Update Dockerfile.rhel7 to reflect changes to Dockerfile

The Dockerfile in the repo was updated to build upon playbook2image. This change
updates de product version to reflect that change.

Also updating the labels to the new format.

Dockerfile.rhel7

@@ -1,26 +1,41 @@
-FROM rhel7
+FROM openshift3/playbook2image
 
-MAINTAINER Troy Dawson <tdawson@redhat.com>
+MAINTAINER OpenShift Team <dev@lists.openshift.redhat.com>
 
-LABEL Name="openshift3/installer"
-LABEL Vendor="Red Hat" License=GPLv2+
-LABEL Version="v3.1.1.901"
-LABEL Release="6"
-LABEL BZComponent="aos3-installation-docker"
-LABEL Architecture="x86_64"
-LABEL io.k8s.description="Ansible code and playbooks for installing Openshift Container Platform." \
-      io.k8s.display-name="Openshift Installer" \
-      io.openshift.tags="openshift,installer"
+LABEL name="openshift3/openshift-ansible" \
+      summary="OpenShift's installation and configuration tool" \
+      description="A containerized openshift-ansible image to let you run playbooks to install, upgrade, maintain and check an OpenShift cluster" \
+      url="https://github.com/openshift/openshift-ansible" \
+      io.k8s.display-name="openshift-ansible" \
+      io.k8s.description="A containerized openshift-ansible image to let you run playbooks to install, upgrade, maintain and check an OpenShift cluster" \
+      io.openshift.expose-services="" \
+      io.openshift.tags="openshift,install,upgrade,ansible" \
+      com.redhat.component="aos3-installation-docker" \
+      version="v3.4.1" \
+      release="1" \
+      architecture="x86_64"
 
-RUN INSTALL_PKGS="atomic-openshift-utils" && \
-    yum install -y --enablerepo=rhel-7-server-ose-3.2-rpms $INSTALL_PKGS && \
-    rpm -V $INSTALL_PKGS && \
+# Playbooks, roles and their dependencies are installed from packages.
+# Unlike in Dockerfile, we don't invoke the 'assemble' script here
+# because all content and dependencies (like 'oc') is already
+# installed via yum.
+USER root
+RUN INSTALL_PKGS="atomic-openshift-utils atomic-openshift-clients" && \
+    yum repolist > /dev/null && \
+    yum-config-manager --enable rhel-7-server-ose-3.4-rpms && \
+    yum install -y $INSTALL_PKGS && \
     yum clean all
 
-# Expect user to mount a workdir for container output (installer.cfg, hosts inventory, ansible log)
-VOLUME /var/lib/openshift-installer/
-WORKDIR /var/lib/openshift-installer/
+USER ${USER_UID}
 
-RUN mkdir -p /var/lib/openshift-installer/
+# The playbook to be run is specified via the PLAYBOOK_FILE env var.
+# This sets a default of openshift_facts.yml as it's an informative playbook
+# that can help test that everything is set properly (inventory, sshkeys).
+# As the playbooks are installed via packages instead of being copied to
+# $APP_HOME by the 'assemble' script, we set the WORK_DIR env var to the
+# location of openshift-ansible.
+ENV PLAYBOOK_FILE=playbooks/byo/openshift_facts.yml \
+    WORK_DIR=/usr/share/ansible/openshift-ansible \
+    OPTS="-v"
 
-ENTRYPOINT ["/usr/bin/atomic-openshift-installer", "-c", "/var/lib/openshift-installer/installer.cfg", "--ansible-log-path", "/var/lib/openshift-installer/ansible.log"]
+CMD [ "/usr/libexec/s2i/run" ]