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User Guide

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[ aws . lambda ]



Updates the code for the specified Lambda function. This operation must only be used on an existing Lambda function and cannot be used to update the function configuration.

If you are using the versioning feature, note this API will always update the $LATEST version of your Lambda function. For information about the versioning feature, see AWS Lambda Function Versioning and Aliases .

This operation requires permission for the lambda:UpdateFunctionCode action.

See also: AWS API Documentation


--function-name <value>
[--zip-file <value>]
[--s3-bucket <value>]
[--s3-key <value>]
[--s3-object-version <value>]
[--publish | --no-publish]
[--cli-input-json <value>]
[--generate-cli-skeleton <value>]


--function-name (string)

The existing Lambda function name whose code you want to replace.

You can specify a function name (for example, Thumbnail ) or you can specify Amazon Resource Name (ARN) of the function (for example, arn:aws:lambda:us-west-2:account-id:function:ThumbNail ). AWS Lambda also allows you to specify a partial ARN (for example, account-id:Thumbnail ). Note that the length constraint applies only to the ARN. If you specify only the function name, it is limited to 64 character in length.

--zip-file (blob)

The path to the zip file of the code you are uploading. Example: fileb://

--s3-bucket (string)

Amazon S3 bucket name where the .zip file containing your deployment package is stored. This bucket must reside in the same AWS Region where you are creating the Lambda function.

--s3-key (string)

The Amazon S3 object (the deployment package) key name you want to upload.

--s3-object-version (string)

The Amazon S3 object (the deployment package) version you want to upload.

--publish | --no-publish (boolean)

This boolean parameter can be used to request AWS Lambda to update the Lambda function and publish a version as an atomic operation.

--cli-input-json (string) Performs service operation based on the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, the CLI values will override the JSON-provided values.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command.


FunctionName -> (string)

The name of the function.

FunctionArn -> (string)

The Amazon Resource Name (ARN) assigned to the function.

Runtime -> (string)

The runtime environment for the Lambda function.

To use the Node.js runtime v4.3, set the value to "nodejs4.3". To use earlier runtime (v0.10.42), set the value to "nodejs".

Role -> (string)

The Amazon Resource Name (ARN) of the IAM role that Lambda assumes when it executes your function to access any other Amazon Web Services (AWS) resources.

Handler -> (string)

The function Lambda calls to begin executing your function.

CodeSize -> (long)

The size, in bytes, of the function .zip file you uploaded.

Description -> (string)

The user-provided description.

Timeout -> (integer)

The function execution time at which Lambda should terminate the function. Because the execution time has cost implications, we recommend you set this value based on your expected execution time. The default is 3 seconds.

MemorySize -> (integer)

The memory size, in MB, you configured for the function. Must be a multiple of 64 MB.

LastModified -> (string)

The time stamp of the last time you updated the function.

CodeSha256 -> (string)

It is the SHA256 hash of your function deployment package.

Version -> (string)

The version of the Lambda function.

VpcConfig -> (structure)

VPC configuration associated with your Lambda function.

SubnetIds -> (list)

A list of subnet IDs associated with the Lambda function.


SecurityGroupIds -> (list)

A list of security group IDs associated with the Lambda function.


VpcId -> (string)

The VPC ID associated with you Lambda function.

DeadLetterConfig -> (structure)

The parent object that contains the target Amazon Resource Name (ARN) of an Amazon SQS queue or Amazon SNS topic.

TargetArn -> (string)

The Amazon Resource Name (ARN) of an Amazon SQS queue or Amazon SNS topic you specify as your Dead Letter Queue (DLQ).

Environment -> (structure)

The parent object that contains your environment's configuration settings.

Variables -> (map)

The key-value pairs returned that represent your environment's configuration settings or error information.

key -> (string)

value -> (string)

Error -> (structure)

The parent object that contains error information associated with your configuration settings.

ErrorCode -> (string)

The error code returned by the environment error object.

Message -> (string)

The message returned by the environment error object.

KMSKeyArn -> (string)

The Amazon Resource Name (ARN) of the KMS key used to encrypt your function's environment variables. If empty, it means you are using the AWS Lambda default service key.