This cookbook maintains a .env file in each respective app's deploy directory. E.g.:

FOO: "http://www.yahoo.com"
BAR: "1001"

Your application can then load its settings directly from this file using dotenv (https://github.com/bkeepers/dotenv).

Expects attributes of the form:

{
  "custom_env": {
    "my_app": {
      "FOO": "http://www.yahoo.com",
      "BAR": "1001"
    },
    "your_app": {
      "BAZ": "99"
    }
  }
}

Opsworks Set-Up

The opsworks_custom_env::configure recipe should be added as a custom recipe to the Setup, Configure, and Deploy events.

A deploy is not necessary to update custom application environment values. Instead, update the Stack's custom JSON, then choose to Run Command > execute recipes and enter opsworks_custom_env::update into the Recipes to execute field. Executing this recipe will write an updated .env file and restart web server process.