aws-sam-local environment variables

Question

I am following the readme here: https://github.com/awslabs/aws-sam-local

I have a lambda written in python 3.6 and its similar to the helloworld example here : https://g

Answer 1

Any environment variables you want to use with SAM Local in this manner need to exist in your SAM template. From this GitHub issue:

... SAM Local only parses environment variables that are defined in the SAM template.

In the template, you can provide no value, an empty string, or choose a sensible default.

A portion of a template including environment variables:

Resources:
  MyFunction1:
    Type: 'AWS::Serverless::Function'
    Properties:
      .....
      Environment:
        Variables:
          api_key:
          BUCKET_NAME:

---

You can think of the environment variables file as a mechanism to override environment variables that the template "knows" about. It does not work as a mechanism to inject arbitrary environment variables into the local runtime.