Secrets

This plugin manages secrets on Shuttle.

​

Usage

Add a Secrets.toml to the crate root or workspace root of your Shuttle service with the secrets you’d like to store. Make sure to add Secrets*.toml to a .gitignore to omit your secrets from version control.

The format of the Secrets.toml file is a key-value mapping with string values.

MY_API_KEY = 'the contents of my API key'
MY_OTHER_SECRET = 'some other secret'

Next, pass #[shuttle_runtime::Secrets] secrets: shuttle_runtime::SecretStore as an argument to your shuttle_runtime::main function. SecretStore::get can now be called to retrieve your API keys and other secrets at runtime.

​

Local secrets

When developing locally with cargo shuttle run, you can use a different set of secrets by adding a Secrets.dev.toml file.

If you don’t have a Secrets.dev.toml file, Secrets.toml will be used locally as well as for deployments. If you want to have both secret files with some of the same secrets for both local runs and deployments, you have to duplicate the secret across both files.

​

Different secrets file

You can also use other secrets files (in TOML format) by using the --secrets [file] argument on the run and deploy commands.

When deploying with the --secrets arg, that file is renamed to Secrets.toml before being packed and sent to Shuttle. Therefore, it has to be in the same folder that a normal Secrets.toml file would have been placed.

​

Example

This snippet shows a Shuttle rocket main function that uses the shuttle_runtime::Secrets attribute to gain access to a SecretStore.

use shuttle_runtime::SecretStore;

#[shuttle_runtime::main]
async fn rocket(
    #[shuttle_runtime::Secrets] secrets: SecretStore,
) -> shuttle_rocket::ShuttleRocket {
    // get secret defined in `Secrets.toml` file.
    let secret = secrets.get("MY_API_KEY").context("secret was not found")?;

    let state = MyState { secret };
    let rocket = rocket::build().mount("/", routes![secret]).manage(state);

    Ok(rocket.into())
}

The full example can be found on GitHub

​

Deleting secrets

This command will delete all secrets from your project. Re-deploy with an updated Secrets.toml to add them back.

cargo shuttle resource delete secrets

​

Caveats

• Some libraries read from their own config files or environment variables, with no way of providing them in code. Sometimes, this can be solved by manually setting the variable after loading the secret (and before loading the library): std::env::set_var("SOME_ENV_VAR", my_secret);