# UpdateFunctionConfiguration


Modify the version-specific settings of a Lambda function.

When you update a function, Lambda provisions an instance of the function and its supporting resources. If your function connects to a VPC, this process can take a minute. During this time, you can't modify the function, but you can still invoke it. The `LastUpdateStatus`, `LastUpdateStatusReason`, and `LastUpdateStatusReasonCode` fields in the response from [GetFunctionConfiguration](API_GetFunctionConfiguration.md) indicate when the update is complete and the function is processing events with the new configuration. For more information, see [Lambda function states](https://docs.aws.amazon.com/lambda/latest/dg/functions-states.html).

These settings can vary between versions of a function and are locked when you publish a version. You can't modify the configuration of a published version, only the unpublished version.

To configure function concurrency, use [PutFunctionConcurrency](API_PutFunctionConcurrency.md). To grant invoke permissions to an AWS account or AWS service, use [AddPermission](API_AddPermission.md).

## Request Syntax


```
PUT /2015-03-31/functions/FunctionName/configuration HTTP/1.1
Content-type: application/json

{
   "CapacityProviderConfig": { 
      "LambdaManagedInstancesCapacityProviderConfig": { 
         "CapacityProviderArn": "string",
         "ExecutionEnvironmentMemoryGiBPerVCpu": number,
         "PerExecutionEnvironmentMaxConcurrency": number
      }
   },
   "DeadLetterConfig": { 
      "TargetArn": "string"
   },
   "Description": "string",
   "DurableConfig": { 
      "ExecutionTimeout": number,
      "RetentionPeriodInDays": number
   },
   "Environment": { 
      "Variables": { 
         "string" : "string" 
      }
   },
   "EphemeralStorage": { 
      "Size": number
   },
   "FileSystemConfigs": [ 
      { 
         "Arn": "string",
         "LocalMountPath": "string"
      }
   ],
   "Handler": "string",
   "ImageConfig": { 
      "Command": [ "string" ],
      "EntryPoint": [ "string" ],
      "WorkingDirectory": "string"
   },
   "KMSKeyArn": "string",
   "Layers": [ "string" ],
   "LoggingConfig": { 
      "ApplicationLogLevel": "string",
      "LogFormat": "string",
      "LogGroup": "string",
      "SystemLogLevel": "string"
   },
   "MemorySize": number,
   "RevisionId": "string",
   "Role": "string",
   "Runtime": "string",
   "SnapStart": { 
      "ApplyOn": "string"
   },
   "Timeout": number,
   "TracingConfig": { 
      "Mode": "string"
   },
   "VpcConfig": { 
      "Ipv6AllowedForDualStack": boolean,
      "SecurityGroupIds": [ "string" ],
      "SubnetIds": [ "string" ]
   }
}
```

## URI Request Parameters


The request uses the following URI parameters.

 ** [FunctionName](#API_UpdateFunctionConfiguration_RequestSyntax) **   <a name="lambda-UpdateFunctionConfiguration-request-uri-FunctionName"></a>
The name or ARN of the Lambda function.  

**Name formats**
+  **Function name** – `my-function`.
+  **Function ARN** – `arn:aws:lambda:us-west-2:123456789012:function:my-function`.
+  **Partial ARN** – `123456789012:function:my-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

## Request Body


The request accepts the following data in JSON format.

 ** [CapacityProviderConfig](#API_UpdateFunctionConfiguration_RequestSyntax) **   <a name="lambda-UpdateFunctionConfiguration-request-CapacityProviderConfig"></a>
Configuration for the capacity provider that manages compute resources for Lambda functions.  
Type: [CapacityProviderConfig](API_CapacityProviderConfig.md) object  
Required: No

 ** [DeadLetterConfig](#API_UpdateFunctionConfiguration_RequestSyntax) **   <a name="lambda-UpdateFunctionConfiguration-request-DeadLetterConfig"></a>
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](https://docs.aws.amazon.com/lambda/latest/dg/invocation-async.html#invocation-dlq).  
Type: [DeadLetterConfig](API_DeadLetterConfig.md) object  
Required: No

 ** [Description](#API_UpdateFunctionConfiguration_RequestSyntax) **   <a name="lambda-UpdateFunctionConfiguration-request-Description"></a>
A description of the function.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 256.  
Required: No

 ** [DurableConfig](#API_UpdateFunctionConfiguration_RequestSyntax) **   <a name="lambda-UpdateFunctionConfiguration-request-DurableConfig"></a>
Configuration settings for durable functions. Allows updating execution timeout and retention period for functions with durability enabled.  
Type: [DurableConfig](API_DurableConfig.md) object  
Required: No

 ** [Environment](#API_UpdateFunctionConfiguration_RequestSyntax) **   <a name="lambda-UpdateFunctionConfiguration-request-Environment"></a>
Environment variables that are accessible from function code during execution.  
Type: [Environment](API_Environment.md) object  
Required: No

 ** [EphemeralStorage](#API_UpdateFunctionConfiguration_RequestSyntax) **   <a name="lambda-UpdateFunctionConfiguration-request-EphemeralStorage"></a>
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)](https://docs.aws.amazon.com/lambda/latest/dg/configuration-function-common.html#configuration-ephemeral-storage).  
Type: [EphemeralStorage](API_EphemeralStorage.md) object  
Required: No

 ** [FileSystemConfigs](#API_UpdateFunctionConfiguration_RequestSyntax) **   <a name="lambda-UpdateFunctionConfiguration-request-FileSystemConfigs"></a>
Connection settings for an Amazon EFS file system or an Amazon S3 Files file system.  
Type: Array of [FileSystemConfig](API_FileSystemConfig.md) objects  
Array Members: Minimum number of 0 items. Maximum number of 1 item.  
Required: No

 ** [Handler](#API_UpdateFunctionConfiguration_RequestSyntax) **   <a name="lambda-UpdateFunctionConfiguration-request-Handler"></a>
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](https://docs.aws.amazon.com/lambda/latest/dg/foundation-progmodel.html).  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 128.  
Pattern: `[^\s]+`   
Required: No

 ** [ImageConfig](#API_UpdateFunctionConfiguration_RequestSyntax) **   <a name="lambda-UpdateFunctionConfiguration-request-ImageConfig"></a>
 [Container image configuration values](https://docs.aws.amazon.com/lambda/latest/dg/images-create.html#images-parms) that override the values in the container image Docker file.  
Type: [ImageConfig](API_ImageConfig.md) object  
Required: No

 ** [KMSKeyArn](#API_UpdateFunctionConfiguration_RequestSyntax) **   <a name="lambda-UpdateFunctionConfiguration-request-KMSKeyArn"></a>
The ARN of the AWS Key Management Service (AWS KMS) customer managed key that's used to encrypt the following resources:  
+ The function's [environment variables](https://docs.aws.amazon.com/lambda/latest/dg/configuration-envvars.html#configuration-envvars-encryption).
+ The function's [Lambda SnapStart](https://docs.aws.amazon.com/lambda/latest/dg/snapstart-security.html) snapshots.
+ When used with `SourceKMSKeyArn`, the unzipped version of the .zip deployment package that's used for function invocations. For more information, see [ Specifying a customer managed key for Lambda](https://docs.aws.amazon.com/lambda/latest/dg/encrypt-zip-package.html#enable-zip-custom-encryption).
+ The optimized version of the container image that's used for function invocations. Note that this is not the same key that's used to protect your container image in the Amazon Elastic Container Registry (Amazon ECR). For more information, see [Function lifecycle](https://docs.aws.amazon.com/lambda/latest/dg/images-create.html#images-lifecycle).
If you don't provide a customer managed key, Lambda uses an [AWS owned key](https://docs.aws.amazon.com/kms/latest/developerguide/concepts.html#aws-owned-cmk) or an [AWS managed key](https://docs.aws.amazon.com/kms/latest/developerguide/concepts.html#aws-managed-cmk).  
Type: String  
Pattern: `(arn:(aws[a-zA-Z-]*)?:[a-z0-9-.]+:.*)|()`   
Required: No

 ** [Layers](#API_UpdateFunctionConfiguration_RequestSyntax) **   <a name="lambda-UpdateFunctionConfiguration-request-Layers"></a>
A list of [function layers](https://docs.aws.amazon.com/lambda/latest/dg/configuration-layers.html) 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

 ** [LoggingConfig](#API_UpdateFunctionConfiguration_RequestSyntax) **   <a name="lambda-UpdateFunctionConfiguration-request-LoggingConfig"></a>
The function's Amazon CloudWatch Logs configuration settings.  
Type: [LoggingConfig](API_LoggingConfig.md) object  
Required: No

 ** [MemorySize](#API_UpdateFunctionConfiguration_RequestSyntax) **   <a name="lambda-UpdateFunctionConfiguration-request-MemorySize"></a>
The amount of [memory available to the function](https://docs.aws.amazon.com/lambda/latest/dg/configuration-function-common.html#configuration-memory-console) 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

 ** [RevisionId](#API_UpdateFunctionConfiguration_RequestSyntax) **   <a name="lambda-UpdateFunctionConfiguration-request-RevisionId"></a>
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

 ** [Role](#API_UpdateFunctionConfiguration_RequestSyntax) **   <a name="lambda-UpdateFunctionConfiguration-request-Role"></a>
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

 ** [Runtime](#API_UpdateFunctionConfiguration_RequestSyntax) **   <a name="lambda-UpdateFunctionConfiguration-request-Runtime"></a>
The identifier of the function's [ runtime](https://docs.aws.amazon.com/lambda/latest/dg/lambda-runtimes.html). 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](https://docs.aws.amazon.com/lambda/latest/dg/lambda-runtimes.html#runtime-deprecation-levels).  
For a list of all currently supported runtimes, see [Supported runtimes](https://docs.aws.amazon.com/lambda/latest/dg/lambda-runtimes.html#runtimes-supported).  
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`   
Required: No

 ** [SnapStart](#API_UpdateFunctionConfiguration_RequestSyntax) **   <a name="lambda-UpdateFunctionConfiguration-request-SnapStart"></a>
The function's [SnapStart](https://docs.aws.amazon.com/lambda/latest/dg/snapstart.html) setting.  
Type: [SnapStart](API_SnapStart.md) object  
Required: No

 ** [Timeout](#API_UpdateFunctionConfiguration_RequestSyntax) **   <a name="lambda-UpdateFunctionConfiguration-request-Timeout"></a>
The amount of time (in seconds) that Lambda allows a function to run before stopping it. The default is 3 seconds. The maximum allowed value is 900 seconds. For more information, see [Lambda execution environment](https://docs.aws.amazon.com/lambda/latest/dg/runtimes-context.html).  
Type: Integer  
Valid Range: Minimum value of 1.  
Required: No

 ** [TracingConfig](#API_UpdateFunctionConfiguration_RequestSyntax) **   <a name="lambda-UpdateFunctionConfiguration-request-TracingConfig"></a>
Set `Mode` to `Active` to sample and trace a subset of incoming requests with [X-Ray](https://docs.aws.amazon.com/lambda/latest/dg/services-xray.html).  
Type: [TracingConfig](API_TracingConfig.md) object  
Required: No

 ** [VpcConfig](#API_UpdateFunctionConfiguration_RequestSyntax) **   <a name="lambda-UpdateFunctionConfiguration-request-VpcConfig"></a>
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](https://docs.aws.amazon.com/lambda/latest/dg/configuration-vpc.html).  
Type: [VpcConfig](API_VpcConfig.md) object  
Required: No

## Response Syntax


```
HTTP/1.1 200
Content-type: application/json

{
   "Architectures": [ "string" ],
   "CapacityProviderConfig": { 
      "LambdaManagedInstancesCapacityProviderConfig": { 
         "CapacityProviderArn": "string",
         "ExecutionEnvironmentMemoryGiBPerVCpu": number,
         "PerExecutionEnvironmentMaxConcurrency": number
      }
   },
   "CodeSha256": "string",
   "CodeSize": number,
   "ConfigSha256": "string",
   "DeadLetterConfig": { 
      "TargetArn": "string"
   },
   "Description": "string",
   "DurableConfig": { 
      "ExecutionTimeout": number,
      "RetentionPeriodInDays": number
   },
   "Environment": { 
      "Error": { 
         "ErrorCode": "string",
         "Message": "string"
      },
      "Variables": { 
         "string" : "string" 
      }
   },
   "EphemeralStorage": { 
      "Size": number
   },
   "FileSystemConfigs": [ 
      { 
         "Arn": "string",
         "LocalMountPath": "string"
      }
   ],
   "FunctionArn": "string",
   "FunctionName": "string",
   "Handler": "string",
   "ImageConfigResponse": { 
      "Error": { 
         "ErrorCode": "string",
         "Message": "string"
      },
      "ImageConfig": { 
         "Command": [ "string" ],
         "EntryPoint": [ "string" ],
         "WorkingDirectory": "string"
      }
   },
   "KMSKeyArn": "string",
   "LastModified": "string",
   "LastUpdateStatus": "string",
   "LastUpdateStatusReason": "string",
   "LastUpdateStatusReasonCode": "string",
   "Layers": [ 
      { 
         "Arn": "string",
         "CodeSize": number,
         "SigningJobArn": "string",
         "SigningProfileVersionArn": "string"
      }
   ],
   "LoggingConfig": { 
      "ApplicationLogLevel": "string",
      "LogFormat": "string",
      "LogGroup": "string",
      "SystemLogLevel": "string"
   },
   "MasterArn": "string",
   "MemorySize": number,
   "PackageType": "string",
   "RevisionId": "string",
   "Role": "string",
   "Runtime": "string",
   "RuntimeVersionConfig": { 
      "Error": { 
         "ErrorCode": "string",
         "Message": "string"
      },
      "RuntimeVersionArn": "string"
   },
   "SigningJobArn": "string",
   "SigningProfileVersionArn": "string",
   "SnapStart": { 
      "ApplyOn": "string",
      "OptimizationStatus": "string"
   },
   "State": "string",
   "StateReason": "string",
   "StateReasonCode": "string",
   "TenancyConfig": { 
      "TenantIsolationMode": "string"
   },
   "Timeout": number,
   "TracingConfig": { 
      "Mode": "string"
   },
   "Version": "string",
   "VpcConfig": { 
      "Ipv6AllowedForDualStack": boolean,
      "SecurityGroupIds": [ "string" ],
      "SubnetIds": [ "string" ],
      "VpcId": "string"
   }
}
```

## Response Elements


If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.

 ** [Architectures](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-Architectures"></a>
The instruction set architecture that the function supports. Architecture is a string array with one of the valid values. The default architecture value is `x86_64`.  
Type: Array of strings  
Array Members: Fixed number of 1 item.  
Valid Values: `x86_64 | arm64` 

 ** [CapacityProviderConfig](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-CapacityProviderConfig"></a>
Configuration for the capacity provider that manages compute resources for Lambda functions.  
Type: [CapacityProviderConfig](API_CapacityProviderConfig.md) object

 ** [CodeSha256](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-CodeSha256"></a>
The SHA256 hash of the function's deployment package.  
Type: String

 ** [CodeSize](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-CodeSize"></a>
The size of the function's deployment package, in bytes.  
Type: Long

 ** [ConfigSha256](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-ConfigSha256"></a>
The SHA256 hash of the function configuration.  
Type: String

 ** [DeadLetterConfig](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-DeadLetterConfig"></a>
The function's dead letter queue.  
Type: [DeadLetterConfig](API_DeadLetterConfig.md) object

 ** [Description](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-Description"></a>
The function's description.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 256.

 ** [DurableConfig](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-DurableConfig"></a>
The function's durable execution configuration settings, if the function is configured for durability.  
Type: [DurableConfig](API_DurableConfig.md) object

 ** [Environment](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-Environment"></a>
The function's [environment variables](https://docs.aws.amazon.com/lambda/latest/dg/configuration-envvars.html). Omitted from AWS CloudTrail logs.  
Type: [EnvironmentResponse](API_EnvironmentResponse.md) object

 ** [EphemeralStorage](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-EphemeralStorage"></a>
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)](https://docs.aws.amazon.com/lambda/latest/dg/configuration-function-common.html#configuration-ephemeral-storage).  
Type: [EphemeralStorage](API_EphemeralStorage.md) object

 ** [FileSystemConfigs](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-FileSystemConfigs"></a>
Connection settings for an [Amazon EFS file system](https://docs.aws.amazon.com/lambda/latest/dg/configuration-filesystem.html) or an [Amazon S3 Files file system](https://docs.aws.amazon.com/lambda/latest/dg/configuration-filesystem.html).  
Type: Array of [FileSystemConfig](API_FileSystemConfig.md) objects  
Array Members: Minimum number of 0 items. Maximum number of 1 item.

 ** [FunctionArn](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-FunctionArn"></a>
The function's Amazon Resource Name (ARN).  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 10000.  
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(\.PUBLISHED)?|[a-zA-Z0-9-_]+))?` 

 ** [FunctionName](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-FunctionName"></a>
The name of the function.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 256.  
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(\.PUBLISHED)?|[a-zA-Z0-9-_]+))?` 

 ** [Handler](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-Handler"></a>
The function that Lambda calls to begin running your function.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 128.  
Pattern: `[^\s]+` 

 ** [ImageConfigResponse](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-ImageConfigResponse"></a>
The function's image configuration values.  
Type: [ImageConfigResponse](API_ImageConfigResponse.md) object

 ** [KMSKeyArn](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-KMSKeyArn"></a>
The ARN of the AWS Key Management Service (AWS KMS) customer managed key that's used to encrypt the following resources:  
+ The function's [environment variables](https://docs.aws.amazon.com/lambda/latest/dg/configuration-envvars.html#configuration-envvars-encryption).
+ The function's [Lambda SnapStart](https://docs.aws.amazon.com/lambda/latest/dg/snapstart-security.html) snapshots.
+ When used with `SourceKMSKeyArn`, the unzipped version of the .zip deployment package that's used for function invocations. For more information, see [ Specifying a customer managed key for Lambda](https://docs.aws.amazon.com/lambda/latest/dg/encrypt-zip-package.html#enable-zip-custom-encryption).
+ The optimized version of the container image that's used for function invocations. Note that this is not the same key that's used to protect your container image in the Amazon Elastic Container Registry (Amazon ECR). For more information, see [Function lifecycle](https://docs.aws.amazon.com/lambda/latest/dg/images-create.html#images-lifecycle).
If you don't provide a customer managed key, Lambda uses an [AWS owned key](https://docs.aws.amazon.com/kms/latest/developerguide/concepts.html#aws-owned-cmk) or an [AWS managed key](https://docs.aws.amazon.com/kms/latest/developerguide/concepts.html#aws-managed-cmk).  
Type: String  
Pattern: `(arn:(aws[a-zA-Z-]*)?:[a-z0-9-.]+:.*)|()` 

 ** [LastModified](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-LastModified"></a>
The date and time that the function was last updated, in [ISO-8601 format](https://www.w3.org/TR/NOTE-datetime) (YYYY-MM-DDThh:mm:ss.sTZD).  
Type: String

 ** [LastUpdateStatus](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-LastUpdateStatus"></a>
The status of the last update that was performed on the function. This is first set to `Successful` after function creation completes.  
Type: String  
Valid Values: `Successful | Failed | InProgress` 

 ** [LastUpdateStatusReason](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-LastUpdateStatusReason"></a>
The reason for the last update that was performed on the function.  
Type: String

 ** [LastUpdateStatusReasonCode](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-LastUpdateStatusReasonCode"></a>
The reason code for the last update that was performed on the function.  
Type: String  
Valid Values: `EniLimitExceeded | InsufficientRolePermissions | InvalidConfiguration | InternalError | SubnetOutOfIPAddresses | InvalidSubnet | InvalidSecurityGroup | ImageDeleted | ImageAccessDenied | InvalidImage | KMSKeyAccessDenied | KMSKeyNotFound | InvalidStateKMSKey | DisabledKMSKey | EFSIOError | EFSMountConnectivityError | EFSMountFailure | EFSMountTimeout | InvalidRuntime | InvalidZipFileException | FunctionError | VcpuLimitExceeded | CapacityProviderScalingLimitExceeded | InsufficientCapacity | EC2RequestLimitExceeded | FunctionError.InitTimeout | FunctionError.RuntimeInitError | FunctionError.ExtensionInitError | FunctionError.InvalidEntryPoint | FunctionError.InvalidWorkingDirectory | FunctionError.PermissionDenied | FunctionError.TooManyExtensions | FunctionError.InitResourceExhausted | DisallowedByVpcEncryptionControl` 

 ** [Layers](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-Layers"></a>
The function's [layers](https://docs.aws.amazon.com/lambda/latest/dg/configuration-layers.html).  
Type: Array of [Layer](API_Layer.md) objects

 ** [LoggingConfig](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-LoggingConfig"></a>
The function's Amazon CloudWatch Logs configuration settings.  
Type: [LoggingConfig](API_LoggingConfig.md) object

 ** [MasterArn](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-MasterArn"></a>
For Lambda@Edge functions, the ARN of the main function.  
Type: String  
Length Constraints: Minimum length of 0. Maximum length of 10000.  
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-_]+))?` 

 ** [MemorySize](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-MemorySize"></a>
The amount of memory available to the function at runtime.  
Type: Integer  
Valid Range: Minimum value of 128. Maximum value of 32768.

 ** [PackageType](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-PackageType"></a>
The type of deployment package. Set to `Image` for container image and set `Zip` for .zip file archive.  
Type: String  
Valid Values: `Zip | Image` 

 ** [RevisionId](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-RevisionId"></a>
The latest updated revision of the function or alias.  
Type: String

 ** [Role](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-Role"></a>
The function's execution role.  
Type: String  
Pattern: `arn:(aws[a-zA-Z-]*)?:iam::\d{12}:role/?[a-zA-Z_0-9+=,.@\-_/]+` 

 ** [Runtime](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-Runtime"></a>
The identifier of the function's [ runtime](https://docs.aws.amazon.com/lambda/latest/dg/lambda-runtimes.html). 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](https://docs.aws.amazon.com/lambda/latest/dg/lambda-runtimes.html#runtime-deprecation-levels).  
For a list of all currently supported runtimes, see [Supported runtimes](https://docs.aws.amazon.com/lambda/latest/dg/lambda-runtimes.html#runtimes-supported).  
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` 

 ** [RuntimeVersionConfig](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-RuntimeVersionConfig"></a>
The ARN of the runtime and any errors that occured.  
Type: [RuntimeVersionConfig](API_RuntimeVersionConfig.md) object

 ** [SigningJobArn](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-SigningJobArn"></a>
The ARN of the signing job.  
Type: String  
Pattern: `arn:(aws[a-zA-Z0-9-]*):([a-zA-Z0-9\-])+:([a-z]{2}(-gov)?-[a-z]+-\d{1})?:(\d{12})?:(.*)` 

 ** [SigningProfileVersionArn](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-SigningProfileVersionArn"></a>
The ARN of the signing profile version.  
Type: String  
Pattern: `arn:(aws[a-zA-Z0-9-]*):([a-zA-Z0-9\-])+:([a-z]{2}(-gov)?-[a-z]+-\d{1})?:(\d{12})?:(.*)` 

 ** [SnapStart](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-SnapStart"></a>
Set `ApplyOn` to `PublishedVersions` to create a snapshot of the initialized execution environment when you publish a function version. For more information, see [Improving startup performance with Lambda SnapStart](https://docs.aws.amazon.com/lambda/latest/dg/snapstart.html).  
Type: [SnapStartResponse](API_SnapStartResponse.md) object

 ** [State](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-State"></a>
The current state of the function. When the state is `Inactive`, you can reactivate the function by invoking it.  
Type: String  
Valid Values: `Pending | Active | Inactive | Failed | Deactivating | Deactivated | ActiveNonInvocable | Deleting` 

 ** [StateReason](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-StateReason"></a>
The reason for the function's current state.  
Type: String

 ** [StateReasonCode](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-StateReasonCode"></a>
The reason code for the function's current state. When the code is `Creating`, you can't invoke or modify the function.  
Type: String  
Valid Values: `Idle | Creating | Restoring | EniLimitExceeded | InsufficientRolePermissions | InvalidConfiguration | InternalError | SubnetOutOfIPAddresses | InvalidSubnet | InvalidSecurityGroup | ImageDeleted | ImageAccessDenied | InvalidImage | KMSKeyAccessDenied | KMSKeyNotFound | InvalidStateKMSKey | DisabledKMSKey | EFSIOError | EFSMountConnectivityError | EFSMountFailure | EFSMountTimeout | InvalidRuntime | InvalidZipFileException | FunctionError | DrainingDurableExecutions | VcpuLimitExceeded | CapacityProviderScalingLimitExceeded | InsufficientCapacity | EC2RequestLimitExceeded | FunctionError.InitTimeout | FunctionError.RuntimeInitError | FunctionError.ExtensionInitError | FunctionError.InvalidEntryPoint | FunctionError.InvalidWorkingDirectory | FunctionError.PermissionDenied | FunctionError.TooManyExtensions | FunctionError.InitResourceExhausted | DisallowedByVpcEncryptionControl` 

 ** [TenancyConfig](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-TenancyConfig"></a>
The function's tenant isolation configuration settings. Determines whether the Lambda function runs on a shared or dedicated infrastructure per unique tenant.  
Type: [TenancyConfig](API_TenancyConfig.md) object

 ** [Timeout](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-Timeout"></a>
The amount of time in seconds that Lambda allows a function to run before stopping it.  
Type: Integer  
Valid Range: Minimum value of 1.

 ** [TracingConfig](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-TracingConfig"></a>
The function's AWS X-Ray tracing configuration.  
Type: [TracingConfigResponse](API_TracingConfigResponse.md) object

 ** [Version](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-Version"></a>
The version of the Lambda function.  
Type: String  
Length Constraints: Minimum length of 1. Maximum length of 1024.  
Pattern: `(\$LATEST|[0-9]+)` 

 ** [VpcConfig](#API_UpdateFunctionConfiguration_ResponseSyntax) **   <a name="lambda-UpdateFunctionConfiguration-response-VpcConfig"></a>
The function's networking configuration.  
Type: [VpcConfigResponse](API_VpcConfigResponse.md) object

## Errors


For information about the errors that are common to all actions, see [Common Error Types](CommonErrors.md).

 ** CodeSigningConfigNotFoundException **   
The specified code signing configuration does not exist.  
HTTP Status Code: 404

 ** CodeVerificationFailedException **   
The code signature failed one or more of the validation checks for signature mismatch or expiry, and the code signing policy is set to ENFORCE. Lambda blocks the deployment.  
HTTP Status Code: 400

 ** InvalidCodeSignatureException **   
The code signature failed the integrity check. If the integrity check fails, then Lambda blocks deployment, even if the code signing policy is set to WARN.  
HTTP Status Code: 400

 ** InvalidParameterValueException **   
One of the parameters in the request is not valid.    
 ** message **   
The exception message.  
 ** Type **   
The exception type.
HTTP Status Code: 400

 ** PreconditionFailedException **   
The RevisionId provided does not match the latest RevisionId for the Lambda function or alias.  
+  **For AddPermission and RemovePermission API operations:** Call `GetPolicy` to retrieve the latest RevisionId for your resource.
+  **For all other API operations:** Call `GetFunction` or `GetAlias` to retrieve the latest RevisionId for your resource.  
 ** message **   
The exception message.  
 ** Type **   
The exception type.
HTTP Status Code: 412

 ** ResourceConflictException **   
The resource already exists, or another operation is in progress.    
 ** message **   
The exception message.  
 ** Type **   
The exception type.
HTTP Status Code: 409

 ** ResourceNotFoundException **   
The resource specified in the request does not exist.  
HTTP Status Code: 404

 ** ServiceException **   
The AWS Lambda service encountered an internal error.  
HTTP Status Code: 500

 ** TooManyRequestsException **   
The request throughput limit was exceeded. For more information, see [Lambda quotas](https://docs.aws.amazon.com/lambda/latest/dg/gettingstarted-limits.html#api-requests).    
 ** retryAfterSeconds **   
The number of seconds the caller should wait before retrying.
HTTP Status Code: 429

## See Also


For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS Command Line Interface V2](https://docs.aws.amazon.com/goto/cli2/lambda-2015-03-31/UpdateFunctionConfiguration) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/lambda-2015-03-31/UpdateFunctionConfiguration) 
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/lambda-2015-03-31/UpdateFunctionConfiguration) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/lambda-2015-03-31/UpdateFunctionConfiguration) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/lambda-2015-03-31/UpdateFunctionConfiguration) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/lambda-2015-03-31/UpdateFunctionConfiguration) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/lambda-2015-03-31/UpdateFunctionConfiguration) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/lambda-2015-03-31/UpdateFunctionConfiguration) 
+  [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/lambda-2015-03-31/UpdateFunctionConfiguration) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/lambda-2015-03-31/UpdateFunctionConfiguration)