82 lines
2.6 KiB
Markdown
82 lines
2.6 KiB
Markdown
---
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title: Configuration
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---
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# Configuration
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We currently use the following gems for configuring the application:
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- [ENVied](https://github.com/eval/envied)
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- [rails-settings-cached](https://github.com/huacnlee/rails-settings-cached)
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- [vault](https://github.com/hashicorp/vault-ruby)
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## ENVied
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This gem is primarily used for configuring environment variables related to
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credentials and third party services. Examples:
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- `REDIS_URL`
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- `FASTLY_API_KEY`
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- `STRIPE_SECRET_KEY`
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Settings managed via ENVied can be found in
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[`Envfile`](https://github.com/forem/forem/blob/master/Envfile) (see
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[Configuring Environment Variables](../getting-started/config-env.md)) and
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viewed at `/internal/config` (see [the Internal guide](../internal/readme.md)):
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## rails-settings-cached
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We use this gem for managing settings used within the app's business logic.
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Examples:
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- `main_social_image`
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- `rate_limit_follow_count_daily`
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- `suggested_tags`
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These settings can be accessed via the
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[`SiteConfig`](https://github.com/forem/forem/blob/master/app/models/site_config.rb)
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object and viewed / modified via `/internal/config` (see
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[the Internal guide](../internal/readme.md)).
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## Vault
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The vault Ruby gem allows us to interact with
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[Vault](https://www.vaultproject.io/docs/what-is-vault). In a nutshell, Vault is
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a tool for securely storing and accessing secrets. It is completely optional for
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running a Forem. To access it we use the wrapper `AppSecrets`.
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```ruby
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class AppSecrets
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def self.[](key)
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result = Vault.kv(namespace).read(key)&.data&.fetch(:value) if ENV["VAULT_TOKEN"].present?
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result ||= ApplicationConfig[key]
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result
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rescue Vault::VaultError
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ApplicationConfig[key]
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end
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def self.[]=(key, value)
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Vault.kv(namespace).write(key, value: value)
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end
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def self.namespace
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ENV["VAULT_SECRET_NAMESPACE"]
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end
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private_class_method :namespace
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end
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```
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We attempt to access a secret from Vault if it is enabled, i.e. if the
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`VAULT_TOKEN` is present. If Vault is not enabled or if we cannot find the
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secret in it, then we fallback to fetching the secret from the
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`ApplicationConfig`.
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One advantage of using Vault with Forem is that it allows you to update your
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secrets easily through the application rather than having to mess with ENV
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files. If you would like to try out Vault, follow our
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[installation guide for setting it up locally](/installation/vault).
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