Examkin

Question

Difficulty: MediumDeployment Strategies

A developer is updating a serverless API backend running on AWS Lambda. The deployment must minimize user-facing impact by routing 10%10\% of the incoming traffic to the new Lambda version for a test window of 1010 minutes, while monitoring a CloudWatch alarm. If the alarm remains green, the remaining 90%90\% of traffic must shift to the new version immediately. If the alarm is triggered, the deployment must revert to the original version. Which AWS CodeDeploy configuration meets these requirements?

  1. A
    CodeDeployDefault.LambdaLinear10PercentEvery10Minutes
  2. CodeDeployDefault.LambdaCanary10Percent10MinutesAnswer
  3. C
    CodeDeployDefault.LambdaCanary10Percent15Minutes
  4. D
    CodeDeployDefault.LambdaAllAtOnce

Answer

CodeDeployDefault.LambdaCanary10Percent10Minutes
The configuration CodeDeployDefault.LambdaCanary10Percent10Minutes routes 10% of traffic to the new Lambda version, waits 10 minutes, and then immediately routes the remaining 90% if no alarms are triggered. This perfectly aligns with the requirement for a 10-minute test window at 10% traffic followed by an immediate shift of the remaining traffic.

Step-by-Step Solution

1
Analyze the traffic shifting requirement
The deployment requires routing 10% of traffic initially, waiting for a specific test duration, and then routing the remaining 90% immediately.
This behavior corresponds to a Canary deployment strategy rather than a Linear or All-At-Once deployment strategy.
2
Identify the required test window duration
The test window duration is specified as 10 minutes.
This requires a configuration that specifies a 10-minute wait time.
3
Select the matching pre-defined AWS CodeDeploy configuration
The configuration CodeDeployDefault.LambdaCanary10Percent10Minutes meets both the 10% initial shift and 10-minute duration criteria.
CodeDeployDefault.LambdaCanary10Percent10Minutes routes 10% of traffic first and shifts the remaining 90% after 10 minutes if health checks pass.

Key Concept

AWS CodeDeploy Canary vs Linear configurations for serverless deployments
Estimated Time:1m 30s
Rate this question

Topics

Deployment Strategies

More questions from this topic