Hey everyone! I'm trying to figure out how to use Docker secrets to store API or library keys. I'm aware that I can't directly use process.env in my code, so what are some strategies to work around that? I've noticed that some libraries, like a better auth lib, attempt to read process.env secrets upon launch, which implies that many libraries might do the same. Any suggestions on how to manage this?
4 Answers
Thanks for your comment! So how do I handle using Docker secrets with libraries that rely on process.env?
The secrets will be mounted as files in the container. You can name this file anything you want and place it wherever inside the container. If your service is expecting process.env variables, you can mount the secret file in the desired path where the service looks for them.
You can securely pass the Docker secret to the library by using the file that Docker creates for the secret. If the library specifically looks for process.env.BETTER_AUTH_SECRET, you'll have to set that environment variable to the content of the secret file when starting your application.
Docker Secrets are designed to be accessed as file content rather than environment variables. Many images use a `_FILE` suffix for their environment variables, which points to the secret file (usually at `/run/secrets/SECRET_NAME`). If you export them to the container environment, it defeats the security purpose of using secrets.
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