| title: | Config |
|---|---|
| description: | Deis config refers to a set of environment variables used by containers in a formation’s runtime layer. |
| keywords: | config, release, envvar, envvars, environment, variables, deis |
Config refers to a set of environment variables used by :ref:`Containers <container>` in a :ref:`Formation's <formation>` runtime :ref:`layer`.
When Config is changed, a new :ref:`release` is created automatically.