Setting the env using a .env file in Serverless

Question

Using the Serverless framework, I want to be able to change the AWS region from an envrionment variable.

provider:
  name: aws
  region: ${env:AWS_REGION}

Then, AWS_REGION can be set to eu-west-2.

However, I want to have that set in a .env file:

AWS_REGION=eu-west-2

And then have that .env read by Serverless.

There are many topics about setting variables in the serverless.yml file, and exporting them from that file, but I want to put them into the file.

Is it feasible for your case to export those .env file content to a yaml file. The docs support referencing variables from other yaml/json files, but there is no evidence for an .env — vahdet
– vahdet, Commented Mar 1, 2019 at 14:15
Good question @vahdet. The reason for a .env locally is that it’s easier on CI/CD to just use envs. I have thought about a JSON or YAML file, but I would have to build it from envs on the CI/CD. — Zoe Edwards
– Zoe Edwards, Commented Mar 1, 2019 at 14:17

Nicolai Lissau · Accepted Answer · 2021-03-15 12:43:20Z

7

Serverless now supports .env files without the need for a plugin

Add useDotenv: true to your serverless.yml file. The variable should be at the root level, same as service: ...
Add a .env file at the root of your project and serverless will load the variables.

Example:

// .env
MY_TABLE=A_TABLE_NAME

answered Mar 15, 2021 at 12:43

Nicolai Lissau

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noetix · Accepted Answer · 2019-03-01 23:43:22Z

6

Out of the box serverless doesn't parse .env, that part belongs to you.

I see three options for you:

Use the serverless-dotenv-plugin.
Write a script that exports .env vars to your local environment before you run serverless.
Run serverless in docker-compose which is .env aware -- I use this in combination with Makefile, even in a CI/CD context.

answered Mar 1, 2019 at 23:43

noetix

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Muhammad Ibrahim · Accepted Answer · 2022-10-18 04:04:01Z

0

use this plugin to write .env with serverless.yaml serverless-export-env. so you just need to overwrite your region inside serverless yaml, and your env will be generated based on whay you've written in serverless.yaml.

answered Oct 18, 2022 at 4:04

Muhammad Ibrahim

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