|
@@ -251,9 +251,14 @@ value ``<value>``. This value will be passed to all future ``RUN``
|
|
|
instructions. This is functionally equivalent to prefixing the command
|
|
|
with ``<key>=<value>``
|
|
|
|
|
|
+The environment variables set using ``ENV`` will persist when a container is run
|
|
|
+from the resulting image. You can view the values using ``docker inspect``, and change them using ``docker run --env <key>=<value>``.
|
|
|
+
|
|
|
.. note::
|
|
|
- The environment variables will persist when a container is run
|
|
|
- from the resulting image.
|
|
|
+ One example where this can cause unexpected consequenses, is setting
|
|
|
+ ``ENV DEBIAN_FRONTEND noninteractive``.
|
|
|
+ Which will persist when the container is run interactively; for example:
|
|
|
+ ``docker run -t -i image bash``
|
|
|
|
|
|
.. _dockerfile_add:
|
|
|
|