+Note that the currently supported version is Lithium.
+
+## Overview
+
+The `opendaylight.spec` RPM spec file contains logic for packaging ODL's
+tarball release artifact and a systemd service file into RPMs. The `build.sh`
+helper script, when run in the simple Vagrant environment described by our
+`Vagrantfile`, standardizes the build process. Additional helper scripts
+are included for installing the noarch RPM, connecting to the ODL Karaf
+shell and uninstalling ODL.
+
+## Vagrant build environment
+
+The included `Vagrantfile` provides a simple, but tested and known-working,
+build environment. We recommend using it when building ODL's RPMs.
+
+```
+[~/integration/packaging/rpm]$ vagrant status
+Current machine states:
+
+default not created (virtualbox)
+[~/integration/packaging/rpm]$ vagrant up
+[~/integration/packaging/rpm]$ vagrant ssh
+[vagrant@localhost vagrant]$ cd /vagrant/
+[vagrant@localhost vagrant]$ ls
+build.sh connect.sh install.sh opendaylight.spec README.md Vagrantfile
+```