add RHEL7 Dockerfile

This Dockerfile packages ansible and the playbook as a container image.
It's a proof of concept as it makes some assumptions:
- bindmounts private key ~/.ssh/id_rsa
- default cmd executes the byo playbook

Dockerfile

@@ -0,0 +1,22 @@
+FROM rhel7
+
+MAINTAINER Aaron Weitekamp <aweiteka@redhat.com>
+
+RUN yum -y install http://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm
+
+# Not sure if all of these packages are necessary
+# only git and ansible are known requirements
+RUN yum install -y --enablerepo rhel-7-server-extras-rpms net-tools bind-utils tmux git ansible
+
+# Not sure if this repo is required
+RUN curl -o /etc/yum.repos.d/atomic-enterprise.repo http://mirror.ops.rhcloud.com/atomic/mirror/.atomic-enterprise-early-1/atomic-enterprise.repo
+
+RUN git clone https://github.com/projectatomic/atomic-enterprise-training.git \
+              /opt/training && \
+    git clone https://github.com/projectatomic/atomic-enterprise-ansible.git \
+              /opt/atomic-enterprise-ansible
+
+CMD ansible-playbook /opt/atomic-enterprise-ansible/playbooks/byo/config.yml
+
+LABEL RUN docker run -it --rm --net=host -v ~/.ssh/id_rsa:/root/.ssh/id_rsa -v /etc/ansible/hosts:/etc/ansible/hosts --name NAME -e NAME=NAME -e IMAGE=IMAGE IMAGE
+