Generate Secret Key Base Rails

Oct 10, 2019  aws: accesskeyid: 123 secretaccesskey: 345 github: appid: 123 appsecret: 345 secretkeybase: When we save it, it encrypts again using the same master key. If default editor is not set and we haven’t specified the editor, then we get the following message: $ rails credentials:edit No $ EDITOR to open file in. The release of Rails 5.1 added another file named secrets.yml.enc to allow for encrypting your secret credentials, but this caused some confusion. The combination of config/secrets.yml, config/secrets.yml.enc, and SECRETKEYBASE made it so it wasn’t clear where secrets should be stored and what the relevance of SECRETKEYBASE was 2.

This article is a translation from https://qiita.com/kawasaki/items/dcaf5716c3fd5e2fe69f

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Digest version to set up the secret key in the production environment in Rails 5.1

  1. $ rails secrets:setup -> copy the long secret key in the first line and set it as an environment variable RAILS_MASTER_KEY when executing rails
  2. $ rails secret -> you will get the longer key; copy it
  3. $ EDITOR=vim rails secrets:edit write the following and save it from vim

Errors in the production environment when I run 'rails server'

I've developped my application happily in the development environment. But it's high time I prepared for the production environment, and I tried

$ rails server --environment production

and got
An unhandled lowlevel error occurred. The application logs may have details.

Oh, no.
Next, I tried
$ rails secrets:setup

which was introduced in Rails 5.1. But the error still remained. Going down in to the rails library, I got the point where I was wrong.

Anyway, you'll get the following output wehn you run rails secrets:setup

The encryption key 'a1e98ed29c40d7453a06bebeb815c0f3' in the first line is the most important key to protect the whole application and you must keep it secret. The key is automatically written down to config/secrets.yml.key.
Never commit it to your git repository, NEVER!
But usually you'll not commit it because the file config/secrets.yml.key is automatically added to .gitignore, so that the file is not to be committed.

For rails execution, you need either to import config/secrets.yml.key from somewhere or to set the secret key in the environment variable RAILS_MASTER_KEY.https://ameblo.jp/genmubunberg1970/entry-12632456749.html. Filemaker pro 16 license key generator mac 2018.

Actually, this in only the half of the necessary settings because what you did is to make a key to lock config/secrets.yml.enc, you treasure box. You still need to store your treasure.
This file, secrets.yml.enc is an encrypted yml file using your key. It looks like as follows.

To edit this file (if you use vim),
$ EDITOR=vim rails secrets:edit

The file looks like as follows.

Everything is commented out and nothing is specified above. You have to specify secret_key_base beneath production which is a secret key used for Cookie encryption. It is recommended to generate the secret key by using 'rails secret'.

Then, save it in your config/secrets.yml.enc by doing

Now, you have no error regarding the secret key in Rails.

/key-windows-7-home-premium-generator.html. By the way, you can store any kind of secret information here including database passwords. e.g.

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You can use the encrypted database password from your code by
Rails.application.secrets.postgresql_password
e.g. in config/database.yml.

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Generate Secret Key Base Rails

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Comments

commented May 19, 2014

I have recently deployed an app and got internal server error because of missing production secret_key_base. After hours of testing, I managed to solve this problem with two methods:

Method 1:

I generated a new secret_key with rake secret and replaced it with <%= ENV['SECRET_KEY_BASE'] %> in secrets.yml. Deployed the app again and this time it worked. But I think that this method is wrong.

Method 2:

I generated a new secret_key with rake secret and added it to environments/production.rb like config.secret_key_base = 'd1f4810e662acf46a33960e3aa5bd0************************, without changing secrets.yml (default is production: <%= ENV['SECRET_KEY_BASE'] %>). Deployed the app again and it works fine.

My questions:

  1. Which method is the best?
  2. If the 2nd method is correct, why rails does not generate a secret_key_base in production.rb by default?
  3. Is there any other method to do that?

Rails Generate Secret_key_base For Production

commented May 19, 2014

As the name implies, secret_key_base should be a secret. That's why we don't generate a secret for production in config/secrets.yml. You see that it's reading from an environment variable so you can easily set your secret on your production server, without changing the file:

If you want / need to have your secret under version control, you should definitely stick with Method 1. That's because Method 2 just avoids the config/secrets.yml mechanism all together.

Please note that we don't use GitHub for support questions. Read our contribution guidelines and please use the rails-talk mailing list for further questions.

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closed this May 19, 2014
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