add inventory-generator under new sub pkg

images/inventory-generator/Dockerfile

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+FROM centos:7
+
+RUN INSTALL_PKGS="openssh-clients wget git" \
+    && yum install -y --setopt=tsflags=nodocs $INSTALL_PKGS \
+    && EPEL_PKGS="PyYAML ansible python2-boto" \
+ 	&& yum install -y epel-release \
+ 	&& yum install -y --setopt=tsflags=nodocs $EPEL_PKGS \
+    && rpm -q $INSTALL_PKGS $EPEL_PKGS \
+    && yum clean all
+
+LABEL name="dynamic-inventory-generator" \
+      summary="Generates inventory file from host information" \
+      description="A containerized dynamic inventory generator based on OpenShift host information"
+
+COPY root /
+
+ENV APP_ROOT=/opt/app-root \
+	HOME=/opt/app-root/src \
+	WORK_DIR=/opt/app-root \
+	USER_UID=1001
+
+WORKDIR ${HOME}
+RUN /usr/local/bin/user_setup
+
+ENTRYPOINT [ "/usr/local/bin/entrypoint" ]
+CMD [ "/usr/local/bin/run" ]

images/inventory-generator/README.md

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+Dynamic Inventory Generation
+============================
+
+Image that creates a container capable of
+connecting to an OpenShift master and dynamically
+creating an inventory file from its environment.
+
+### Build
+
+`docker build --rm -t openshift/inventory-gen .`
+
+### Run
+
+Given a master node's `master-config.yaml` file and its `admin.kubeconfig` file, the command below will:
+
+1. Connect to the host using the bind-mounted `libra.pem` file (replace with `id_rsa` or anything else used to access your remote machine via ssh)
+2. Generate an inventory file based on the current configuration and environment of the existing OpenShift deployment on the remote host
+3. run the specified [openshift-ansible](https://github.com/openshift/openshift-ansible) `health.yml` playbook using the generated inventory file from the previous step
+
+```
+docker run -u `id -u` \
+       -v $HOME/.ssh/libra.pem:/opt/app-root/src/.ssh/id_rsa:Z,ro \
+       -v /tmp/ssh/config:/opt/app-root/src/.ssh/config:Z,ro \
+       -v /tmp/origin/master/admin.kubeconfig:/opt/app-root/src/.kube/config:Z \
+       -v /tmp/aws/master-config.yaml:/opt/app-root/src/master-config.yaml:Z \
+       -e PLAYBOOK=playbooks/byo/openshift-checks/health.yml \
+       openshift/inventory-gen
+```
+
+If a `PLAYBOOK` environment variable is not supplied, the container will simply perform steps `1` and `2` from above, and output the contents of the generated inventory file to standard output.
+
+```
+$ docker run -u `id -u` \
+       -v $HOME/.ssh/libra.pem:/opt/app-root/src/.ssh/id_rsa:Z,ro \
+       -v /tmp/ssh/config:/opt/app-root/src/.ssh/config:Z,ro \
+       -v /tmp/origin/master/admin.kubeconfig:/opt/app-root/src/.kube/config:Z \
+       -v /tmp/aws/master-config.yaml:/opt/app-root/src/master-config.yaml:Z \
+       openshift/inventory-gen > myinventory
+
+$ cat myinventory
+localhost ansible_python_interpreter=/usr/bin/python
+
+[OSEv3:children]
+masters
+nodes
+etcd
+
+[OSEv3:vars]
+...
+```
+
+### Configure
+
+To include additional inventory variables in the final generated inventory file,
+create or edit the `root/etc/config.yaml` file.
+
+### Debug
+
+To debug the `generate` script, run the above script interactively
+and manually execute `/usr/local/bin/generate`:
+
+```
+...
+docker run -u `id -u` \
+       -v ...
+       ...
+       -it openshift/inventory-gen /bin/bash
+
+---
+
+bash-4.2$ ls
+master-config.yaml
+bash-4.2$ /usr/local/bin/generate
+bash-4.2$ ls
+generated_hosts  master-config.yaml
+bash-4.2$ less generated_hosts
+...
+```

images/inventory-generator/config.yaml

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+root/etc/config.yaml

images/inventory-generator/root/etc/config.yaml

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+---
+# default user configuration
+common_host_alias: openshiftdevel # host alias as defined in ~/.ssh/config
+ansible_ssh_user: ec2-user
+
+# openshift-ansible inventory vars
+openshift_uninstall_images: false
+openshift_install_examples: true
+openshift_deployment_type: origin
+
+# openshift cluster-admin credentials
+openshift_cluster_user: developer
+openshift_cluster_pass: fakepass

images/inventory-generator/root/usr/local/bin/entrypoint

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+#!/bin/bash -e
+#
+# This file serves as the main entrypoint to the inventory-generator image.
+#
+# For more information see the documentation:
+#	https://github.com/juanvallejo/dynamic-inventory/blob/master/README.md
+
+
+# Patch /etc/passwd file with the current user info.
+# The current user's entry must be correctly defined in this file in order for
+# the `ssh` command to work within the created container.
+
+if ! whoami &>/dev/null; then
+  echo "${USER:-default}:x:$(id -u):$(id -g):Default User:$HOME:/sbin/nologin" >> /etc/passwd
+fi
+
+exec "$@"