I created a resource in Amazon's ApiGateway. It is pointing to a Lambda function. This is being hit by a native mobile application (android and ios) which is already in the wild.
I now want to modify the Lambda function, but I see no way to change my ApiGateway resource to point to an alias of the lambda. This is my first time playing with any of these technologies and I see no easy mechanism to manage this in the aws console.
How can I modify my ApiGateway resource to point to my lambda alias so I can edit trunk without affecting existing clients?
Under Integration Type -> Lambda Function you need to add a reference to the stage variable MyLambdaFuntionName:${stageVariables.lambdaAlias} and then for each stage set the lambdaAlias in the Stage Variables tab accordingly(lambdaAlias=dev, lambdaAlias=prod, etc.)
There is an example with screenshots here: https://aws.amazon.com/blogs/compute/using-api-gateway-stage-variables-to-manage-lambda-functions/
Its kind of hidden towards the very bottom of the page starting with "Alternatively, you can mix and match static names"
For the later googler, be careful to add permissions WITH the correct alias like yourfunc:prod not only yourfunc. That means if you'r planning to use 3 alias to invoke the lambda functions, you have to add 3 of them.
来源：https://stackoverflow.com/questions/35472724/how-to-point-apigateway-to-a-specific-lambda-alias