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12factor env vars and secrets

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12factor

Secrets meant for usage with docker-based applications.

Uses envalid under the hood, but considers secrets for true integration of 12factor apps.

default secret path

defaults to /run/secrets/<secret_name>

You must set process.env.ENV_SECRETS_PATH to change this, for example,

process.env.ENV_SECRETS_PATH='/var/run/your/secrets/folder/';

or

ENV_SECRETS_PATH='/var/run/your/secrets/folder/' node yourapp.js

Recommended Usage

Using _FILE convention, include SECRET_NAME_FILE as a config var

const myEnv = env(
  process.env
  {
    // put all secrets here
    SECRET_NAME: str()
  },
  {
    // all config vars here
    PORT: port({ default: 10101 })
  }
);

If you haven't specified the value, you can enter it inside of a secret() call

const myEnv = env(
  process.env
  {
    // put all secrets here
    SECRET_NAME: secret('secret.txt') // will look in /run/secrets/secret.txt
  },
  {
    // all config vars here
    PORT: port({ default: 10101 })
  }
);

Examples

basic usage with envalid

if you use the _FILE standard:

  const myEnv = cleanEnv(
  process.env,
  {
    PORT: port({ default: 10101 }),
    GITHUB_TOKEN: secret(process.env.GITHUB_TOKEN_FILE)
  });

or you can specify the name of the secret file as it is stored

  const myEnv = cleanEnv(
  process.env,
  {
    PORT: port({ default: 10101 }),
    GITHUB_TOKEN: secret('github_token.txt')
  });

Better yet, just ensure that you use the env shortcut and it handles it for you

const myEnv = env(
  {
    GITHUB_TOKEN_FILE: process.env.GITHUB_TOKEN_FILE
  },
  {
    GITHUB_TOKEN: str()
  },
  {
    PORT: port({ default: 10101 })
  }
);

const { GITHUB_TOKEN, PORT } = myEnv;

env shortcut

Here env() expects 2 args, secrets and env vars.

In this example, it will look for /var/run/secrets/MAILGUN_KEY, and populate the final env with everything in one object.

  const myEnv = env(
    process.env,
    { MAILGUN_KEY: str() },
    { PORT: port({ default: 10101 }) }
  );

secret field

The secret object let's you specify the secret name as it is saved in the /var/run/secrets folder.

  const myEnv = env(
    process.env,
    { MAILGUN_KEY: secret('MAILGUN_KEY') },
    { PORT: port({ default: 10101 }) }
  );
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Quality67/100
Maintenance71/100