AWS::Lambda::Alias VersionWeight

The traffic-shifting configuration of a Lambda function alias.

Syntax

To declare this entity in your AWS CloudFormation template, use the following syntax:

JSON

{
  "FunctionVersion" : String,
  "FunctionWeight" : Number
}

YAML

  FunctionVersion: String
  FunctionWeight: Number

Properties

FunctionVersion

The qualifier of the second version.

Required: Yes

Type: String

Update requires: No interruption

FunctionWeight

The percentage of traffic that the alias routes to the second version.

Required: Yes

Type: Number

Update requires: No interruption

Examples

Routing Configuration

An alias that routes half of incoming requests to a second version.

YAML

  alias:
    Type: AWS::Lambda::Alias
    Properties:
      FunctionName: !Ref function
      FunctionVersion: !GetAtt newVersion.Version
      Name: BLUE
      RoutingConfig:
        AdditionalVersionWeights:
          - FunctionVersion: !GetAtt version.Version
            FunctionWeight: 0.5