Just created a pull request to add this functionality

https://github.com/docker/docker/pull/7239

We have the fix in docker-1.2 although not upstream yet.

We need to build a docker image with this version and set the environment variable.

docker --change should allow us to do this.  Will build this into docker-1.3.2-HTB.

docker --change is now in docker-1.4.1-10.el7

I've talked about it with Ian Mcleod and he should have fix ready soon. I've also asked him to set bash as default CMD for base images.

If my understanding is correct, the bug's key points split two parts.
1.The lastest RHEL image includes the ENV container=docker
With rhel-tools-docker-7.1-7.x86_64
# docker inspect -f {{.Config.Env}} rhel-tools-docker-7.1-7.x86_64
[container=docker]
# docker run rhel-tools-docker-7.1-7.x86_64 env | grep -i container
container=docker

2.Docker provides a machnism to support configurate the ENV in the image/container.
For what i know, 
ENV keyword in Dockerfile, few command with -e option and the --change option work for this purpose

So set VERIFIED

Ok, the question here is if this bug applies to

1) RHEL Base images,
2) rhel-tools, rsyslog... images,
3) both

In case of 1) we don't have that yet. It works for 2) and 3) is obvious result of previous statements. Can someone (Dan, Jen?) switch the bug to correct component? Because it is obviously not Docker.

All of Red Hat images should have this.  It will get a lot easier 0nce we are building layered images.

# docker run -it rhel-server-docker-7.1-4.x86_64
# export
declare -x container="docker"

move to verified

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHEA-2015-0615.html