Seems that the machine that was running our CentOS buildbot has disappeared. We can get a new one setup (probably a VM, not sure if the old one was physical hardware or a VM).
But the question is now what do we want. The CentOS buildbot was running a rather old version of CentOS, we actually had to install a few dependencies manually (APR, serf) because the OS packaged versions didn't meet our minimum requirements. So the buildbot was acting somewhat of a test of minimal requirements. Do we want to try and duplicate that or do we want a more modern CentOS?