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Question 129 - DVA-C02 discussion

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A developer is building a serverless application by using AWS Serverless Application Model (AWS SAM) on multiple AWS Lambda functions. When the application is deployed, the developer wants to shift 10% of the traffic to the new deployment of the application for the first 10 minutes after deployment. If there are no issues, all traffic must switch over to the new version.

Which change to the AWS SAM template will meet these requirements?

A.
Set the Deployment Preference Type to Canaryl OPercent10Minutes. Set the AutoPublishAlias property to the Lambda alias.
Answers
A.
Set the Deployment Preference Type to Canaryl OPercent10Minutes. Set the AutoPublishAlias property to the Lambda alias.
B.
Set the Deployment Preference Type to Linearl OPercentEveryIOMinutes. Set AutoPubIishAIias property to the Lambda alias.
Answers
B.
Set the Deployment Preference Type to Linearl OPercentEveryIOMinutes. Set AutoPubIishAIias property to the Lambda alias.
C.
Set the Deployment Preference Type to Canaryl OPercentIOMinutes. Set the PreTraffic and PostTraffic properties to the Lambda alias.
Answers
C.
Set the Deployment Preference Type to Canaryl OPercentIOMinutes. Set the PreTraffic and PostTraffic properties to the Lambda alias.
D.
Set the Deployment Preference Type to Linearl OPercentEvery10Minutes. Set PreTraffic and PostTraffic properties to the Lambda alias.
Answers
D.
Set the Deployment Preference Type to Linearl OPercentEvery10Minutes. Set PreTraffic and PostTraffic properties to the Lambda alias.
Suggested answer: A

Explanation:

The Deployment Preference Type property specifies how traffic should be shifted between versions of a Lambda function1.The Canary10Percent10Minutes option means that 10% of the traffic is immediately shifted to the new version, and after 10 minutes, the remaining 90% of the traffic is shifted1. This matches the requirement of shifting 10% of the traffic for the first 10 minutes, and then switching all traffic to the new version.

The AutoPublishAlias property enables AWS SAM to automatically create and update a Lambda alias that points to the latest version of the function1.This is required to use the Deployment Preference Type property1. The alias name can be specified by the developer, and it can be used to invoke the function with the latest code.

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asked 16/09/2024
Takenobu Tanida
36 questions
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