Well, they hardly build on a "host" anymore. Lots of them build in a docker
image, and on build2, the Debian8 is a lxc container.
Our goal is to move more builds to docker, and/or to create the build environment (whether
lxc or docker or VM or chroot) automatically. For most builds that's easy, but for
manuals, doxygen, coverity and some others it requires special privileges. One way to
solve this is to build the special jobs only on very specific build slaves and use the
regular (auto-generated) build slaves only for gerrit and non-gerrit buildjobs.
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Sent from a mobile device. Please excuse my brevity.