Lambda / Client / publish_version

publish_version#

Lambda.Client.publish_version(**kwargs)#

Creates a version from the current code and configuration of a function. Use versions to create a snapshot of your function code and configuration that doesn’t change.

Lambda doesn’t publish a version if the function’s configuration and code haven’t changed since the last version. Use UpdateFunctionCode or UpdateFunctionConfiguration to update the function before publishing a version.

Clients can invoke versions directly or with an alias. To create an alias, use CreateAlias.

Request Syntax

response = client.publish_version(
    FunctionName='string',
    CodeSha256='string',
    Description='string',
    RevisionId='string'
)

Parameters:

FunctionName (string) –
[REQUIRED]

The name or ARN of the Lambda function.

Name formats
- Function name - MyFunction.
- Function ARN - arn:aws:lambda:us-west-2:123456789012:function:MyFunction.
- Partial ARN - 123456789012:function:MyFunction.
The length constraint applies only to the full ARN. If you specify only the function name, it is limited to 64 characters in length.
CodeSha256 (string) – Only publish a version if the hash value matches the value that’s specified. Use this option to avoid publishing a version if the function code has changed since you last updated it. You can get the hash for the version that you uploaded from the output of UpdateFunctionCode.
Description (string) – A description for the version to override the description in the function configuration.
RevisionId (string) – Only update the function if the revision ID matches the ID that’s specified. Use this option to avoid publishing a version if the function configuration has changed since you last updated it.

Return type:

dict

Returns:

Response Syntax

{
    'FunctionName': 'string',
    'FunctionArn': 'string',
    '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'|'dotnet8'|'nodejs4.3-edge'|'go1.x'|'ruby2.5'|'ruby2.7'|'provided'|'provided.al2'|'nodejs18.x'|'python3.10'|'java17'|'ruby3.2'|'ruby3.3'|'python3.11'|'nodejs20.x'|'provided.al2023'|'python3.12'|'java21'|'python3.13'|'nodejs22.x',
    'Role': 'string',
    'Handler': 'string',
    'CodeSize': 123,
    'Description': 'string',
    'Timeout': 123,
    'MemorySize': 123,
    'LastModified': 'string',
    'CodeSha256': 'string',
    'Version': 'string',
    'VpcConfig': {
        'SubnetIds': [
            'string',
        ],
        'SecurityGroupIds': [
            'string',
        ],
        'VpcId': 'string',
        'Ipv6AllowedForDualStack': True|False
    },
    'DeadLetterConfig': {
        'TargetArn': 'string'
    },
    'Environment': {
        'Variables': {
            'string': 'string'
        },
        'Error': {
            'ErrorCode': 'string',
            'Message': 'string'
        }
    },
    'KMSKeyArn': 'string',
    'TracingConfig': {
        'Mode': 'Active'|'PassThrough'
    },
    'MasterArn': 'string',
    'RevisionId': 'string',
    'Layers': [
        {
            'Arn': 'string',
            'CodeSize': 123,
            'SigningProfileVersionArn': 'string',
            'SigningJobArn': 'string'
        },
    ],
    'State': 'Pending'|'Active'|'Inactive'|'Failed',
    'StateReason': 'string',
    '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',
    'LastUpdateStatus': 'Successful'|'Failed'|'InProgress',
    'LastUpdateStatusReason': 'string',
    'LastUpdateStatusReasonCode': 'EniLimitExceeded'|'InsufficientRolePermissions'|'InvalidConfiguration'|'InternalError'|'SubnetOutOfIPAddresses'|'InvalidSubnet'|'InvalidSecurityGroup'|'ImageDeleted'|'ImageAccessDenied'|'InvalidImage'|'KMSKeyAccessDenied'|'KMSKeyNotFound'|'InvalidStateKMSKey'|'DisabledKMSKey'|'EFSIOError'|'EFSMountConnectivityError'|'EFSMountFailure'|'EFSMountTimeout'|'InvalidRuntime'|'InvalidZipFileException'|'FunctionError',
    'FileSystemConfigs': [
        {
            'Arn': 'string',
            'LocalMountPath': 'string'
        },
    ],
    'PackageType': 'Zip'|'Image',
    'ImageConfigResponse': {
        'ImageConfig': {
            'EntryPoint': [
                'string',
            ],
            'Command': [
                'string',
            ],
            'WorkingDirectory': 'string'
        },
        'Error': {
            'ErrorCode': 'string',
            'Message': 'string'
        }
    },
    'SigningProfileVersionArn': 'string',
    'SigningJobArn': 'string',
    'Architectures': [
        'x86_64'|'arm64',
    ],
    'EphemeralStorage': {
        'Size': 123
    },
    'SnapStart': {
        'ApplyOn': 'PublishedVersions'|'None',
        'OptimizationStatus': 'On'|'Off'
    },
    'RuntimeVersionConfig': {
        'RuntimeVersionArn': 'string',
        'Error': {
            'ErrorCode': 'string',
            'Message': 'string'
        }
    },
    'LoggingConfig': {
        'LogFormat': 'JSON'|'Text',
        'ApplicationLogLevel': 'TRACE'|'DEBUG'|'INFO'|'WARN'|'ERROR'|'FATAL',
        'SystemLogLevel': 'DEBUG'|'INFO'|'WARN',
        'LogGroup': 'string'
    }
}

Response Structure

(dict) –

Details about a function’s configuration.
- FunctionName (string) –
  
  The name of the function.
- FunctionArn (string) –
  
  The function’s Amazon Resource Name (ARN).
- Runtime (string) –
  
  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.
- Role (string) –
  
  The function’s execution role.
- Handler (string) –
  
  The function that Lambda calls to begin running your function.
- CodeSize (integer) –
  
  The size of the function’s deployment package, in bytes.
- Description (string) –
  
  The function’s description.
- Timeout (integer) –
  
  The amount of time in seconds that Lambda allows a function to run before stopping it.
- MemorySize (integer) –
  
  The amount of memory available to the function at runtime.
- LastModified (string) –
  
  The date and time that the function was last updated, in ISO-8601 format (YYYY-MM-DDThh:mm:ss.sTZD).
- CodeSha256 (string) –
  
  The SHA256 hash of the function’s deployment package.
- Version (string) –
  
  The version of the Lambda function.
- VpcConfig (dict) –
  
  The function’s networking configuration.
  - SubnetIds (list) –
    
    A list of VPC subnet IDs.
    - (string) –
  - SecurityGroupIds (list) –
    
    A list of VPC security group IDs.
    - (string) –
  - VpcId (string) –
    
    The ID of the VPC.
  - Ipv6AllowedForDualStack (boolean) –
    
    Allows outbound IPv6 traffic on VPC functions that are connected to dual-stack subnets.
- DeadLetterConfig (dict) –
  
  The function’s dead letter queue.
  - TargetArn (string) –
    
    The Amazon Resource Name (ARN) of an Amazon SQS queue or Amazon SNS topic.
- Environment (dict) –
  
  The function’s environment variables. Omitted from CloudTrail logs.
  - Variables (dict) –
    
    Environment variable key-value pairs. Omitted from CloudTrail logs.
    - (string) –
      - (string) –
  - Error (dict) –
    
    Error messages for environment variables that couldn’t be applied.
    - ErrorCode (string) –
      
      The error code.
    - Message (string) –
      
      The error message.
- KMSKeyArn (string) –
  
  The ARN of the Key Management Service (KMS) customer managed key that’s used to encrypt the following resources:
  - The function’s environment variables.
  - The function’s Lambda SnapStart 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.
  - 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.
  If you don’t provide a customer managed key, Lambda uses an Amazon Web Services owned key or an Amazon Web Services managed key.
- TracingConfig (dict) –
  
  The function’s X-Ray tracing configuration.
  - Mode (string) –
    
    The tracing mode.
- MasterArn (string) –
  
  For Lambda@Edge functions, the ARN of the main function.
- RevisionId (string) –
  
  The latest updated revision of the function or alias.
- Layers (list) –
  
  The function’s layers.
  - (dict) –
    
    An Lambda layer.
    - Arn (string) –
      
      The Amazon Resource Name (ARN) of the function layer.
    - CodeSize (integer) –
      
      The size of the layer archive in bytes.
    - SigningProfileVersionArn (string) –
      
      The Amazon Resource Name (ARN) for a signing profile version.
    - SigningJobArn (string) –
      
      The Amazon Resource Name (ARN) of a signing job.
- State (string) –
  
  The current state of the function. When the state is Inactive, you can reactivate the function by invoking it.
- StateReason (string) –
  
  The reason for the function’s current state.
- StateReasonCode (string) –
  
  The reason code for the function’s current state. When the code is Creating, you can’t invoke or modify the function.
- LastUpdateStatus (string) –
  
  The status of the last update that was performed on the function. This is first set to Successful after function creation completes.
- LastUpdateStatusReason (string) –
  
  The reason for the last update that was performed on the function.
- LastUpdateStatusReasonCode (string) –
  
  The reason code for the last update that was performed on the function.
- FileSystemConfigs (list) –
  
  Connection settings for an Amazon EFS file system.
  - (dict) –
    
    Details about the connection between a Lambda function and an Amazon EFS file system.
    - Arn (string) –
      
      The Amazon Resource Name (ARN) of the Amazon EFS access point that provides access to the file system.
    - LocalMountPath (string) –
      
      The path where the function can access the file system, starting with /mnt/.
- PackageType (string) –
  
  The type of deployment package. Set to Image for container image and set Zip for .zip file archive.
- ImageConfigResponse (dict) –
  
  The function’s image configuration values.
  - ImageConfig (dict) –
    
    Configuration values that override the container image Dockerfile.
    - EntryPoint (list) –
      
      Specifies the entry point to their application, which is typically the location of the runtime executable.
      - (string) –
    - Command (list) –
      
      Specifies parameters that you want to pass in with ENTRYPOINT.
      - (string) –
    - WorkingDirectory (string) –
      
      Specifies the working directory.
  - Error (dict) –
    
    Error response to GetFunctionConfiguration.
    - ErrorCode (string) –
      
      Error code.
    - Message (string) –
      
      Error message.
- SigningProfileVersionArn (string) –
  
  The ARN of the signing profile version.
- SigningJobArn (string) –
  
  The ARN of the signing job.
- Architectures (list) –
  
  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.
  - (string) –
- EphemeralStorage (dict) –
  
  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).
  - Size (integer) –
    
    The size of the function’s /tmp directory.
- SnapStart (dict) –
  
  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.
  - ApplyOn (string) –
    
    When set to PublishedVersions, Lambda creates a snapshot of the execution environment when you publish a function version.
  - OptimizationStatus (string) –
    
    When you provide a qualified Amazon Resource Name (ARN), this response element indicates whether SnapStart is activated for the specified function version.
- RuntimeVersionConfig (dict) –
  
  The ARN of the runtime and any errors that occured.
  - RuntimeVersionArn (string) –
    
    The ARN of the runtime version you want the function to use.
  - Error (dict) –
    
    Error response when Lambda is unable to retrieve the runtime version for a function.
    - ErrorCode (string) –
      
      The error code.
    - Message (string) –
      
      The error message.
- LoggingConfig (dict) –
  
  The function’s Amazon CloudWatch Logs configuration settings.
  - LogFormat (string) –
    
    The format in which Lambda sends your function’s application and system logs to CloudWatch. Select between plain text and structured JSON.
  - ApplicationLogLevel (string) –
    
    Set this property to filter the application logs for your function that Lambda sends to CloudWatch. Lambda only sends application logs at the selected level of detail and lower, where TRACE is the highest level and FATAL is the lowest.
  - SystemLogLevel (string) –
    
    Set this property to filter the system logs for your function that Lambda sends to CloudWatch. Lambda only sends system logs at the selected level of detail and lower, where DEBUG is the highest level and WARN is the lowest.
  - LogGroup (string) –
    
    The name of the Amazon CloudWatch log group the function sends logs to. By default, Lambda functions send logs to a default log group named /aws/lambda/<function name>. To use a different log group, enter an existing log group or enter a new log group name.

Exceptions

Examples

This operation publishes a version of a Lambda function

response = client.publish_version(
    CodeSha256='',
    Description='',
    FunctionName='myFunction',
)

print(response)

Expected Output:

{
    'CodeSha256': 'YFgDgEKG3ugvF1+pX64gV6tu9qNuIYNUdgJm8nCxsm4=',
    'CodeSize': 5797206,
    'Description': 'Process image objects from Amazon S3.',
    'Environment': {
        'Variables': {
            'BUCKET': 'my-bucket-1xpuxmplzrlbh',
            'PREFIX': 'inbound',
        },
    },
    'FunctionArn': 'arn:aws:lambda:us-west-2:123456789012:function:my-function',
    'FunctionName': 'my-function',
    'Handler': 'index.handler',
    'KMSKeyArn': 'arn:aws:kms:us-west-2:123456789012:key/b0844d6c-xmpl-4463-97a4-d49f50839966',
    'LastModified': '2020-04-10T19:06:32.563+0000',
    'LastUpdateStatus': 'Successful',
    'MemorySize': 256,
    'RevisionId': 'b75dcd81-xmpl-48a8-a75a-93ba8b5b9727',
    'Role': 'arn:aws:iam::123456789012:role/lambda-role',
    'Runtime': 'nodejs12.x',
    'State': 'Active',
    'Timeout': 5,
    'TracingConfig': {
        'Mode': 'Active',
    },
    'Version': '1',
    'ResponseMetadata': {
        '...': '...',
    },
}