Automate Jenkins master and slave building

[Metallion]

Problem

Currently the Jenkins master and the slave on which we run unit tests and rpmbuild have been built manually. If they break, we're fucked. We should write scripts to build and rebuild them.

Currently both machines are VirtualBox VMs. I don't think this is ideal because it is not possible to run KVM inside of VirtualBox. This is something we will likely want to do for OpenVDC in the future but as long as VirtualBox is running on bare-metal, it is not possible to run KVM on the same machine. The main advantage of VirtualBox is that it will run on any OS but I don't think that is relevant for Jenkins. We are not likely to run it locally.

I would suggest to rebuild them as either KVM machines or docker containers.

Solution

• Have a meeting (or chat) to decide what hypervisor we should run Jenkins on.
• Write the scripts to automate building these. For KVM I'd suggest something similar to multibox and for Docker a Dockerfile (of course).
• We should probably also store the jenkins configuration on a private github repository that we periodically update so we can pull from there in the build script.