FunctionProps

class aws_cdk.aws_lambda.FunctionProps(*, max_event_age=None, on_failure=None, on_success=None, retry_attempts=None, allow_all_outbound=None, allow_public_subnet=None, architecture=None, architectures=None, code_signing_config=None, current_version_options=None, dead_letter_queue=None, dead_letter_queue_enabled=None, dead_letter_topic=None, description=None, environment=None, environment_encryption=None, ephemeral_storage_size=None, events=None, filesystem=None, function_name=None, initial_policy=None, insights_version=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)

Bases: FunctionOptions

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
architecture (Optional[Architecture]) – The system architectures compatible with this lambda function. Default: Architecture.X86_64
architectures (Optional[Sequence[Architecture]]) – (deprecated) DEPRECATED. Default: [Architecture.X86_64]
code_signing_config (Optional[ICodeSigningConfig]) – Code signing config associated with this function. Default: - Not Sign the Code
current_version_options (Union[VersionOptions, Dict[str, Any], None]) – 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. If SNS topic is desired, specify deadLetterTopic property instead. 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.
dead_letter_topic (Optional[ITopic]) – The SNS topic to use as a DLQ. Note that if deadLetterQueueEnabled is set to true, an SQS queue will be created rather than an SNS topic. Using an SNS topic as a DLQ requires this property to be set explicitly. Default: - no SNS topic
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).
ephemeral_storage_size (Optional[Size]) – The size of the function’s /tmp directory in MiB. Default: 512 MiB
events (Optional[Sequence[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[Sequence[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.
insights_version (Optional[LambdaInsightsVersion]) – Specify the version of CloudWatch Lambda insights to use for monitoring. Default: - No Lambda Insights
layers (Optional[Sequence[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 multiple 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 (Union[LogRetentionRetryOptions, Dict[str, Any], None]) – 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[Sequence[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 (Union[SubnetSelection, Dict[str, Any], None]) – 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.

ExampleMetadata:

infused

Example:

import aws_cdk.aws_lambda as lambda_


fn = lambda_.Function(self, "MyFunc",
    runtime=lambda_.Runtime.NODEJS_14_X,
    handler="index.handler",
    code=lambda_.Code.from_inline("exports.handler = handler.toString()")
)

rule = events.Rule(self, "rule",
    event_pattern=events.EventPattern(
        source=["aws.ec2"]
    )
)

queue = sqs.Queue(self, "Queue")

rule.add_target(targets.LambdaFunction(fn,
    dead_letter_queue=queue,  # Optional: add a dead letter queue
    max_event_age=cdk.Duration.hours(2),  # Optional: set the maxEventAge retry policy
    retry_attempts=2
))

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

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

architecture

The system architectures compatible with this lambda function.

Default:: Architecture.X86_64

architectures

(deprecated) DEPRECATED.

Default:: [Architecture.X86_64]
Deprecated:: use architecture
Stability:: deprecated

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.

code_signing_config

Code signing config associated with this function.

Default:

Not Sign the Code

current_version_options

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

Default:

default options as described in VersionOptions

dead_letter_queue

The SQS queue to use if DLQ is enabled.

If SNS topic is desired, specify deadLetterTopic property instead.

Default:

SQS queue with 14 day retention period if deadLetterQueueEnabled is true

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.

dead_letter_topic

The SNS topic to use as a DLQ.

Note that if deadLetterQueueEnabled is set to true, an SQS queue will be created rather than an SNS topic. Using an SNS topic as a DLQ requires this property to be set explicitly.

Default:

no SNS topic

description

A description of the function.

Default:

No description.

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.

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).

ephemeral_storage_size

The size of the function’s /tmp directory in MiB.

Default:: 512 MiB

events

Event sources for this function.

You can also add event sources using addEventSource.

Default:

No event sources.

filesystem

The filesystem configuration for the lambda function.

Default:

will not mount any 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.

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.

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.

insights_version

Specify the version of CloudWatch Lambda insights to use for monitoring.

Default:

No Lambda Insights

See:

https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/Lambda-Insights-Getting-Started-docker.html

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 multiple functions.

Default:

No layers.

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

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.

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.

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)

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

on_failure

The destination for failed invocations.

Default:

no destination

on_success

The destination for successful invocations.

Default:

no destination

profiling

Enable profiling.

Default:

No profiling.

See:

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

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

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

retry_attempts

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

Minimum: 0 Maximum: 2

Default:: 2

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.

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.

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

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.

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)

tracing

Enable AWS X-Ray Tracing for Lambda Function.

Default:: Tracing.Disabled

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.

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