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backstage/docs/conf/index.md
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2020-08-12 12:06:14 +02:00

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index Static Configuration in Backstage

Summary

Backstage ships with a flexible configuration system that provides a simple way to configure Backstage apps and plugins for both local development and production deployments. It helps get you up and running fast while adapting Backstage for your specific environment. It also serves as a tool for plugin authors to use to make it simple to pick up and install a plugin, while still allowing for customization.

Supplying Configuration

Configuration is stored in app-config.yaml files, with support for suffixes such as app-config.production.yaml to override values for specific environments. The configuration files themselves contain plain YAML, but with support for loading in secrets from various sources using a $secret key.

It is also possible to supply configuration through environment variables, for example APP_CONFIG_app_baseUrl=https://staging.example.com. However these should be used sparingly, usually just for temporary overrides during development or small tweaks to be able to reuse deployment artifacts in different environments.

The configuration is shared between the frontend and backend, meaning that values that are common between the two only needs to be defined once. Such as the backend.baseUrl.

For more details, see Writing Configuration.

Reading Configuration

As a plugin developer, you likely end up wanting to define configuration that you want users of your plugin to supply, as well as reading that configuration in frontend and backend plugins. For more details, see Reading Configuration and Defining Configuration.

Further Reading

More details are provided in dedicated sections of the documentation.