Dagger with Node.js
Learn how to configure Dagger with Dotenv Vault in a simple Node.js web app. This tutorial assumes you are already familiar with
.env files and know how to sync them.
You can find a complete example repo here.
First, you will need a Dagger CI setup, so if you don’t have one already go ahead and create it. You can find an example Node.js setup in the Dagger repo here.
Once ready, proceed by installing the
dotenv-vault-core package with
npm install dotenv-vault-core --save
Reference the Vault package as early in your
index.js code as possible to skip any conflicts that may arise.
// index.js require('dotenv-vault-core').config() console.log(process.env) // for debugging purposes. remove when ready.
Build the Vault
Confirm you are logged in and your Vault is synced locally by running
npx dotenv-vault pull ci. Once ready, proceed by building your Vault with
npx dotenv-vault build.
npx dotenv-vault build
Once Vault has finished building, it will provide you with access to its decryption keys, which you can use to interact with protected environment variables with ease.
To retrieve a key, just input
npx dotenv-vault keys, followed by your preferred environment, like
ci, for example. You can do the same with other environments such as
The outcome of this will be a long URI being returned. You will immediately recognize it as it always starts with
dotenv://:key and ends in
?environment= with the environment you have chosen.
npx dotenv-vault keys ci remote: Listing .env.vault decryption keys... done dotenv://:[email protected]/vault/.env.vault?environment=ci
With the decryption key safely in your possession, it is time for you to set it as an environment variable on your client machine via CLI. Enter the key-value pair directly for UNIX systems or preceeded by
set for Windows. The set environment variable will remain available until you exit the CLI.
// UNIX DOTENV_KEY=dotenv://:[email protected]/vault/.env.vault?environment=ci // Windows set DOTENV_KEY=dotenv://:[email protected]/vault/.env.vault?environment=ci
Once ready, open your
main.go file, locate the container initialization line and call the
WithEnvVariable method for said container. Insert the key
"DOTENV_KEY" as the first argument, and use the
Getenv method as the second -
os.Getenv("DOTENV_KEY"). Here’s how it should look like if your container is declared as
// main.go container = container.WithEnvVariable("DOTENV_KEY", os.Getenv("DOTENV_KEY"))
Commit and push
Commit those changes safely to code and deploy to Dagger.
When the build runs, it will recognize the
DOTENV_KEY, decrypt the .env.vault file, and load the
ci environment variables to
DOTENV_KEY is not set when developing on local machine, for example, it will fall back to standard Dotenv functionality.
You’ll know things worked correctly when you see
'Loading .env from encrypted .env.vault' in your Dagger logs.