Setting AWS env variables in Firebase cloud functions

Question

I'm using the AWS SDK in order to store images for my app. I'm using Firebase cloud functions rather than setting up my own server.

The AWS SDK is clever in that it can automatically detect environmental variables for connecting to an S3 instance: https://docs.aws.amazon.com/sdk-for-javascript/v2/developer-guide/loading-node-credentials-environment.html

The SDK automatically detects AWS credentials set as variables in your environment and uses them for SDK requests, eliminating the need to manage credentials in your application. The environment variables that you set to provide your credentials are:

AWS_ACCESS_KEY_ID

AWS_SECRET_ACCESS_KEY

AWS_SESSION_TOKEN (optional)

However, in Firebase, all environmental variables must be lowercase. https://firebase.google.com/docs/functions/config-env

Keep in mind that only lowercase characters are accepted in keys; uppercase characters are not allowed.

Is there any solution to setting AWS environmental variables in Firebase functions?

Nils Nils · Accepted Answer · 2021-05-01T21:16:48

You can use the Firebase environment variables in a client's config object:

in the cli:

firebase functions:config:set aws.access_key_id="your_key"
firebase functions:config:set aws.secret_access_key="your_key"

on cloud functions:

const someClient = new Client({
    region: "your_region",
    credentials: {
      accessKeyId: functions.config().aws.access_key_id,
      secretAccessKey: functions.config().aws.secret_access_key
    }
  });

Setting AWS env variables in Firebase cloud functions

2 Answers