When starting Rancher, each environment is based on an environment template and in the environment template, you select which infrastructure service you’d like to start when creating an environment. These infrastructure services include type of orchestration, external DNS, networking, storage, and framework services (i.e. internal dns, metadata, and health check).
These infrastructure services are based on the templates in the
infra-templates folder of our Rancher catalog and community catalog. By default, both the Rancher catalog and community catalog are enabled, which provide a basic list of infrastructure services that can be used in an environment template.
When creating new environment templates, the default set of infrastructure services that are required to have a working environment are automatically enabled.