Exam AWS Certified Solutions Architect - Professional topic 1 question 605 discussion

A. Alias traffic shifting. https://aws.amazon.com/blogs/compute/implementing-canary-deployments-of-aws-lambda-functions-with-alias-traffic-shifting/

A. Lambda aliases are a way to point to multiple versions of a Lambda function. This can be useful for testing new versions of a function before rolling them out to production, or for running multiple versions of a function in parallel to test different approaches. When you create a Lambda alias, you can specify a routing configuration. This configuration determines how traffic is routed between the alias and the function versions it points to. There are two types of routing configurations: Static routing: With static routing, you specify a fixed percentage of traffic that is routed to each function version. Canary routing: With canary routing, you specify a starting percentage of traffic that is routed to a new function version. Over time, the percentage of traffic routed to the new function version increases, while the percentage of traffic routed to the old function version decreases.

A is My answer.

# Update $LATEST version of function aws lambda update-function-code --function-name myfunction …. # Publish new version of function aws lambda publish-version --function-name myfunction # Point alias to new version, weighted at 5% (original version at 95% of traffic) aws lambda update-alias --function-name myfunction --name myalias --routing-config '{"AdditionalVersionWeights" : {"2" : 0.05} }' # Verify that the new version is healthy … # Set the primary version on the alias to the new version and reset the additional versions (100% weighted) aws lambda update-alias --function-name myfunction --name myalias --function-version 2 --routing-config '{}' This is begging to be automate

A is the answer

NONE of them is correct. B and D are nonsense. B - there's no point to deploy a new Lambda every time and edit rte D - Look it up here. https://docs.amazonaws.cn/en_us/codedeploy/latest/userguide/deployment-configurations.html Between A and C. A is wrong because "Create an alias for every new deployed version". The alias it's the same, the weight between the versions for the alias it's different. You point out to the alias and then operate with version. C it's wrong because you have to use update-alias instead of update-function-configuration. So it's either A and C phrasing is messed up or none of them is correct.

A. Create an alias for every new deployed version of the Lambda function. Use the AWS CLI update-alias command with the routing-config parameter to distribute the load.

Correct Answer A. there is no second thoughts also!

AAA ---

I'll go with A

A is the answer. Refer below link for details explanation on how Lambda Alias works. https://docs.aws.amazon.com/lambda/latest/dg/configuration-aliases.html

it's A

going with A

Maybe a Typo but it's not need to create an ALIAS for every every function deployment...

A is my answer

A is the correct option for Serverless.

Correct is A . Update alias traffic