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# Application secrets
This page is a development guide for application secrets.
## Secret entries
|Entry |Description |
|--- |--- |
|`secret_key_base` | The base key to be used for generating a various secrets |
| `otp_key_base` | The base key for One Time Passwords, described in [User management](../raketasks/user_management.md#rotate-two-factor-authentication-encryption-key) |
|`db_key_base` | The base key to encrypt the data for `attr_encrypted` columns |
|`openid_connect_signing_key` | The singing key for OpenID Connect |
## Where the secrets are stored
|Installation type |Location |
|--- |--- |
|Omnibus |[`/etc/gitlab/gitlab-secrets.json`](https://docs.gitlab.com/omnibus/settings/backups.html#backup-and-restore-omnibus-gitlab-configuration) |
|Cloud Native GitLab Charts |[Kubernets Secrets](https://gitlab.com/gitlab-org/charts/gitlab/-/blob/f65c3d37fc8cf09a7987544680413552fb666aac/doc/installation/secrets.md#gitlab-rails-secret)|
|Source |`<path-to-gitlab-rails>/config/secrets.yml` (Automatically generated by [01_secret_token.rb](https://gitlab.com/gitlab-org/gitlab/-/blob/master/config/initializers/01_secret_token.rb)) |
## Warning: Before you add a new secret to application secrets
Before you add a new secret to [`config/initializers/01_secret_token.rb`](https://gitlab.com/gitlab-org/gitlab/-/blob/master/config/initializers/01_secret_token.rb),
make sure you also update Omnibus GitLab or updates will fail. Omnibus is responsible for writing the `secrets.yml` file.
If Omnibus doesn't know about a secret, Rails will attempt to write to the file, but this will fail because Rails doesn't have write access.
The same rules apply to Cloud Native GitLab charts, you must update the charts at first.
In case you need the secret to have same value on each node (which is usually the case) you need to make sure it's configured for all
GitLab.com environments prior to changing this file.
**Examples**
- [Change for source installation](https://gitlab.com/gitlab-org/gitlab-foss/-/merge_requests/27581)
- [Change for omnibus installation](https://gitlab.com/gitlab-org/omnibus-gitlab/-/merge_requests/3267)
- [Change for omnibus installation](https://gitlab.com/gitlab-org/omnibus-gitlab/-/merge_requests/4158)
- [Change for Cloud Native installation](https://gitlab.com/gitlab-org/charts/gitlab/-/merge_requests/1318)
## Further iteration
We might deprecate/remove this automatic secret generation '01_secret_token.rb' in the future.
Please see [this issue](https://gitlab.com/gitlab-org/gitlab/-/issues/222690) for more information.
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