To build the OpenCrowbar RPMS (optionally including Ruby), perform the following steps:

1. Start in a clean checkout directory. We recommend $HOME/opencrowbar.
2. Clone the core and build-tools repos if you have not already done so with git clone https://github.com/opencrowbar/<reponame>
3. Clone any workload repositories you want to use. You can see the full list at https://github.com/opencrowbar
4. Run the RPM build process with $HOME/opencrowbar/build-tools/bin/make-rpms.sh. This will build RPM files for all the opencrowbar components. If you want to build our Ruby RPMs, add --with-ruby to the end of that command.
5. Use the fully-populated yum repository at $HOME/.cache/opencrowbar/tftpboot/centos-6.6/ocb-packages to install your new admin node. How to get the repo onto your already-built admin node is left as an excercise for the reader.