CfnAlarm

class aws_cdk.aws_lightsail.CfnAlarm(scope, id, *, alarm_name, comparison_operator, evaluation_periods, metric_name, monitored_resource_name, threshold, contact_protocols=None, datapoints_to_alarm=None, notification_enabled=None, notification_triggers=None, treat_missing_data=None)

Bases: CfnResource

The AWS::Lightsail::Alarm resource specifies an alarm that can be used to monitor a single metric for one of your Lightsail resources.

See:: http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-resource-lightsail-alarm.html
CloudformationResource:: AWS::Lightsail::Alarm
ExampleMetadata:: fixture=_generated

Example:

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

cfn_alarm = lightsail.CfnAlarm(self, "MyCfnAlarm",
    alarm_name="alarmName",
    comparison_operator="comparisonOperator",
    evaluation_periods=123,
    metric_name="metricName",
    monitored_resource_name="monitoredResourceName",
    threshold=123,

    # the properties below are optional
    contact_protocols=["contactProtocols"],
    datapoints_to_alarm=123,
    notification_enabled=False,
    notification_triggers=["notificationTriggers"],
    treat_missing_data="treatMissingData"
)

Parameters:

scope (Construct) – Scope in which this resource is defined.
id (str) – Construct identifier for this resource (unique in its scope).
alarm_name (str) – The name of the alarm.
comparison_operator (str) – The arithmetic operation to use when comparing the specified statistic and threshold.
evaluation_periods (Union[int, float]) – The number of periods over which data is compared to the specified threshold.
metric_name (str) – The name of the metric associated with the alarm.
monitored_resource_name (str) – The name of the Lightsail resource that the alarm monitors.
threshold (Union[int, float]) – The value against which the specified statistic is compared.
contact_protocols (Optional[Sequence[str]]) – The contact protocols for the alarm, such as Email , SMS (text messaging), or both. Allowed Values : Email | SMS
datapoints_to_alarm (Union[int, float, None]) – The number of data points within the evaluation periods that must be breaching to cause the alarm to go to the ALARM state.
notification_enabled (Union[bool, IResolvable, None]) – A Boolean value indicating whether the alarm is enabled.
notification_triggers (Optional[Sequence[str]]) – The alarm states that trigger a notification. .. epigraph:: To specify the OK and INSUFFICIENT_DATA values, you must also specify ContactProtocols values. Otherwise, the OK and INSUFFICIENT_DATA values will not take effect and the stack will drift. Allowed Values : OK | ALARM | INSUFFICIENT_DATA
treat_missing_data (Optional[str]) – Specifies how the alarm handles missing data points. An alarm can treat missing data in the following ways: - breaching - Assumes the missing data is not within the threshold. Missing data counts towards the number of times that the metric is not within the threshold. - notBreaching - Assumes the missing data is within the threshold. Missing data does not count towards the number of times that the metric is not within the threshold. - ignore - Ignores the missing data. Maintains the current alarm state. - missing - Missing data is treated as missing.

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_dependency(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_depends_on(target)

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

Parameters:

target (CfnResource) –

Deprecated:

use addDependency

Stability:

deprecated

Return type:

None

add_metadata(key, value)

Add a value to the CloudFormation Resource Metadata.

Parameters:

key (str) –
value (Any) –

See:

Return type:

None

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.

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 intermediate 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). In some cases, a snapshot can be taken of the resource prior to deletion (RemovalPolicy.SNAPSHOT). A list of resources that support this policy can be found in the following link:

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 resource, please consult that specific resource’s documentation.

See:

https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/aws-attribute-deletionpolicy.html#aws-attribute-deletionpolicy-options

Return type:

None

get_att(attribute_name, type_hint=None)

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.
type_hint (Optional[ResolutionTypeHint]) –

Return type:

Reference

get_metadata(key)

Retrieve a value value from the CloudFormation Resource Metadata.

Parameters:

key (str) –

See:

Return type:

Any

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.

inspect(inspector)

Examines the CloudFormation resource and discloses attributes.

Parameters:: inspector (TreeInspector) – tree inspector to collect and process attributes.
Return type:: None

obtain_dependencies()

Retrieves an array of resources this resource depends on.

This assembles dependencies on resources across stacks (including nested stacks) automatically.

Return type:: List[Union[Stack, CfnResource]]

obtain_resource_dependencies()

Get a shallow copy of dependencies between this resource and other resources in the same stack.

Return type:: List[CfnResource]

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

remove_dependency(target)

Indicates that this resource no longer depends on another resource.

This can be used for resources across stacks (including nested stacks) and the dependency will automatically be removed from the relevant scope.

Parameters:

target (CfnResource) –

Return type:

None

replace_dependency(target, new_target)

Replaces one dependency with another.

Parameters:

target (CfnResource) – The dependency to replace.
new_target (CfnResource) – The new dependency to add.

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::Lightsail::Alarm'

alarm_name: The name of the alarm.

attr_alarm_arn

The Amazon Resource Name (ARN) of the alarm.

CloudformationAttribute:: AlarmArn

attr_state

The current state of the alarm.

An alarm has the following possible states:

ALARM - The metric is outside of the defined threshold.
INSUFFICIENT_DATA - The alarm has recently started, the metric is not available, or not enough data is available for the metric to determine the alarm state.
OK - The metric is within the defined threshold.

CloudformationAttribute:: State

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

cfn_resource_type: AWS resource type.

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

contact_protocols: The contact protocols for the alarm, such as Email , SMS (text messaging), or both.

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.

datapoints_to_alarm: The number of data points within the evaluation periods that must be breaching to cause the alarm to go to the ALARM state.

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

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).

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.

monitored_resource_name: The name of the Lightsail resource that the alarm monitors.

node: The tree node.

notification_enabled: A Boolean value indicating whether the alarm is enabled.

notification_triggers: The alarm states that trigger a notification.

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 }).

stack

The stack in which this element is defined.

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

threshold: The value against which the specified statistic is compared.

treat_missing_data: Specifies how the alarm handles missing data points.

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(x)

Check whether the given object is a CfnResource.

Parameters:

x (Any) –

Return type:

bool

classmethod is_construct(x)

Checks if x is a construct.

Use this method instead of instanceof to properly detect Construct instances, even when the construct library is symlinked.

Explanation: in JavaScript, multiple copies of the constructs library on disk are seen as independent, completely different libraries. As a consequence, the class Construct in each copy of the constructs library is seen as a different class, and an instance of one class will not test as instanceof the other class. npm install will not create installations like this, but users may manually symlink construct libraries together or use a monorepo tool: in those cases, multiple copies of the constructs library can be accidentally installed, and instanceof will behave unpredictably. It is safest to avoid using instanceof, and using this type-testing method instead.

Parameters:: x (Any) – Any object.
Return type:: bool
Returns:: true if x is an object created from a class which extends Construct.