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latestOpenAPI 3.0.0Apache 2.0 License2026-07-1466347371.7 KB

Updates a Lambda function's code. If code signing is enabled for the function, the code package must be signed by a trusted publisher. For more information, see Configuring code signing for Lambda.

If the function's package type is Image, then you must specify the code package in ImageUri as the URI of a container image in the Amazon ECR registry.

If the function's package type is Zip, then you must specify the deployment package as a .zip file archive. Enter the Amazon S3 bucket and key of the code .zip file location. You can also provide the function code inline using the ZipFile field.

The code in the deployment package must be compatible with the target instruction set architecture of the function (x86-64 or arm64).

The function's code is locked when you publish a version. You can't modify the code of a published version, only the unpublished version.

For a function defined as a container image, Lambda resolves the image tag to an image digest. In Amazon ECR, if you update the image tag to a new image, Lambda does not automatically update the function.

put/2015-03-31/functions/{FunctionName}/code

Path parameters

FunctionNamestring required
<p>The name of the Lambda function.</p> <p class="title"> <b>Name formats</b> </p> <ul> <li> <p> <b>Function name</b> – <code>my-function</code>.</p> </li> <li> <p> <b>Function ARN</b> – <code>arn:aws:lambda:us-west-2:123456789012:function:my-function</code>.</p> </li> <li> <p> <b>Partial ARN</b> – <code>123456789012:function:my-function</code>.</p> </li> </ul> <p>The length constraint applies only to the full ARN. If you specify only the function name, it is limited to 64 characters in length.</p>

Request body

ZipFilestring password

The base64-encoded contents of the deployment package. Amazon Web Services SDK and CLI clients handle the encoding for you. Use only with a function defined with a .zip file archive deployment package.

S3Bucketstring

An Amazon S3 bucket in the same Amazon Web Services Region as your function. The bucket can be in a different Amazon Web Services account. Use only with a function defined with a .zip file archive deployment package.

S3Keystring

The Amazon S3 key of the deployment package. Use only with a function defined with a .zip file archive deployment package.

S3ObjectVersionstring

For versioned objects, the version of the deployment package object to use.

ImageUristring

URI of a container image in the Amazon ECR registry. Do not use for a function defined with a .zip file archive.

Publishboolean

Set to true to publish a new version of the function after updating the code. This has the same effect as calling <a>PublishVersion</a> separately.

DryRunboolean

Set to true to validate the request parameters and access permissions without modifying the function code.

RevisionIdstring

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.

ArchitecturesArchitecture[]

The instruction set architecture that the function supports. Enter a string array with one of the valid values (arm64 or x86_64). The default value is <code>x86_64</code>.

Response

Success

FunctionNamestring

The name of the function.

FunctionArnstring

The function's Amazon Resource Name (ARN).

Runtime'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' | 'nodejs4.3-edge' | 'go1.x' | 'ruby2.5' | 'ruby2.7' | 'provided' | 'provided.al2' | 'nodejs18.x' | 'python3.10'
<p>The identifier of the function's <a href="https://docs.aws.amazon.com/lambda/latest/dg/lambda-runtimes.html">runtime</a>. Runtime is required if the deployment package is a .zip file archive.</p> <p>The following list includes deprecated runtimes. For more information, see <a href="https://docs.aws.amazon.com/lambda/latest/dg/lambda-runtimes.html#runtime-support-policy">Runtime deprecation policy</a>.</p>
Rolestring

The function's execution role.

Handlerstring

The function that Lambda calls to begin running your function.

CodeSizeinteger

The size of the function's deployment package, in bytes.

Descriptionstring

The function's description.

Timeoutinteger

The amount of time in seconds that Lambda allows a function to run before stopping it.

MemorySizeinteger

The amount of memory available to the function at runtime.

LastModifiedstring

The date and time that the function was last updated, in <a href="https://www.w3.org/TR/NOTE-datetime">ISO-8601 format</a> (YYYY-MM-DDThh:mm:ss.sTZD).

CodeSha256string

The SHA256 hash of the function's deployment package.

Versionstring

The version of the Lambda function.

KMSKeyArnstring

The KMS key that's used to encrypt the function's <a href="https://docs.aws.amazon.com/lambda/latest/dg/configuration-envvars.html#configuration-envvars-encryption">environment variables</a>. When <a href="https://docs.aws.amazon.com/lambda/latest/dg/snapstart-security.html">Lambda SnapStart</a> is activated, this key is also used to encrypt the function's snapshot. This key is returned only if you've configured a customer managed key.

MasterArnstring

For Lambda@Edge functions, the ARN of the main function.

RevisionIdstring

The latest updated revision of the function or alias.

State'Pending' | 'Active' | 'Inactive' | 'Failed'

The current state of the function. When the state is <code>Inactive</code>, you can reactivate the function by invoking it.

StateReasonstring

The reason for the function's current state.

StateReasonCode'Idle' | 'Creating' | 'Restoring' | 'EniLimitExceeded' | 'InsufficientRolePermissions' | 'InvalidConfiguration' | 'InternalError' | 'SubnetOutOfIPAddresses' | 'InvalidSubnet' | 'InvalidSecurityGroup' | 'ImageDeleted' | 'ImageAccessDenied' | 'InvalidImage' | 'KMSKeyAccessDenied' | 'KMSKeyNotFound' | 'InvalidStateKMSKey' | 'DisabledKMSKey' | 'EFSIOError' | 'EFSMountConnectivityError' | 'EFSMountFailure' | 'EFSMountTimeout' | 'InvalidRuntime' | 'InvalidZipFileException' | 'FunctionError'

The reason code for the function's current state. When the code is <code>Creating</code>, you can't invoke or modify the function.

LastUpdateStatus'Successful' | 'Failed' | 'InProgress'

The status of the last update that was performed on the function. This is first set to <code>Successful</code> after function creation completes.

LastUpdateStatusReasonstring

The reason for the last update that was performed on the function.

LastUpdateStatusReasonCode'EniLimitExceeded' | 'InsufficientRolePermissions' | 'InvalidConfiguration' | 'InternalError' | 'SubnetOutOfIPAddresses' | 'InvalidSubnet' | 'InvalidSecurityGroup' | 'ImageDeleted' | 'ImageAccessDenied' | 'InvalidImage' | 'KMSKeyAccessDenied' | 'KMSKeyNotFound' | 'InvalidStateKMSKey' | 'DisabledKMSKey' | 'EFSIOError' | 'EFSMountConnectivityError' | 'EFSMountFailure' | 'EFSMountTimeout' | 'InvalidRuntime' | 'InvalidZipFileException' | 'FunctionError'

The reason code for the last update that was performed on the function.

PackageType'Zip' | 'Image'

The type of deployment package. Set to <code>Image</code> for container image and set <code>Zip</code> for .zip file archive.

SigningProfileVersionArnstring

The ARN of the signing profile version.

SigningJobArnstring

The ARN of the signing job.

ArchitecturesArchitecture[]

The instruction set architecture that the function supports. Architecture is a string array with one of the valid values. The default architecture value is <code>x86_64</code>.