: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:

Config
======
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.