SingletonFunctionProps¶

class aws_cdk.aws_lambda.SingletonFunctionProps(*, max_event_age=None, on_failure=None, on_success=None, retry_attempts=None, allow_all_outbound=None, allow_public_subnet=None, code_signing_config=None, current_version_options=None, dead_letter_queue=None, dead_letter_queue_enabled=None, description=None, environment=None, environment_encryption=None, events=None, filesystem=None, function_name=None, initial_policy=None, layers=None, log_retention=None, log_retention_retry_options=None, log_retention_role=None, memory_size=None, profiling=None, profiling_group=None, reserved_concurrent_executions=None, role=None, security_group=None, security_groups=None, timeout=None, tracing=None, vpc=None, vpc_subnets=None, code, handler, runtime, uuid, lambda_purpose=None)¶

Bases: aws_cdk.aws_lambda.FunctionProps

Properties for a newly created singleton Lambda.

Parameters

max_event_age (Optional[Duration]) – The maximum age of a request that Lambda sends to a function for processing. Minimum: 60 seconds Maximum: 6 hours Default: Duration.hours(6)
on_failure (Optional[IDestination]) – The destination for failed invocations. Default: - no destination
on_success (Optional[IDestination]) – The destination for successful invocations. Default: - no destination
retry_attempts (Union[int, float, None]) – The maximum number of times to retry when the function returns an error. Minimum: 0 Maximum: 2 Default: 2
allow_all_outbound (Optional[bool]) – Whether to allow the Lambda to send all network traffic. If set to false, you must individually add traffic rules to allow the Lambda to connect to network targets. Default: true
allow_public_subnet (Optional[bool]) – Lambda Functions in a public subnet can NOT access the internet. Use this property to acknowledge this limitation and still place the function in a public subnet. Default: false
code_signing_config (Optional[ICodeSigningConfig]) – Code signing config associated with this function. Default: - Not Sign the Code
current_version_options (Optional[VersionOptions]) – Options for the lambda.Version resource automatically created by the fn.currentVersion method. Default: - default options as described in VersionOptions
dead_letter_queue (Optional[IQueue]) – The SQS queue to use if DLQ is enabled. Default: - SQS queue with 14 day retention period if deadLetterQueueEnabled is true
dead_letter_queue_enabled (Optional[bool]) – Enabled DLQ. If deadLetterQueue is undefined, an SQS queue with default options will be defined for your Function. Default: - false unless deadLetterQueue is set, which implies DLQ is enabled.
description (Optional[str]) – A description of the function. Default: - No description.
environment (Optional[Mapping[str, str]]) – Key-value pairs that Lambda caches and makes available for your Lambda functions. Use environment variables to apply configuration changes, such as test and production environment configurations, without changing your Lambda function source code. Default: - No environment variables.
environment_encryption (Optional[IKey]) – The AWS KMS key that’s used to encrypt your function’s environment variables. Default: - AWS Lambda creates and uses an AWS managed customer master key (CMK).
events (Optional[List[IEventSource]]) – Event sources for this function. You can also add event sources using addEventSource. Default: - No event sources.
filesystem (Optional[FileSystem]) – The filesystem configuration for the lambda function. Default: - will not mount any filesystem
function_name (Optional[str]) – A name for the function. Default: - AWS CloudFormation generates a unique physical ID and uses that ID for the function’s name. For more information, see Name Type.
initial_policy (Optional[List[PolicyStatement]]) – Initial policy statements to add to the created Lambda Role. You can call addToRolePolicy to the created lambda to add statements post creation. Default: - No policy statements are added to the created Lambda role.
layers (Optional[List[ILayerVersion]]) – A list of layers to add to the function’s execution environment. You can configure your Lambda function to pull in additional code during initialization in the form of layers. Layers are packages of libraries or other dependencies that can be used by mulitple functions. Default: - No layers.
log_retention (Optional[RetentionDays]) – The number of days log events are kept in CloudWatch Logs. When updating this property, unsetting it doesn’t remove the log retention policy. To remove the retention policy, set the value to INFINITE. Default: logs.RetentionDays.INFINITE
log_retention_retry_options (Optional[LogRetentionRetryOptions]) – When log retention is specified, a custom resource attempts to create the CloudWatch log group. These options control the retry policy when interacting with CloudWatch APIs. Default: - Default AWS SDK retry options.
log_retention_role (Optional[IRole]) – The IAM role for the Lambda function associated with the custom resource that sets the retention policy. Default: - A new role is created.
memory_size (Union[int, float, None]) – The amount of memory, in MB, that is allocated to your Lambda function. Lambda uses this value to proportionally allocate the amount of CPU power. For more information, see Resource Model in the AWS Lambda Developer Guide. Default: 128
profiling (Optional[bool]) – Enable profiling. Default: - No profiling.
profiling_group (Optional[IProfilingGroup]) – Profiling Group. Default: - A new profiling group will be created if profiling is set.
reserved_concurrent_executions (Union[int, float, None]) – The maximum of concurrent executions you want to reserve for the function. Default: - No specific limit - account limit.
role (Optional[IRole]) – Lambda execution role. This is the role that will be assumed by the function upon execution. It controls the permissions that the function will have. The Role must be assumable by the ‘lambda.amazonaws.com’ service principal. The default Role automatically has permissions granted for Lambda execution. If you provide a Role, you must add the relevant AWS managed policies yourself. The relevant managed policies are “service-role/AWSLambdaBasicExecutionRole” and “service-role/AWSLambdaVPCAccessExecutionRole”. Default: - A unique role will be generated for this lambda function. Both supplied and generated roles can always be changed by calling addToRolePolicy.
security_group (Optional[ISecurityGroup]) – (deprecated) What security group to associate with the Lambda’s network interfaces. This property is being deprecated, consider using securityGroups instead. Only used if ‘vpc’ is supplied. Use securityGroups property instead. Function constructor will throw an error if both are specified. Default: - If the function is placed within a VPC and a security group is not specified, either by this or securityGroups prop, a dedicated security group will be created for this function.
security_groups (Optional[List[ISecurityGroup]]) – The list of security groups to associate with the Lambda’s network interfaces. Only used if ‘vpc’ is supplied. Default: - If the function is placed within a VPC and a security group is not specified, either by this or securityGroup prop, a dedicated security group will be created for this function.
timeout (Optional[Duration]) – The function execution time (in seconds) after which Lambda terminates the function. Because the execution time affects cost, set this value based on the function’s expected execution time. Default: Duration.seconds(3)
tracing (Optional[Tracing]) – Enable AWS X-Ray Tracing for Lambda Function. Default: Tracing.Disabled
vpc (Optional[IVpc]) – VPC network to place Lambda network interfaces. Specify this if the Lambda function needs to access resources in a VPC. Default: - Function is not placed within a VPC.
vpc_subnets (Optional[SubnetSelection]) – Where to place the network interfaces within the VPC. Only used if ‘vpc’ is supplied. Note: internet access for Lambdas requires a NAT gateway, so picking Public subnets is not allowed. Default: - the Vpc default strategy if not specified
code (Code) – The source code of your Lambda function. You can point to a file in an Amazon Simple Storage Service (Amazon S3) bucket or specify your source code as inline text.
handler (str) – The name of the method within your code that Lambda calls to execute your function. The format includes the file name. It can also include namespaces and other qualifiers, depending on the runtime. For more information, see https://docs.aws.amazon.com/lambda/latest/dg/gettingstarted-features.html#gettingstarted-features-programmingmodel. Use Handler.FROM_IMAGE when defining a function from a Docker image. NOTE: If you specify your source code as inline text by specifying the ZipFile property within the Code property, specify index.function_name as the handler.
runtime (Runtime) – The runtime environment for the Lambda function that you are uploading. For valid values, see the Runtime property in the AWS Lambda Developer Guide. Use Runtime.FROM_IMAGE when when defining a function from a Docker image.
uuid (str) – A unique identifier to identify this lambda. The identifier should be unique across all custom resource providers. We recommend generating a UUID per provider.
lambda_purpose (Optional[str]) – A descriptive name for the purpose of this Lambda. If the Lambda does not have a physical name, this string will be reflected its generated name. The combination of lambdaPurpose and uuid must be unique. Default: SingletonLambda

Attributes

allow_all_outbound¶

Whether to allow the Lambda to send all network traffic.

If set to false, you must individually add traffic rules to allow the Lambda to connect to network targets.

Default: true
Return type: Optional[bool]

allow_public_subnet¶

Lambda Functions in a public subnet can NOT access the internet.

Use this property to acknowledge this limitation and still place the function in a public subnet.

Default: false
See: https://stackoverflow.com/questions/52992085/why-cant-an-aws-lambda-function-inside-a-public-subnet-in-a-vpc-connect-to-the/52994841#52994841
Return type: Optional[bool]

code¶

The source code of your Lambda function.

You can point to a file in an Amazon Simple Storage Service (Amazon S3) bucket or specify your source code as inline text.

Return type: Code

code_signing_config¶

Code signing config associated with this function.

Default

Not Sign the Code

Return type

Optional[ICodeSigningConfig]

current_version_options¶

Options for the lambda.Version resource automatically created by the fn.currentVersion method.

Default

default options as described in VersionOptions

Return type

Optional[VersionOptions]

dead_letter_queue¶

The SQS queue to use if DLQ is enabled.

Default

SQS queue with 14 day retention period if deadLetterQueueEnabled is true

Return type

Optional[IQueue]

dead_letter_queue_enabled¶

Enabled DLQ.

If deadLetterQueue is undefined, an SQS queue with default options will be defined for your Function.

Default

false unless deadLetterQueue is set, which implies DLQ is enabled.

Return type

Optional[bool]

description¶

A description of the function.

Default

No description.

Return type

Optional[str]

environment¶

Key-value pairs that Lambda caches and makes available for your Lambda functions.

Use environment variables to apply configuration changes, such as test and production environment configurations, without changing your Lambda function source code.

Default

No environment variables.

Return type

Optional[Mapping[str, str]]

environment_encryption¶

The AWS KMS key that’s used to encrypt your function’s environment variables.

Default

AWS Lambda creates and uses an AWS managed customer master key (CMK).

Return type

Optional[IKey]

events¶

Event sources for this function.

You can also add event sources using addEventSource.

Default

No event sources.

Return type

Optional[List[IEventSource]]

filesystem¶

The filesystem configuration for the lambda function.

Default

will not mount any filesystem

Return type

Optional[FileSystem]

function_name¶

A name for the function.

Default

AWS CloudFormation generates a unique physical ID and uses that

ID for the function’s name. For more information, see Name Type.

Return type: Optional[str]

handler¶

The name of the method within your code that Lambda calls to execute your function.

The format includes the file name. It can also include namespaces and other qualifiers, depending on the runtime. For more information, see https://docs.aws.amazon.com/lambda/latest/dg/gettingstarted-features.html#gettingstarted-features-programmingmodel.

Use Handler.FROM_IMAGE when defining a function from a Docker image.

NOTE: If you specify your source code as inline text by specifying the ZipFile property within the Code property, specify index.function_name as the handler.

Return type: str

initial_policy¶

Initial policy statements to add to the created Lambda Role.

You can call addToRolePolicy to the created lambda to add statements post creation.

Default

No policy statements are added to the created Lambda role.

Return type

Optional[List[PolicyStatement]]

lambda_purpose¶

A descriptive name for the purpose of this Lambda.

If the Lambda does not have a physical name, this string will be reflected its generated name. The combination of lambdaPurpose and uuid must be unique.

Default: SingletonLambda
Return type: Optional[str]

layers¶

A list of layers to add to the function’s execution environment.

You can configure your Lambda function to pull in additional code during initialization in the form of layers. Layers are packages of libraries or other dependencies that can be used by mulitple functions.

Default

No layers.

Return type

Optional[List[ILayerVersion]]

log_retention¶

The number of days log events are kept in CloudWatch Logs.

When updating this property, unsetting it doesn’t remove the log retention policy. To remove the retention policy, set the value to INFINITE.

Default: logs.RetentionDays.INFINITE
Return type: Optional[RetentionDays]

log_retention_retry_options¶

When log retention is specified, a custom resource attempts to create the CloudWatch log group.

These options control the retry policy when interacting with CloudWatch APIs.

Default

Default AWS SDK retry options.

Return type

Optional[LogRetentionRetryOptions]

log_retention_role¶

The IAM role for the Lambda function associated with the custom resource that sets the retention policy.

Default

A new role is created.

Return type

Optional[IRole]

max_event_age¶

The maximum age of a request that Lambda sends to a function for processing.

Minimum: 60 seconds Maximum: 6 hours

Default: Duration.hours(6)
Return type: Optional[Duration]

memory_size¶

The amount of memory, in MB, that is allocated to your Lambda function.

Lambda uses this value to proportionally allocate the amount of CPU power. For more information, see Resource Model in the AWS Lambda Developer Guide.

Default: 128
Return type: Union[int, float, None]

on_failure¶

The destination for failed invocations.

Default

no destination

Return type

Optional[IDestination]

on_success¶

The destination for successful invocations.

Default

no destination

Return type

Optional[IDestination]

profiling¶

Enable profiling.

Default

No profiling.

See

https://docs.aws.amazon.com/codeguru/latest/profiler-ug/setting-up-lambda.html

Return type

Optional[bool]

profiling_group¶

Profiling Group.

Default

A new profiling group will be created if profiling is set.

See

https://docs.aws.amazon.com/codeguru/latest/profiler-ug/setting-up-lambda.html

Return type

Optional[IProfilingGroup]

reserved_concurrent_executions¶

The maximum of concurrent executions you want to reserve for the function.

Default

No specific limit - account limit.

See

https://docs.aws.amazon.com/lambda/latest/dg/concurrent-executions.html

Return type

Union[int, float, None]

retry_attempts¶

The maximum number of times to retry when the function returns an error.

Minimum: 0 Maximum: 2

Default: 2
Return type: Union[int, float, None]

role¶

Lambda execution role.

This is the role that will be assumed by the function upon execution. It controls the permissions that the function will have. The Role must be assumable by the ‘lambda.amazonaws.com’ service principal.

The default Role automatically has permissions granted for Lambda execution. If you provide a Role, you must add the relevant AWS managed policies yourself.

The relevant managed policies are “service-role/AWSLambdaBasicExecutionRole” and “service-role/AWSLambdaVPCAccessExecutionRole”.

Default

A unique role will be generated for this lambda function.

Both supplied and generated roles can always be changed by calling addToRolePolicy.

Return type: Optional[IRole]

runtime¶

The runtime environment for the Lambda function that you are uploading.

For valid values, see the Runtime property in the AWS Lambda Developer Guide.

Use Runtime.FROM_IMAGE when when defining a function from a Docker image.

Return type: Runtime

security_group¶

(deprecated) What security group to associate with the Lambda’s network interfaces. This property is being deprecated, consider using securityGroups instead.

Only used if ‘vpc’ is supplied.

Use securityGroups property instead. Function constructor will throw an error if both are specified.

Default

If the function is placed within a VPC and a security group is

not specified, either by this or securityGroups prop, a dedicated security group will be created for this function.

Deprecated

This property is deprecated, use securityGroups instead

Stability

deprecated

Return type

Optional[ISecurityGroup]

security_groups¶

The list of security groups to associate with the Lambda’s network interfaces.

Only used if ‘vpc’ is supplied.

Default

If the function is placed within a VPC and a security group is

not specified, either by this or securityGroup prop, a dedicated security group will be created for this function.

Return type: Optional[List[ISecurityGroup]]

timeout¶

The function execution time (in seconds) after which Lambda terminates the function.

Because the execution time affects cost, set this value based on the function’s expected execution time.

Default: Duration.seconds(3)
Return type: Optional[Duration]

tracing¶

Enable AWS X-Ray Tracing for Lambda Function.

Default: Tracing.Disabled
Return type: Optional[Tracing]

uuid¶

A unique identifier to identify this lambda.

The identifier should be unique across all custom resource providers. We recommend generating a UUID per provider.

Return type: str

vpc¶

VPC network to place Lambda network interfaces.

Specify this if the Lambda function needs to access resources in a VPC.

Default

Function is not placed within a VPC.

Return type

Optional[IVpc]

vpc_subnets¶

Where to place the network interfaces within the VPC.

Only used if ‘vpc’ is supplied. Note: internet access for Lambdas requires a NAT gateway, so picking Public subnets is not allowed.

Default

the Vpc default strategy if not specified

Return type

Optional[SubnetSelection]