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Difficulty: MediumDeployment Strategies

A developer is updating a serverless application hosted on AWS Lambda and wants to roll out a new function version using AWS CodeDeploy. The deployment must route 10%10\% of incoming traffic to the new version initially. After a 1010-minute observation period, if no errors are detected by Amazon CloudWatch alarms, all remaining traffic (90%90\%) must be routed to the new version. Which AWS CodeDeploy deployment configuration meets these requirements?

  1. A
    CodeDeployDefault.LambdaLinear10PercentEvery10Minutes
  2. CodeDeployDefault.LambdaCanary10Percent10MinutesAnswer
  3. C
    CodeDeployDefault.LambdaCanary10Percent5Minutes
  4. D
    CodeDeployDefault.LambdaAllAtOnce

Answer

CodeDeployDefault.LambdaCanary10Percent10Minutes
The configuration CodeDeployDefault.LambdaCanary10Percent10Minutes shifts 10%10\% of the traffic to the new Lambda version initially, waits for a 1010-minute interval to monitor for errors via CloudWatch alarms, and then routes the remaining 90%90\% of the traffic to the new version.

Step-by-Step Solution

1
Analyze the traffic shifting requirement
The requirement specifies routing 10%10\% of traffic to the new version initially, waiting 1010 minutes, and then shifting all remaining 90%90\% of traffic to the new version.
This traffic shifting pattern describes a canary deployment strategy (an initial small slice of traffic followed by a single promotion of all remaining traffic after a specific delay) rather than a linear or all-at-once deployment.
2
Identify the corresponding AWS CodeDeploy predefined configuration
The configuration CodeDeployDefault.LambdaCanary10Percent10Minutes matches the 10%10\% initial traffic split and 1010-minute wait duration.
AWS CodeDeploy provides predefined deployment configurations for Lambda. The Canary configurations specify the percentage to shift and the wait time before shifting the remaining traffic. The configuration CodeDeployDefault.LambdaCanary10Percent10Minutes implements a single 1010-minute step before routing all remaining traffic.

Key Concept

AWS CodeDeploy deployment configurations for AWS Lambda allow developers to gradually shift traffic between versions using Canary or Linear strategies.
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Topics

Deployment Strategies

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