aws-parameter-store-env

Loads environment variables from AWS Parameter Store

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aws-parameter-store-env
aws-parameter-store-env is a module that loads environment variables from AWS Parameter Store into process.env.

Install

# with npm
npm install aws-sdk aws-parameter-store-env

# with yarn
yarn add aws-sdk aws-parameter-store-env

Usage

Assuming the following parameters are defined in the AWS Parameter Store:
  • app/production/DBHOST
  • app/production/DBUSER
  • app/production/DBPASS

The following config can be used to pull those parameters into process.env.
require("aws-parameter-store-env")
  .config({
    path: "app/production/",
    parameters: [
      {
        name: "DB_HOST"
      },
      {
        name: "DB_USER",
        envName: "DB_USERNAME"
      },
      {
        name: "DB_PASS",
        envName: "DB_PASSWORD"
      }
    ],
    region: "us-east-1"
  })
  .then(() => {
    const { DB_HOST, DB_USERNAME, DB_PASSWORD } = process.env;
    // code to run after the environment has been configured
  });

Config

Options

parameters

This value is an array of Parameter objects that define which parameters should be retrieved from the AWS Parameter Store and how those parameters should be named when saved to process.env.
Here is an example Parameter object
{
  name: "app/production/secret",
  envName: "APP_SECRET"
}

The name attribute of the Parameter object is the name of the attribute to be retrieved from the AWS Parameter Store.
The envname attribute of the Parameter object is the name that should be used when applying the parameter value process.env. If this attribute isn't defined the name attribute will be used.
require("aws-parameter-store-env")
  .config({
    parameters: [
      {
        name: "app/production/DB_HOST",
        envName: "DB_HOST"
      },
      {
        name: "app/production/DB_USER",
        envName: "DB_USER"
      },
      {
        name: "app/production/DB_PASS",
        envName: "DB_PASS"
      }
    ],
    region: "us-east-1"
  })
  .then(() => {
    const { DB_HOST, DB_USER, DB_PASS } = process.env;
    // code to run after the environment has been configured
  });

path

The path attribute can be used to reduce redundancy in Parameter names.
require("aws-parameter-store-env")
  .config({
    path: "app/production/"
    parameters: [
      {
        name: "DB_HOST",
      },
      {
        name: "DB_USER",
      },
      {
        name: "DB_PASS",
      }
    ],
    region: "us-east-1"
  })
  .then(() => {
    const { DB_HOST, DB_USER, DB_PASS } = process.env;
    // code to run after the environment has been configured
  });

region

This value is passed to aws-sdk when the SSM service is created. This is the AWS region to pull parameters from.

withDecryption

Default: true
This value is passed passed to aws-sdk. It's then used to decide if secure string values should be decrypted by the SDK. See the AWS documentation for more information.
require("aws-parameter-store-env")
  .config({
    parameters: [
      {
        name: "parameter/store/var/that/you/dont/want/decrypted",
        envName: "ENCRYPTED_VAR"
      }
    ],
    region: "us-east-1",
    withDecryption: false
  })
  .then(() => {
    const { ENCRYPTED_VAR } = process.env;
    // code to run after the environment has been configured
  });

Callback

If you prefer callbacks over promises a callback can be passed as a second parameter to config.
require("aws-parameter-store-env").config(
  {
    path: "app/production/",
    parameters: [
      {
        name: "DB_HOST"
      },
      {
        name: "DB_USER",
        envName: "DB_USERNAME"
      },
      {
        name: "DB_PASS",
        envName: "DB_PASSWORD"
      }
    ],
    region: "us-east-1"
  },
  () => {
    const { DB_HOST, DB_USERNAME, DB_PASSWORD } = process.env;
    // code to run after the environment has been configured
  }
);