-dimensions

Return type

Union[IResolvable, List[Union[IResolvable, DimensionProperty]], None]

metric_name

The name of the metric that you want the alarm to watch.

This is a required field.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cloudwatch-alarm-metric.html#cfn-cloudwatch-alarm-metric-metricname

Return type

Optional[str]

namespace

The namespace of the metric that the alarm will watch.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cloudwatch-alarm-metric.html#cfn-cloudwatch-alarm-metric-namespace

Return type

Optional[str]

MetricStatProperty

class CfnAlarm.MetricStatProperty(*, metric, period, stat, unit=None)

Bases: object

This structure defines the metric to be returned, along with the statistics, period, and units.

MetricStat is a property of the MetricDataQuery property type.

Parameters
  • metric (Union[IResolvable, MetricProperty, Dict[str, Any]]) – The metric to return, including the metric name, namespace, and dimensions.

  • period (Union[int, float]) – The granularity, in seconds, of the returned data points. For metrics with regular resolution, a period can be as short as one minute (60 seconds) and must be a multiple of 60. For high-resolution metrics that are collected at intervals of less than one minute, the period can be 1, 5, 10, 30, 60, or any multiple of 60. High-resolution metrics are those metrics stored by a PutMetricData call that includes a StorageResolution of 1 second. If the StartTime parameter specifies a time stamp that is greater than 3 hours ago, you must specify the period as follows or no data points in that time range is returned: - Start time between 3 hours and 15 days ago - Use a multiple of 60 seconds (1 minute). - Start time between 15 and 63 days ago - Use a multiple of 300 seconds (5 minutes). - Start time greater than 63 days ago - Use a multiple of 3600 seconds (1 hour).

  • stat (str) – The statistic to return. It can include any CloudWatch statistic or extended statistic. For a list of valid values, see the table in Statistics in the Amazon CloudWatch User Guide .

  • unit (Optional[str]) – The unit to use for the returned data points. Valid values are: Seconds, Microseconds, Milliseconds, Bytes, Kilobytes, Megabytes, Gigabytes, Terabytes, Bits, Kilobits, Megabits, Gigabits, Terabits, Percent, Count, Bytes/Second, Kilobytes/Second, Megabytes/Second, Gigabytes/Second, Terabytes/Second, Bits/Second, Kilobits/Second, Megabits/Second, Gigabits/Second, Terabits/Second, Count/Second, or None.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cloudwatch-alarm-metricstat.html

ExampleMetadata

fixture=_generated

Example:

# The code below shows an example of how to instantiate this type.
# The values are placeholders you should change.
import aws_cdk.aws_cloudwatch as cloudwatch

metric_stat_property = cloudwatch.CfnAlarm.MetricStatProperty(
    metric=cloudwatch.CfnAlarm.MetricProperty(
        dimensions=[cloudwatch.CfnAlarm.DimensionProperty(
            name="name",
            value="value"
        )],
        metric_name="metricName",
        namespace="namespace"
    ),
    period=123,
    stat="stat",

    # the properties below are optional
    unit="unit"
)

Attributes

metric

The metric to return, including the metric name, namespace, and dimensions.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cloudwatch-alarm-metricstat.html#cfn-cloudwatch-alarm-metricstat-metric

Return type

Union[IResolvable, MetricProperty]

period

The granularity, in seconds, of the returned data points.

For metrics with regular resolution, a period can be as short as one minute (60 seconds) and must be a multiple of 60. For high-resolution metrics that are collected at intervals of less than one minute, the period can be 1, 5, 10, 30, 60, or any multiple of 60. High-resolution metrics are those metrics stored by a PutMetricData call that includes a StorageResolution of 1 second.

If the StartTime parameter specifies a time stamp that is greater than 3 hours ago, you must specify the period as follows or no data points in that time range is returned:

  • Start time between 3 hours and 15 days ago - Use a multiple of 60 seconds (1 minute).

  • Start time between 15 and 63 days ago - Use a multiple of 300 seconds (5 minutes).

  • Start time greater than 63 days ago - Use a multiple of 3600 seconds (1 hour).

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cloudwatch-alarm-metricstat.html#cfn-cloudwatch-alarm-metricstat-period

Return type

Union[int, float]

stat

The statistic to return.

It can include any CloudWatch statistic or extended statistic. For a list of valid values, see the table in Statistics in the Amazon CloudWatch User Guide .

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cloudwatch-alarm-metricstat.html#cfn-cloudwatch-alarm-metricstat-stat

Return type

str

unit

The unit to use for the returned data points.

Valid values are: Seconds, Microseconds, Milliseconds, Bytes, Kilobytes, Megabytes, Gigabytes, Terabytes, Bits, Kilobits, Megabits, Gigabits, Terabits, Percent, Count, Bytes/Second, Kilobytes/Second, Megabytes/Second, Gigabytes/Second, Terabytes/Second, Bits/Second, Kilobits/Second, Megabits/Second, Gigabits/Second, Terabits/Second, Count/Second, or None.

Link

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-properties-cloudwatch-alarm-metricstat.html#cfn-cloudwatch-alarm-metricstat-unit

Return type

Optional[str]