Provide single config to Multiple AWS APIs with Lambda integrations

Question

I am trying to write a simple API's using Amazon AWS API gateway with Lambda integration.

Lambda function to some computation by reading user input and some configuration.

How can I make both API's or lambda functions to use the same configuration without duplicating?

Correct me if i am using API gateway in wrong way.

Would you give an example of what you are trying to achieve? — Alexander Vitanov
– Alexander Vitanov, Commented Jun 9, 2018 at 12:50
I am writing some analytics api where it extracts information from different machines. machine ip address mapping is given as config. two lambda functions should able to read the config. — Rajeev
– Rajeev, Commented Jun 9, 2018 at 12:56
pseudocode : gist.github.com/rajeevprasanna/33425fe457a6d346e6a2c622863c2aaa — Rajeev
– Rajeev, Commented Jun 9, 2018 at 13:16

Alexander Vitanov · Accepted Answer · 2018-06-09 13:41:20Z

1

Two ways I can think of:

Create another lambda function which executes the common logic and invokes the corresponding lambda function with the data it processed. In your case:

def lambda_handler(event, context):    
    config = load config from env variable.
    take service names from user input(event)
    extract corresponding micro services names mapped to feature name.
    check event.methodName to see which function to call next
    invoke {event.methodName}Lambda with the data

(Recommended) Consider using Serverless where you define env variables only once and you can extract common logic into separate (non-lambda) functions which you can reuse in multiple lambda functions

answered Jun 9, 2018 at 13:41

Alexander Vitanov

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