Request Syntax URI Request Parameters Request Body Response Syntax Response Elements Errors See Also

CreateWebFunctionRevision

Creates an immutable revision for a web function. A revision represents a specific version of the function code and configuration.

To use this operation, you must have the CreateWebFunctionRevision permission on the web function, not on the revision being created.

Request Syntax


POST /2025-03-07/web-functions/functionName/revisions HTTP/1.1
Content-type: application/json

{
   "buildConfig": { 
      "codeConfig": { 
         "s3Object": { 
            "bucket": "string",
            "key": "string",
            "versionId": "string"
         }
      },
      "runtimeConfig": { 
         "runtime": "string"
      }
   },
   "description": "string",
   "kmsKeyArn": "string",
   "serviceConfig": { 
      "egressNetworkConnectorArn": "string",
      "environmentVariables": { 
         "string" : "string" 
      },
      "executionRoleArn": "string",
      "maxConcurrencyPerEnvironment": number,
      "telemetryConfig": { 
         "loggingConfig": { 
            "applicationLogLevel": "string",
            "logGroup": "string",
            "systemLogLevel": "string"
         }
      },
      "timeoutSeconds": number
   }
}

URI Request Parameters

The request uses the following URI parameters.

functionName

The web function.

You can specify either of the following:

The function name, for example my-function.
The function ARN.

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 256.

Required: Yes

Request Body

The request accepts the following data in JSON format.

buildConfig

The build configuration for the revision, including code location and runtime settings.

Type: BuildConfig object

Required: Yes

description

A description of the revision.

Type: String

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

Required: No

kmsKeyArn

The Amazon Resource Name (ARN) of the AWS Key Management Service (AWS KMS) key used to encrypt the revision's code and environment variables.

Type: String

Length Constraints: Minimum length of 20. Maximum length of 2048.

Pattern: arn:(aws[a-z-]*):kms:[a-z0-9-]+:[0-9]{12}:key/[a-z0-9-]+

Required: No

serviceConfig

The service configuration for the revision, including execution role, timeout, and concurrency settings.

Type: ServiceConfig object

Required: Yes

Response Syntax


HTTP/1.1 202
Content-type: application/json

{
   "buildConfig": { 
      "codeConfig": { 
         "s3Object": { 
            "bucket": "string",
            "key": "string",
            "versionId": "string"
         }
      },
      "runtimeConfig": { 
         "runtime": "string"
      }
   },
   "createdAt": "string",
   "description": "string",
   "errors": [ 
      { 
         "attribute": "string",
         "errorCode": "string",
         "errorMessage": "string"
      }
   ],
   "functionArn": "string",
   "kmsKeyArn": "string",
   "revisionArn": "string",
   "revisionId": "string",
   "serviceConfig": { 
      "egressNetworkConnectorArn": "string",
      "environmentVariables": { 
         "string" : "string" 
      },
      "executionRoleArn": "string",
      "maxConcurrencyPerEnvironment": number,
      "telemetryConfig": { 
         "loggingConfig": { 
            "applicationLogLevel": "string",
            "logGroup": "string",
            "systemLogLevel": "string"
         }
      },
      "timeoutSeconds": number
   },
   "state": "string",
   "stateReason": "string"
}

Response Elements

If the action is successful, the service sends back an HTTP 202 response.

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

buildConfig

The build configuration for a web function revision, including code location and runtime settings.

Type: BuildConfig object

createdAt

The date and time the revision was created.

Type: Timestamp

description

The description of the revision.

Type: String

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

errors

A list of errors encountered during revision creation. This field is absent when the revision has no errors.

Type: Array of RevisionError objects

Array Members: Minimum number of 1 item. Maximum number of 50 items.

functionArn

The Amazon Resource Name (ARN) of the web function.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 2048.

kmsKeyArn

The Amazon Resource Name (ARN) of the AWS KMS key used to encrypt the revision's code and environment variables.

Type: String

Length Constraints: Minimum length of 20. Maximum length of 2048.

Pattern: arn:(aws[a-z-]*):kms:[a-z0-9-]+:[0-9]{12}:key/[a-z0-9-]+

revisionArn

The Amazon Resource Name (ARN) of the revision.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 2048.

revisionId

The identifier of the revision.

Type: String

Length Constraints: Minimum length of 1. Maximum length of 256.

serviceConfig

The service configuration for a web function revision, including execution role, timeout, VPC network access, concurrency, and telemetry settings.

Type: ServiceConfig object

state

The current state of the revision.

Type: String

Valid Values: Pending | Active | Failed

stateReason

The reason for the current state of the revision.

Type: String

Errors

For information about the errors that are common to all actions, see Common Error Types.

AccessDeniedException

You don't have permission to perform this operation. Check the IAM policies for your identity and any resource-based policy on the web function.

message: A message describing the access denied error.

HTTP Status Code: 403

ConflictException

The request conflicts with the current state of the resource. For example, the resource is being modified by another request, you tried to delete a revision that is serving traffic on an endpoint, or the policy revision ID that you specified doesn't match the current policy. Resolve the conflict and try again.

message: A message describing the conflict.
resourceId: The identifier of the resource in conflict.
resourceType: The type of the resource in conflict.

HTTP Status Code: 409

InternalServerException

The request failed because of an internal error in the service. Retry the request. If the error persists, open a support case.

message: A message describing the internal error.

HTTP Status Code: 500

ResourceNotFoundException

The specified web function, revision, endpoint, or resource-based policy doesn't exist. Verify the resource identifier and try again.

message: A message describing the resource not found error.
resourceId: The identifier of the resource that was not found.
resourceType: The type of the resource that was not found.

HTTP Status Code: 404

ServiceQuotaExceededException

The request would exceed a service quota, such as the maximum number of web functions in your account or the maximum number of revisions or endpoints per web function. Request a quota increase or reduce usage and try again.

message: A message describing the quota that was exceeded.
quotaCode: The quota code of the exceeded quota.
resourceId: The identifier of the resource that exceeded the quota.
resourceType: The type of resource that exceeded the quota.
serviceCode: The service code of the service that owns the quota.

HTTP Status Code: 402

ThrottlingException

The request was denied because it exceeded the request rate that Lambda allows for your account. Reduce the frequency of requests and retry with exponential backoff.

message: A message describing the throttling error.
quotaCode: The quota code that was exceeded, if applicable.
retryAfterSeconds: The number of seconds to wait before retrying the request.
serviceCode: The service code of the throttled service.

HTTP Status Code: 429

ValidationException

The request failed validation because a parameter was missing, malformed, or outside the allowed range. Check the request parameters and try again.

message: A message describing the validation error.

HTTP Status Code: 400