How to create different stages or environments in single serverless.yml file using serverless framework?

Question

I am new to using serverless framework ,I wanted to create three different environments dev,Qa,prod. How do i create in single serverless.yml file ? The provider is AWS.

Answer 1

You can pass a stage CLI option that can be interpolated wherever needed in your serverless.yml file. For example, take the following CLI command:

serverless --stage dev deploy

This can be accessed in serverless.yml with ${opt:stage}. I usually include this under provider:

provider:
  stage: ${opt:stage}

Then you can get the value of the stage option anywhere in serverless.yml using ${self:provider.stage}.

When lambdas are deployed, their ARNs are automatically constructed with prefixes of the service name (as defined by the service key in serverless.yml), the stage, and the lambda name, like the following:

arn:aws:lambda:us-east-1:010101010101:function:myservice-dev-mylambdaname

So you can simply run the deploy CLI command for the other two stages/environments you want, and you'll have a set of separate resources for each environment.