UpdateFunctionConfiguration

The name or ARN of the Lambda function.

The length constraint applies only to the full ARN. If you specify only the function name, it is limited to 64 characters in length.

Length Constraints: Minimum length of 1. Maximum length of 140.

Pattern: (arn:(aws[a-zA-Z-]*)?:lambda:)?([a-z]{2}((-gov)|(-iso([a-z]?)))?-[a-z]+-\d{1}:)?(\d{12}:)?(function:)?([a-zA-Z0-9-_]+)(:(\$LATEST|[a-zA-Z0-9-_]+))?

Required: Yes

Configuration for the capacity provider that manages compute resources for Lambda functions.

Type: CapacityProviderConfig object

Required: No

A dead-letter queue configuration that specifies the queue or topic where Lambda sends asynchronous events when they fail processing. For more information, see Dead-letter queues.

Type: DeadLetterConfig object

Required: No

A description of the function.

Type: String

Length Constraints: Minimum length of 0. Maximum length of 256.

Required: No

Configuration settings for durable functions, including execution timeout, retention period for execution history, and an optional ARN of the AWS Key Management Service (AWS KMS) customer managed key that is used to encrypt your durable execution's payload data, including input, output, and error payloads.

Type: DurableConfig object

Required: No

Environment variables that are accessible from function code during execution.

Type: Environment object

Required: No

The size of the function's /tmp directory in MB. The default value is 512, but can be any whole number between 512 and 10,240 MB. For more information, see Configuring ephemeral storage (console).

Type: EphemeralStorage object

Required: No

Connection settings for an Amazon EFS file system or an Amazon S3 Files file system.

Type: Array of FileSystemConfig objects

Array Members: Minimum number of 0 items. Maximum number of 1 item.

Required: No

The name of the method within your code that Lambda calls to run your function. Handler is required if the deployment package is a .zip file archive. The format includes the file name. It can also include namespaces and other qualifiers, depending on the runtime. For more information, see Lambda programming model.

Type: String

Length Constraints: Minimum length of 0. Maximum length of 128.

Pattern: [^\s]+

Required: No

Container image configuration values that override the values in the container image Docker file.

Type: ImageConfig object

Required: No

The ARN of the AWS Key Management Service (AWS KMS) customer managed key that's used to encrypt the following resources:

If you don't provide a customer managed key, Lambda uses an AWS owned key or an AWS managed key.

Type: String

Pattern: (arn:(aws[a-zA-Z-]*)?:[a-z0-9-.]+:.*)|()

Required: No

A list of function layers to add to the function's execution environment. Specify each layer by its ARN, including the version.

Type: Array of strings

Length Constraints: Minimum length of 1. Maximum length of 140.

Pattern: arn:[a-zA-Z0-9-]+:lambda:[a-zA-Z0-9-]+:\d{12}:layer:[a-zA-Z0-9-_]+:[0-9]+

Required: No

The function's Amazon CloudWatch Logs configuration settings.

Type: LoggingConfig object

Required: No

The amount of memory available to the function at runtime. Increasing the function memory also increases its CPU allocation. The default value is 128 MB. The value can be any multiple of 1 MB.

Type: Integer

Valid Range: Minimum value of 128. Maximum value of 32768.

Required: No

Update the function only if the revision ID matches the ID that's specified. Use this option to avoid modifying a function that has changed since you last read it.

Type: String

Required: No

The Amazon Resource Name (ARN) of the function's execution role.

Type: String

Pattern: arn:(aws[a-zA-Z-]*)?:iam::\d{12}:role/?[a-zA-Z_0-9+=,.@\-_/]+

Required: No

The identifier of the function's runtime. Runtime is required if the deployment package is a .zip file archive. Specifying a runtime results in an error if you're deploying a function using a container image.

The following list includes deprecated runtimes. Lambda blocks creating new functions and updating existing functions shortly after each runtime is deprecated. For more information, see Runtime use after deprecation.

For a list of all currently supported runtimes, see Supported runtimes.

Type: String

Valid Values: nodejs | nodejs4.3 | nodejs6.10 | nodejs8.10 | nodejs10.x | nodejs12.x | nodejs14.x | nodejs16.x | java8 | java8.al2 | java11 | python2.7 | python3.6 | python3.7 | python3.8 | python3.9 | dotnetcore1.0 | dotnetcore2.0 | dotnetcore2.1 | dotnetcore3.1 | dotnet6 | dotnet8 | nodejs4.3-edge | go1.x | ruby2.5 | ruby2.7 | provided | provided.al2 | nodejs18.x | python3.10 | java17 | ruby3.2 | ruby3.3 | ruby3.4 | python3.11 | nodejs20.x | provided.al2023 | python3.12 | java21 | python3.13 | nodejs22.x | nodejs24.x | python3.14 | java25 | dotnet10 | ruby4.0

Required: No

The function's SnapStart setting.

Type: SnapStart object

Required: No

The amount of time (in seconds) that Lambda allows a function to run before stopping it. The default is 3 seconds, and the maximum allowed value is 900 seconds. For functions using Lambda Managed Instances, asynchronous invocations and event source mapping invocations (except Amazon MQ and Amazon DocumentDB) support a maximum allowed value of 5,400 seconds (90 minutes). For more information, see Lambda execution environment.

Type: Integer

Valid Range: Minimum value of 1.

Required: No

Set Mode to Active to sample and trace a subset of incoming requests with X-Ray.

Type: TracingConfig object

Required: No

For network connectivity to AWS resources in a VPC, specify a list of security groups and subnets in the VPC. When you connect a function to a VPC, it can access resources and the internet only through that VPC. For more information, see Configuring a Lambda function to access resources in a VPC.

Type: VpcConfig object

Required: No