AWS::StepFunctions::StateMachineAlias DeploymentPreference - AWS CloudFormation
SyntaxProperties

AWS::StepFunctions::StateMachineAlias DeploymentPreference

Enables gradual state machine deployments. CloudFormation automatically shifts traffic from the version the alias currently points to, to a new state machine version that you specify.

Syntax

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

JSON

{
  "Alarms" : [ String, ... ],
  "Interval" : Integer,
  "Percentage" : Integer,
  "StateMachineVersionArn" : String,
  "Type" : String
}

YAML

  Alarms: 
    - String
  Interval: Integer
  Percentage: Integer
  StateMachineVersionArn: String
  Type: String

Properties

Alarms

A list of Amazon CloudWatch alarm names to be monitored during the deployment. The deployment fails and rolls back if any of these alarms go into the ALARM state.

Important

Amazon CloudWatch considers nonexistent alarms to have an OK state. If you provide an invalid alarm name or provide the ARN of an alarm instead of its name, your deployment may not roll back correctly.

Required: No

Type: Array of String

Minimum: 1 | 1

Maximum: 256 | 100

Update requires: No interruption

Interval

The time in minutes between each traffic shifting increment.

Required: No

Type: Integer

Minimum: 1

Maximum: 2100

Update requires: No interruption

Percentage

The percentage of traffic to shift to the new version in each increment.

Required: No

Type: Integer

Minimum: 1

Maximum: 99

Update requires: No interruption

StateMachineVersionArn

The Amazon Resource Name (ARN) of the AWS::StepFunctions::StateMachineVersion resource that will be the final version to which the alias points to when the traffic shifting is complete.

While performing gradual deployments, you can only provide a single state machine version ARN. To explicitly set version weights in a CloudFormation template, use RoutingConfiguration instead.

Required: Yes

Type: String

Minimum: 1

Maximum: 2048

Update requires: No interruption

Type

The type of deployment you want to perform. You can specify one of the following types:

  • LINEAR - Shifts traffic to the new version in equal increments with an equal number of minutes between each increment.

    For example, if you specify the increment percent as 20 with an interval of 600 minutes, this deployment increases traffic by 20 percent every 600 minutes until the new version receives 100 percent of the traffic. This deployment immediately rolls back the new version if any CloudWatch alarms are triggered.

  • ALL_AT_ONCE - Shifts 100 percent of traffic to the new version immediately. CloudFormation monitors the new version and rolls it back automatically to the previous version if any CloudWatch alarms are triggered.

  • CANARY - Shifts traffic in two increments.

    In the first increment, a small percentage of traffic, for example, 10 percent is shifted to the new version. In the second increment, before a specified time interval in seconds gets over, the remaining traffic is shifted to the new version. The shift to the new version for the remaining traffic takes place only if no CloudWatch alarms are triggered during the specified time interval.

Required: Yes

Type: String

Allowed values: LINEAR | ALL_AT_ONCE | CANARY

Update requires: No interruption