DeploymentPreference

Specifies the configurations to enable gradual Lambda deployments. For more information about configuring gradual Lambda deployments, see Deploying serverless applications gradually with AWS SAM.

Note

You must specify an AutoPublishAlias in your AWS::Serverless::Function to use a DeploymentPreference object, otherwise an error will result.

Syntax

To declare this entity in your AWS Serverless Application Model (AWS SAM) template, use the following syntax.

YAML

  Alarms: List
  Enabled: Boolean
  Hooks: Hooks
  PassthroughCondition: Boolean
  Role: String
  TriggerConfigurations: List
  Type: String

Properties

Alarms

A list of CloudWatch alarms that you want to be triggered by any errors raised by the deployment.

This property accepts the Fn::If intrinsic function. See the Examples section at the bottom of this topic for an example template that uses Fn::If.

Type: List

Required: No

AWS CloudFormation compatibility: This property is unique to AWS SAM and doesn't have an AWS CloudFormation equivalent.

Enabled

Whether this deployment preference is enabled.

Type: Boolean

Required: No

Default: True

AWS CloudFormation compatibility: This property is unique to AWS SAM and doesn't have an AWS CloudFormation equivalent.

Hooks

Validation Lambda functions that are run before and after traffic shifting.

Type: Hooks

Required: No

AWS CloudFormation compatibility: This property is unique to AWS SAM and doesn't have an AWS CloudFormation equivalent.

PassthroughCondition

If True, and if this deployment preference is enabled, the function's Condition will be passed through to the generated CodeDeploy resource. Generally, you should set this to True. Otherwise, the CodeDeploy resource would be created even if the function's Condition resolves to False.

Type: Boolean

Required: No

AWS CloudFormation compatibility: This property is unique to AWS SAM and doesn't have an AWS CloudFormation equivalent.

Role

An IAM role ARN that CodeDeploy will use for traffic shifting. An IAM role will not be created if this is provided.

Type: String

Required: No

AWS CloudFormation compatibility: This property is unique to AWS SAM and doesn't have an AWS CloudFormation equivalent.

TriggerConfigurations

A list of trigger configurations you want to associate with the deployment group. Used to notify an SNS topic on lifecycle events.

Type: List

Required: No

AWS CloudFormation compatibility: This property is passed directly to the TriggerConfigurations property of an AWS::CodeDeploy::DeploymentGroup resource.

Type

There are two categories of deployment types at the moment: Linear and Canary. For more information about available deployment types see Deploying serverless applications gradually with AWS SAM.

Type: String

Required: Yes

AWS CloudFormation compatibility: This property is unique to AWS SAM and doesn't have an AWS CloudFormation equivalent.

Examples

DeploymentPreference with pre- and post-traffic hooks.

Example deployment preference that contains pre- and post-traffic hooks.

YAML

DeploymentPreference:
  Enabled: true
  Type: Canary10Percent10Minutes 
  Alarms:
    - !Ref: AliasErrorMetricGreaterThanZeroAlarm
    - !Ref: LatestVersionErrorMetricGreaterThanZeroAlarm
  Hooks:
    PreTraffic:
      !Ref: PreTrafficLambdaFunction
    PostTraffic:
      !Ref: PostTrafficLambdaFunction

DeploymentPreference with Fn::If intrinsic function

Example deployment preference that uses Fn::If for configuring alarms. In this example, Alarm1 will be configured if MyCondition is true, and Alarm2 and Alarm5 will be configured if MyCondition is false.

YAML

DeploymentPreference:
  Enabled: true
  Type: Canary10Percent10Minutes 
  Alarms:
    Fn::If:
      - MyCondition
      - - Alarm1
      - - Alarm2
        - Alarm5