Hello,
I've mostly sent this kind of announcements on buildsys-fedora, while I
believe this mailing list would be far more suited.
https://github.com/alanfranz/docker-rpm-builder
docker-rpm-builder, basically, is a way to run plain old rpmbuild within
the target distribution of choice, without the need of setting up virtual
machines or managing state and leftover things. It should work on any host
distro that supports docker, and on OSX with
kitematic/docker-machine/boot2docker . It's being usually in real-world
scenarios for building packages since at least one year, mostly for RHEL
5-6-7, with good results, and it's pretty stable nowadays; I wouldn't know
what to add feature-wise, and I haven't received bug reports for a while
(although this statement probably calls for problems :-) ).