See https://github.com/dx9/ceph/blob/master/README.alpine.md
Will submit to aports soonish...
Builder for Alpine Ceph Port
I've been building this on OSX using boot2docker-xhyve
To build the port run the following:
docker build -t build-alpine-ceph .
docker run -ti -v `pwd`/build:/build build-alpine-ceph