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Difficulty: MediumDeployment Strategies

A developer is updating a critical serverless API hosted on AWS Lambda using AWS CodeDeploy. The deployment must meet the following requirements:

- Direct only 10%10\% of the production traffic to the new Lambda function version initially.
- Route all remaining traffic to the new version after a 1010-minute monitoring window.
- Roll back the deployment automatically if any error metrics exceed the normal threshold.

Which of the following configuration options should the developer select to meet these requirements? (Select TWO.)

  1. Specify CodeDeployDefault.LambdaCanary10Percent10Minutes as the deployment configuration.Answer
  2. Configure CloudWatch alarms in the CodeDeploy deployment group to monitor error metrics and trigger automatic rollbacks.Answer
  3. C
    Specify CodeDeployDefault.LambdaLinear10PercentEvery10Minutes as the deployment configuration.
  4. D
    Specify CodeDeployDefault.LambdaCanary10Percent5Minutes as the deployment configuration.
  5. E
    Create an Amazon EventBridge rule to trigger a custom Lambda function that deletes the new alias version if an error occurs.

Answer

To meet the requirements, the developer must select the Canary 10 percent 10 minutes deployment configuration to manage the traffic routing, and configure CloudWatch alarms on the CodeDeploy deployment group to handle automatic rollbacks on error metrics.
The correct configuration is achieved by using the Canary 10 percent 10 minutes deployment strategy and configuring CloudWatch alarms in the CodeDeploy deployment group. The canary strategy ensures the new version receives 10%10\% of the traffic initially, and shifts the remaining traffic after 1010 minutes. The CloudWatch alarms enable CodeDeploy to monitor the error metrics and perform an automated rollback to the previous version if thresholds are breached.

Step-by-Step Solution

1
Analyze the traffic shifting pattern.
The requirements specify routing 10%10\% of the traffic first, waiting 1010 minutes, and then routing the remaining 90%90\%. This corresponds to a canary deployment strategy with a 1010-minute interval.
Identifying the shift pattern helps filter out linear strategies and incorrect canary intervals.
2
Select the correct predefined AWS CodeDeploy configuration.
Choose the configuration named CodeDeployDefault.LambdaCanary10Percent10Minutes.
This matches the target behavior of a 10%10\% shift followed by a 1010-minute pause before complete routing.
3
Identify the mechanism for automated rollback.
CodeDeploy deployment groups can be associated with CloudWatch alarms (such as Lambda invocation errors).
If an alarm triggers during the deployment, CodeDeploy detects it and automatically executes a rollback to the original Lambda version.

Key Concept

AWS Lambda Canary Deployment and Automated Rollbacks using CodeDeploy
Estimated Time:1m 30s
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Topics

Deployment Strategies

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